mirror of
https://gitlab.winehq.org/wine/wine-gecko.git
synced 2024-09-13 09:24:08 -07:00
974220b68a
This patch introduces a small utility program to extract a guid from a shared library or executable on windows to identify the correct symbol file to read in fix_stack_using_bpsyms.py. In order for this to work correctly on windows, the library name provided by MozDescribeCodeAddress needs to be a full path, so the LoadedImageName field from the IMAGEHLP_MODULE64 structure is used here instead of the ModuleName field. MozReview-Commit-ID: 8zkfLWjKVs2
1183 lines
34 KiB
C++
1183 lines
34 KiB
C++
/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
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/* vim: set ts=8 sts=2 et sw=2 tw=80: */
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/* This Source Code Form is subject to the terms of the Mozilla Public
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* License, v. 2.0. If a copy of the MPL was not distributed with this
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* file, You can obtain one at http://mozilla.org/MPL/2.0/. */
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/* API for getting a stack trace of the C/C++ stack on the current thread */
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#include "mozilla/ArrayUtils.h"
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#include "mozilla/Assertions.h"
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#include "mozilla/IntegerPrintfMacros.h"
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#include "mozilla/StackWalk.h"
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#include <string.h>
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#if defined(_MSC_VER) && _MSC_VER < 1900
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#define snprintf _snprintf
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#endif
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using namespace mozilla;
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// The presence of this address is the stack must stop the stack walk. If
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// there is no such address, the structure will be {nullptr, true}.
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struct CriticalAddress
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{
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void* mAddr;
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bool mInit;
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};
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static CriticalAddress gCriticalAddress;
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// for _Unwind_Backtrace from libcxxrt or libunwind
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// cxxabi.h from libcxxrt implicitly includes unwind.h first
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#if defined(HAVE__UNWIND_BACKTRACE) && !defined(_GNU_SOURCE)
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#define _GNU_SOURCE
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#endif
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#if defined(HAVE_DLOPEN) || defined(XP_DARWIN)
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#include <dlfcn.h>
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#endif
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#define MOZ_STACKWALK_SUPPORTS_MACOSX \
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(defined(XP_DARWIN) && \
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(defined(__i386) || defined(__ppc__) || defined(HAVE__UNWIND_BACKTRACE)))
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#define MOZ_STACKWALK_SUPPORTS_LINUX \
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(defined(linux) && \
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((defined(__GNUC__) && (defined(__i386) || defined(PPC))) || \
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defined(HAVE__UNWIND_BACKTRACE)))
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#if __GLIBC__ > 2 || (__GLIBC__ == 2 && __GLIBC_MINOR__ >= 1)
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#define HAVE___LIBC_STACK_END 1
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#else
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#define HAVE___LIBC_STACK_END 0
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#endif
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#if HAVE___LIBC_STACK_END
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extern MOZ_EXPORT void* __libc_stack_end; // from ld-linux.so
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#endif
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#ifdef ANDROID
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#include <algorithm>
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#include <unistd.h>
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#include <pthread.h>
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#endif
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#if MOZ_STACKWALK_SUPPORTS_MACOSX
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#include <pthread.h>
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#include <sys/errno.h>
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#ifdef MOZ_WIDGET_COCOA
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#include <CoreServices/CoreServices.h>
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#endif
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typedef void
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malloc_logger_t(uint32_t aType,
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uintptr_t aArg1, uintptr_t aArg2, uintptr_t aArg3,
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uintptr_t aResult, uint32_t aNumHotFramesToSkip);
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extern malloc_logger_t* malloc_logger;
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static void
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stack_callback(uint32_t aFrameNumber, void* aPc, void* aSp, void* aClosure)
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{
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const char* name = static_cast<char*>(aClosure);
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Dl_info info;
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// On Leopard dladdr returns the wrong value for "new_sem_from_pool". The
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// stack shows up as having two pthread_cond_wait$UNIX2003 frames. The
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// correct one is the first that we find on our way up, so the
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// following check for gCriticalAddress.mAddr is critical.
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if (gCriticalAddress.mAddr || dladdr(aPc, &info) == 0 ||
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!info.dli_sname || strcmp(info.dli_sname, name) != 0) {
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return;
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}
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gCriticalAddress.mAddr = aPc;
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}
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#if defined(MOZ_WIDGET_COCOA) && defined(DEBUG)
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#define MAC_OS_X_VERSION_10_7_HEX 0x00001070
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static int32_t OSXVersion()
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{
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static int32_t gOSXVersion = 0x0;
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if (gOSXVersion == 0x0) {
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OSErr err = ::Gestalt(gestaltSystemVersion, (SInt32*)&gOSXVersion);
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MOZ_ASSERT(err == noErr);
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}
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return gOSXVersion;
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}
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static bool OnLionOrLater()
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{
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return (OSXVersion() >= MAC_OS_X_VERSION_10_7_HEX);
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}
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#endif
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static void
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my_malloc_logger(uint32_t aType,
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uintptr_t aArg1, uintptr_t aArg2, uintptr_t aArg3,
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uintptr_t aResult, uint32_t aNumHotFramesToSkip)
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{
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static bool once = false;
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if (once) {
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return;
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}
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once = true;
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// On Leopard dladdr returns the wrong value for "new_sem_from_pool". The
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// stack shows up as having two pthread_cond_wait$UNIX2003 frames.
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const char* name = "new_sem_from_pool";
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MozStackWalk(stack_callback, /* skipFrames */ 0, /* maxFrames */ 0,
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const_cast<char*>(name), 0, nullptr);
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}
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// This is called from NS_LogInit() and from the stack walking functions, but
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// only the first call has any effect. We need to call this function from both
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// places because it must run before any mutexes are created, and also before
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// any objects whose refcounts we're logging are created. Running this
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// function during NS_LogInit() ensures that we meet the first criterion, and
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// running this function during the stack walking functions ensures we meet the
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// second criterion.
