3032 lines
88 KiB
C
3032 lines
88 KiB
C
/*
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* mini-exceptions.c: generic exception support
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*
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* Authors:
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* Dietmar Maurer (dietmar@ximian.com)
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* Mono Team (mono-list@lists.ximian.com)
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*
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* Copyright 2001-2003 Ximian, Inc.
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* Copyright 2003-2008 Novell, Inc.
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* Copyright 2011 Xamarin Inc (http://www.xamarin.com).
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*/
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#include <config.h>
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#include <glib.h>
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#include <string.h>
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#ifdef HAVE_SIGNAL_H
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#include <signal.h>
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#endif
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#ifdef HAVE_EXECINFO_H
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#include <execinfo.h>
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#endif
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#ifdef HAVE_SYS_TYPES_H
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#include <sys/types.h>
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#endif
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#ifdef HAVE_SYS_WAIT_H
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#include <sys/wait.h>
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#endif
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#ifdef HAVE_UNISTD_H
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#include <unistd.h>
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#endif
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#ifdef HAVE_SYS_SYSCALL_H
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#include <sys/syscall.h>
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#endif
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#ifdef HAVE_SYS_PRCTL_H
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#include <sys/prctl.h>
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#endif
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#ifdef HAVE_UNWIND_H
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#include <unwind.h>
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#endif
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#include <mono/metadata/appdomain.h>
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#include <mono/metadata/tabledefs.h>
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#include <mono/metadata/threads.h>
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#include <mono/metadata/threads-types.h>
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#include <mono/metadata/debug-helpers.h>
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#include <mono/metadata/exception.h>
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#include <mono/metadata/object-internals.h>
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#include <mono/metadata/gc-internals.h>
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#include <mono/metadata/mono-debug.h>
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#include <mono/metadata/profiler.h>
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#include <mono/metadata/mono-endian.h>
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#include <mono/metadata/environment.h>
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#include <mono/metadata/mono-mlist.h>
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#include <mono/utils/mono-mmap.h>
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#include <mono/utils/mono-logger-internals.h>
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#include "mini.h"
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#include "trace.h"
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#include "debugger-agent.h"
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#include "seq-points.h"
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#include "llvm-runtime.h"
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#include "mini-llvm.h"
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#ifdef ENABLE_LLVM
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#include "mini-llvm-cpp.h"
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#endif
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#ifdef ENABLE_EXTENSION_MODULE
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#include "../../../mono-extensions/mono/mini/mini-exceptions.c"
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#endif
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#ifndef MONO_ARCH_CONTEXT_DEF
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#define MONO_ARCH_CONTEXT_DEF
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#endif
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static gpointer restore_context_func, call_filter_func;
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static gpointer throw_exception_func, rethrow_exception_func;
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static gpointer throw_corlib_exception_func;
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static gpointer try_more_restore_tramp = NULL;
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static gpointer restore_stack_protection_tramp = NULL;
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static MonoUnhandledExceptionFunc unhandled_exception_hook = NULL;
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static gpointer unhandled_exception_hook_data = NULL;
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static void try_more_restore (void);
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static void restore_stack_protection (void);
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static void mono_walk_stack_full (MonoJitStackWalk func, MonoContext *start_ctx, MonoDomain *domain, MonoJitTlsData *jit_tls, MonoLMF *lmf, MonoUnwindOptions unwind_options, gpointer user_data);
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static void mono_raise_exception_with_ctx (MonoException *exc, MonoContext *ctx);
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static void mono_runtime_walk_stack_with_ctx (MonoJitStackWalk func, MonoContext *start_ctx, MonoUnwindOptions unwind_options, void *user_data);
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void
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mono_exceptions_init (void)
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{
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MonoRuntimeExceptionHandlingCallbacks cbs;
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if (mono_aot_only) {
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restore_context_func = mono_aot_get_trampoline ("restore_context");
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call_filter_func = mono_aot_get_trampoline ("call_filter");
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throw_exception_func = mono_aot_get_trampoline ("throw_exception");
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rethrow_exception_func = mono_aot_get_trampoline ("rethrow_exception");
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} else {
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MonoTrampInfo *info;
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restore_context_func = mono_arch_get_restore_context (&info, FALSE);
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mono_tramp_info_register (info, NULL);
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call_filter_func = mono_arch_get_call_filter (&info, FALSE);
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mono_tramp_info_register (info, NULL);
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throw_exception_func = mono_arch_get_throw_exception (&info, FALSE);
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mono_tramp_info_register (info, NULL);
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rethrow_exception_func = mono_arch_get_rethrow_exception (&info, FALSE);
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mono_tramp_info_register (info, NULL);
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}
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#ifdef MONO_ARCH_HAVE_RESTORE_STACK_SUPPORT
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if (!mono_llvm_only) {
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try_more_restore_tramp = mono_create_specific_trampoline (try_more_restore, MONO_TRAMPOLINE_RESTORE_STACK_PROT, mono_domain_get (), NULL);
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restore_stack_protection_tramp = mono_create_specific_trampoline (restore_stack_protection, MONO_TRAMPOLINE_RESTORE_STACK_PROT, mono_domain_get (), NULL);
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}
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#endif
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#ifdef MONO_ARCH_HAVE_EXCEPTIONS_INIT
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mono_arch_exceptions_init ();
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#endif
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cbs.mono_walk_stack_with_ctx = mono_runtime_walk_stack_with_ctx;
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cbs.mono_walk_stack_with_state = mono_walk_stack_with_state;
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if (mono_llvm_only)
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cbs.mono_raise_exception = mono_llvm_raise_exception;
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else
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cbs.mono_raise_exception = (void (*)(MonoException *))mono_get_throw_exception ();
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cbs.mono_raise_exception_with_ctx = mono_raise_exception_with_ctx;
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cbs.mono_exception_walk_trace = mono_exception_walk_trace;
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cbs.mono_install_handler_block_guard = mono_install_handler_block_guard;
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mono_install_eh_callbacks (&cbs);
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}
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gpointer
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mono_get_throw_exception (void)
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{
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g_assert (throw_exception_func);
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return throw_exception_func;
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}
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gpointer
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mono_get_rethrow_exception (void)
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{
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g_assert (rethrow_exception_func);
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return rethrow_exception_func;
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}
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gpointer
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mono_get_call_filter (void)
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{
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g_assert (call_filter_func);
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return call_filter_func;
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}
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gpointer
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mono_get_restore_context (void)
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{
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g_assert (restore_context_func);
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return restore_context_func;
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}
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gpointer
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mono_get_throw_corlib_exception (void)
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{
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gpointer code = NULL;
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MonoTrampInfo *info;
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/* This depends on corlib classes so cannot be inited in mono_exceptions_init () */
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if (throw_corlib_exception_func)
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return throw_corlib_exception_func;
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if (mono_aot_only)
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code = mono_aot_get_trampoline ("throw_corlib_exception");
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else {
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code = mono_arch_get_throw_corlib_exception (&info, FALSE);
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mono_tramp_info_register (info, NULL);
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}
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mono_memory_barrier ();
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throw_corlib_exception_func = code;
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return throw_corlib_exception_func;
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}
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static gboolean
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is_address_protected (MonoJitInfo *ji, MonoJitExceptionInfo *ei, gpointer ip)
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{
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MonoTryBlockHoleTableJitInfo *table;
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int i;
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guint32 offset;
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guint16 clause;
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if (ei->try_start > ip || ip >= ei->try_end)
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return FALSE;
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if (!ji->has_try_block_holes)
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return TRUE;
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table = mono_jit_info_get_try_block_hole_table_info (ji);
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offset = (guint32)((char*)ip - (char*)ji->code_start);
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clause = (guint16)(ei - ji->clauses);
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g_assert (clause < ji->num_clauses);
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for (i = 0; i < table->num_holes; ++i) {
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MonoTryBlockHoleJitInfo *hole = &table->holes [i];
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if (hole->clause == clause && hole->offset <= offset && hole->offset + hole->length > offset)
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return FALSE;
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}
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return TRUE;
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}
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#ifdef MONO_ARCH_HAVE_UNWIND_BACKTRACE
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#if 0
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static gboolean show_native_addresses = TRUE;
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#else
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static gboolean show_native_addresses = FALSE;
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#endif
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static _Unwind_Reason_Code
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build_stack_trace (struct _Unwind_Context *frame_ctx, void *state)
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{
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MonoDomain *domain = mono_domain_get ();
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uintptr_t ip = _Unwind_GetIP (frame_ctx);
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if (show_native_addresses || mono_jit_info_table_find (domain, (char*)ip)) {
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GList **trace_ips = (GList **)state;
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*trace_ips = g_list_prepend (*trace_ips, (gpointer)ip);
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}
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return _URC_NO_REASON;
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}
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static GSList*
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get_unwind_backtrace (void)
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{
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GSList *ips = NULL;
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_Unwind_Backtrace (build_stack_trace, &ips);
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return g_slist_reverse (ips);
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}
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#else
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static GSList*
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get_unwind_backtrace (void)
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{
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return NULL;
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}
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#endif
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/*
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* find_jit_info:
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*
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* Translate between the mono_arch_unwind_frame function and the old API.
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*/
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static MonoJitInfo *
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find_jit_info (MonoDomain *domain, MonoJitTlsData *jit_tls, MonoJitInfo *res, MonoJitInfo *prev_ji, MonoContext *ctx,
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MonoContext *new_ctx, MonoLMF **lmf, gboolean *managed)
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{
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StackFrameInfo frame;
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MonoJitInfo *ji;
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gboolean err;
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gpointer ip = MONO_CONTEXT_GET_IP (ctx);
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/* Avoid costly table lookup during stack overflow */
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if (prev_ji && (ip > prev_ji->code_start && ((guint8*)ip < ((guint8*)prev_ji->code_start) + prev_ji->code_size)))
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ji = prev_ji;
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else
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ji = mini_jit_info_table_find (domain, (char *)ip, NULL);
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if (managed)
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*managed = FALSE;
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err = mono_arch_unwind_frame (domain, jit_tls, ji, ctx, new_ctx, lmf, NULL, &frame);
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if (!err)
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return (MonoJitInfo *)-1;
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if (*lmf && ((*lmf) != jit_tls->first_lmf) && ((gpointer)MONO_CONTEXT_GET_SP (new_ctx) >= (gpointer)(*lmf))) {
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/*
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* Remove any unused lmf.
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* Mask out the lower bits which might be used to hold additional information.
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*/
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*lmf = (MonoLMF *)(((gsize)(*lmf)->previous_lmf) & ~(SIZEOF_VOID_P -1));
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}
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/* Convert between the new and the old APIs */
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switch (frame.type) {
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case FRAME_TYPE_MANAGED:
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if (managed)
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*managed = TRUE;
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return frame.ji;
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case FRAME_TYPE_TRAMPOLINE:
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return frame.ji;
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case FRAME_TYPE_MANAGED_TO_NATIVE:
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if (frame.ji)
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return frame.ji;
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else {
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memset (res, 0, sizeof (MonoJitInfo));
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res->d.method = frame.method;
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return res;
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}
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case FRAME_TYPE_DEBUGGER_INVOKE: {
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MonoContext tmp_ctx;
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/*
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* The normal exception handling code can't handle this frame, so just
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* skip it.
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*/
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ji = find_jit_info (domain, jit_tls, res, NULL, new_ctx, &tmp_ctx, lmf, managed);
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memcpy (new_ctx, &tmp_ctx, sizeof (MonoContext));
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return ji;
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}
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default:
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g_assert_not_reached ();
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return NULL;
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}
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}
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/* mono_find_jit_info:
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*
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* This function is used to gather information from @ctx. It return the
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* MonoJitInfo of the corresponding function, unwinds one stack frame and
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* stores the resulting context into @new_ctx. It also stores a string
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* describing the stack location into @trace (if not NULL), and modifies
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* the @lmf if necessary. @native_offset return the IP offset from the
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* start of the function or -1 if that info is not available.
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*/
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MonoJitInfo *
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mono_find_jit_info (MonoDomain *domain, MonoJitTlsData *jit_tls, MonoJitInfo *res, MonoJitInfo *prev_ji, MonoContext *ctx,
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MonoContext *new_ctx, char **trace, MonoLMF **lmf, int *native_offset,
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gboolean *managed)
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{
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gboolean managed2;
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gpointer ip = MONO_CONTEXT_GET_IP (ctx);
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MonoJitInfo *ji;
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MonoMethod *method = NULL;
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if (trace)
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*trace = NULL;
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if (native_offset)
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*native_offset = -1;
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if (managed)
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*managed = FALSE;
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ji = find_jit_info (domain, jit_tls, res, prev_ji, ctx, new_ctx, lmf, &managed2);
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if (ji == (gpointer)-1)
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return ji;
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if (ji && !ji->is_trampoline)
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method = jinfo_get_method (ji);
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if (managed2 || (method && method->wrapper_type)) {
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const char *real_ip, *start;
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gint32 offset;
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start = (const char *)ji->code_start;
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if (!managed2)
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/* ctx->ip points into native code */
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real_ip = (const char*)MONO_CONTEXT_GET_IP (new_ctx);
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else
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real_ip = (const char*)ip;
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if ((real_ip >= start) && (real_ip <= start + ji->code_size))
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offset = real_ip - start;
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else
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offset = -1;
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if (native_offset)
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*native_offset = offset;
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if (managed)
|
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if (!method->wrapper_type || method->wrapper_type == MONO_WRAPPER_DYNAMIC_METHOD)
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*managed = TRUE;
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if (trace)
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*trace = mono_debug_print_stack_frame (method, offset, domain);
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} else {
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if (trace) {
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char *fname = mono_method_full_name (jinfo_get_method (res), TRUE);
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*trace = g_strdup_printf ("in (unmanaged) %s", fname);
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g_free (fname);
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}
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}
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return ji;
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}
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|
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/*
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* mono_find_jit_info_ext:
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|
*
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* A version of mono_find_jit_info which returns all data in the StackFrameInfo
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* structure.
|
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* A note about frames of type FRAME_TYPE_MANAGED_TO_NATIVE:
|
|
* - These frames are used to mark managed-to-native transitions, so CTX will refer to native
|
|
* code, and new_ctx will refer to the last managed frame. The caller should unwind once more
|
|
* to obtain the last managed frame.
|
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* If SAVE_LOCATIONS is not NULL, it should point to an array of size MONO_MAX_IREGS.
|
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* On return, it will be filled with the locations where callee saved registers are saved
|
|
* by the current frame. This is returned outside of StackFrameInfo because it can be
|
|
* quite large on some platforms.
|
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* If ASYNC true, this function will be async safe, but some fields of frame and frame->ji will
|
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* not be set.
|
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*/
|
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gboolean
|
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mono_find_jit_info_ext (MonoDomain *domain, MonoJitTlsData *jit_tls,
|
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MonoJitInfo *prev_ji, MonoContext *ctx,
|
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MonoContext *new_ctx, char **trace, MonoLMF **lmf,
|
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mgreg_t **save_locations,
|
|
StackFrameInfo *frame)
|
|
{
|
|
gboolean err;
|
|
gpointer ip = MONO_CONTEXT_GET_IP (ctx);
|
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MonoJitInfo *ji;
|
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MonoDomain *target_domain = domain;
|
|
MonoMethod *method = NULL;
|
|
gboolean async = mono_thread_info_is_async_context ();
|
|
|
|
if (trace)
|
|
*trace = NULL;
|
|
|
|
/* Avoid costly table lookup during stack overflow */
|
|
if (prev_ji && (ip > prev_ji->code_start && ((guint8*)ip < ((guint8*)prev_ji->code_start) + prev_ji->code_size)))
|
|
ji = prev_ji;
|
|
else
|
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ji = mini_jit_info_table_find (domain, (char *)ip, &target_domain);
|
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|
|
if (!target_domain)
|
|
target_domain = domain;
|
|
|
|
if (save_locations)
|
|
memset (save_locations, 0, MONO_MAX_IREGS * sizeof (mgreg_t*));
|
|
|
|
err = mono_arch_unwind_frame (target_domain, jit_tls, ji, ctx, new_ctx, lmf, save_locations, frame);
|
|
if (!err)
|
|
return FALSE;
|
|
|
|
if (*lmf && ((*lmf) != jit_tls->first_lmf) && ((gpointer)MONO_CONTEXT_GET_SP (new_ctx) >= (gpointer)(*lmf))) {
|
|
/*
|
|
* Remove any unused lmf.
|
|
* Mask out the lower bits which might be used to hold additional information.
