2567 lines
92 KiB
C++
2567 lines
92 KiB
C++
//===-- AppleObjCRuntimeV2.cpp ----------------------------------*- C++ -*-===//
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//
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// The LLVM Compiler Infrastructure
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//
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// This file is distributed under the University of Illinois Open Source
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// License. See LICENSE.TXT for details.
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//
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//===----------------------------------------------------------------------===//
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// C Includes
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#include <stdint.h>
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// C++ Includes
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#include <string>
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#include <vector>
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// Other libraries and framework includes
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#include "clang/AST/ASTContext.h"
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#include "clang/AST/DeclObjC.h"
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// Project includes
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#include "lldb/Core/ClangForward.h"
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#include "lldb/Host/OptionParser.h"
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#include "lldb/Symbol/CompilerType.h"
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#include "lldb/lldb-enumerations.h"
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#include "lldb/Core/ClangForward.h"
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#include "lldb/Core/Debugger.h"
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#include "lldb/Core/Module.h"
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#include "lldb/Core/PluginManager.h"
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#include "lldb/Core/Scalar.h"
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#include "lldb/Core/Section.h"
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#include "lldb/Core/ValueObjectVariable.h"
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#include "lldb/Expression/DiagnosticManager.h"
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#include "lldb/Expression/FunctionCaller.h"
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#include "lldb/Expression/UtilityFunction.h"
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#include "lldb/Interpreter/CommandObject.h"
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#include "lldb/Interpreter/CommandObjectMultiword.h"
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#include "lldb/Interpreter/CommandReturnObject.h"
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#include "lldb/Interpreter/OptionValueBoolean.h"
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#include "lldb/Symbol/ClangASTContext.h"
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#include "lldb/Symbol/ObjectFile.h"
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#include "lldb/Symbol/Symbol.h"
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#include "lldb/Symbol/TypeList.h"
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#include "lldb/Symbol/VariableList.h"
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#include "lldb/Target/ExecutionContext.h"
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#include "lldb/Target/Platform.h"
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#include "lldb/Target/Process.h"
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#include "lldb/Target/RegisterContext.h"
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#include "lldb/Target/Target.h"
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#include "lldb/Target/Thread.h"
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#include "lldb/Utility/ConstString.h"
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#include "lldb/Utility/Log.h"
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#include "lldb/Utility/Status.h"
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#include "lldb/Utility/Stream.h"
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#include "lldb/Utility/StreamString.h"
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#include "lldb/Utility/Timer.h"
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#include "AppleObjCClassDescriptorV2.h"
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#include "AppleObjCDeclVendor.h"
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#include "AppleObjCRuntimeV2.h"
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#include "AppleObjCTrampolineHandler.h"
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#include "AppleObjCTypeEncodingParser.h"
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#include "clang/AST/ASTContext.h"
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#include "clang/AST/DeclObjC.h"
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#include <vector>
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using namespace lldb;
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using namespace lldb_private;
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// 2 second timeout when running utility functions
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static constexpr std::chrono::seconds g_utility_function_timeout(2);
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static const char *g_get_dynamic_class_info_name =
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"__lldb_apple_objc_v2_get_dynamic_class_info";
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// Testing using the new C++11 raw string literals. If this breaks GCC then we
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// will
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// need to revert to the code above...