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MFBT_API void
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StackWalkInitCriticalAddress()
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{
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if (gCriticalAddress.mInit) {
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return;
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}
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gCriticalAddress.mInit = true;
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// We must not do work when 'new_sem_from_pool' calls realloc, since
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// it holds a non-reentrant spin-lock and we will quickly deadlock.
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// new_sem_from_pool is not directly accessible using dlsym, so
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// we force a situation where new_sem_from_pool is on the stack and
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// use dladdr to check the addresses.
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// malloc_logger can be set by external tools like 'Instruments' or 'leaks'
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malloc_logger_t* old_malloc_logger = malloc_logger;
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malloc_logger = my_malloc_logger;
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pthread_cond_t cond;
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int r = pthread_cond_init(&cond, 0);
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MOZ_ASSERT(r == 0);
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pthread_mutex_t mutex;
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r = pthread_mutex_init(&mutex, 0);
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MOZ_ASSERT(r == 0);
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r = pthread_mutex_lock(&mutex);
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MOZ_ASSERT(r == 0);
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struct timespec abstime = { 0, 1 };
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r = pthread_cond_timedwait_relative_np(&cond, &mutex, &abstime);
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// restore the previous malloc logger
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malloc_logger = old_malloc_logger;
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// On Lion, malloc is no longer called from pthread_cond_*wait*. This prevents
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// us from finding the address, but that is fine, since with no call to malloc
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// there is no critical address.
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#ifdef MOZ_WIDGET_COCOA
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MOZ_ASSERT(OnLionOrLater() || gCriticalAddress.mAddr != nullptr);
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#endif
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MOZ_ASSERT(r == ETIMEDOUT);
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r = pthread_mutex_unlock(&mutex);
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MOZ_ASSERT(r == 0);
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r = pthread_mutex_destroy(&mutex);
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MOZ_ASSERT(r == 0);
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r = pthread_cond_destroy(&cond);
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MOZ_ASSERT(r == 0);
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}
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static bool
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IsCriticalAddress(void* aPC)
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{
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return gCriticalAddress.mAddr == aPC;
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}
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#else
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static bool
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IsCriticalAddress(void* aPC)
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{
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return false;
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}
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// We still initialize gCriticalAddress.mInit so that this code behaves
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// the same on all platforms. Otherwise a failure to init would be visible
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// only on OS X.
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MFBT_API void
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StackWalkInitCriticalAddress()
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{
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gCriticalAddress.mInit = true;
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}
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#endif
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#if defined(_WIN32) && (defined(_M_IX86) || defined(_M_AMD64) || defined(_M_IA64)) // WIN32 x86 stack walking code
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#include <windows.h>
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#include <process.h>
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#include <stdio.h>
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#include <malloc.h>
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#include "mozilla/ArrayUtils.h"
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#include <imagehlp.h>
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// We need a way to know if we are building for WXP (or later), as if we are, we
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// need to use the newer 64-bit APIs. API_VERSION_NUMBER seems to fit the bill.
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// A value of 9 indicates we want to use the new APIs.
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#if API_VERSION_NUMBER < 9
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#error Too old imagehlp.h
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#endif
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struct WalkStackData
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{
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// Are we walking the stack of the calling thread? Note that we need to avoid
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// calling fprintf and friends if this is false, in order to avoid deadlocks.
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bool walkCallingThread;
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uint32_t skipFrames;
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HANDLE thread;
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HANDLE process;
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HANDLE eventStart;
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HANDLE eventEnd;
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void** pcs;
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uint32_t pc_size;
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uint32_t pc_count;
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uint32_t pc_max;
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void** sps;
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uint32_t sp_size;
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uint32_t sp_count;
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void* platformData;
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};
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DWORD gStackWalkThread;
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CRITICAL_SECTION gDbgHelpCS;
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// Routine to print an error message to standard error.
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static void
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PrintError(const char* aPrefix)
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{
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LPVOID lpMsgBuf;
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DWORD lastErr = GetLastError();
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FormatMessageA(
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FORMAT_MESSAGE_ALLOCATE_BUFFER | FORMAT_MESSAGE_FROM_SYSTEM | FORMAT_MESSAGE_IGNORE_INSERTS,
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nullptr,
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lastErr,
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MAKELANGID(LANG_NEUTRAL, SUBLANG_DEFAULT), // Default language
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(LPSTR)&lpMsgBuf,
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0,
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nullptr
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);
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fprintf(stderr, "### ERROR: %s: %s",
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aPrefix, lpMsgBuf ? lpMsgBuf : "(null)\n");
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fflush(stderr);
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LocalFree(lpMsgBuf);
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}
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static unsigned int WINAPI WalkStackThread(void* aData);
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static bool
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EnsureWalkThreadReady()
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{
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static bool walkThreadReady = false;
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static HANDLE stackWalkThread = nullptr;
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static HANDLE readyEvent = nullptr;
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if (walkThreadReady) {
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return walkThreadReady;
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}
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if (!stackWalkThread) {
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readyEvent = ::CreateEvent(nullptr, FALSE /* auto-reset*/,
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FALSE /* initially non-signaled */,
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nullptr);
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if (!readyEvent) {
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PrintError("CreateEvent");
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return false;
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}
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unsigned int threadID;
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stackWalkThread = (HANDLE)_beginthreadex(nullptr, 0, WalkStackThread,
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(void*)readyEvent, 0, &threadID);
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if (!stackWalkThread) {
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PrintError("CreateThread");
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::CloseHandle(readyEvent);
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readyEvent = nullptr;
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return false;
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}
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gStackWalkThread = threadID;
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::CloseHandle(stackWalkThread);
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}
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MOZ_ASSERT((stackWalkThread && readyEvent) ||
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(!stackWalkThread && !readyEvent));
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// The thread was created. Try to wait an arbitrary amount of time (1 second
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// should be enough) for its event loop to start before posting events to it.
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DWORD waitRet = ::WaitForSingleObject(readyEvent, 1000);
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if (waitRet == WAIT_TIMEOUT) {
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// We get a timeout if we're called during static initialization because
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// the thread will only start executing after we return so it couldn't
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// have signalled the event. If that is the case, give up for now and
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// try again next time we're called.