|
|
*/
|
|
*lmf = (MonoLMF *)(((gsize)(*lmf)->previous_lmf) & ~(SIZEOF_VOID_P -1));
|
|
}
|
|
|
|
if (frame->ji && !frame->ji->is_trampoline && !frame->ji->async)
|
|
method = jinfo_get_method (frame->ji);
|
|
|
|
if (frame->type == FRAME_TYPE_MANAGED && method) {
|
|
if (!method->wrapper_type || method->wrapper_type == MONO_WRAPPER_DYNAMIC_METHOD)
|
|
frame->managed = TRUE;
|
|
}
|
|
|
|
if (frame->type == FRAME_TYPE_MANAGED_TO_NATIVE) {
|
|
/*
|
|
* This type of frame is just a marker, the caller should unwind once more to get the
|
|
* last managed frame.
|
|
*/
|
|
frame->ji = NULL;
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frame->method = NULL;
|
|
}
|
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|
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frame->native_offset = -1;
|
|
frame->domain = target_domain;
|
|
frame->async_context = async;
|
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|
|
ji = frame->ji;
|
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|
|
if (frame->type == FRAME_TYPE_MANAGED)
|
|
frame->method = method;
|
|
|
|
if (ji && (frame->managed || (method && method->wrapper_type))) {
|
|
const char *real_ip, *start;
|
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|
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start = (const char *)ji->code_start;
|
|
if (frame->type == FRAME_TYPE_MANAGED)
|
|
real_ip = (const char*)ip;
|
|
else
|
|
/* ctx->ip points into native code */
|
|
real_ip = (const char*)MONO_CONTEXT_GET_IP (new_ctx);
|
|
|
|
if ((real_ip >= start) && (real_ip <= start + ji->code_size))
|
|
frame->native_offset = real_ip - start;
|
|
else {
|
|
frame->native_offset = -1;
|
|
}
|
|
|
|
if (trace)
|
|
*trace = mono_debug_print_stack_frame (method, frame->native_offset, domain);
|
|
} else {
|
|
if (trace && frame->method) {
|
|
char *fname = mono_method_full_name (frame->method, TRUE);
|
|
*trace = g_strdup_printf ("in (unmanaged) %s", fname);
|
|
g_free (fname);
|
|
}
|
|
}
|
|
|
|
return TRUE;
|
|
}
|
|
|
|
/*
|
|
* This function is async-safe.
|
|
*/
|
|
static gpointer
|
|
get_generic_info_from_stack_frame (MonoJitInfo *ji, MonoContext *ctx)
|
|
{
|
|
MonoGenericJitInfo *gi;
|
|
MonoMethod *method;
|
|
gpointer info;
|
|
|
|
if (!ji->has_generic_jit_info)
|
|
return NULL;
|
|
gi = mono_jit_info_get_generic_jit_info (ji);
|
|
if (!gi->has_this)
|
|
return NULL;
|
|
|
|
info = NULL;
|
|
/*
|
|
* Search location list if available, it contains the precise location of the
|
|
* argument for every pc offset, even if the method was interrupted while it was in
|
|
* its prolog.
|
|
*/
|
|
if (gi->nlocs) {
|
|
int offset = (mgreg_t)MONO_CONTEXT_GET_IP (ctx) - (mgreg_t)ji->code_start;
|
|
int i;
|
|
|
|
for (i = 0; i < gi->nlocs; ++i) {
|
|
MonoDwarfLocListEntry *entry = &gi->locations [i];
|
|
|
|
if (offset >= entry->from && (offset < entry->to || entry->to == 0)) {
|
|
if (entry->is_reg)
|
|
info = (gpointer)mono_arch_context_get_int_reg (ctx, entry->reg);
|
|
else
|
|
info = *(gpointer*)(gpointer)((char*)mono_arch_context_get_int_reg (ctx, entry->reg) + entry->offset);
|
|
break;
|
|
}
|
|
}
|
|
g_assert (i < gi->nlocs);
|
|
} else {
|
|
if (gi->this_in_reg)
|
|
info = (gpointer)mono_arch_context_get_int_reg (ctx, gi->this_reg);
|
|
else
|
|
info = *(gpointer*)(gpointer)((char*)mono_arch_context_get_int_reg (ctx, gi->this_reg) +
|
|
gi->this_offset);
|
|
}
|
|
|
|
method = jinfo_get_method (ji);
|
|
if (mono_method_get_context (method)->method_inst) {
|
|
/* A MonoMethodRuntimeGenericContext* */
|
|
return info;
|
|
} else if ((method->flags & METHOD_ATTRIBUTE_STATIC) || method->klass->valuetype) {
|
|
/* A MonoVTable* */
|
|
return info;
|
|
} else {
|
|
/* Avoid returning a managed object */
|
|
MonoObject *this_obj = (MonoObject *)info;
|
|
|
|
return this_obj->vtable;
|
|
}
|
|
}
|
|
|
|
/*
|
|
* generic_info is either a MonoMethodRuntimeGenericContext or a MonoVTable.
|
|
*/
|
|
static MonoGenericContext
|
|
get_generic_context_from_stack_frame (MonoJitInfo *ji, gpointer generic_info)
|
|
{
|
|
MonoGenericContext context = { NULL, NULL };
|
|
MonoClass *klass, *method_container_class;
|
|
MonoMethod *method;
|
|
|
|
g_assert (generic_info);
|
|
|
|
method = jinfo_get_method (ji);
|
|
g_assert (method->is_inflated);
|
|
if (mono_method_get_context (method)->method_inst) {
|
|
MonoMethodRuntimeGenericContext *mrgctx = (MonoMethodRuntimeGenericContext *)generic_info;
|
|
|
|
klass = mrgctx->class_vtable->klass;
|
|
context.method_inst = mrgctx->method_inst;
|
|
g_assert (context.method_inst);
|
|
} else {
|
|
MonoVTable *vtable = (MonoVTable *)generic_info;
|
|
|
|
klass = vtable->klass;
|
|
}
|
|
|
|
//g_assert (!method->klass->generic_container);
|
|
if (method->klass->generic_class)
|
|
method_container_class = method->klass->generic_class->container_class;
|
|
else
|
|
method_container_class = method->klass;
|
|
|
|
/* class might refer to a subclass of method's class */
|
|
while (!(klass == method->klass || (klass->generic_class && klass->generic_class->container_class == method_container_class))) {
|
|
klass = klass->parent;
|
|
g_assert (klass);
|
|
}
|
|
|
|
if (klass->generic_class || klass->generic_container)
|
|
context.class_inst = mini_class_get_context (klass)->class_inst;
|
|
|
|
if (klass->generic_class)
|
|
g_assert (mono_class_has_parent_and_ignore_generics (klass->generic_class->container_class, method_container_class));
|
|
else
|
|
g_assert (mono_class_has_parent_and_ignore_generics (klass, method_container_class));
|
|
|
|
return context;
|
|
}
|
|
|
|
static MonoMethod*
|
|
get_method_from_stack_frame (MonoJitInfo *ji, gpointer generic_info)
|
|
{
|
|
MonoError error;
|
|
MonoGenericContext context;
|
|
MonoMethod *method;
|
|
|
|
if (!ji->has_generic_jit_info || !mono_jit_info_get_generic_jit_info (ji)->has_this)
|
|
return jinfo_get_method (ji);
|
|
context = get_generic_context_from_stack_frame (ji, generic_info);
|
|
|
|
method = jinfo_get_method (ji);
|
|
method = mono_method_get_declaring_generic_method (method);
|
|
method = mono_class_inflate_generic_method_checked (method, &context, &error);
|
|
g_assert (mono_error_ok (&error)); /* FIXME don't swallow the error */
|
|
|
|
return method;
|
|
}
|
|
|
|
/**
|
|
* mono_exception_walk_native_trace:
|
|
* @ex: The exception object whose frames should be walked
|
|
* @func: callback to call for each stack frame
|
|
* @user_data: data passed to the callback
|
|
*
|
|
* This function walks the stacktrace of an exception. For
|
|
* each frame the callback function is called with the relevant info.
|
|
* The walk ends when no more stack frames are found or when the callback
|
|
* returns a TRUE value.
|
|
*/
|
|
|
|
gboolean
|
|
mono_exception_walk_trace (MonoException *ex, MonoExceptionFrameWalk func, gpointer user_data)
|
|
{
|
|
MonoDomain *domain = mono_domain_get ();
|
|
MonoArray *ta = ex->trace_ips;
|
|
int len, i;
|
|
|
|
if (ta == NULL)
|
|
return FALSE;
|
|
|
|
len = mono_array_length (ta) >> 1;
|
|
for (i = 0; i < len; i++) {
|
|
gpointer ip = mono_array_get (ta, gpointer, i * 2 + 0);
|
|
gpointer generic_info = mono_array_get (ta, gpointer, i * 2 + 1);
|
|
MonoJitInfo *ji = mono_jit_info_table_find (domain, (char *)ip);
|
|
|
|
if (ji == NULL) {
|
|
if (func (NULL, ip, 0, FALSE, user_data))
|
|
return TRUE;
|
|
} else {
|
|
MonoMethod *method = get_method_from_stack_frame (ji, generic_info);
|
|
if (func (method, ji->code_start, (char *) ip - (char *) ji->code_start, TRUE, user_data))
|
|
return TRUE;
|
|
}
|
|
}
|
|
|
|
return len > 0;
|
|
}
|
|
|
|
MonoArray *
|
|
ves_icall_get_trace (MonoException *exc, gint32 skip, MonoBoolean need_file_info)
|
|
{
|
|
MonoDomain *domain = mono_domain_get ();
|
|
MonoArray *res;
|
|
MonoArray *ta = exc->trace_ips;
|
|
MonoDebugSourceLocation *location;
|
|
int i, len;
|
|
|
|
if (ta == NULL) {
|
|
/* Exception is not thrown yet */
|
|
return mono_array_new (domain, mono_defaults.stack_frame_class, 0);
|
|
}
|
|
|
|
len = mono_array_length (ta) >> 1;
|
|
|
|
res = mono_array_new (domain, mono_defaults.stack_frame_class, len > skip ? len - skip : 0);
|
|
|
|
for (i = skip; i < len; i++) {
|
|
MonoJitInfo *ji;
|
|
MonoStackFrame *sf = (MonoStackFrame *)mono_object_new (domain, mono_defaults.stack_frame_class);
|
|
gpointer ip = mono_array_get (ta, gpointer, i * 2 + 0);
|
|
gpointer generic_info = mono_array_get (ta, gpointer, i * 2 + 1);
|
|
MonoMethod *method;
|
|
|
|
ji = mono_jit_info_table_find (domain, (char *)ip);
|
|
if (ji == NULL) {
|
|
/* Unmanaged frame */
|
|
mono_array_setref (res, i, sf);
|
|
continue;
|
|
}
|
|
|
|
g_assert (ji != NULL);
|
|
|
|
if (mono_llvm_only)
|
|
/* Can't resolve actual method */
|
|
method = jinfo_get_method (ji);
|
|
else
|
|
method = get_method_from_stack_frame (ji, generic_info);
|
|
if (jinfo_get_method (ji)->wrapper_type) {
|
|
char *s;
|
|
|
|
sf->method = NULL;
|
|
s = mono_method_get_name_full (method, TRUE, FALSE, MONO_TYPE_NAME_FORMAT_REFLECTION);
|
|
MONO_OBJECT_SETREF (sf, internal_method_name, mono_string_new (domain, s));
|
|
g_free (s);
|
|
}
|
|
else
|
|
MONO_OBJECT_SETREF (sf, method, mono_method_get_object (domain, method, NULL));
|
|
|
|
sf->method_index = ji->from_aot ? mono_aot_find_method_index (method) : 0xffffff;
|
|
sf->method_address = (gsize) ji->code_start;
|
|
sf->native_offset = (char *)ip - (char *)ji->code_start;
|
|
|
|
/*
|
|
* mono_debug_lookup_source_location() returns both the file / line number information
|
|
* and the IL offset. Note that computing the IL offset is already an expensive
|
|
* operation, so we shouldn't call this method twice.
|
|
*/
|
|
location = mono_debug_lookup_source_location (jinfo_get_method (ji), sf->native_offset, domain);
|
|
if (location) {
|
|
sf->il_offset = location->il_offset;
|
|
} else {
|
|
SeqPoint sp;
|
|
if (mono_find_prev_seq_point_for_native_offset (domain, jinfo_get_method (ji), sf->native_offset, NULL, &sp))
|
|
sf->il_offset = sp.il_offset;
|
|
else
|
|
sf->il_offset = -1;
|
|
}
|
|
|
|
if (need_file_info) {
|
|
if (location && location->source_file) {
|
|
MONO_OBJECT_SETREF (sf, filename, mono_string_new (domain, location->source_file));
|
|
sf->line = location->row;
|
|
sf->column = location->column;
|
|
} else {
|
|
sf->line = sf->column = 0;
|
|
sf->filename = NULL;
|
|
}
|
|
}
|
|
|
|
mono_debug_free_source_location (location);
|
|
mono_array_setref (res, i, sf);
|
|
}
|
|
|
|
return res;
|
|
}
|
|
|
|
static void
|
|
mono_runtime_walk_stack_with_ctx (MonoJitStackWalk func, MonoContext *start_ctx, MonoUnwindOptions unwind_options, void *user_data)
|
|
{
|
|
if (!start_ctx) {
|
|
MonoJitTlsData *jit_tls = (MonoJitTlsData *)mono_native_tls_get_value (mono_jit_tls_id);
|
|
if (jit_tls && jit_tls->orig_ex_ctx_set)
|
|
start_ctx = &jit_tls->orig_ex_ctx;
|
|
}
|
|
mono_walk_stack_with_ctx (func, start_ctx, unwind_options, user_data);
|
|
}
|
|
/**
|
|
* mono_walk_stack_with_ctx:
|
|
*
|
|
* Unwind the current thread starting at @start_ctx.
|
|
*
|
|
* If @start_ctx is null, we capture the current context.
|
|
*/
|
|
void
|
|
mono_walk_stack_with_ctx (MonoJitStackWalk func, MonoContext *start_ctx, MonoUnwindOptions unwind_options, void *user_data)
|
|
{
|
|
MonoContext extra_ctx;
|
|
MonoThreadInfo *thread = mono_thread_info_current_unchecked ();
|
|
MONO_ARCH_CONTEXT_DEF
|
|
|
|
if (!thread || !thread->jit_data)
|
|
return;
|
|
|
|
if (!start_ctx) {
|
|
mono_arch_flush_register_windows ();
|
|
|
|
#ifdef MONO_INIT_CONTEXT_FROM_CURRENT
|
|
MONO_INIT_CONTEXT_FROM_CURRENT (&extra_ctx);
|
|
#else
|
|
MONO_INIT_CONTEXT_FROM_FUNC (&extra_ctx, mono_walk_stack_with_ctx);
|
|
#endif
|
|
start_ctx = &extra_ctx;
|
|
}
|
|
|
|
mono_walk_stack_full (func, start_ctx, mono_domain_get (), (MonoJitTlsData *)thread->jit_data, mono_get_lmf (), unwind_options, user_data);
|
|
}
|
|
|
|
/**
|
|
* mono_walk_stack_with_state:
|
|
*
|
|
* Unwind a thread described by @state.
|
|
*
|
|
* State must be valid (state->valid == TRUE).
|
|
*
|
|
* If you are using this function to unwind another thread, make sure it is suspended.
|
|
*
|
|
* If @state is null, we capture the current context.
|
|
*/
|
|
void
|
|
mono_walk_stack_with_state (MonoJitStackWalk func, MonoThreadUnwindState *state, MonoUnwindOptions unwind_options, void *user_data)
|
|
{
|
|
MonoThreadUnwindState extra_state;
|
|
if (!state) {
|
|
g_assert (!mono_thread_info_is_async_context ());
|
|
if (!mono_thread_state_init_from_current (&extra_state))
|
|
return;
|
|
state = &extra_state;
|
|
}
|
|
|
|
g_assert (state->valid);
|
|
|
|
if (!state->unwind_data [MONO_UNWIND_DATA_DOMAIN])
|
|
/* Not attached */
|
|
return;
|
|
|
|
mono_walk_stack_full (func,
|
|
&state->ctx,
|
|
(MonoDomain *)state->unwind_data [MONO_UNWIND_DATA_DOMAIN],
|
|
(MonoJitTlsData *)state->unwind_data [MONO_UNWIND_DATA_JIT_TLS],
|
|
(MonoLMF *)state->unwind_data [MONO_UNWIND_DATA_LMF],
|
|
unwind_options, user_data);
|
|
}
|
|
|
|
void
|
|
mono_walk_stack (MonoJitStackWalk func, MonoUnwindOptions options, void *user_data)
|
|
{
|
|
MonoThreadUnwindState state;
|
|
if (!mono_thread_state_init_from_current (&state))
|
|
return;
|
|
mono_walk_stack_with_state (func, &state, options, user_data);
|
|
}
|
|
|
|
/**
|
|
* mono_walk_stack_full:
|
|
* @func: callback to call for each stack frame
|
|
* @domain: starting appdomain, can be NULL to use the current domain
|
|
* @unwind_options: what extra information the unwinder should gather
|
|
* @start_ctx: starting state of the stack walk, can be NULL.