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static const char *g_get_dynamic_class_info_body = R"(
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extern "C"
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{
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size_t strlen(const char *);
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char *strncpy (char * s1, const char * s2, size_t n);
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int printf(const char * format, ...);
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}
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#define DEBUG_PRINTF(fmt, ...) if (should_log) printf(fmt, ## __VA_ARGS__)
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typedef struct _NXMapTable {
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void *prototype;
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unsigned num_classes;
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unsigned num_buckets_minus_one;
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void *buckets;
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} NXMapTable;
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#define NX_MAPNOTAKEY ((void *)(-1))
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typedef struct BucketInfo
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{
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const char *name_ptr;
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Class isa;
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} BucketInfo;
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struct ClassInfo
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{
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Class isa;
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uint32_t hash;
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} __attribute__((__packed__));
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uint32_t
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__lldb_apple_objc_v2_get_dynamic_class_info (void *gdb_objc_realized_classes_ptr,
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void *class_infos_ptr,
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uint32_t class_infos_byte_size,
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uint32_t should_log)
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{
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DEBUG_PRINTF ("gdb_objc_realized_classes_ptr = %p\n", gdb_objc_realized_classes_ptr);
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DEBUG_PRINTF ("class_infos_ptr = %p\n", class_infos_ptr);
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DEBUG_PRINTF ("class_infos_byte_size = %u\n", class_infos_byte_size);
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const NXMapTable *grc = (const NXMapTable *)gdb_objc_realized_classes_ptr;
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if (grc)
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{
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const unsigned num_classes = grc->num_classes;
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if (class_infos_ptr)
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{
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const size_t max_class_infos = class_infos_byte_size/sizeof(ClassInfo);
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ClassInfo *class_infos = (ClassInfo *)class_infos_ptr;
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BucketInfo *buckets = (BucketInfo *)grc->buckets;
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uint32_t idx = 0;
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for (unsigned i=0; i<=grc->num_buckets_minus_one; ++i)
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{
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if (buckets[i].name_ptr != NX_MAPNOTAKEY)
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{
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if (idx < max_class_infos)
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{
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const char *s = buckets[i].name_ptr;
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uint32_t h = 5381;
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for (unsigned char c = *s; c; c = *++s)
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h = ((h << 5) + h) + c;
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class_infos[idx].hash = h;
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class_infos[idx].isa = buckets[i].isa;
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}
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++idx;
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}
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}
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if (idx < max_class_infos)
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{
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class_infos[idx].isa = NULL;
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class_infos[idx].hash = 0;
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}
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}
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return num_classes;
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}
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return 0;
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}
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)";
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static const char *g_get_shared_cache_class_info_name =
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"__lldb_apple_objc_v2_get_shared_cache_class_info";
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// Testing using the new C++11 raw string literals. If this breaks GCC then we
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// will
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// need to revert to the code above...
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static const char *g_get_shared_cache_class_info_body = R"(
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extern "C"
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{
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const char *class_getName(void *objc_class);
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size_t strlen(const char *);
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char *strncpy (char * s1, const char * s2, size_t n);
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int printf(const char * format, ...);
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}
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#define DEBUG_PRINTF(fmt, ...) if (should_log) printf(fmt, ## __VA_ARGS__)
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struct objc_classheader_t {
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int32_t clsOffset;
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int32_t hiOffset;
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};
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struct objc_clsopt_t {
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uint32_t capacity;
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uint32_t occupied;
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uint32_t shift;
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uint32_t mask;
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uint32_t zero;
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uint32_t unused;
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uint64_t salt;
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uint32_t scramble[256];
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uint8_t tab[0]; // tab[mask+1]
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// uint8_t checkbytes[capacity];
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// int32_t offset[capacity];
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// objc_classheader_t clsOffsets[capacity];
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// uint32_t duplicateCount;
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// objc_classheader_t duplicateOffsets[duplicateCount];
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};
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struct objc_opt_t {
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uint32_t version;
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int32_t selopt_offset;
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int32_t headeropt_offset;
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int32_t clsopt_offset;
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};
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struct objc_opt_v14_t {
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uint32_t version;
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uint32_t flags;
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int32_t selopt_offset;
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int32_t headeropt_offset;
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int32_t clsopt_offset;
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};
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struct ClassInfo
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{
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Class isa;
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uint32_t hash;
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} __attribute__((__packed__));
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uint32_t
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__lldb_apple_objc_v2_get_shared_cache_class_info (void *objc_opt_ro_ptr,