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return false;
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}
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::CloseHandle(readyEvent);
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stackWalkThread = nullptr;
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readyEvent = nullptr;
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::InitializeCriticalSection(&gDbgHelpCS);
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return walkThreadReady = true;
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}
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static void
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WalkStackMain64(struct WalkStackData* aData)
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{
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// Get a context for the specified thread.
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CONTEXT context;
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if (!aData->platformData) {
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memset(&context, 0, sizeof(CONTEXT));
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context.ContextFlags = CONTEXT_FULL;
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if (!GetThreadContext(aData->thread, &context)) {
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if (aData->walkCallingThread) {
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PrintError("GetThreadContext");
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}
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return;
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}
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} else {
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context = *static_cast<CONTEXT*>(aData->platformData);
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}
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#if defined(_M_IX86) || defined(_M_IA64)
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// Setup initial stack frame to walk from.
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STACKFRAME64 frame64;
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memset(&frame64, 0, sizeof(frame64));
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#ifdef _M_IX86
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frame64.AddrPC.Offset = context.Eip;
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frame64.AddrStack.Offset = context.Esp;
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frame64.AddrFrame.Offset = context.Ebp;
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#elif defined _M_IA64
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frame64.AddrPC.Offset = context.StIIP;
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frame64.AddrStack.Offset = context.SP;
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frame64.AddrFrame.Offset = context.RsBSP;
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#endif
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frame64.AddrPC.Mode = AddrModeFlat;
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frame64.AddrStack.Mode = AddrModeFlat;
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frame64.AddrFrame.Mode = AddrModeFlat;
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frame64.AddrReturn.Mode = AddrModeFlat;
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#endif
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// Skip our own stack walking frames.
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int skip = (aData->walkCallingThread ? 3 : 0) + aData->skipFrames;
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// Now walk the stack.
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while (true) {
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DWORD64 addr;
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DWORD64 spaddr;
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#if defined(_M_IX86) || defined(_M_IA64)
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// 32-bit frame unwinding.
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// Debug routines are not threadsafe, so grab the lock.
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EnterCriticalSection(&gDbgHelpCS);
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BOOL ok = StackWalk64(
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#if defined _M_IA64
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IMAGE_FILE_MACHINE_IA64,
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#elif defined _M_IX86
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IMAGE_FILE_MACHINE_I386,
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#endif
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aData->process,
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aData->thread,
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&frame64,
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&context,
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nullptr,
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SymFunctionTableAccess64, // function table access routine
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SymGetModuleBase64, // module base routine
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0
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);
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LeaveCriticalSection(&gDbgHelpCS);
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if (ok) {
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addr = frame64.AddrPC.Offset;
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spaddr = frame64.AddrStack.Offset;
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} else {
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addr = 0;
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spaddr = 0;
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if (aData->walkCallingThread) {
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PrintError("WalkStack64");
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}
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}
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if (!ok) {
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break;
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}
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#elif defined(_M_AMD64)
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// 64-bit frame unwinding.
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// Try to look up unwind metadata for the current function.
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ULONG64 imageBase;
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PRUNTIME_FUNCTION runtimeFunction =
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RtlLookupFunctionEntry(context.Rip, &imageBase, NULL);
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if (!runtimeFunction) {
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// Alas, this is probably a JIT frame, for which we don't generate unwind
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// info and so we have to give up.
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break;
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}
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PVOID dummyHandlerData;
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ULONG64 dummyEstablisherFrame;
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RtlVirtualUnwind(UNW_FLAG_NHANDLER,
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imageBase,
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context.Rip,
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runtimeFunction,
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&context,
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&dummyHandlerData,
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&dummyEstablisherFrame,
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nullptr);
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addr = context.Rip;
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spaddr = context.Rsp;
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#else
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#error "unknown platform"
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#endif
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if (addr == 0) {
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break;
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}
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if (skip-- > 0) {
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continue;
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}
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if (aData->pc_count < aData->pc_size) {
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aData->pcs[aData->pc_count] = (void*)addr;
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}
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++aData->pc_count;
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if (aData->sp_count < aData->sp_size) {
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aData->sps[aData->sp_count] = (void*)spaddr;
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}
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++aData->sp_count;
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if (aData->pc_max != 0 && aData->pc_count == aData->pc_max) {
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break;
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}
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#if defined(_M_IX86) || defined(_M_IA64)
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if (frame64.AddrReturn.Offset == 0) {
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break;
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}
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#endif
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}
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}
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static unsigned int WINAPI
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WalkStackThread(void* aData)
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{
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BOOL msgRet;
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MSG msg;
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// Call PeekMessage to force creation of a message queue so that
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// other threads can safely post events to us.
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::PeekMessage(&msg, nullptr, WM_USER, WM_USER, PM_NOREMOVE);
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// and tell the thread that created us that we're ready.
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HANDLE readyEvent = (HANDLE)aData;
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::SetEvent(readyEvent);
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while ((msgRet = ::GetMessage(&msg, (HWND)-1, 0, 0)) != 0) {
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if (msgRet == -1) {
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PrintError("GetMessage");
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} else {
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DWORD ret;
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struct WalkStackData* data = (WalkStackData*)msg.lParam;
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if (!data) {
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continue;
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}
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// Don't suspend the calling thread until it's waiting for
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// us; otherwise the number of frames on the stack could vary.
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ret = ::WaitForSingleObject(data->eventStart, INFINITE);
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if (ret != WAIT_OBJECT_0) {
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PrintError("WaitForSingleObject");
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}
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// Suspend the calling thread, dump his stack, and then resume him.
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// He's currently waiting for us to finish so now should be a good time.