|
|
* @thread: the thread whose stack to walk, can be NULL to use the current thread
|
|
* @lmf: the LMF of @thread, can be NULL to use the LMF of the current thread
|
|
* @user_data: data passed to the callback
|
|
*
|
|
* This function walks the stack of a thread, starting from the state
|
|
* represented by start_ctx. For each frame the callback
|
|
* function is called with the relevant info. The walk ends when no more
|
|
* managed stack frames are found or when the callback returns a TRUE value.
|
|
*/
|
|
static void
|
|
mono_walk_stack_full (MonoJitStackWalk func, MonoContext *start_ctx, MonoDomain *domain, MonoJitTlsData *jit_tls, MonoLMF *lmf, MonoUnwindOptions unwind_options, gpointer user_data)
|
|
{
|
|
gint il_offset, i;
|
|
MonoContext ctx, new_ctx;
|
|
StackFrameInfo frame;
|
|
gboolean res;
|
|
mgreg_t *reg_locations [MONO_MAX_IREGS];
|
|
mgreg_t *new_reg_locations [MONO_MAX_IREGS];
|
|
gboolean get_reg_locations = unwind_options & MONO_UNWIND_REG_LOCATIONS;
|
|
gboolean async = mono_thread_info_is_async_context ();
|
|
|
|
if (mono_llvm_only) {
|
|
GSList *l, *ips;
|
|
|
|
if (async)
|
|
return;
|
|
|
|
ips = get_unwind_backtrace ();
|
|
for (l = ips; l; l = l->next) {
|
|
guint8 *ip = (guint8*)l->data;
|
|
memset (&frame, 0, sizeof (StackFrameInfo));
|
|
frame.ji = mini_jit_info_table_find (domain, (char*)ip, &frame.domain);
|
|
if (!frame.ji || frame.ji->is_trampoline)
|
|
continue;
|
|
frame.type = FRAME_TYPE_MANAGED;
|
|
frame.method = jinfo_get_method (frame.ji);
|
|
// FIXME: Cannot lookup the actual method
|
|
frame.actual_method = frame.method;
|
|
if (frame.type == FRAME_TYPE_MANAGED) {
|
|
if (!frame.method->wrapper_type || frame.method->wrapper_type == MONO_WRAPPER_DYNAMIC_METHOD)
|
|
frame.managed = TRUE;
|
|
}
|
|
frame.native_offset = ip - (guint8*)frame.ji->code_start;
|
|
frame.il_offset = -1;
|
|
|
|
if (func (&frame, NULL, user_data))
|
|
break;
|
|
}
|
|
g_free (ips);
|
|
return;
|
|
}
|
|
|
|
g_assert (start_ctx);
|
|
g_assert (domain);
|
|
g_assert (jit_tls);
|
|
/*The LMF will be null if the target have no managed frames.*/
|
|
/* g_assert (lmf); */
|
|
|
|
if (async)
|
|
g_assert (unwind_options == MONO_UNWIND_NONE);
|
|
|
|
memcpy (&ctx, start_ctx, sizeof (MonoContext));
|
|
memset (reg_locations, 0, sizeof (reg_locations));
|
|
|
|
while (MONO_CONTEXT_GET_SP (&ctx) < jit_tls->end_of_stack) {
|
|
frame.lmf = lmf;
|
|
res = mono_find_jit_info_ext (domain, jit_tls, NULL, &ctx, &new_ctx, NULL, &lmf, get_reg_locations ? new_reg_locations : NULL, &frame);
|
|
if (!res)
|
|
return;
|
|
|
|
if ((unwind_options & MONO_UNWIND_LOOKUP_IL_OFFSET) && frame.ji && !frame.ji->is_trampoline) {
|
|
MonoDebugSourceLocation *source;
|
|
|
|
source = mono_debug_lookup_source_location (jinfo_get_method (frame.ji), frame.native_offset, domain);
|
|
if (source) {
|
|
il_offset = source->il_offset;
|
|
} else {
|
|
SeqPoint sp;
|
|
if (mono_find_prev_seq_point_for_native_offset (domain, jinfo_get_method (frame.ji), frame.native_offset, NULL, &sp))
|
|
il_offset = sp.il_offset;
|
|
else
|
|
il_offset = -1;
|
|
}
|
|
mono_debug_free_source_location (source);
|
|
} else
|
|
il_offset = -1;
|
|
|
|
frame.il_offset = il_offset;
|
|
|
|
if ((unwind_options & MONO_UNWIND_LOOKUP_ACTUAL_METHOD) && frame.ji && !frame.ji->is_trampoline) {
|
|
frame.actual_method = get_method_from_stack_frame (frame.ji, get_generic_info_from_stack_frame (frame.ji, &ctx));
|
|
} else {
|
|
frame.actual_method = frame.method;
|
|
}
|
|
|
|
if (get_reg_locations)
|
|
frame.reg_locations = reg_locations;
|
|
|
|
if (func (&frame, &ctx, user_data))
|
|
return;
|
|
|
|
if (get_reg_locations) {
|
|
for (i = 0; i < MONO_MAX_IREGS; ++i)
|
|
if (new_reg_locations [i])
|
|
reg_locations [i] = new_reg_locations [i];
|
|
}
|
|
|
|
ctx = new_ctx;
|
|
}
|
|
}
|
|
|
|
MonoBoolean
|
|
ves_icall_get_frame_info (gint32 skip, MonoBoolean need_file_info,
|
|
MonoReflectionMethod **method,
|
|
gint32 *iloffset, gint32 *native_offset,
|
|
MonoString **file, gint32 *line, gint32 *column)
|
|
{
|
|
MonoDomain *domain = mono_domain_get ();
|
|
MonoJitTlsData *jit_tls = (MonoJitTlsData *)mono_native_tls_get_value (mono_jit_tls_id);
|
|
MonoLMF *lmf = mono_get_lmf ();
|
|
MonoJitInfo *ji = NULL;
|
|
MonoContext ctx, new_ctx;
|
|
MonoDebugSourceLocation *location;
|
|
MonoMethod *jmethod = NULL, *actual_method;
|
|
StackFrameInfo frame;
|
|
gboolean res;
|
|
|
|
MONO_ARCH_CONTEXT_DEF;
|
|
|
|
if (mono_llvm_only) {
|
|
GSList *l, *ips;
|
|
MonoDomain *frame_domain;
|
|
guint8 *frame_ip = NULL;
|
|
|
|
/* FIXME: Generalize this code with an interface which returns an array of StackFrame structures */
|
|
jmethod = NULL;
|
|
ips = get_unwind_backtrace ();
|
|
for (l = ips; l && skip >= 0; l = l->next) {
|
|
guint8 *ip = (guint8*)l->data;
|
|
|
|
frame_ip = ip;
|
|
|
|
ji = mini_jit_info_table_find (mono_domain_get (), (char*)ip, &frame_domain);
|
|
if (!ji || ji->is_trampoline)
|
|
continue;
|
|
|
|
/* The skip count passed by the caller depends on us not filtering out MANAGED_TO_NATIVE */
|
|
jmethod = jinfo_get_method (ji);
|
|
if (jmethod->wrapper_type != MONO_WRAPPER_NONE && jmethod->wrapper_type != MONO_WRAPPER_DYNAMIC_METHOD && jmethod->wrapper_type != MONO_WRAPPER_MANAGED_TO_NATIVE)
|
|
continue;
|
|
skip--;
|
|
}
|
|
g_slist_free (ips);
|
|
if (!jmethod || !l)
|
|
return FALSE;
|
|
/* No way to resolve generic instances */
|
|
actual_method = jmethod;
|
|
*native_offset = frame_ip - (guint8*)ji->code_start;
|
|
} else {
|
|
mono_arch_flush_register_windows ();
|
|
|
|
#ifdef MONO_INIT_CONTEXT_FROM_CURRENT
|
|
MONO_INIT_CONTEXT_FROM_CURRENT (&ctx);
|
|
#else
|
|
MONO_INIT_CONTEXT_FROM_FUNC (&ctx, ves_icall_get_frame_info);
|
|
#endif
|
|
|
|
new_ctx = ctx;
|
|
do {
|
|
ctx = new_ctx;
|
|
res = mono_find_jit_info_ext (domain, jit_tls, NULL, &ctx, &new_ctx, NULL, &lmf, NULL, &frame);
|
|
if (!res)
|
|
return FALSE;
|
|
|
|
if (frame.type == FRAME_TYPE_MANAGED_TO_NATIVE ||
|
|
frame.type == FRAME_TYPE_DEBUGGER_INVOKE ||
|
|
frame.type == FRAME_TYPE_TRAMPOLINE)
|
|
continue;
|
|
|
|
ji = frame.ji;
|
|
*native_offset = frame.native_offset;
|
|
|
|
/* The skip count passed by the caller depends on us not filtering out MANAGED_TO_NATIVE */
|
|
jmethod = jinfo_get_method (ji);
|
|
if (jmethod->wrapper_type != MONO_WRAPPER_NONE && jmethod->wrapper_type != MONO_WRAPPER_DYNAMIC_METHOD && jmethod->wrapper_type != MONO_WRAPPER_MANAGED_TO_NATIVE)
|
|
continue;
|
|
skip--;
|
|
} while (skip >= 0);
|
|
|
|
actual_method = get_method_from_stack_frame (ji, get_generic_info_from_stack_frame (ji, &ctx));
|
|
}
|
|
|
|
mono_gc_wbarrier_generic_store (method, (MonoObject*) mono_method_get_object (domain, actual_method, NULL));
|
|
|
|
location = mono_debug_lookup_source_location (jmethod, *native_offset, domain);
|
|
if (location)
|
|
*iloffset = location->il_offset;
|
|
else
|
|
*iloffset = 0;
|
|
|
|
if (need_file_info) {
|
|
if (location) {
|
|
mono_gc_wbarrier_generic_store (file, (MonoObject*) mono_string_new (domain, location->source_file));
|
|
*line = location->row;
|
|
*column = location->column;
|
|
} else {
|
|
*file = NULL;
|
|
*line = *column = 0;
|
|
}
|
|
}
|
|
|
|
mono_debug_free_source_location (location);
|
|
|
|
return TRUE;
|
|
}
|
|
|
|
static MonoClass*
|
|
get_exception_catch_class (MonoJitExceptionInfo *ei, MonoJitInfo *ji, MonoContext *ctx)
|
|
{
|
|
MonoClass *catch_class = ei->data.catch_class;
|
|
MonoType *inflated_type;
|
|
MonoGenericContext context;
|
|
|
|
/*MonoJitExceptionInfo::data is an union used by filter and finally clauses too.*/
|
|
if (!catch_class || ei->flags != MONO_EXCEPTION_CLAUSE_NONE)
|
|
return NULL;
|
|
|
|
if (!ji->has_generic_jit_info || !mono_jit_info_get_generic_jit_info (ji)->has_this)
|
|
return catch_class;
|
|
context = get_generic_context_from_stack_frame (ji, get_generic_info_from_stack_frame (ji, ctx));
|
|
|
|
/* FIXME: we shouldn't inflate but instead put the
|
|
type in the rgctx and fetch it from there. It
|
|
might be a good idea to do this lazily, i.e. only
|
|
when the exception is actually thrown, so as not to
|
|
waste space for exception clauses which might never
|
|
be encountered. */
|
|
inflated_type = mono_class_inflate_generic_type (&catch_class->byval_arg, &context);
|
|
catch_class = mono_class_from_mono_type (inflated_type);
|
|
mono_metadata_free_type (inflated_type);
|
|
|
|
return catch_class;
|
|
}
|
|
|
|
/*
|
|
* mini_jit_info_table_find_ext:
|
|
*
|
|
* Same as mono_jit_info_table_find, but search all the domains of the current thread
|
|
* if ADDR is not found in DOMAIN. The domain where the method was found is stored into
|
|
* OUT_DOMAIN if it is not NULL.
|
|
*/
|
|
MonoJitInfo*
|
|
mini_jit_info_table_find_ext (MonoDomain *domain, char *addr, gboolean allow_trampolines, MonoDomain **out_domain)
|
|
{
|
|
MonoJitInfo *ji;
|
|
MonoInternalThread *t = mono_thread_internal_current ();
|
|
gpointer *refs;
|
|
|
|
if (out_domain)
|
|
*out_domain = NULL;
|
|
|
|
ji = mono_jit_info_table_find_internal (domain, addr, TRUE, allow_trampolines);
|
|
if (ji) {
|
|
if (out_domain)
|
|
*out_domain = domain;
|
|
return ji;
|
|
}
|
|
|
|
/* maybe it is shared code, so we also search in the root domain */
|
|
if (domain != mono_get_root_domain ()) {
|
|
ji = mono_jit_info_table_find_internal (mono_get_root_domain (), addr, TRUE, allow_trampolines);
|
|
if (ji) {
|
|
if (out_domain)
|
|
*out_domain = mono_get_root_domain ();
|
|
return ji;
|
|
}
|
|
}
|
|
|
|
if (!t)
|
|
return NULL;
|
|
|
|
refs = (gpointer *)((t->appdomain_refs) ? *(gpointer *) t->appdomain_refs : NULL);
|
|
for (; refs && *refs; refs++) {
|
|
if (*refs != domain && *refs != mono_get_root_domain ()) {
|
|
ji = mono_jit_info_table_find_internal ((MonoDomain*) *refs, addr, TRUE, allow_trampolines);
|
|
if (ji) {
|
|
if (out_domain)
|
|
*out_domain = (MonoDomain*) *refs;
|
|
return ji;
|
|
}
|
|
}
|
|
}
|
|
|
|
return NULL;
|
|
}
|
|
|
|
MonoJitInfo*
|
|
mini_jit_info_table_find (MonoDomain *domain, char *addr, MonoDomain **out_domain)
|
|
{
|
|
return mini_jit_info_table_find_ext (domain, addr, FALSE, out_domain);
|
|
}
|
|
|
|
/*
|
|
* wrap_non_exception_throws:
|
|
*
|
|
* Determine whenever M's assembly has a RuntimeCompatibilityAttribute with the
|
|
* WrapNonExceptionThrows flag set.