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ret = ::SuspendThread(data->thread);
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if (ret == -1) {
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PrintError("ThreadSuspend");
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} else {
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WalkStackMain64(data);
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ret = ::ResumeThread(data->thread);
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if (ret == -1) {
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PrintError("ThreadResume");
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}
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}
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::SetEvent(data->eventEnd);
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}
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}
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return 0;
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}
|
|
|
|
/**
|
|
* Walk the stack, translating PC's found into strings and recording the
|
|
* chain in aBuffer. For this to work properly, the DLLs must be rebased
|
|
* so that the address in the file agrees with the address in memory.
|
|
* Otherwise StackWalk will return FALSE when it hits a frame in a DLL
|
|
* whose in memory address doesn't match its in-file address.
|
|
*/
|
|
|
|
MFBT_API bool
|
|
MozStackWalk(MozWalkStackCallback aCallback, uint32_t aSkipFrames,
|
|
uint32_t aMaxFrames, void* aClosure, uintptr_t aThread,
|
|
void* aPlatformData)
|
|
{
|
|
StackWalkInitCriticalAddress();
|
|
static HANDLE myProcess = nullptr;
|
|
HANDLE myThread;
|
|
DWORD walkerReturn;
|
|
struct WalkStackData data;
|
|
|
|
if (!EnsureWalkThreadReady()) {
|
|
return false;
|
|
}
|
|
|
|
HANDLE currentThread = ::GetCurrentThread();
|
|
HANDLE targetThread =
|
|
aThread ? reinterpret_cast<HANDLE>(aThread) : currentThread;
|
|
data.walkCallingThread = (targetThread == currentThread);
|
|
|
|
// Have to duplicate handle to get a real handle.
|
|
if (!myProcess) {
|
|
if (!::DuplicateHandle(::GetCurrentProcess(),
|
|
::GetCurrentProcess(),
|
|
::GetCurrentProcess(),
|
|
&myProcess,
|
|
PROCESS_ALL_ACCESS, FALSE, 0)) {
|
|
if (data.walkCallingThread) {
|
|
PrintError("DuplicateHandle (process)");
|
|
}
|
|
return false;
|
|
}
|
|
}
|
|
if (!::DuplicateHandle(::GetCurrentProcess(),
|
|
targetThread,
|
|
::GetCurrentProcess(),
|
|
&myThread,
|
|
THREAD_ALL_ACCESS, FALSE, 0)) {
|
|
if (data.walkCallingThread) {
|
|
PrintError("DuplicateHandle (thread)");
|
|
}
|
|
return false;
|
|
}
|
|
|
|
data.skipFrames = aSkipFrames;
|
|
data.thread = myThread;
|
|
data.process = myProcess;
|
|
void* local_pcs[1024];
|
|
data.pcs = local_pcs;
|
|
data.pc_count = 0;
|
|
data.pc_size = ArrayLength(local_pcs);
|
|
data.pc_max = aMaxFrames;
|
|
void* local_sps[1024];
|
|
data.sps = local_sps;
|
|
data.sp_count = 0;
|
|
data.sp_size = ArrayLength(local_sps);
|
|
data.platformData = aPlatformData;
|
|
|
|
if (aThread) {
|
|
// If we're walking the stack of another thread, we don't need to
|
|
// use a separate walker thread.
|
|
WalkStackMain64(&data);
|
|
|
|
if (data.pc_count > data.pc_size) {
|
|
data.pcs = (void**)_alloca(data.pc_count * sizeof(void*));
|
|
data.pc_size = data.pc_count;
|
|
data.pc_count = 0;
|
|
data.sps = (void**)_alloca(data.sp_count * sizeof(void*));
|
|
data.sp_size = data.sp_count;
|
|
data.sp_count = 0;
|
|
WalkStackMain64(&data);
|
|
}
|
|
} else {
|
|
data.eventStart = ::CreateEvent(nullptr, FALSE /* auto-reset*/,
|
|
FALSE /* initially non-signaled */, nullptr);
|
|
data.eventEnd = ::CreateEvent(nullptr, FALSE /* auto-reset*/,
|
|
FALSE /* initially non-signaled */, nullptr);
|
|
|
|
::PostThreadMessage(gStackWalkThread, WM_USER, 0, (LPARAM)&data);
|
|
|
|
walkerReturn = ::SignalObjectAndWait(data.eventStart,
|
|
data.eventEnd, INFINITE, FALSE);
|
|
if (walkerReturn != WAIT_OBJECT_0 && data.walkCallingThread) {
|
|
PrintError("SignalObjectAndWait (1)");
|
|
}
|
|
if (data.pc_count > data.pc_size) {
|
|
data.pcs = (void**)_alloca(data.pc_count * sizeof(void*));
|
|
data.pc_size = data.pc_count;
|
|
data.pc_count = 0;
|
|
data.sps = (void**)_alloca(data.sp_count * sizeof(void*));
|
|
data.sp_size = data.sp_count;
|
|
data.sp_count = 0;
|
|
::PostThreadMessage(gStackWalkThread, WM_USER, 0, (LPARAM)&data);
|
|
walkerReturn = ::SignalObjectAndWait(data.eventStart,
|
|
data.eventEnd, INFINITE, FALSE);
|
|
if (walkerReturn != WAIT_OBJECT_0 && data.walkCallingThread) {
|
|
PrintError("SignalObjectAndWait (2)");
|
|
}
|
|
}
|
|
|
|
::CloseHandle(data.eventStart);
|
|
::CloseHandle(data.eventEnd);
|
|
}
|
|
|
|
::CloseHandle(myThread);
|
|
|
|
for (uint32_t i = 0; i < data.pc_count; ++i) {
|
|
(*aCallback)(i + 1, data.pcs[i], data.sps[i], aClosure);
|
|
}
|
|
|
|
return data.pc_count != 0;
|
|
}
|
|
|
|
|
|
static BOOL CALLBACK
|
|
callbackEspecial64(
|
|
PCSTR aModuleName,
|
|
DWORD64 aModuleBase,
|
|
ULONG aModuleSize,
|
|
PVOID aUserContext)
|
|
{
|
|
BOOL retval = TRUE;
|
|
DWORD64 addr = *(DWORD64*)aUserContext;
|
|
|
|
/*
|
|
* You'll want to control this if we are running on an
|
|
* architecture where the addresses go the other direction.
|
|
* Not sure this is even a realistic consideration.
|
|
*/
|
|
const BOOL addressIncreases = TRUE;
|
|
|
|
/*
|
|
* If it falls in side the known range, load the symbols.
|
|
*/
|
|
if (addressIncreases
|
|
? (addr >= aModuleBase && addr <= (aModuleBase + aModuleSize))
|
|
: (addr <= aModuleBase && addr >= (aModuleBase - aModuleSize))
|
|
) {
|
|
retval = !!SymLoadModule64(GetCurrentProcess(), nullptr,
|
|
(PSTR)aModuleName, nullptr,
|
|
aModuleBase, aModuleSize);
|
|
if (!retval) {
|
|
PrintError("SymLoadModule64");
|
|
}
|
|
}
|
|
|
|
return retval;
|
|
}
|
|
|
|
/*
|
|
* SymGetModuleInfoEspecial
|
|
*
|
|
* Attempt to determine the module information.
|
|
* Bug 112196 says this DLL may not have been loaded at the time
|
|
* SymInitialize was called, and thus the module information
|
|
* and symbol information is not available.
|
|
* This code rectifies that problem.
|
|
*/
|
|
|
|
// New members were added to IMAGEHLP_MODULE64 (that show up in the
|
|
// Platform SDK that ships with VC8, but not the Platform SDK that ships
|
|
// with VC7.1, i.e., between DbgHelp 6.0 and 6.1), but we don't need to
|
|
// use them, and it's useful to be able to function correctly with the
|
|
// older library. (Stock Windows XP SP2 seems to ship with dbghelp.dll
|
|
// version 5.1.) Since Platform SDK version need not correspond to
|
|
// compiler version, and the version number in debughlp.h was NOT bumped
|
|
// when these changes were made, ifdef based on a constant that was
|
|
// added between these versions.
|
|
#ifdef SSRVOPT_SETCONTEXT
|
|
#define NS_IMAGEHLP_MODULE64_SIZE (((offsetof(IMAGEHLP_MODULE64, LoadedPdbName) + sizeof(DWORD64) - 1) / sizeof(DWORD64)) * sizeof(DWORD64))
|
|
#else
|
|
#define NS_IMAGEHLP_MODULE64_SIZE sizeof(IMAGEHLP_MODULE64)
|
|
#endif
|
|
|
|
BOOL SymGetModuleInfoEspecial64(HANDLE aProcess, DWORD64 aAddr,
|
|
PIMAGEHLP_MODULE64 aModuleInfo,
|
|
PIMAGEHLP_LINE64 aLineInfo)
|
|
{
|
|
BOOL retval = FALSE;
|
|
|
|
/*
|
|
* Init the vars if we have em.
|
|
*/
|
|
aModuleInfo->SizeOfStruct = NS_IMAGEHLP_MODULE64_SIZE;
|
|
if (aLineInfo) {
|
|
aLineInfo->SizeOfStruct = sizeof(IMAGEHLP_LINE64);
|
|
}
|
|
|
|
/*
|
|
* Give it a go.
|
|
* It may already be loaded.
|
|
*/
|
|
retval = SymGetModuleInfo64(aProcess, aAddr, aModuleInfo);
|
|
if (retval == FALSE) {
|
|
/*
|
|
* Not loaded, here's the magic.
|
|
* Go through all the modules.
|
|
*/
|
|
// Need to cast to PENUMLOADED_MODULES_CALLBACK64 because the
|
|
// constness of the first parameter of
|
|
// PENUMLOADED_MODULES_CALLBACK64 varies over SDK versions (from
|
|
// non-const to const over time). See bug 391848 and bug
|
|
// 415426.
|
|
BOOL enumRes = EnumerateLoadedModules64(
|
|
aProcess,
|
|
(PENUMLOADED_MODULES_CALLBACK64)callbackEspecial64,
|
|
(PVOID)&aAddr);
|
|
if (enumRes != FALSE) {
|
|
/*
|
|
* One final go.
|
|
* If it fails, then well, we have other problems.
|
|
*/
|
|
retval = SymGetModuleInfo64(aProcess, aAddr, aModuleInfo);
|
|
}
|
|
}
|
|
|
|
/*
|
|
* If we got module info, we may attempt line info as well.
|
|
* We will not report failure if this does not work.
|
|
*/
|
|
if (retval != FALSE && aLineInfo) {
|
|
DWORD displacement = 0;
|
|
BOOL lineRes = FALSE;
|
|
lineRes = SymGetLineFromAddr64(aProcess, aAddr, &displacement, aLineInfo);
|
|
if (!lineRes) {
|
|
// Clear out aLineInfo to indicate that it's not valid
|
|
memset(aLineInfo, 0, sizeof(*aLineInfo));
|
|
}
|
|
}
|
|
|
|
return retval;
|
|
}
|
|
|
|
static bool
|
|
EnsureSymInitialized()
|
|
{
|
|
static bool gInitialized = false;
|
|
bool retStat;
|
|
|
|
if (gInitialized) {
|
|
return gInitialized;
|
|
}
|
|
|
|
if (!EnsureWalkThreadReady()) {
|
|
return false;
|
|
}
|
|
|
|
SymSetOptions(SYMOPT_LOAD_LINES | SYMOPT_UNDNAME);
|
|
retStat = SymInitialize(GetCurrentProcess(), nullptr, TRUE);
|
|
if (!retStat) {
|
|
PrintError("SymInitialize");
|
|
}
|
|
|
|
gInitialized = retStat;
|
|
/* XXX At some point we need to arrange to call SymCleanup */
|
|
|
|
return retStat;
|
|
}
|
|
|
|
|
|
MFBT_API bool
|
|
MozDescribeCodeAddress(void* aPC, MozCodeAddressDetails* aDetails)
|
|
{
|
|
aDetails->library[0] = '\0';
|
|
aDetails->loffset = 0;
|
|
aDetails->filename[0] = '\0';
|
|
aDetails->lineno = 0;
|
|
aDetails->function[0] = '\0';
|
|
aDetails->foffset = 0;
|
|
|
|
if (!EnsureSymInitialized()) {
|
|
return false;
|
|
}
|
|
|
|
HANDLE myProcess = ::GetCurrentProcess();
|
|
BOOL ok;
|
|
|
|
// debug routines are not threadsafe, so grab the lock.