|
|
*/
|
|
static gboolean
|
|
wrap_non_exception_throws (MonoMethod *m)
|
|
{
|
|
MonoAssembly *ass = m->klass->image->assembly;
|
|
MonoCustomAttrInfo* attrs;
|
|
static MonoClass *klass;
|
|
int i;
|
|
gboolean val = FALSE;
|
|
|
|
g_assert (ass);
|
|
if (ass->wrap_non_exception_throws_inited)
|
|
return ass->wrap_non_exception_throws;
|
|
|
|
klass = mono_class_from_name_cached (mono_defaults.corlib, "System.Runtime.CompilerServices", "RuntimeCompatibilityAttribute");
|
|
|
|
attrs = mono_custom_attrs_from_assembly (ass);
|
|
if (attrs) {
|
|
for (i = 0; i < attrs->num_attrs; ++i) {
|
|
MonoCustomAttrEntry *attr = &attrs->attrs [i];
|
|
const gchar *p;
|
|
int num_named, named_type, name_len;
|
|
char *name;
|
|
|
|
if (!attr->ctor || attr->ctor->klass != klass)
|
|
continue;
|
|
/* Decode the RuntimeCompatibilityAttribute. See reflection.c */
|
|
p = (const char*)attr->data;
|
|
g_assert (read16 (p) == 0x0001);
|
|
p += 2;
|
|
num_named = read16 (p);
|
|
if (num_named != 1)
|
|
continue;
|
|
p += 2;
|
|
named_type = *p;
|
|
p ++;
|
|
/* data_type = *p; */
|
|
p ++;
|
|
/* Property */
|
|
if (named_type != 0x54)
|
|
continue;
|
|
name_len = mono_metadata_decode_blob_size (p, &p);
|
|
name = (char *)g_malloc (name_len + 1);
|
|
memcpy (name, p, name_len);
|
|
name [name_len] = 0;
|
|
p += name_len;
|
|
g_assert (!strcmp (name, "WrapNonExceptionThrows"));
|
|
g_free (name);
|
|
/* The value is a BOOLEAN */
|
|
val = *p;
|
|
}
|
|
mono_custom_attrs_free (attrs);
|
|
}
|
|
|
|
ass->wrap_non_exception_throws = val;
|
|
mono_memory_barrier ();
|
|
ass->wrap_non_exception_throws_inited = TRUE;
|
|
|
|
return val;
|
|
}
|
|
|
|
#ifndef MONO_ARCH_STACK_GROWS_UP
|
|
#define DOES_STACK_GROWS_UP 1
|
|
#else
|
|
#define DOES_STACK_GROWS_UP 0
|
|
#endif
|
|
|
|
#define MAX_UNMANAGED_BACKTRACE 128
|
|
static MonoArray*
|
|
build_native_trace (void)
|
|
{
|
|
/* This puppy only makes sense on mobile, IOW, ARM. */
|
|
#if defined (HAVE_BACKTRACE_SYMBOLS) && defined (TARGET_ARM)
|
|
MonoArray *res;
|
|
void *native_trace [MAX_UNMANAGED_BACKTRACE];
|
|
int size = backtrace (native_trace, MAX_UNMANAGED_BACKTRACE);
|
|
int i;
|
|
|
|
if (!size)
|
|
return NULL;
|
|
res = mono_array_new (mono_domain_get (), mono_defaults.int_class, size);
|
|
|
|
for (i = 0; i < size; i++)
|
|
mono_array_set (res, gpointer, i, native_trace [i]);
|
|
return res;
|
|
#else
|
|
return NULL;
|
|
#endif
|
|
}
|
|
|
|
static void
|
|
setup_stack_trace (MonoException *mono_ex, GSList *dynamic_methods, MonoArray *initial_trace_ips, GList **trace_ips)
|
|
{
|
|
if (mono_ex && !initial_trace_ips) {
|
|
*trace_ips = g_list_reverse (*trace_ips);
|
|
MONO_OBJECT_SETREF (mono_ex, trace_ips, mono_glist_to_array (*trace_ips, mono_defaults.int_class));
|
|
MONO_OBJECT_SETREF (mono_ex, native_trace_ips, build_native_trace ());
|
|
if (dynamic_methods) {
|
|
/* These methods could go away anytime, so save a reference to them in the exception object */
|
|
GSList *l;
|
|
MonoMList *list = NULL;
|
|
|
|
for (l = dynamic_methods; l; l = l->next) {
|
|
guint32 dis_link;
|
|
MonoDomain *domain = mono_domain_get ();
|
|
|
|
if (domain->method_to_dyn_method) {
|
|
mono_domain_lock (domain);
|
|
dis_link = (guint32)(size_t)g_hash_table_lookup (domain->method_to_dyn_method, l->data);
|
|
mono_domain_unlock (domain);
|
|
if (dis_link) {
|
|
MonoObject *o = mono_gchandle_get_target (dis_link);
|
|
if (o) {
|
|
list = mono_mlist_prepend (list, o);
|
|
}
|
|
}
|
|
}
|
|
}
|
|
|
|
MONO_OBJECT_SETREF (mono_ex, dynamic_methods, list);
|
|
}
|
|
}
|
|
g_list_free (*trace_ips);
|
|
*trace_ips = NULL;
|
|
}
|
|
|
|
/*
|
|
* mono_handle_exception_internal_first_pass:
|
|
*
|
|
* The first pass of exception handling. Unwind the stack until a catch clause which can catch
|
|
* OBJ is found. Run the index of the filter clause which caught the exception into
|
|
* OUT_FILTER_IDX. Return TRUE if the exception is caught, FALSE otherwise.
|
|
*/
|
|
static gboolean
|
|
mono_handle_exception_internal_first_pass (MonoContext *ctx, MonoObject *obj, gint32 *out_filter_idx, MonoJitInfo **out_ji, MonoJitInfo **out_prev_ji, MonoObject *non_exception)
|
|
{
|
|
MonoDomain *domain = mono_domain_get ();
|
|
MonoJitInfo *ji = NULL;
|
|
static int (*call_filter) (MonoContext *, gpointer) = NULL;
|
|
MonoJitTlsData *jit_tls = (MonoJitTlsData *)mono_native_tls_get_value (mono_jit_tls_id);
|
|
MonoLMF *lmf = mono_get_lmf ();
|
|
MonoArray *initial_trace_ips = NULL;
|
|
GList *trace_ips = NULL;
|
|
GSList *dynamic_methods = NULL;
|
|
MonoException *mono_ex;
|
|
gboolean stack_overflow = FALSE;
|
|
MonoContext initial_ctx;
|
|
MonoMethod *method;
|
|
int frame_count = 0;
|
|
gint32 filter_idx;
|
|
int i;
|
|
MonoObject *ex_obj;
|
|
|
|
g_assert (ctx != NULL);
|
|
|
|
if (obj == (MonoObject *)domain->stack_overflow_ex)
|
|
stack_overflow = TRUE;
|
|
|
|
mono_ex = (MonoException*)obj;
|
|
initial_trace_ips = mono_ex->trace_ips;
|
|
|
|
if (mono_object_isinst (obj, mono_defaults.exception_class)) {
|
|
mono_ex = (MonoException*)obj;
|
|
initial_trace_ips = mono_ex->trace_ips;
|
|
} else {
|
|
mono_ex = NULL;
|
|
}
|
|
|
|
if (!call_filter)
|
|
call_filter = (int (*) (MonoContext *, void *))mono_get_call_filter ();
|
|
|
|
g_assert (jit_tls->end_of_stack);
|
|
g_assert (jit_tls->abort_func);
|
|
|
|
if (out_filter_idx)
|
|
*out_filter_idx = -1;
|
|
if (out_ji)
|
|
*out_ji = NULL;
|
|
if (out_prev_ji)
|
|
*out_prev_ji = NULL;
|
|
filter_idx = 0;
|
|
initial_ctx = *ctx;
|
|
|
|
while (1) {
|
|
MonoContext new_ctx;
|
|
guint32 free_stack;
|
|
int clause_index_start = 0;
|
|
gboolean unwind_res = TRUE;
|
|
|
|
StackFrameInfo frame;
|
|
|
|
if (out_prev_ji)
|
|
*out_prev_ji = ji;
|
|
|
|
unwind_res = mono_find_jit_info_ext (domain, jit_tls, NULL, ctx, &new_ctx, NULL, &lmf, NULL, &frame);
|
|
if (unwind_res) {
|
|
if (frame.type == FRAME_TYPE_DEBUGGER_INVOKE ||
|
|
frame.type == FRAME_TYPE_MANAGED_TO_NATIVE ||
|
|
frame.type == FRAME_TYPE_TRAMPOLINE) {
|
|
*ctx = new_ctx;
|
|
continue;
|
|
}
|
|
g_assert (frame.type == FRAME_TYPE_MANAGED);
|
|
ji = frame.ji;
|
|
}
|
|
|
|
if (!unwind_res) {
|
|
setup_stack_trace (mono_ex, dynamic_methods, initial_trace_ips, &trace_ips);
|
|
g_slist_free (dynamic_methods);
|
|
return FALSE;
|
|
}
|
|
|
|
frame_count ++;
|
|
method = jinfo_get_method (ji);
|
|
//printf ("M: %s %d.\n", mono_method_full_name (method, TRUE), frame_count);
|
|
|
|
if (mini_get_debug_options ()->reverse_pinvoke_exceptions && method->wrapper_type == MONO_WRAPPER_NATIVE_TO_MANAGED) {
|
|
g_error ("A native frame was found while unwinding the stack after an exception.\n"
|
|
"The native frame called the managed method:\n%s\n",
|
|
mono_method_full_name (method, TRUE));
|
|
}
|
|
|
|
if (method->wrapper_type != MONO_WRAPPER_RUNTIME_INVOKE && mono_ex) {
|
|
/*
|
|
* Avoid overwriting the stack trace if the exception is
|
|
* rethrown. Also avoid giant stack traces during a stack
|
|
* overflow.
|
|
*/
|
|
if (!initial_trace_ips && (frame_count < 1000)) {
|
|
trace_ips = g_list_prepend (trace_ips, MONO_CONTEXT_GET_IP (ctx));
|
|
trace_ips = g_list_prepend (trace_ips,
|
|
get_generic_info_from_stack_frame (ji, ctx));
|
|
}
|
|
}
|
|
|
|
if (method->dynamic)
|
|
dynamic_methods = g_slist_prepend (dynamic_methods, method);
|
|
|
|
if (stack_overflow) {
|
|
if (DOES_STACK_GROWS_UP)
|
|
free_stack = (guint8*)(MONO_CONTEXT_GET_SP (ctx)) - (guint8*)(MONO_CONTEXT_GET_SP (&initial_ctx));
|
|
else
|
|
free_stack = (guint8*)(MONO_CONTEXT_GET_SP (&initial_ctx)) - (guint8*)(MONO_CONTEXT_GET_SP (ctx));
|
|
} else {
|
|
free_stack = 0xffffff;
|
|
}
|
|
|
|
for (i = clause_index_start; i < ji->num_clauses; i++) {
|
|
MonoJitExceptionInfo *ei = &ji->clauses [i];
|
|
gboolean filtered = FALSE;
|
|
|
|
/*
|
|
* During stack overflow, wait till the unwinding frees some stack
|
|
* space before running handlers/finalizers.
|
|
*/
|
|
if (free_stack <= (64 * 1024))
|
|
continue;
|
|
|
|
if (is_address_protected (ji, ei, MONO_CONTEXT_GET_IP (ctx))) {
|
|
/* catch block */
|
|
MonoClass *catch_class = get_exception_catch_class (ei, ji, ctx);
|
|
|
|
/*
|
|
* Have to unwrap RuntimeWrappedExceptions if the
|
|
* method's assembly doesn't have a RuntimeCompatibilityAttribute.
|
|
*/
|
|
if (non_exception && !wrap_non_exception_throws (method))
|
|
ex_obj = non_exception;
|
|
else
|
|
ex_obj = obj;
|
|
|
|
if (ei->flags == MONO_EXCEPTION_CLAUSE_FILTER) {
|
|
gboolean is_user_frame = method->wrapper_type == MONO_WRAPPER_NONE || method->wrapper_type == MONO_WRAPPER_DYNAMIC_METHOD;
|
|
#ifndef DISABLE_PERFCOUNTERS
|
|
mono_perfcounters->exceptions_filters++;
|
|
#endif
|
|
/*
|
|
Here's the thing, if this is a filter clause done by a wrapper like runtime invoke, we don't want to
|
|
trim the stackframe since if it returns FALSE we lose information.
|
|
|
|
FIXME Not 100% sure if it's a good idea even with user clauses.
|
|
*/
|
|
if (is_user_frame)
|
|
setup_stack_trace (mono_ex, dynamic_methods, initial_trace_ips, &trace_ips);
|
|
|
|
#ifdef MONO_CONTEXT_SET_LLVM_EXC_REG
|
|
if (ji->from_llvm)
|
|
MONO_CONTEXT_SET_LLVM_EXC_REG (ctx, ex_obj);
|
|
else
|
|
/* Can't pass the ex object in a register yet to filter clauses, because call_filter () might not support it */
|
|
*((gpointer *)(gpointer)((char *)MONO_CONTEXT_GET_BP (ctx) + ei->exvar_offset)) = ex_obj;
|
|
#else
|
|
g_assert (!ji->from_llvm);
|
|
/* store the exception object in bp + ei->exvar_offset */
|
|
*((gpointer *)(gpointer)((char *)MONO_CONTEXT_GET_BP (ctx) + ei->exvar_offset)) = ex_obj;
|
|
#endif
|
|
|
|
#ifdef MONO_CONTEXT_SET_LLVM_EH_SELECTOR_REG
|
|
/*
|
|
* Pass the original il clause index to the landing pad so it can
|
|
* branch to the landing pad associated with the il clause.
|
|
* This is needed because llvm compiled code assumes that the EH
|
|
* code always branches to the innermost landing pad.
|
|
*/
|
|
if (ji->from_llvm)
|
|
MONO_CONTEXT_SET_LLVM_EH_SELECTOR_REG (ctx, ei->clause_index);
|
|
#endif
|
|
|
|
mono_debugger_agent_begin_exception_filter (mono_ex, ctx, &initial_ctx);
|
|
filtered = call_filter (ctx, ei->data.filter);
|
|
mono_debugger_agent_end_exception_filter (mono_ex, ctx, &initial_ctx);
|
|
if (filtered && out_filter_idx)
|
|
*out_filter_idx = filter_idx;
|
|
if (out_ji)
|
|
*out_ji = ji;
|
|
filter_idx ++;
|
|
|
|
if (filtered) {
|
|
if (!is_user_frame)
|
|
setup_stack_trace (mono_ex, dynamic_methods, initial_trace_ips, &trace_ips);
|
|
g_slist_free (dynamic_methods);
|
|
/* mono_debugger_agent_handle_exception () needs this */
|
|
MONO_CONTEXT_SET_IP (ctx, ei->handler_start);
|
|
return TRUE;
|
|
}
|
|
}
|
|
|
|
if (ei->flags == MONO_EXCEPTION_CLAUSE_NONE && mono_object_isinst (ex_obj, catch_class)) {
|
|
setup_stack_trace (mono_ex, dynamic_methods, initial_trace_ips, &trace_ips);
|
|
g_slist_free (dynamic_methods);
|
|
|
|
if (out_ji)
|
|
*out_ji = ji;
|
|
|
|
/* mono_debugger_agent_handle_exception () needs this */
|
|
MONO_CONTEXT_SET_IP (ctx, ei->handler_start);
|
|
return TRUE;
|
|
}
|
|
}
|
|
}
|
|
|
|
*ctx = new_ctx;
|
|
}
|
|
|
|
g_assert_not_reached ();
|
|
}
|
|
|
|
/**
|
|
* mono_handle_exception_internal:
|
|
* @ctx: saved processor state
|
|
* @obj: the exception object
|
|
* @resume: whenever to resume unwinding based on the state in MonoJitTlsData.
|
|
*/
|
|
static gboolean
|
|
mono_handle_exception_internal (MonoContext *ctx, MonoObject *obj, gboolean resume, MonoJitInfo **out_ji)
|
|
{
|
|
MonoDomain *domain = mono_domain_get ();
|
|
MonoJitInfo *ji, *prev_ji;
|
|
static int (*call_filter) (MonoContext *, gpointer) = NULL;
|
|
MonoJitTlsData *jit_tls = (MonoJitTlsData *)mono_native_tls_get_value (mono_jit_tls_id);
|
|
MonoLMF *lmf = mono_get_lmf ();
|
|
MonoException *mono_ex;
|
|
gboolean stack_overflow = FALSE;
|
|
MonoContext initial_ctx;
|
|
MonoMethod *method;
|
|
int frame_count = 0;
|
|
gint32 filter_idx, first_filter_idx = 0;
|
|
int i;
|
|
MonoObject *ex_obj;
|
|
MonoObject *non_exception = NULL;
|
|
|
|
g_assert (ctx != NULL);
|
|
if (!obj) {
|
|
MonoException *ex = mono_get_exception_null_reference ();
|
|
MONO_OBJECT_SETREF (ex, message, mono_string_new (domain, "Object reference not set to an instance of an object"));
|
|
obj = (MonoObject *)ex;
|
|
}
|
|
|
|
/*
|
|
* Allocate a new exception object instead of the preconstructed ones.
|
|
*/
|
|
if (obj == (MonoObject *)domain->stack_overflow_ex) {
|
|
/*
|
|
* It is not a good idea to try and put even more pressure on the little stack available.