|
|
EnterCriticalSection(&gDbgHelpCS);
|
|
|
|
//
|
|
// Attempt to load module info before we attempt to resolve the symbol.
|
|
// This just makes sure we get good info if available.
|
|
//
|
|
|
|
DWORD64 addr = (DWORD64)aPC;
|
|
IMAGEHLP_MODULE64 modInfo;
|
|
IMAGEHLP_LINE64 lineInfo;
|
|
BOOL modInfoRes;
|
|
modInfoRes = SymGetModuleInfoEspecial64(myProcess, addr, &modInfo, &lineInfo);
|
|
|
|
if (modInfoRes) {
|
|
strncpy(aDetails->library, modInfo.LoadedImageName,
|
|
sizeof(aDetails->library));
|
|
aDetails->library[mozilla::ArrayLength(aDetails->library) - 1] = '\0';
|
|
aDetails->loffset = (char*)aPC - (char*)modInfo.BaseOfImage;
|
|
|
|
if (lineInfo.FileName) {
|
|
strncpy(aDetails->filename, lineInfo.FileName,
|
|
sizeof(aDetails->filename));
|
|
aDetails->filename[mozilla::ArrayLength(aDetails->filename) - 1] = '\0';
|
|
aDetails->lineno = lineInfo.LineNumber;
|
|
}
|
|
}
|
|
|
|
ULONG64 buffer[(sizeof(SYMBOL_INFO) +
|
|
MAX_SYM_NAME * sizeof(TCHAR) + sizeof(ULONG64) - 1) / sizeof(ULONG64)];
|
|
PSYMBOL_INFO pSymbol = (PSYMBOL_INFO)buffer;
|
|
pSymbol->SizeOfStruct = sizeof(SYMBOL_INFO);
|
|
pSymbol->MaxNameLen = MAX_SYM_NAME;
|
|
|
|
DWORD64 displacement;
|
|
ok = SymFromAddr(myProcess, addr, &displacement, pSymbol);
|
|
|
|
if (ok) {
|
|
strncpy(aDetails->function, pSymbol->Name,
|
|
sizeof(aDetails->function));
|
|
aDetails->function[mozilla::ArrayLength(aDetails->function) - 1] = '\0';
|
|
aDetails->foffset = static_cast<ptrdiff_t>(displacement);
|
|
}
|
|
|
|
LeaveCriticalSection(&gDbgHelpCS); // release our lock
|
|
return true;
|
|
}
|
|
|
|
// i386 or PPC Linux stackwalking code
|
|
#elif HAVE_DLADDR && (HAVE__UNWIND_BACKTRACE || MOZ_STACKWALK_SUPPORTS_LINUX || MOZ_STACKWALK_SUPPORTS_MACOSX)
|
|
|
|
#include <stdlib.h>
|
|
#include <string.h>
|
|
#include <stdio.h>
|
|
|
|
// On glibc 2.1, the Dl_info api defined in <dlfcn.h> is only exposed
|
|
// if __USE_GNU is defined. I suppose its some kind of standards
|
|
// adherence thing.
|
|
//
|
|
#if (__GLIBC_MINOR__ >= 1) && !defined(__USE_GNU)
|
|
#define __USE_GNU
|
|
#endif
|
|
|
|
// This thing is exported by libstdc++
|
|
// Yes, this is a gcc only hack
|
|
#if defined(MOZ_DEMANGLE_SYMBOLS)
|
|
#include <cxxabi.h>
|
|
#endif // MOZ_DEMANGLE_SYMBOLS
|
|
|
|
void DemangleSymbol(const char* aSymbol,
|
|
char* aBuffer,
|
|
int aBufLen)
|
|
{
|
|
aBuffer[0] = '\0';
|
|
|
|
#if defined(MOZ_DEMANGLE_SYMBOLS)
|
|
/* See demangle.h in the gcc source for the voodoo */
|
|
char* demangled = abi::__cxa_demangle(aSymbol, 0, 0, 0);
|
|
|
|
if (demangled) {
|
|
strncpy(aBuffer, demangled, aBufLen);
|
|
aBuffer[aBufLen - 1] = '\0';
|
|
free(demangled);
|
|
}
|
|
#endif // MOZ_DEMANGLE_SYMBOLS
|
|
}
|
|
|
|
#define X86_OR_PPC (defined(__i386) || defined(PPC) || defined(__ppc__))
|
|
#if X86_OR_PPC && (MOZ_STACKWALK_SUPPORTS_MACOSX || MOZ_STACKWALK_SUPPORTS_LINUX) // i386 or PPC Linux or Mac stackwalking code
|
|
|
|
MFBT_API bool
|
|
MozStackWalk(MozWalkStackCallback aCallback, uint32_t aSkipFrames,
|
|
uint32_t aMaxFrames, void* aClosure, uintptr_t aThread,
|
|
void* aPlatformData)
|
|
{
|
|
MOZ_ASSERT(!aThread);
|
|
MOZ_ASSERT(!aPlatformData);
|
|
StackWalkInitCriticalAddress();
|
|
|
|
// Get the frame pointer
|
|
void** bp = (void**)__builtin_frame_address(0);
|
|
|
|
void* stackEnd;
|
|
#if HAVE___LIBC_STACK_END
|
|
stackEnd = __libc_stack_end;
|
|
#elif defined(XP_DARWIN)
|
|
stackEnd = pthread_get_stackaddr_np(pthread_self());
|
|
#elif defined(ANDROID)
|
|
pthread_attr_t sattr;
|
|
pthread_attr_init(&sattr);
|
|
pthread_getattr_np(pthread_self(), &sattr);
|
|
void* stackBase = stackEnd = nullptr;
|
|
size_t stackSize = 0;
|
|
if (gettid() != getpid()) {
|
|
// bionic's pthread_attr_getstack doesn't tell the truth for the main
|
|
// thread (see bug 846670). So don't use it for the main thread.