|
|
* obj = mono_get_exception_stack_overflow ();
|
|
*/
|
|
stack_overflow = TRUE;
|
|
}
|
|
else if (obj == (MonoObject *)domain->null_reference_ex) {
|
|
obj = (MonoObject *)mono_get_exception_null_reference ();
|
|
}
|
|
|
|
if (!mono_object_isinst (obj, mono_defaults.exception_class)) {
|
|
non_exception = obj;
|
|
obj = (MonoObject *)mono_get_exception_runtime_wrapped (obj);
|
|
}
|
|
|
|
mono_ex = (MonoException*)obj;
|
|
|
|
if (mini_get_debug_options ()->suspend_on_exception) {
|
|
mono_runtime_printf_err ("Exception thrown, suspending...");
|
|
while (1)
|
|
;
|
|
}
|
|
|
|
if (mono_object_isinst (obj, mono_defaults.exception_class)) {
|
|
mono_ex = (MonoException*)obj;
|
|
} else {
|
|
mono_ex = NULL;
|
|
}
|
|
|
|
if (mono_ex && jit_tls->class_cast_from) {
|
|
if (!strcmp (mono_ex->object.vtable->klass->name, "InvalidCastException")) {
|
|
char *from_name = mono_type_get_full_name (jit_tls->class_cast_from);
|
|
char *to_name = mono_type_get_full_name (jit_tls->class_cast_to);
|
|
char *msg = g_strdup_printf ("Unable to cast object of type '%s' to type '%s'.", from_name, to_name);
|
|
mono_ex->message = mono_string_new (domain, msg);
|
|
g_free (from_name);
|
|
g_free (to_name);
|
|
g_free (msg);
|
|
}
|
|
if (!strcmp (mono_ex->object.vtable->klass->name, "ArrayTypeMismatchException")) {
|
|
char *from_name = mono_type_get_full_name (jit_tls->class_cast_from);
|
|
char *to_name = mono_type_get_full_name (jit_tls->class_cast_to);
|
|
char *msg = g_strdup_printf ("Source array of type '%s' cannot be cast to destination array type '%s'.", from_name, to_name);
|
|
mono_ex->message = mono_string_new (domain, msg);
|
|
g_free (from_name);
|
|
g_free (to_name);
|
|
g_free (msg);
|
|
}
|
|
}
|
|
|
|
if (!call_filter)
|
|
call_filter = (int (*)(MonoContext *, void*))mono_get_call_filter ();
|
|
|
|
g_assert (jit_tls->end_of_stack);
|
|
g_assert (jit_tls->abort_func);
|
|
|
|
/*
|
|
* We set orig_ex_ctx_set to TRUE/FALSE around profiler calls to make sure it doesn't
|
|
* end up being TRUE on any code path.
|
|
*/
|
|
memcpy (&jit_tls->orig_ex_ctx, ctx, sizeof (MonoContext));
|
|
|
|
if (!resume) {
|
|
gboolean res;
|
|
|
|
MonoContext ctx_cp = *ctx;
|
|
if (mono_trace_is_enabled ()) {
|
|
MonoMethod *system_exception_get_message = mono_class_get_method_from_name (mono_defaults.exception_class, "get_Message", 0);
|
|
MonoMethod *get_message = system_exception_get_message == NULL ? NULL : mono_object_get_virtual_method (obj, system_exception_get_message);
|
|
MonoObject *message;
|
|
const char *type_name = mono_class_get_name (mono_object_class (mono_ex));
|
|
char *msg = NULL;
|
|
MonoObject *exc = NULL;
|
|
if (get_message == NULL) {
|
|
message = NULL;
|
|
} else if (!strcmp (type_name, "OutOfMemoryException") || !strcmp (type_name, "StackOverflowException")) {
|
|
message = NULL;
|
|
msg = g_strdup_printf ("(No exception message for: %s)\n", type_name);
|
|
} else {
|
|
message = mono_runtime_invoke (get_message, obj, NULL, &exc);
|
|
|
|
}
|
|
if (msg == NULL) {
|
|
msg = message ? mono_string_to_utf8 ((MonoString *) message) : g_strdup ("(System.Exception.Message property not available)");
|
|
}
|
|
g_print ("[%p:] EXCEPTION handling: %s.%s: %s\n", (void*)mono_native_thread_id_get (), mono_object_class (obj)->name_space, mono_object_class (obj)->name, msg);
|
|
g_free (msg);
|
|
if (mono_ex && mono_trace_eval_exception (mono_object_class (mono_ex)))
|
|
mono_print_thread_dump_from_ctx (ctx);
|
|
}
|
|
jit_tls->orig_ex_ctx_set = TRUE;
|
|
mono_profiler_exception_thrown (obj);
|
|
jit_tls->orig_ex_ctx_set = FALSE;
|
|
|
|
res = mono_handle_exception_internal_first_pass (&ctx_cp, obj, &first_filter_idx, &ji, &prev_ji, non_exception);
|
|
|
|
if (!res) {
|
|
if (mini_get_debug_options ()->break_on_exc)
|
|
G_BREAKPOINT ();
|
|
mono_debugger_agent_handle_exception ((MonoException *)obj, ctx, NULL);
|
|
|
|
if (mini_get_debug_options ()->suspend_on_unhandled) {
|
|
mono_runtime_printf_err ("Unhandled exception, suspending...");
|
|
while (1)
|
|
;
|
|
}
|
|
|
|
// FIXME: This runs managed code so it might cause another stack overflow when
|
|
// we are handling a stack overflow
|
|
mono_unhandled_exception (obj);
|
|
} else {
|
|
gboolean unhandled = FALSE;
|
|
|
|
/*
|
|
* The exceptions caught by the mono_runtime_invoke () calls
|
|
* in the threadpool needs to be treated as unhandled (#669836).
|
|
*
|
|
* FIXME: The check below is hackish, but its hard to distinguish
|
|
* these runtime invoke calls from others in the runtime.
|
|
*/
|
|
if (ji && jinfo_get_method (ji)->wrapper_type == MONO_WRAPPER_RUNTIME_INVOKE) {
|
|
if (prev_ji && jinfo_get_method (prev_ji) == mono_defaults.threadpool_perform_wait_callback_method)
|
|
unhandled = TRUE;
|
|
}
|
|
|
|
if (unhandled)
|
|
mono_debugger_agent_handle_exception ((MonoException *)obj, ctx, NULL);
|
|
else
|
|
mono_debugger_agent_handle_exception ((MonoException *)obj, ctx, &ctx_cp);
|
|
}
|
|
}
|
|
|
|
if (out_ji)
|
|
*out_ji = NULL;
|
|
filter_idx = 0;
|
|
initial_ctx = *ctx;
|
|
|
|
while (1) {
|
|
MonoContext new_ctx;
|
|
guint32 free_stack;
|
|
int clause_index_start = 0;
|
|
gboolean unwind_res = TRUE;
|
|
|
|
if (resume) {
|
|
resume = FALSE;
|
|
ji = jit_tls->resume_state.ji;
|
|
new_ctx = jit_tls->resume_state.new_ctx;
|
|
clause_index_start = jit_tls->resume_state.clause_index;
|
|
lmf = jit_tls->resume_state.lmf;
|
|
first_filter_idx = jit_tls->resume_state.first_filter_idx;
|
|
filter_idx = jit_tls->resume_state.filter_idx;
|
|
} else {
|
|
StackFrameInfo frame;
|
|
|
|
unwind_res = mono_find_jit_info_ext (domain, jit_tls, NULL, ctx, &new_ctx, NULL, &lmf, NULL, &frame);
|
|
if (unwind_res) {
|
|
if (frame.type == FRAME_TYPE_DEBUGGER_INVOKE ||
|
|
frame.type == FRAME_TYPE_MANAGED_TO_NATIVE ||
|
|
frame.type == FRAME_TYPE_TRAMPOLINE) {
|
|
*ctx = new_ctx;
|
|
continue;
|
|
}
|
|
g_assert (frame.type == FRAME_TYPE_MANAGED);
|
|
ji = frame.ji;
|
|
}
|
|
}
|
|
|
|
if (!unwind_res) {
|
|
*(mono_get_lmf_addr ()) = lmf;
|
|
|
|
jit_tls->abort_func (obj);
|
|
g_assert_not_reached ();
|
|
}
|
|
|
|
method = jinfo_get_method (ji);
|
|
frame_count ++;
|
|
//printf ("M: %s %d.\n", mono_method_full_name (method, TRUE), frame_count);
|
|
|
|
if (stack_overflow) {
|
|
if (DOES_STACK_GROWS_UP)
|
|
free_stack = (guint8*)(MONO_CONTEXT_GET_SP (ctx)) - (guint8*)(MONO_CONTEXT_GET_SP (&initial_ctx));
|
|
else
|
|
free_stack = (guint8*)(MONO_CONTEXT_GET_SP (&initial_ctx)) - (guint8*)(MONO_CONTEXT_GET_SP (ctx));
|
|
} else {
|
|
free_stack = 0xffffff;
|
|
}
|
|
|
|
for (i = clause_index_start; i < ji->num_clauses; i++) {
|
|
MonoJitExceptionInfo *ei = &ji->clauses [i];
|
|
gboolean filtered = FALSE;
|
|
|
|
/*
|
|
* During stack overflow, wait till the unwinding frees some stack
|
|
* space before running handlers/finalizers.
|
|
*/
|
|
if (free_stack <= (64 * 1024))
|
|
continue;
|
|
|
|
if (is_address_protected (ji, ei, MONO_CONTEXT_GET_IP (ctx))) {
|
|
/* catch block */
|
|
MonoClass *catch_class = get_exception_catch_class (ei, ji, ctx);
|
|
|
|
/*
|
|
* Have to unwrap RuntimeWrappedExceptions if the
|
|
* method's assembly doesn't have a RuntimeCompatibilityAttribute.
|
|
*/
|
|
if (non_exception && !wrap_non_exception_throws (method))
|
|
ex_obj = non_exception;
|
|
else
|
|
ex_obj = obj;
|
|
|
|
if (((ei->flags == MONO_EXCEPTION_CLAUSE_NONE) || (ei->flags == MONO_EXCEPTION_CLAUSE_FILTER))) {
|
|
#ifdef MONO_CONTEXT_SET_LLVM_EXC_REG
|
|
MONO_CONTEXT_SET_LLVM_EXC_REG (ctx, ex_obj);
|
|
#else
|
|
g_assert (!ji->from_llvm);
|
|
/* store the exception object in bp + ei->exvar_offset */
|
|
*((gpointer *)(gpointer)((char *)MONO_CONTEXT_GET_BP (ctx) + ei->exvar_offset)) = ex_obj;
|
|
#endif
|
|
}
|
|
|
|
#ifdef MONO_CONTEXT_SET_LLVM_EH_SELECTOR_REG
|
|
if (ji->from_llvm)
|
|
MONO_CONTEXT_SET_LLVM_EH_SELECTOR_REG (ctx, ei->clause_index);
|
|
#endif
|
|
|
|
if (ei->flags == MONO_EXCEPTION_CLAUSE_FILTER) {
|
|
/*
|
|
* Filter clauses should only be run in the
|
|
* first pass of exception handling.
|
|
*/
|
|
filtered = (filter_idx == first_filter_idx);
|
|
filter_idx ++;
|
|
}
|
|
|
|
if ((ei->flags == MONO_EXCEPTION_CLAUSE_NONE &&
|
|
mono_object_isinst (ex_obj, catch_class)) || filtered) {
|
|
/*
|
|
* This guards against the situation that we abort a thread that is executing a finally clause
|
|
* that was called by the EH machinery. It won't have a guard trampoline installed, so we must
|
|
* check for this situation here and resume interruption if we are below the guarded block.
|
|
*/
|
|
if (G_UNLIKELY (jit_tls->handler_block_return_address)) {
|
|
gboolean is_outside = FALSE;
|
|
gpointer prot_bp = MONO_CONTEXT_GET_BP (&jit_tls->handler_block_context);
|
|
gpointer catch_bp = MONO_CONTEXT_GET_BP (ctx);
|
|
//FIXME make this stack direction aware
|
|
if (catch_bp > prot_bp) {
|
|
is_outside = TRUE;
|
|
} else if (catch_bp == prot_bp) {
|
|
/* Can be either try { try { } catch {} } finally {} or try { try { } finally {} } catch {}
|
|
* So we check if the catch handler_start is protected by the guarded handler protected region
|
|
*
|
|
* Assumptions:
|
|
* If there is an outstanding guarded_block return address, it means the current thread must be aborted.
|
|
* This is the only way to reach out the guarded block as other cases are handled by the trampoline.
|
|
* There aren't any further finally/fault handler blocks down the stack over this exception.
|
|
* This must be ensured by the code that installs the guard trampoline.
|
|
*/
|
|
g_assert (ji == mini_jit_info_table_find (domain, (char *)MONO_CONTEXT_GET_IP (&jit_tls->handler_block_context), NULL));
|
|
|
|
if (!is_address_protected (ji, jit_tls->handler_block, ei->handler_start)) {
|
|
is_outside = TRUE;
|
|
}
|
|
}
|
|
if (is_outside) {
|
|
jit_tls->handler_block_return_address = NULL;
|
|
jit_tls->handler_block = NULL;
|
|
mono_thread_resume_interruption (); /*We ignore the exception here, it will be raised later*/
|
|
}
|
|
}
|
|
|
|
if (mono_trace_is_enabled () && mono_trace_eval (method))
|
|
g_print ("EXCEPTION: catch found at clause %d of %s\n", i, mono_method_full_name (method, TRUE));
|
|
jit_tls->orig_ex_ctx_set = TRUE;
|
|
mono_profiler_exception_clause_handler (method, ei->flags, i);
|
|
jit_tls->orig_ex_ctx_set = FALSE;
|
|
MONO_CONTEXT_SET_IP (ctx, ei->handler_start);
|
|
mono_set_lmf (lmf);
|
|
#ifndef DISABLE_PERFCOUNTERS
|
|
mono_perfcounters->exceptions_depth += frame_count;
|
|
#endif
|
|
if (obj == (MonoObject *)domain->stack_overflow_ex)
|
|
jit_tls->handling_stack_ovf = FALSE;
|
|
|
|
return 0;
|
|
}
|
|
if (ei->flags == MONO_EXCEPTION_CLAUSE_FAULT) {
|
|
if (mono_trace_is_enabled () && mono_trace_eval (method))
|
|
g_print ("EXCEPTION: fault clause %d of %s\n", i, mono_method_full_name (method, TRUE));
|
|
jit_tls->orig_ex_ctx_set = TRUE;
|
|
mono_profiler_exception_clause_handler (method, ei->flags, i);
|
|
jit_tls->orig_ex_ctx_set = FALSE;
|
|
call_filter (ctx, ei->handler_start);
|
|
}
|
|
if (ei->flags == MONO_EXCEPTION_CLAUSE_FINALLY) {
|
|
if (mono_trace_is_enabled () && mono_trace_eval (method))
|
|
g_print ("EXCEPTION: finally clause %d of %s\n", i, mono_method_full_name (method, TRUE));
|
|
jit_tls->orig_ex_ctx_set = TRUE;
|
|
mono_profiler_exception_clause_handler (method, ei->flags, i);
|
|
jit_tls->orig_ex_ctx_set = FALSE;
|
|
#ifndef DISABLE_PERFCOUNTERS
|
|
mono_perfcounters->exceptions_finallys++;
|
|
#endif
|
|
mono_set_lmf (lmf);
|
|
if (ji->from_llvm) {
|
|
/*
|
|
* LLVM compiled finally handlers follow the design
|
|
* of the c++ ehabi, i.e. they call a resume function
|
|
* at the end instead of returning to the caller.
|
|
* So save the exception handling state,
|
|
* mono_resume_unwind () will call us again to continue
|
|
* the unwinding.
|
|
*/
|
|
jit_tls->resume_state.ex_obj = obj;
|
|
jit_tls->resume_state.ji = ji;
|
|
jit_tls->resume_state.clause_index = i + 1;
|
|
jit_tls->resume_state.ctx = *ctx;
|
|
jit_tls->resume_state.new_ctx = new_ctx;
|
|
jit_tls->resume_state.lmf = lmf;
|
|
jit_tls->resume_state.first_filter_idx = first_filter_idx;
|
|
jit_tls->resume_state.filter_idx = filter_idx;
|
|
MONO_CONTEXT_SET_IP (ctx, ei->handler_start);
|
|
return 0;
|
|
} else {
|
|
call_filter (ctx, ei->handler_start);
|
|
}
|
|
}
|
|
}
|
|
}
|
|
|
|
jit_tls->orig_ex_ctx_set = TRUE;
|
|
mono_profiler_exception_method_leave (method);
|
|
jit_tls->orig_ex_ctx_set = FALSE;
|
|
|
|
*ctx = new_ctx;
|
|
}
|
|
|
|
g_assert_not_reached ();
|
|
}
|
|
|
|
/**
|
|
* mono_debugger_run_finally:
|
|
* @start_ctx: saved processor state
|
|
*
|
|
* This method is called by the Mono Debugger to call all `finally' clauses of the
|
|
* current stack frame. It's used when the user issues a `return' command to make
|
|
* the current stack frame return. After returning from this method, the debugger
|
|
* unwinds the stack one frame and gives control back to the user.