|
|
if (!pthread_attr_getstack(&sattr, &stackBase, &stackSize)) {
|
|
stackEnd = static_cast<char*>(stackBase) + stackSize;
|
|
} else {
|
|
stackEnd = nullptr;
|
|
}
|
|
}
|
|
if (!stackEnd) {
|
|
// So consider the current frame pointer + an arbitrary size of 8MB
|
|
// (modulo overflow ; not really arbitrary as it's the default stack
|
|
// size for the main thread) if pthread_attr_getstack failed for
|
|
// some reason (or was skipped).
|
|
static const uintptr_t kMaxStackSize = 8 * 1024 * 1024;
|
|
uintptr_t maxStackStart = uintptr_t(-1) - kMaxStackSize;
|
|
uintptr_t stackStart = std::max(maxStackStart, uintptr_t(bp));
|
|
stackEnd = reinterpret_cast<void*>(stackStart + kMaxStackSize);
|
|
}
|
|
#else
|
|
# error Unsupported configuration
|
|
#endif
|
|
return FramePointerStackWalk(aCallback, aSkipFrames, aMaxFrames,
|
|
aClosure, bp, stackEnd);
|
|
}
|
|
|
|
#elif defined(HAVE__UNWIND_BACKTRACE)
|
|
|
|
// libgcc_s.so symbols _Unwind_Backtrace@@GCC_3.3 and _Unwind_GetIP@@GCC_3.0
|
|
#include <unwind.h>
|
|
|
|
struct unwind_info
|
|
{
|
|
MozWalkStackCallback callback;
|
|
int skip;
|
|
int maxFrames;
|
|
int numFrames;
|
|
bool isCriticalAbort;
|
|
void* closure;
|
|
};
|
|
|
|
static _Unwind_Reason_Code
|
|
unwind_callback(struct _Unwind_Context* context, void* closure)
|
|
{
|
|
unwind_info* info = static_cast<unwind_info*>(closure);
|
|
void* pc = reinterpret_cast<void*>(_Unwind_GetIP(context));
|
|
// TODO Use something like '_Unwind_GetGR()' to get the stack pointer.
|
|
if (IsCriticalAddress(pc)) {
|
|
info->isCriticalAbort = true;
|
|
// We just want to stop the walk, so any error code will do. Using
|
|
// _URC_NORMAL_STOP would probably be the most accurate, but it is not
|
|
// defined on Android for ARM.
|
|
return _URC_FOREIGN_EXCEPTION_CAUGHT;
|
|
}
|
|
if (--info->skip < 0) {
|
|
info->numFrames++;
|
|
(*info->callback)(info->numFrames, pc, nullptr, info->closure);
|
|
if (info->maxFrames != 0 && info->numFrames == info->maxFrames) {
|
|
// Again, any error code that stops the walk will do.
|
|
return _URC_FOREIGN_EXCEPTION_CAUGHT;
|
|
}
|
|
}
|
|
return _URC_NO_REASON;
|
|
}
|
|
|
|
MFBT_API bool
|
|
MozStackWalk(MozWalkStackCallback aCallback, uint32_t aSkipFrames,
|
|
uint32_t aMaxFrames, void* aClosure, uintptr_t aThread,
|
|
void* aPlatformData)
|
|
{
|
|
MOZ_ASSERT(!aThread);
|
|
MOZ_ASSERT(!aPlatformData);
|
|
StackWalkInitCriticalAddress();
|
|
unwind_info info;
|
|
info.callback = aCallback;
|
|
info.skip = aSkipFrames + 1;
|
|
info.maxFrames = aMaxFrames;
|
|
info.numFrames = 0;
|
|
info.isCriticalAbort = false;
|
|
info.closure = aClosure;
|
|
|
|
(void)_Unwind_Backtrace(unwind_callback, &info);
|
|
|
|
// We ignore the return value from _Unwind_Backtrace and instead determine
|
|
// the outcome from |info|. There are two main reasons for this:
|
|
// - On ARM/Android bionic's _Unwind_Backtrace usually (always?) returns
|
|
// _URC_FAILURE. See
|
|
// https://bugzilla.mozilla.org/show_bug.cgi?id=717853#c110.
|
|
// - If aMaxFrames != 0, we want to stop early, and the only way to do that
|
|
// is to make unwind_callback return something other than _URC_NO_REASON,
|
|
// which causes _Unwind_Backtrace to return a non-success code.
|
|
if (info.isCriticalAbort) {
|
|
return false;
|
|
}
|
|
return info.numFrames != 0;
|
|
}
|
|
|
|
#endif
|
|
|
|
bool MFBT_API
|
|
MozDescribeCodeAddress(void* aPC, MozCodeAddressDetails* aDetails)
|
|
{
|
|
aDetails->library[0] = '\0';
|
|
aDetails->loffset = 0;
|
|
aDetails->filename[0] = '\0';
|
|
aDetails->lineno = 0;
|
|
aDetails->function[0] = '\0';
|
|
aDetails->foffset = 0;
|
|
|
|
Dl_info info;
|
|
int ok = dladdr(aPC, &info);
|
|
if (!ok) {
|
|
return true;
|
|
}
|
|
|
|
strncpy(aDetails->library, info.dli_fname, sizeof(aDetails->library));
|
|
aDetails->library[mozilla::ArrayLength(aDetails->library) - 1] = '\0';
|
|
aDetails->loffset = (char*)aPC - (char*)info.dli_fbase;
|
|
|
|
const char* symbol = info.dli_sname;
|
|
if (!symbol || symbol[0] == '\0') {
|
|
return true;
|
|
}
|
|
|
|
DemangleSymbol(symbol, aDetails->function, sizeof(aDetails->function));
|
|
|
|
if (aDetails->function[0] == '\0') {
|
|
// Just use the mangled symbol if demangling failed.