|
|
*
|
|
* NOTE: This method is only used when running inside the Mono Debugger.
|
|
*/
|
|
void
|
|
mono_debugger_run_finally (MonoContext *start_ctx)
|
|
{
|
|
static int (*call_filter) (MonoContext *, gpointer) = NULL;
|
|
MonoDomain *domain = mono_domain_get ();
|
|
MonoJitTlsData *jit_tls = (MonoJitTlsData *)mono_native_tls_get_value (mono_jit_tls_id);
|
|
MonoLMF *lmf = mono_get_lmf ();
|
|
MonoContext ctx, new_ctx;
|
|
MonoJitInfo *ji, rji;
|
|
int i;
|
|
|
|
ctx = *start_ctx;
|
|
|
|
ji = mono_find_jit_info (domain, jit_tls, &rji, NULL, &ctx, &new_ctx, NULL, &lmf, NULL, NULL);
|
|
if (!ji || ji == (gpointer)-1)
|
|
return;
|
|
|
|
if (!call_filter)
|
|
call_filter = (int (*)(MonoContext *, void *))mono_get_call_filter ();
|
|
|
|
for (i = 0; i < ji->num_clauses; i++) {
|
|
MonoJitExceptionInfo *ei = &ji->clauses [i];
|
|
|
|
if (is_address_protected (ji, ei, MONO_CONTEXT_GET_IP (&ctx)) &&
|
|
(ei->flags & MONO_EXCEPTION_CLAUSE_FINALLY)) {
|
|
call_filter (&ctx, ei->handler_start);
|
|
}
|
|
}
|
|
}
|
|
|
|
/**
|
|
* mono_handle_exception:
|
|
* @ctx: saved processor state
|
|
* @obj: the exception object
|
|
*/
|
|
gboolean
|
|
mono_handle_exception (MonoContext *ctx, MonoObject *obj)
|
|
{
|
|
#ifndef DISABLE_PERFCOUNTERS
|
|
mono_perfcounters->exceptions_thrown++;
|
|
#endif
|
|
|
|
return mono_handle_exception_internal (ctx, obj, FALSE, NULL);
|
|
}
|
|
|
|
#ifdef MONO_ARCH_SIGSEGV_ON_ALTSTACK
|
|
|
|
#ifndef MONO_ARCH_USE_SIGACTION
|
|
#error "Can't use sigaltstack without sigaction"
|
|
#endif
|
|
|
|
#define ALIGN_TO(val,align) ((((guint64)val) + ((align) - 1)) & ~((align) - 1))
|
|
|
|
void
|
|
mono_setup_altstack (MonoJitTlsData *tls)
|
|
{
|
|
size_t stsize = 0;
|
|
stack_t sa;
|
|
guint8 *staddr = NULL;
|
|
|
|
if (mono_running_on_valgrind ())
|
|
return;
|
|
|
|
mono_thread_info_get_stack_bounds (&staddr, &stsize);
|
|
|
|
g_assert (staddr);
|
|
|
|
tls->end_of_stack = staddr + stsize;
|
|
tls->stack_size = stsize;
|
|
|
|
/*g_print ("thread %p, stack_base: %p, stack_size: %d\n", (gpointer)pthread_self (), staddr, stsize);*/
|
|
|
|
tls->stack_ovf_guard_base = staddr + mono_pagesize ();
|
|
tls->stack_ovf_guard_size = ALIGN_TO (8 * 4096, mono_pagesize ());
|
|
|
|
g_assert ((guint8*)&sa >= (guint8*)tls->stack_ovf_guard_base + tls->stack_ovf_guard_size);
|
|
|
|
if (mono_mprotect (tls->stack_ovf_guard_base, tls->stack_ovf_guard_size, MONO_MMAP_NONE)) {
|
|
/* mprotect can fail for the main thread stack */
|
|
gpointer gaddr = mono_valloc (tls->stack_ovf_guard_base, tls->stack_ovf_guard_size, MONO_MMAP_NONE|MONO_MMAP_PRIVATE|MONO_MMAP_ANON|MONO_MMAP_FIXED);
|
|
g_assert (gaddr == tls->stack_ovf_guard_base);
|
|
tls->stack_ovf_valloced = TRUE;
|
|
}
|
|
|
|
/* Setup an alternate signal stack */
|
|
tls->signal_stack = mono_valloc (0, MONO_ARCH_SIGNAL_STACK_SIZE, MONO_MMAP_READ|MONO_MMAP_WRITE|MONO_MMAP_PRIVATE|MONO_MMAP_ANON);
|
|
tls->signal_stack_size = MONO_ARCH_SIGNAL_STACK_SIZE;
|
|
|
|
g_assert (tls->signal_stack);
|
|
|
|
sa.ss_sp = tls->signal_stack;
|
|
sa.ss_size = MONO_ARCH_SIGNAL_STACK_SIZE;
|
|
sa.ss_flags = 0;
|
|
g_assert (sigaltstack (&sa, NULL) == 0);
|
|
|
|
mono_gc_register_altstack ((char*)tls->stack_ovf_guard_base + tls->stack_ovf_guard_size, (char*)staddr + stsize - ((char*)tls->stack_ovf_guard_base + tls->stack_ovf_guard_size), tls->signal_stack, tls->signal_stack_size);
|
|
}
|
|
|
|
void
|
|
mono_free_altstack (MonoJitTlsData *tls)
|
|
{
|
|
stack_t sa;
|
|
int err;
|
|
|
|
sa.ss_sp = tls->signal_stack;
|
|
sa.ss_size = MONO_ARCH_SIGNAL_STACK_SIZE;
|
|
sa.ss_flags = SS_DISABLE;
|
|
err = sigaltstack (&sa, NULL);
|
|
g_assert (err == 0);
|
|
|
|
if (tls->signal_stack)
|
|
mono_vfree (tls->signal_stack, MONO_ARCH_SIGNAL_STACK_SIZE);
|
|
if (tls->stack_ovf_valloced)
|
|
mono_vfree (tls->stack_ovf_guard_base, tls->stack_ovf_guard_size);
|
|
else
|
|
mono_mprotect (tls->stack_ovf_guard_base, tls->stack_ovf_guard_size, MONO_MMAP_READ|MONO_MMAP_WRITE);
|
|
}
|
|
|
|
#else /* !MONO_ARCH_SIGSEGV_ON_ALTSTACK */
|
|
|
|
void
|
|
mono_setup_altstack (MonoJitTlsData *tls)
|
|
{
|
|
}
|
|
|
|
void
|
|
mono_free_altstack (MonoJitTlsData *tls)
|
|
{
|
|
}
|
|
|
|
#endif /* MONO_ARCH_SIGSEGV_ON_ALTSTACK */
|
|
|
|
static gboolean
|
|
try_restore_stack_protection (MonoJitTlsData *jit_tls, int extra_bytes)
|
|
{
|
|
gint32 unprotect_size = jit_tls->stack_ovf_guard_size;
|
|
/* we need to leave some room for throwing the exception */
|
|
while (unprotect_size >= 0 && (char*)jit_tls->stack_ovf_guard_base + unprotect_size > ((char*)&unprotect_size - extra_bytes))
|
|
unprotect_size -= mono_pagesize ();
|
|
/* at this point we could try and build a new domain->stack_overflow_ex, but only if there
|
|
* is sufficient stack
|
|
*/
|
|
//fprintf (stderr, "restoring stack protection: %p-%p (%d)\n", jit_tls->stack_ovf_guard_base, (char*)jit_tls->stack_ovf_guard_base + unprotect_size, unprotect_size);
|
|
if (unprotect_size)
|
|
mono_mprotect (jit_tls->stack_ovf_guard_base, unprotect_size, MONO_MMAP_NONE);
|
|
return unprotect_size == jit_tls->stack_ovf_guard_size;
|
|
}
|
|
|
|
static G_GNUC_UNUSED void
|
|
try_more_restore (void)
|
|
{
|
|
MonoJitTlsData *jit_tls = (MonoJitTlsData *)mono_native_tls_get_value (mono_jit_tls_id);
|
|
if (try_restore_stack_protection (jit_tls, 500))
|
|
jit_tls->restore_stack_prot = NULL;
|
|
}
|
|
|
|
static G_GNUC_UNUSED void
|
|
restore_stack_protection (void)
|
|
{
|
|
MonoJitTlsData *jit_tls = (MonoJitTlsData *)mono_native_tls_get_value (mono_jit_tls_id);
|
|
MonoException *ex = mono_domain_get ()->stack_overflow_ex;
|
|
/* if we can't restore the stack protection, keep a callback installed so
|
|
* we'll try to restore as much stack as we can at each return from unmanaged
|
|
* code.
|
|
*/
|
|
if (try_restore_stack_protection (jit_tls, 4096))
|
|
jit_tls->restore_stack_prot = NULL;
|
|
else
|
|
jit_tls->restore_stack_prot = try_more_restore_tramp;
|
|
/* here we also throw a stack overflow exception */
|
|
ex->trace_ips = NULL;
|
|
ex->stack_trace = NULL;
|
|
mono_raise_exception (ex);
|
|
}
|
|
|
|
gpointer
|
|
mono_altstack_restore_prot (mgreg_t *regs, guint8 *code, gpointer *tramp_data, guint8* tramp)
|
|
{
|
|
void (*func)(void) = (void (*)(void))tramp_data;
|
|
func ();
|
|
return NULL;
|
|
}
|
|
|
|
gboolean
|
|
mono_handle_soft_stack_ovf (MonoJitTlsData *jit_tls, MonoJitInfo *ji, void *ctx, MONO_SIG_HANDLER_INFO_TYPE *siginfo, guint8* fault_addr)
|
|
{
|
|
if (mono_llvm_only)
|
|
return FALSE;
|
|
|
|
/* we got a stack overflow in the soft-guard pages
|
|
* There are two cases:
|
|
* 1) managed code caused the overflow: we unprotect the soft-guard page
|
|
* and let the arch-specific code trigger the exception handling mechanism
|
|
* in the thread stack. The soft-guard pages will be protected again as the stack is unwound.
|
|
* 2) unmanaged code caused the overflow: we unprotect the soft-guard page
|
|
* and hope we can continue with those enabled, at least until the hard-guard page
|
|
* is hit. The alternative to continuing here is to just print a message and abort.
|
|
* We may add in the future the code to protect the pages again in the codepath
|
|
* when we return from unmanaged to managed code.
|
|
*/
|
|
if (jit_tls->stack_ovf_guard_size && fault_addr >= (guint8*)jit_tls->stack_ovf_guard_base &&
|
|
fault_addr < (guint8*)jit_tls->stack_ovf_guard_base + jit_tls->stack_ovf_guard_size) {
|
|
/* we unprotect the minimum amount we can */
|
|
guint32 guard_size;
|
|
gboolean handled = FALSE;
|
|
|
|
guard_size = jit_tls->stack_ovf_guard_size - (mono_pagesize () * SIZEOF_VOID_P / 4);
|
|
while (guard_size && fault_addr < (guint8*)jit_tls->stack_ovf_guard_base + guard_size) {
|
|
guard_size -= mono_pagesize ();
|
|
}
|
|
guard_size = jit_tls->stack_ovf_guard_size - guard_size;
|
|
/*fprintf (stderr, "unprotecting: %d\n", guard_size);*/
|
|
mono_mprotect ((char*)jit_tls->stack_ovf_guard_base + jit_tls->stack_ovf_guard_size - guard_size, guard_size, MONO_MMAP_READ|MONO_MMAP_WRITE);
|
|
#ifdef MONO_ARCH_SIGSEGV_ON_ALTSTACK
|
|
if (ji) {
|
|
mono_arch_handle_altstack_exception (ctx, siginfo, fault_addr, TRUE);
|
|
handled = TRUE;
|
|
}
|
|
#endif
|
|
if (!handled) {
|
|
/* We print a message: after this even managed stack overflows
|
|
* may crash the runtime
|
|
*/
|
|
mono_runtime_printf_err ("Stack overflow in unmanaged: IP: %p, fault addr: %p", mono_arch_ip_from_context (ctx), fault_addr);
|
|
if (!jit_tls->handling_stack_ovf) {
|
|
jit_tls->restore_stack_prot = restore_stack_protection_tramp;
|
|
jit_tls->handling_stack_ovf = 1;
|
|
} else {
|
|
/*fprintf (stderr, "Already handling stack overflow\n");*/
|
|
}
|
|
}
|
|
return TRUE;
|
|
}
|
|
return FALSE;
|
|
}
|
|
|
|
typedef struct {
|
|
MonoMethod *omethod;
|
|
int count;
|
|
} PrintOverflowUserData;
|
|
|
|
#ifdef MONO_ARCH_HAVE_SIGCTX_TO_MONOCTX
|
|
static gboolean
|
|
print_overflow_stack_frame (StackFrameInfo *frame, MonoContext *ctx, gpointer data)
|
|
{
|
|
MonoMethod *method = NULL;
|
|
PrintOverflowUserData *user_data = (PrintOverflowUserData *)data;
|
|
gchar *location;
|
|
|
|
if (frame->ji && frame->type != FRAME_TYPE_TRAMPOLINE)
|
|
method = jinfo_get_method (frame->ji);
|
|
|
|
if (method) {
|
|
if (user_data->count == 0) {
|
|
/* The first frame is in its prolog, so a line number cannot be computed */
|
|
user_data->count ++;
|
|
return FALSE;
|
|
}
|
|
|
|
/* If this is a one method overflow, skip the other instances */
|
|
if (method == user_data->omethod)
|
|
return FALSE;
|
|
|
|
location = mono_debug_print_stack_frame (method, frame->native_offset, mono_domain_get ());
|
|
mono_runtime_printf_err (" %s", location);
|
|
g_free (location);
|
|
|
|
if (user_data->count == 1) {
|
|
mono_runtime_printf_err (" <...>");
|
|
user_data->omethod = method;
|
|
} else {
|
|
user_data->omethod = NULL;
|
|
}
|
|
|
|
user_data->count ++;
|
|
} else
|
|
mono_runtime_printf_err (" at <unknown> <0x%05x>", frame->native_offset);
|
|
|
|
return FALSE;
|
|
}
|
|
#endif
|
|
|
|
void
|
|
mono_handle_hard_stack_ovf (MonoJitTlsData *jit_tls, MonoJitInfo *ji, void *ctx, guint8* fault_addr)
|
|
{
|
|
#ifdef MONO_ARCH_HAVE_SIGCTX_TO_MONOCTX
|
|
PrintOverflowUserData ud;
|
|
MonoContext mctx;
|
|
#endif
|
|
|
|
/* we don't do much now, but we can warn the user with a useful message */
|
|
mono_runtime_printf_err ("Stack overflow: IP: %p, fault addr: %p", mono_arch_ip_from_context (ctx), fault_addr);
|
|
|
|
#ifdef MONO_ARCH_HAVE_SIGCTX_TO_MONOCTX
|
|
mono_sigctx_to_monoctx (ctx, &mctx);
|
|
|
|
mono_runtime_printf_err ("Stacktrace:");
|
|
|
|
memset (&ud, 0, sizeof (ud));
|
|
|
|
mono_walk_stack_with_ctx (print_overflow_stack_frame, &mctx, MONO_UNWIND_LOOKUP_ACTUAL_METHOD, &ud);
|
|
#else
|
|
if (ji && !ji->is_trampoline && jinfo_get_method (ji))
|
|
mono_runtime_printf_err ("At %s", mono_method_full_name (jinfo_get_method (ji), TRUE));
|
|
else
|
|
mono_runtime_printf_err ("At <unmanaged>.");
|
|
#endif
|
|
|
|
_exit (1);
|
|
}
|
|
|
|
static gboolean
|
|
print_stack_frame_to_stderr (StackFrameInfo *frame, MonoContext *ctx, gpointer data)
|
|
{
|
|
MonoMethod *method = NULL;
|
|
|
|
if (frame->ji && frame->type != FRAME_TYPE_TRAMPOLINE)
|
|
method = jinfo_get_method (frame->ji);
|
|
|
|
if (method) {
|
|
gchar *location = mono_debug_print_stack_frame (method, frame->native_offset, mono_domain_get ());
|
|
mono_runtime_printf_err (" %s", location);
|
|
g_free (location);
|
|
} else
|
|
mono_runtime_printf_err (" at <unknown> <0x%05x>", frame->native_offset);
|
|
|
|
return FALSE;
|
|
}
|
|
|
|
static G_GNUC_UNUSED gboolean
|
|
print_stack_frame_to_string (StackFrameInfo *frame, MonoContext *ctx, gpointer data)
|
|
{
|
|
GString *p = (GString*)data;
|
|
MonoMethod *method = NULL;
|
|
|
|
if (frame->ji && frame->type != FRAME_TYPE_TRAMPOLINE)
|
|
method = jinfo_get_method (frame->ji);
|
|
|
|
if (method && frame->domain) {
|
|
gchar *location = mono_debug_print_stack_frame (method, frame->native_offset, frame->domain);
|
|
g_string_append_printf (p, " %s\n", location);
|
|
g_free (location);
|
|
} else
|
|
g_string_append_printf (p, " at <unknown> <0x%05x>\n", frame->native_offset);
|
|
|
|
return FALSE;
|
|
}
|
|
|
|
#ifndef MONO_CROSS_COMPILE
|
|
|
|
static gboolean handling_sigsegv = FALSE;
|
|
|
|
/*
|
|
* mono_handle_native_sigsegv:
|
|
*
|
|
* Handle a SIGSEGV received while in native code by printing diagnostic
|
|
* information and aborting.