|
|
strncpy(aDetails->function, symbol, sizeof(aDetails->function));
|
|
aDetails->function[mozilla::ArrayLength(aDetails->function) - 1] = '\0';
|
|
}
|
|
|
|
aDetails->foffset = (char*)aPC - (char*)info.dli_saddr;
|
|
return true;
|
|
}
|
|
|
|
#else // unsupported platform.
|
|
|
|
MFBT_API bool
|
|
MozStackWalk(MozWalkStackCallback aCallback, uint32_t aSkipFrames,
|
|
uint32_t aMaxFrames, void* aClosure, uintptr_t aThread,
|
|
void* aPlatformData)
|
|
{
|
|
MOZ_ASSERT(!aThread);
|
|
MOZ_ASSERT(!aPlatformData);
|
|
return false;
|
|
}
|
|
|
|
MFBT_API bool
|
|
MozDescribeCodeAddress(void* aPC, MozCodeAddressDetails* aDetails)
|
|
{
|
|
aDetails->library[0] = '\0';
|
|
aDetails->loffset = 0;
|
|
aDetails->filename[0] = '\0';
|
|
aDetails->lineno = 0;
|
|
aDetails->function[0] = '\0';
|
|
aDetails->foffset = 0;
|
|
return false;
|
|
}
|
|
|
|
#endif
|
|
|
|
#if defined(XP_WIN) || defined (XP_MACOSX) || defined (XP_LINUX)
|
|
namespace mozilla {
|
|
bool
|
|
FramePointerStackWalk(MozWalkStackCallback aCallback, uint32_t aSkipFrames,
|
|
uint32_t aMaxFrames, void* aClosure, void** bp,
|
|
void* aStackEnd)
|
|
{
|
|
// Stack walking code courtesy Kipp's "leaky".
|
|
|
|
int32_t skip = aSkipFrames;
|
|
uint32_t numFrames = 0;
|
|
while (bp) {
|
|
void** next = (void**)*bp;
|
|
// bp may not be a frame pointer on i386 if code was compiled with
|
|
// -fomit-frame-pointer, so do some sanity checks.
|
|
// (bp should be a frame pointer on ppc(64) but checking anyway may help
|
|
// a little if the stack has been corrupted.)
|
|
// We don't need to check against the begining of the stack because
|
|
// we can assume that bp > sp
|
|
if (next <= bp ||
|
|
next > aStackEnd ||
|
|
(uintptr_t(next) & 3)) {
|
|
break;
|
|
}
|
|
#if (defined(__ppc__) && defined(XP_MACOSX)) || defined(__powerpc64__)
|
|
// ppc mac or powerpc64 linux
|
|
void* pc = *(bp + 2);
|
|
bp += 3;
|
|
#else // i386 or powerpc32 linux
|
|
void* pc = *(bp + 1);
|
|
bp += 2;
|
|
#endif
|
|
if (IsCriticalAddress(pc)) {
|
|
return false;
|
|
}
|
|
if (--skip < 0) {
|
|
// Assume that the SP points to the BP of the function
|
|
// it called. We can't know the exact location of the SP
|
|
// but this should be sufficient for our use the SP
|
|
// to order elements on the stack.
|
|
numFrames++;
|
|
(*aCallback)(numFrames, pc, bp, aClosure);
|
|
if (aMaxFrames != 0 && numFrames == aMaxFrames) {
|
|
break;
|
|
}
|
|
}
|
|
bp = next;
|
|
}
|
|
return numFrames != 0;
|
|
}
|
|
} // namespace mozilla
|
|
|
|
#else
|
|
|
|
namespace mozilla {
|
|
MFBT_API bool
|
|
FramePointerStackWalk(MozWalkStackCallback aCallback, uint32_t aSkipFrames,
|
|
void* aClosure, void** aBp)
|
|
{
|
|
return false;
|
|
}
|
|
}
|
|
|
|
#endif
|
|
|
|
MFBT_API void
|
|
MozFormatCodeAddressDetails(char* aBuffer, uint32_t aBufferSize,
|
|
uint32_t aFrameNumber, void* aPC,
|
|
const MozCodeAddressDetails* aDetails)
|
|
{
|
|
MozFormatCodeAddress(aBuffer, aBufferSize,
|
|
aFrameNumber, aPC, aDetails->function,
|
|
aDetails->library, aDetails->loffset,
|
|
aDetails->filename, aDetails->lineno);
|
|
}
|
|
|
|
MFBT_API void
|
|
MozFormatCodeAddress(char* aBuffer, uint32_t aBufferSize, uint32_t aFrameNumber,
|
|
const void* aPC, const char* aFunction,
|
|
const char* aLibrary, ptrdiff_t aLOffset,
|
|
const char* aFileName, uint32_t aLineNo)
|
|
{
|
|
const char* function = aFunction && aFunction[0] ? aFunction : "???";
|
|
if (aFileName && aFileName[0]) {
|
|
// We have a filename and (presumably) a line number. Use them.
|
|
snprintf(aBuffer, aBufferSize,
|
|
"#%02u: %s (%s:%u)",
|
|
aFrameNumber, function, aFileName, aLineNo);
|
|
} else if (aLibrary && aLibrary[0]) {
|
|
// We have no filename, but we do have a library name. Use it and the
|
|
// library offset, and print them in a way that scripts like
|
|
// fix_{linux,macosx}_stacks.py can easily post-process.
|
|
snprintf(aBuffer, aBufferSize,
|
|
"#%02u: %s[%s +0x%" PRIxPTR "]",
|
|
aFrameNumber, function, aLibrary, static_cast<uintptr_t>(aLOffset));
|
|
} else {
|
|
// We have nothing useful to go on. (The format string is split because
|
|
// '??)' is a trigraph and causes a warning, sigh.)
|
|
snprintf(aBuffer, aBufferSize,
|
|
"#%02u: ??? (???:???" ")",
|
|
aFrameNumber);
|
|
}
|
|
}
|