|
|
*/
|
|
void
|
|
mono_handle_native_sigsegv (int signal, void *ctx, MONO_SIG_HANDLER_INFO_TYPE *info)
|
|
{
|
|
#ifdef MONO_ARCH_USE_SIGACTION
|
|
struct sigaction sa;
|
|
#endif
|
|
MonoJitTlsData *jit_tls = (MonoJitTlsData *)mono_native_tls_get_value (mono_jit_tls_id);
|
|
const char *signal_str = (signal == SIGSEGV) ? "SIGSEGV" : "SIGABRT";
|
|
|
|
if (handling_sigsegv)
|
|
return;
|
|
|
|
if (mini_get_debug_options ()->suspend_on_sigsegv) {
|
|
mono_runtime_printf_err ("Received SIGSEGV, suspending...");
|
|
#ifdef HOST_WIN32
|
|
while (1)
|
|
;
|
|
#else
|
|
while (1) {
|
|
sleep (1);
|
|
}
|
|
#endif
|
|
}
|
|
|
|
/* To prevent infinite loops when the stack walk causes a crash */
|
|
handling_sigsegv = TRUE;
|
|
|
|
/* !jit_tls means the thread was not registered with the runtime */
|
|
if (jit_tls && mono_thread_internal_current ()) {
|
|
mono_runtime_printf_err ("Stacktrace:\n");
|
|
|
|
/* FIXME: Is MONO_UNWIND_LOOKUP_IL_OFFSET correct here? */
|
|
mono_walk_stack (print_stack_frame_to_stderr, MONO_UNWIND_LOOKUP_IL_OFFSET, NULL);
|
|
}
|
|
|
|
#ifdef HAVE_BACKTRACE_SYMBOLS
|
|
{
|
|
void *array [256];
|
|
char **names;
|
|
int i, size;
|
|
|
|
mono_runtime_printf_err ("\nNative stacktrace:\n");
|
|
|
|
size = backtrace (array, 256);
|
|
names = backtrace_symbols (array, size);
|
|
for (i =0; i < size; ++i) {
|
|
mono_runtime_printf_err ("\t%s", names [i]);
|
|
}
|
|
free (names);
|
|
|
|
/* Try to get more meaningful information using gdb */
|
|
|
|
#if !defined(HOST_WIN32) && defined(HAVE_SYS_SYSCALL_H) && defined(SYS_fork)
|
|
if (!mini_get_debug_options ()->no_gdb_backtrace) {
|
|
/* From g_spawn_command_line_sync () in eglib */
|
|
pid_t pid;
|
|
int status;
|
|
pid_t crashed_pid = getpid ();
|
|
|
|
//pid = fork ();
|
|
/*
|
|
* glibc fork acquires some locks, so if the crash happened inside malloc/free,
|
|
* it will deadlock. Call the syscall directly instead.
|
|
*/
|
|
pid = mono_runtime_syscall_fork ();
|
|
#if defined (HAVE_PRCTL) && defined(PR_SET_PTRACER)
|
|
if (pid > 0) {
|
|
// Allow gdb to attach to the process even if ptrace_scope sysctl variable is set to
|
|
// a value other than 0 (the most permissive ptrace scope). Most modern Linux
|
|
// distributions set the scope to 1 which allows attaching only to direct children of
|
|
// the current process
|
|
prctl (PR_SET_PTRACER, pid, 0, 0, 0);
|
|
}
|
|
#endif
|
|
if (pid == 0) {
|
|
dup2 (STDERR_FILENO, STDOUT_FILENO);
|
|
|
|
mono_gdb_render_native_backtraces (crashed_pid);
|
|
exit (1);
|
|
}
|
|
|
|
mono_runtime_printf_err ("\nDebug info from gdb:\n");
|
|
waitpid (pid, &status, 0);
|
|
}
|
|
#endif
|
|
}
|
|
#elif defined (ENABLE_EXTENSION_MODULE)
|
|
mono_extension_handle_native_sigsegv (ctx, info);
|
|
#endif
|
|
|
|
/*
|
|
* A SIGSEGV indicates something went very wrong so we can no longer depend
|
|
* on anything working. So try to print out lots of diagnostics, starting
|
|
* with ones which have a greater chance of working.
|
|
*/
|
|
mono_runtime_printf_err (
|
|
"\n"
|
|
"=================================================================\n"
|
|
"Got a %s while executing native code. This usually indicates\n"
|
|
"a fatal error in the mono runtime or one of the native libraries \n"
|
|
"used by your application.\n"
|
|
"=================================================================\n",
|
|
signal_str);
|
|
|
|
|
|
#ifdef MONO_ARCH_USE_SIGACTION
|
|
|
|
/* Remove our SIGABRT handler */
|
|
sa.sa_handler = SIG_DFL;
|
|
sigemptyset (&sa.sa_mask);
|
|
sa.sa_flags = 0;
|
|
|
|
g_assert (sigaction (SIGABRT, &sa, NULL) != -1);
|
|
|
|
#endif
|
|
|
|
if (!mono_do_crash_chaining) {
|
|
/*Android abort is a fluke, it doesn't abort, it triggers another segv. */
|
|
#if defined (PLATFORM_ANDROID)
|
|
exit (-1);
|
|
#else
|
|
abort ();
|
|
#endif
|
|
}
|
|
}
|
|
|
|
#else
|
|
|
|
void
|
|
mono_handle_native_sigsegv (int signal, void *ctx, MONO_SIG_HANDLER_INFO_TYPE *info)
|
|
{
|
|
g_assert_not_reached ();
|
|
}
|
|
|
|
#endif /* !MONO_CROSS_COMPILE */
|
|
|
|
static void
|
|
mono_print_thread_dump_internal (void *sigctx, MonoContext *start_ctx)
|
|
{
|
|
MonoInternalThread *thread = mono_thread_internal_current ();
|
|
#ifdef MONO_ARCH_HAVE_SIGCTX_TO_MONOCTX
|
|
MonoContext ctx;
|
|
#endif
|
|
GString* text;
|
|
char *name;
|
|
#ifndef HOST_WIN32
|
|
char *wapi_desc;
|
|
#endif
|
|
GError *error = NULL;
|
|
|
|
if (!thread)
|
|
return;
|
|
|
|
text = g_string_new (0);
|
|
if (thread->name) {
|
|
name = g_utf16_to_utf8 (thread->name, thread->name_len, NULL, NULL, &error);
|
|
g_assert (!error);
|
|
g_string_append_printf (text, "\n\"%s\"", name);
|
|
g_free (name);
|
|
}
|
|
else if (thread->threadpool_thread)
|
|
g_string_append (text, "\n\"<threadpool thread>\"");
|
|
else
|
|
g_string_append (text, "\n\"<unnamed thread>\"");
|
|
|
|
#ifndef HOST_WIN32
|
|
wapi_desc = wapi_current_thread_desc ();
|
|
g_string_append_printf (text, " tid=0x%p this=0x%p %s\n", (gpointer)(gsize)thread->tid, thread, wapi_desc);
|
|
free (wapi_desc);
|
|
#endif
|
|
|
|
#ifdef MONO_ARCH_HAVE_SIGCTX_TO_MONOCTX
|
|
if (start_ctx) {
|
|
memcpy (&ctx, start_ctx, sizeof (MonoContext));
|
|
} else if (!sigctx)
|
|
MONO_INIT_CONTEXT_FROM_FUNC (&ctx, mono_print_thread_dump);
|
|
else
|
|
mono_sigctx_to_monoctx (sigctx, &ctx);
|
|
|
|
mono_walk_stack_with_ctx (print_stack_frame_to_string, &ctx, MONO_UNWIND_LOOKUP_ALL, text);
|
|
#else
|
|
mono_runtime_printf ("\t<Stack traces in thread dumps not supported on this platform>");
|
|
#endif
|
|
|
|
mono_runtime_printf ("%s", text->str);
|
|
|
|
#if PLATFORM_WIN32 && TARGET_WIN32 && _DEBUG
|
|
OutputDebugStringA(text->str);
|
|
#endif
|
|
|
|
g_string_free (text, TRUE);
|
|
mono_runtime_stdout_fflush ();
|
|
}
|
|
|
|
/*
|
|
* mono_print_thread_dump:
|
|
*
|
|
* Print information about the current thread to stdout.
|
|
* SIGCTX can be NULL, allowing this to be called from gdb.
|
|
*/
|
|
void
|
|
mono_print_thread_dump (void *sigctx)
|
|
{
|
|
mono_print_thread_dump_internal (sigctx, NULL);
|
|
}
|
|
|
|
void
|
|
mono_print_thread_dump_from_ctx (MonoContext *ctx)
|
|
{
|
|
mono_print_thread_dump_internal (NULL, ctx);
|
|
}
|
|
|
|
/*
|
|
* mono_resume_unwind:
|
|
*
|
|
* This is called by a trampoline from LLVM compiled finally clauses to continue
|
|
* unwinding.
|
|
*/
|
|
void
|
|
mono_resume_unwind (MonoContext *ctx)
|
|
{
|
|
MonoJitTlsData *jit_tls = (MonoJitTlsData *)mono_native_tls_get_value (mono_jit_tls_id);
|
|
MonoContext new_ctx;
|
|
|
|
MONO_CONTEXT_SET_IP (ctx, MONO_CONTEXT_GET_IP (&jit_tls->resume_state.ctx));
|
|
MONO_CONTEXT_SET_SP (ctx, MONO_CONTEXT_GET_SP (&jit_tls->resume_state.ctx));
|
|
new_ctx = *ctx;
|
|
|
|
mono_handle_exception_internal (&new_ctx, (MonoObject *)jit_tls->resume_state.ex_obj, TRUE, NULL);
|
|
|
|
mono_restore_context (&new_ctx);
|
|
}
|
|
|
|
#ifdef MONO_ARCH_HAVE_HANDLER_BLOCK_GUARD
|
|
|
|
typedef struct {
|
|
MonoJitInfo *ji;
|
|
MonoContext ctx;
|
|
MonoJitExceptionInfo *ei;
|
|
} FindHandlerBlockData;
|
|
|
|
static gboolean
|
|
find_last_handler_block (StackFrameInfo *frame, MonoContext *ctx, gpointer data)
|
|
{
|
|
int i;
|
|
gpointer ip;
|
|
FindHandlerBlockData *pdata = (FindHandlerBlockData *)data;
|
|
MonoJitInfo *ji = frame->ji;
|
|
|
|
if (!ji)
|
|
return FALSE;
|
|
|
|
ip = MONO_CONTEXT_GET_IP (ctx);
|
|
|
|
for (i = 0; i < ji->num_clauses; ++i) {
|
|
MonoJitExceptionInfo *ei = ji->clauses + i;
|
|
if (ei->flags != MONO_EXCEPTION_CLAUSE_FINALLY)
|
|
continue;
|
|
/*If ip points to the first instruction it means the handler block didn't start
|
|
so we can leave its execution to the EH machinery*/
|
|
if (ei->handler_start < ip && ip < ei->data.handler_end) {
|
|
pdata->ji = ji;
|
|
pdata->ei = ei;
|
|
pdata->ctx = *ctx;
|
|
break;
|
|
}
|
|
}
|
|
return FALSE;
|
|
}
|
|
|
|
|
|
static gpointer
|
|
install_handler_block_guard (MonoJitInfo *ji, MonoContext *ctx)
|
|
{
|
|
int i;
|
|
MonoJitExceptionInfo *clause = NULL;
|
|
gpointer ip;
|
|
|
|
ip = MONO_CONTEXT_GET_IP (ctx);
|
|
|
|
for (i = 0; i < ji->num_clauses; ++i) {
|
|
clause = &ji->clauses [i];
|
|
if (clause->flags != MONO_EXCEPTION_CLAUSE_FINALLY)
|
|
continue;
|
|
if (clause->handler_start < ip && clause->data.handler_end > ip)
|
|
break;
|
|
}
|
|
|
|
/*no matching finally */
|
|
if (i == ji->num_clauses)
|
|
return NULL;
|
|
|
|
/*If we stopped on the instruction right before the try, we haven't actually started executing it*/
|
|
if (ip == clause->handler_start)
|
|
return NULL;
|
|
|
|
return mono_arch_install_handler_block_guard (ji, clause, ctx, mono_create_handler_block_trampoline ());
|
|
}
|
|
|
|
/*
|
|
* Finds the bottom handler block running and install a block guard if needed.
|
|
* FIXME add full-aot support.
|
|
*/
|
|
gboolean
|
|
mono_install_handler_block_guard (MonoThreadUnwindState *ctx)
|
|
{
|
|
FindHandlerBlockData data = { 0 };
|
|
MonoJitTlsData *jit_tls = (MonoJitTlsData *)ctx->unwind_data [MONO_UNWIND_DATA_JIT_TLS];
|
|
gpointer resume_ip;
|
|
|
|
/* FIXME */
|
|
if (mono_aot_only)
|
|
return FALSE;
|
|
|
|
/* Guard against a null MonoJitTlsData. This can happens if the thread receives the
|
|
* interrupt signal before the JIT has time to initialize its TLS data for the given thread.
|
|
*/
|
|
if (!jit_tls || jit_tls->handler_block_return_address)
|
|
return FALSE;
|
|
|
|
/* Do an async safe stack walk */
|
|
mono_thread_info_set_is_async_context (TRUE);
|
|
mono_walk_stack_with_state (find_last_handler_block, ctx, MONO_UNWIND_NONE, &data);
|
|
mono_thread_info_set_is_async_context (FALSE);
|
|
|
|
if (!data.ji)
|
|
return FALSE;
|
|
|
|
memcpy (&jit_tls->handler_block_context, &data.ctx, sizeof (MonoContext));
|
|
|
|
resume_ip = install_handler_block_guard (data.ji, &data.ctx);
|
|
if (resume_ip == NULL)
|
|
return FALSE;
|
|
|
|
jit_tls->handler_block_return_address = resume_ip;
|
|
jit_tls->handler_block = data.ei;
|
|
|
|
return TRUE;
|
|
}
|
|
|
|
#else
|
|
gboolean
|
|
mono_install_handler_block_guard (MonoThreadUnwindState *ctx)
|
|
{
|
|
return FALSE;
|
|
}
|
|
|
|
#endif
|
|
|
|
void
|
|
mono_set_cast_details (MonoClass *from, MonoClass *to)
|
|
{
|
|
MonoJitTlsData *jit_tls = NULL;
|
|
|
|
if (mini_get_debug_options ()->better_cast_details) {
|
|
jit_tls = (MonoJitTlsData *)mono_native_tls_get_value (mono_jit_tls_id);
|
|
jit_tls->class_cast_from = from;
|
|
jit_tls->class_cast_to = to;
|
|
}
|
|
}
|
|
|
|
|
|
/*returns false if the thread is not attached*/
|
|
gboolean
|
|
mono_thread_state_init_from_sigctx (MonoThreadUnwindState *ctx, void *sigctx)
|
|
{
|
|
#ifdef MONO_ARCH_HAVE_SIGCTX_TO_MONOCTX
|
|
MonoThreadInfo *thread = mono_thread_info_current_unchecked ();
|
|
if (!thread) {
|
|
ctx->valid = FALSE;
|
|
G_BREAKPOINT ();
|
|
return FALSE;
|
|
}
|
|
|
|
if (sigctx) {
|
|
mono_sigctx_to_monoctx (sigctx, &ctx->ctx);
|
|
|
|
ctx->unwind_data [MONO_UNWIND_DATA_DOMAIN] = mono_domain_get ();
|
|
ctx->unwind_data [MONO_UNWIND_DATA_LMF] = mono_get_lmf ();
|
|
ctx->unwind_data [MONO_UNWIND_DATA_JIT_TLS] = thread->jit_data;
|
|
}
|
|
else {
|
|
mono_thread_state_init (ctx);
|
|
}
|
|
|
|
if (!ctx->unwind_data [MONO_UNWIND_DATA_DOMAIN] || !ctx->unwind_data [MONO_UNWIND_DATA_LMF])
|
|
return FALSE;
|
|
|
|
ctx->valid = TRUE;
|
|
return TRUE;
|
|
#else
|
|
g_error ("Implement mono_arch_sigctx_to_monoctx for the current target");
|
|
return FALSE;
|
|
#endif
|
|
}
|
|
|
|
void
|
|
mono_thread_state_init (MonoThreadUnwindState *ctx)
|
|
{
|
|
MonoThreadInfo *thread = mono_thread_info_current_unchecked ();
|
|
|
|
#if defined(MONO_CROSS_COMPILE)
|
|
ctx->valid = FALSE; //A cross compiler doesn't need to suspend.
|
|
#elif MONO_ARCH_HAS_MONO_CONTEXT
|
|
MONO_CONTEXT_GET_CURRENT (ctx->ctx);
|
|
#else
|
|
g_error ("Use a null sigctx requires a working mono-context");
|
|
#endif
|
|
|
|
ctx->unwind_data [MONO_UNWIND_DATA_DOMAIN] = mono_domain_get ();
|
|
ctx->unwind_data [MONO_UNWIND_DATA_LMF] = mono_get_lmf ();
|
|
ctx->unwind_data [MONO_UNWIND_DATA_JIT_TLS] = thread ? thread->jit_data : NULL;
|
|
ctx->valid = TRUE;
|
|
}
|
|
|
|
|
|
gboolean
|
|
mono_thread_state_init_from_monoctx (MonoThreadUnwindState *ctx, MonoContext *mctx)
|
|
{
|
|
MonoThreadInfo *thread = mono_thread_info_current_unchecked ();
|
|
if (!thread) {
|
|
ctx->valid = FALSE;
|
|
return FALSE;
|
|
}
|
|
|
|
ctx->ctx = *mctx;
|
|
ctx->unwind_data [MONO_UNWIND_DATA_DOMAIN] = mono_domain_get ();
|
|
ctx->unwind_data [MONO_UNWIND_DATA_LMF] = mono_get_lmf ();
|
|
ctx->unwind_data [MONO_UNWIND_DATA_JIT_TLS] = thread->jit_data;
|
|
ctx->valid = TRUE;
|
|
return TRUE;
|
|
}
|
|
|
|
/*returns false if the thread is not attached*/
|
|
gboolean
|
|
mono_thread_state_init_from_current (MonoThreadUnwindState *ctx)
|
|
{
|
|
MonoThreadInfo *thread = mono_thread_info_current_unchecked ();
|
|
MONO_ARCH_CONTEXT_DEF
|
|
|
|
mono_arch_flush_register_windows ();
|
|
|
|
if (!thread || !thread->jit_data) {
|
|
ctx->valid = FALSE;
|
|
return FALSE;
|
|
}
|
|
#ifdef MONO_INIT_CONTEXT_FROM_CURRENT
|
|
MONO_INIT_CONTEXT_FROM_CURRENT (&ctx->ctx);
|
|
#else
|
|
MONO_INIT_CONTEXT_FROM_FUNC (&ctx->ctx, mono_thread_state_init_from_current);
|
|
#endif
|
|
|
|
ctx->unwind_data [MONO_UNWIND_DATA_DOMAIN] = mono_domain_get ();
|
|
ctx->unwind_data [MONO_UNWIND_DATA_LMF] = mono_get_lmf ();
|
|
ctx->unwind_data [MONO_UNWIND_DATA_JIT_TLS] = thread->jit_data;
|
|
ctx->valid = TRUE;
|
|
return TRUE;
|
|
}
|
|
|
|
static void
|
|
mono_raise_exception_with_ctx (MonoException *exc, MonoContext *ctx)
|
|
{
|
|
mono_handle_exception (ctx, (MonoObject *)exc);
|
|
mono_restore_context (ctx);
|
|
}
|
|
|
|
/*FIXME Move all monoctx -> sigctx conversion to signal handlers once all archs support utils/mono-context */
|
|
void
|
|
mono_setup_async_callback (MonoContext *ctx, void (*async_cb)(void *fun), gpointer user_data)
|
|
{
|
|
#ifdef MONO_ARCH_HAVE_SETUP_ASYNC_CALLBACK
|
|
MonoJitTlsData *jit_tls = (MonoJitTlsData *)mono_native_tls_get_value (mono_jit_tls_id);
|
|
jit_tls->ex_ctx = *ctx;
|
|
|
|
mono_arch_setup_async_callback (ctx, async_cb, user_data);
|
|
#else
|
|
g_error ("This target doesn't support mono_arch_setup_async_callback");
|
|
#endif
|
|
}
|
|
|
|
void
|
|
mono_install_unhandled_exception_hook (MonoUnhandledExceptionFunc func, gpointer user_data)
|
|
{
|
|
unhandled_exception_hook = func;
|
|
unhandled_exception_hook_data = user_data;
|
|
}
|
|
|
|
void
|
|
mono_invoke_unhandled_exception_hook (MonoObject *exc)
|
|
{
|
|
if (unhandled_exception_hook) {
|
|
unhandled_exception_hook (exc, unhandled_exception_hook_data);
|
|
} else {
|
|
MonoObject *other = NULL;
|
|
MonoString *str = mono_object_to_string (exc, &other);
|
|
char *msg = NULL;
|
|
|
|
if (str)
|
|
msg = mono_string_to_utf8 (str);
|
|
else if (other) {
|
|
char *original_backtrace = mono_exception_get_managed_backtrace ((MonoException*)exc);
|
|
char *nested_backtrace = mono_exception_get_managed_backtrace ((MonoException*)other);
|
|
|
|
msg = g_strdup_printf ("Nested exception detected.\nOriginal Exception: %s\nNested exception:%s\n",
|
|
original_backtrace, nested_backtrace);
|
|
|
|
g_free (original_backtrace);
|
|
g_free (nested_backtrace);
|
|
} else {
|
|
msg = g_strdup ("Nested exception trying to figure out what went wrong");
|
|
}
|
|
mono_runtime_printf_err ("[ERROR] FATAL UNHANDLED EXCEPTION: %s", msg);
|
|
g_free (msg);
|
|
#if defined(HOST_IOS)
|
|
g_assertion_message ("Terminating runtime due to unhandled exception");
|
|
#else
|
|
exit (mono_environment_exitcode_get ());
|
|
#endif
|
|
}
|
|
|
|
g_assert_not_reached ();
|
|
}
|
|
|
|
/*
|
|
* mono_restore_context:
|
|
*
|
|
* Call the architecture specific restore context function.
|
|
*/
|
|
void
|
|
mono_restore_context (MonoContext *ctx)
|
|
{
|
|
static void (*restore_context) (MonoContext *);
|
|
|
|
if (!restore_context)
|
|
restore_context = (void (*)(MonoContext *))mono_get_restore_context ();
|
|
restore_context (ctx);
|
|
g_assert_not_reached ();
|
|
}
|
|
|
|
/*
|
|
* mono_jinfo_get_unwind_info:
|
|
*
|
|
* Return the unwind info for JI.
|
|
*/
|
|
guint8*
|
|
mono_jinfo_get_unwind_info (MonoJitInfo *ji, guint32 *unwind_info_len)
|
|
{
|
|
if (ji->from_aot)
|
|
return mono_aot_get_unwind_info (ji, unwind_info_len);
|
|
else
|
|
return mono_get_cached_unwind_info (ji->unwind_info, unwind_info_len);
|
|
}
|
|
|
|
int
|
|
mono_jinfo_get_epilog_size (MonoJitInfo *ji)
|
|
{
|
|
MonoArchEHJitInfo *info;
|
|
|
|
info = mono_jit_info_get_arch_eh_info (ji);
|
|
g_assert (info);
|
|
|
|
return info->epilog_size;
|
|
}
|
|
|
|
/*
|
|
* LLVM/Bitcode exception handling.
|
|
*/
|
|
|
|
static void
|
|
throw_exception (MonoObject *ex, gboolean rethrow)
|
|
{
|
|
MonoJitTlsData *jit_tls = mono_get_jit_tls ();
|
|
MonoException *mono_ex;
|
|
|
|
if (!mono_object_isinst (ex, mono_defaults.exception_class))
|
|
mono_ex = mono_get_exception_runtime_wrapped (ex);
|
|
else
|
|
mono_ex = (MonoException*)ex;
|
|
|
|
// Note: Not pinned
|
|
jit_tls->thrown_exc = mono_gchandle_new ((MonoObject*)mono_ex, FALSE);
|
|
|
|
if (!rethrow) {
|
|
#ifdef MONO_ARCH_HAVE_UNWIND_BACKTRACE
|
|
GList *l, *ips = NULL;
|
|
GList *trace;
|
|
|
|
_Unwind_Backtrace (build_stack_trace, &ips);
|
|
/* The list contains ip-gshared info pairs */
|
|
trace = NULL;
|
|
ips = g_list_reverse (ips);
|
|
for (l = ips; l; l = l->next) {
|
|
trace = g_list_append (trace, l->data);
|
|
trace = g_list_append (trace, NULL);
|
|
}
|
|
MONO_OBJECT_SETREF (mono_ex, trace_ips, mono_glist_to_array (trace, mono_defaults.int_class));
|
|
g_list_free (l);
|
|
g_list_free (trace);
|
|
#endif
|
|
}
|
|
|
|
mono_llvm_cpp_throw_exception ();
|
|
}
|
|
|
|
void
|
|
mono_llvm_throw_exception (MonoObject *ex)
|
|
{
|
|
throw_exception (ex, FALSE);
|
|
}
|
|
|
|
void
|
|
mono_llvm_rethrow_exception (MonoObject *ex)
|
|
{
|
|
throw_exception (ex, TRUE);
|
|
}
|
|
|
|
void
|
|
mono_llvm_raise_exception (MonoException *e)
|
|
{
|
|
mono_llvm_throw_exception ((MonoObject*)e);
|
|
}
|
|
|
|
void
|
|
mono_llvm_throw_corlib_exception (guint32 ex_token_index)
|
|
{
|
|
guint32 ex_token = MONO_TOKEN_TYPE_DEF | ex_token_index;
|
|
MonoException *ex;
|
|
|
|
ex = mono_exception_from_token (mono_defaults.exception_class->image, ex_token);
|
|
|
|
mono_llvm_throw_exception ((MonoObject*)ex);
|
|
}
|
|
|
|
/*
|
|
* mono_llvm_resume_exception:
|
|
*
|
|
* Resume exception propagation.
|
|
*/
|
|
void
|
|
mono_llvm_resume_exception (void)
|
|
{
|
|
mono_llvm_cpp_throw_exception ();
|
|
}
|
|
|
|
/*
|
|
* mono_llvm_load_exception:
|
|
*
|
|
* Return the currently thrown exception.
|
|
*/
|
|
MonoObject *
|
|
mono_llvm_load_exception (void)
|
|
{
|
|
MonoJitTlsData *jit_tls = mono_get_jit_tls ();
|
|
|
|
MonoException *mono_ex = (MonoException*)mono_gchandle_get_target (jit_tls->thrown_exc);
|
|
|
|
if (mono_ex->trace_ips) {
|
|
GList *trace_ips = NULL;
|
|
gpointer ip = __builtin_return_address (0);
|
|
|
|
size_t upper = mono_array_length (mono_ex->trace_ips);
|
|
|
|
for (int i = 0; i < upper; i+= 2) {
|
|
gpointer curr_ip = mono_array_get (mono_ex->trace_ips, gpointer, i);
|
|
gpointer curr_info = mono_array_get (mono_ex->trace_ips, gpointer, i + 1);
|
|
trace_ips = g_list_append (trace_ips, curr_ip);
|
|
trace_ips = g_list_append (trace_ips, curr_info);
|
|
|
|
if (ip == curr_ip)
|
|
break;
|
|
}
|
|
|
|
// FIXME: Does this work correctly for rethrows?
|
|
// We may be discarding useful information
|
|
// when this gets GC'ed
|
|
MONO_OBJECT_SETREF (mono_ex, trace_ips, mono_glist_to_array (trace_ips, mono_defaults.int_class));
|
|
g_list_free (trace_ips);
|
|
|
|
// FIXME:
|
|
//MONO_OBJECT_SETREF (mono_ex, stack_trace, ves_icall_System_Exception_get_trace (mono_ex));
|
|
} else {
|
|
MONO_OBJECT_SETREF (mono_ex, trace_ips, mono_array_new (mono_domain_get (), mono_defaults.int_class, 0));
|
|
MONO_OBJECT_SETREF (mono_ex, stack_trace, mono_array_new (mono_domain_get (), mono_defaults.stack_frame_class, 0));
|
|
}
|
|
|
|
return &mono_ex->object;
|
|
}
|
|
|
|
/*
|
|
* mono_llvm_clear_exception:
|
|
*
|
|
* Mark the currently thrown exception as handled.
|
|
*/
|
|
void
|
|
mono_llvm_clear_exception (void)
|
|
{
|
|
MonoJitTlsData *jit_tls = mono_get_jit_tls ();
|
|
mono_gchandle_free (jit_tls->thrown_exc);
|
|
jit_tls->thrown_exc = 0;
|
|
|
|
mono_memory_barrier ();
|
|
}
|
|
|
|
/*
|
|
* mono_llvm_match_exception:
|
|
*
|
|
* Return the innermost clause containing REGION_START-REGION_END which can handle
|
|
* the current exception.
|
|
*/
|
|
gint32
|
|
mono_llvm_match_exception (MonoJitInfo *jinfo, guint32 region_start, guint32 region_end, gpointer rgctx, MonoObject *this_obj)
|
|
{
|
|
MonoJitTlsData *jit_tls = mono_get_jit_tls ();
|
|
MonoObject *exc;
|
|
gint32 index = -1;
|
|
|
|
g_assert (jit_tls->thrown_exc);
|
|
exc = mono_gchandle_get_target (jit_tls->thrown_exc);
|
|
for (int i = 0; i < jinfo->num_clauses; i++) {
|
|
MonoJitExceptionInfo *ei = &jinfo->clauses [i];
|
|
MonoClass *catch_class;
|
|
|
|
if (! (ei->try_offset == region_start && ei->try_offset + ei->try_len == region_end) )
|
|
continue;
|
|
|
|
catch_class = ei->data.catch_class;
|
|
if (catch_class->byval_arg.type == MONO_TYPE_VAR || catch_class->byval_arg.type == MONO_TYPE_MVAR || catch_class->byval_arg.type == MONO_TYPE_GENERICINST) {
|
|
MonoGenericContext context;
|
|
MonoType *inflated_type;
|
|
|
|
g_assert (rgctx || this_obj);
|
|
context = get_generic_context_from_stack_frame (jinfo, rgctx ? rgctx : this_obj->vtable);
|
|
inflated_type = mono_class_inflate_generic_type (&catch_class->byval_arg, &context);
|
|
catch_class = mono_class_from_mono_type (inflated_type);
|
|
mono_metadata_free_type (inflated_type);
|
|
}
|
|
|
|
// FIXME: Handle edge cases handled in get_exception_catch_class
|
|
if (ei->flags == MONO_EXCEPTION_CLAUSE_NONE && mono_object_isinst (exc, catch_class)) {
|
|
index = ei->clause_index;
|
|
break;
|
|
} else if (ei->flags == MONO_EXCEPTION_CLAUSE_FILTER) {
|
|
g_assert_not_reached ();
|
|
}
|
|
}
|
|
|
|
return index;
|
|
}
|
|
|
|
#ifdef ENABLE_LLVM
|
|
_Unwind_Reason_Code
|
|
mono_debug_personality (int a, _Unwind_Action b,
|
|
uint64_t c, struct _Unwind_Exception *d, struct _Unwind_Context *e)
|
|
{
|
|
g_assert_not_reached ();
|
|
}
|
|
#else
|
|
void
|
|
mono_debug_personality (void);
|
|
|
|
void
|
|
mono_debug_personality (void)
|
|
{
|
|
g_assert_not_reached ();
|
|
}
|
|
#endif
|