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void *class_infos_ptr,
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uint32_t class_infos_byte_size,
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uint32_t should_log)
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{
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uint32_t idx = 0;
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DEBUG_PRINTF ("objc_opt_ro_ptr = %p\n", objc_opt_ro_ptr);
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DEBUG_PRINTF ("class_infos_ptr = %p\n", class_infos_ptr);
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DEBUG_PRINTF ("class_infos_byte_size = %u (%llu class infos)\n", class_infos_byte_size, (uint64_t)(class_infos_byte_size/sizeof(ClassInfo)));
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if (objc_opt_ro_ptr)
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{
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const objc_opt_t *objc_opt = (objc_opt_t *)objc_opt_ro_ptr;
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const objc_opt_v14_t* objc_opt_v14 = (objc_opt_v14_t*)objc_opt_ro_ptr;
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const bool is_v14_format = objc_opt->version >= 14;
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if (is_v14_format)
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{
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DEBUG_PRINTF ("objc_opt->version = %u\n", objc_opt_v14->version);
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DEBUG_PRINTF ("objc_opt->flags = %u\n", objc_opt_v14->flags);
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DEBUG_PRINTF ("objc_opt->selopt_offset = %d\n", objc_opt_v14->selopt_offset);
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DEBUG_PRINTF ("objc_opt->headeropt_offset = %d\n", objc_opt_v14->headeropt_offset);
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DEBUG_PRINTF ("objc_opt->clsopt_offset = %d\n", objc_opt_v14->clsopt_offset);
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}
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else
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{
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DEBUG_PRINTF ("objc_opt->version = %u\n", objc_opt->version);
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DEBUG_PRINTF ("objc_opt->selopt_offset = %d\n", objc_opt->selopt_offset);
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DEBUG_PRINTF ("objc_opt->headeropt_offset = %d\n", objc_opt->headeropt_offset);
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DEBUG_PRINTF ("objc_opt->clsopt_offset = %d\n", objc_opt->clsopt_offset);
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}
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if (objc_opt->version == 12 || objc_opt->version == 13 || objc_opt->version == 14 || objc_opt->version == 15)
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{
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const objc_clsopt_t* clsopt = NULL;
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if (is_v14_format)
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clsopt = (const objc_clsopt_t*)((uint8_t *)objc_opt_v14 + objc_opt_v14->clsopt_offset);
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else
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clsopt = (const objc_clsopt_t*)((uint8_t *)objc_opt + objc_opt->clsopt_offset);
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const size_t max_class_infos = class_infos_byte_size/sizeof(ClassInfo);
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DEBUG_PRINTF("max_class_infos = %llu\n", (uint64_t)max_class_infos);
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ClassInfo *class_infos = (ClassInfo *)class_infos_ptr;
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int32_t invalidEntryOffset = 0;
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// this is safe to do because the version field order is invariant
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if (objc_opt->version == 12)
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invalidEntryOffset = 16;
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const uint8_t *checkbytes = &clsopt->tab[clsopt->mask+1];
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const int32_t *offsets = (const int32_t *)(checkbytes + clsopt->capacity);
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const objc_classheader_t *classOffsets = (const objc_classheader_t *)(offsets + clsopt->capacity);
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DEBUG_PRINTF ("clsopt->capacity = %u\n", clsopt->capacity);
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DEBUG_PRINTF ("clsopt->mask = 0x%8.8x\n", clsopt->mask);
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DEBUG_PRINTF ("classOffsets = %p\n", classOffsets);
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DEBUG_PRINTF("invalidEntryOffset = %d\n", invalidEntryOffset);
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for (uint32_t i=0; i<clsopt->capacity; ++i)
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{
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const int32_t clsOffset = classOffsets[i].clsOffset;
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DEBUG_PRINTF("clsOffset[%u] = %u\n", i, clsOffset);
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if (clsOffset & 1)
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{
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DEBUG_PRINTF("clsOffset & 1\n");
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continue; // duplicate
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}
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else if (clsOffset == invalidEntryOffset)
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{
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DEBUG_PRINTF("clsOffset == invalidEntryOffset\n");
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continue; // invalid offset
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}
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if (class_infos && idx < max_class_infos)
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{
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class_infos[idx].isa = (Class)((uint8_t *)clsopt + clsOffset);
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const char *name = class_getName (class_infos[idx].isa);
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DEBUG_PRINTF ("[%u] isa = %8p %s\n", idx, class_infos[idx].isa, name);
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// Hash the class name so we don't have to read it
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const char *s = name;
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uint32_t h = 5381;
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for (unsigned char c = *s; c; c = *++s)
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h = ((h << 5) + h) + c;
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class_infos[idx].hash = h;
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}
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else
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{
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DEBUG_PRINTF("not(class_infos && idx < max_class_infos)\n");
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}
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++idx;
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}
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const uint32_t *duplicate_count_ptr = (uint32_t *)&classOffsets[clsopt->capacity];
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const uint32_t duplicate_count = *duplicate_count_ptr;
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const objc_classheader_t *duplicateClassOffsets = (const objc_classheader_t *)(&duplicate_count_ptr[1]);
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DEBUG_PRINTF ("duplicate_count = %u\n", duplicate_count);
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DEBUG_PRINTF ("duplicateClassOffsets = %p\n", duplicateClassOffsets);
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for (uint32_t i=0; i<duplicate_count; ++i)
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{
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const int32_t clsOffset = duplicateClassOffsets[i].clsOffset;
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if (clsOffset & 1)
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continue; // duplicate
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else if (clsOffset == invalidEntryOffset)
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continue; // invalid offset
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if (class_infos && idx < max_class_infos)
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{
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class_infos[idx].isa = (Class)((uint8_t *)clsopt + clsOffset);
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const char *name = class_getName (class_infos[idx].isa);
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DEBUG_PRINTF ("[%u] isa = %8p %s\n", idx, class_infos[idx].isa, name);
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// Hash the class name so we don't have to read it
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const char *s = name;
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uint32_t h = 5381;
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for (unsigned char c = *s; c; c = *++s)
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h = ((h << 5) + h) + c;
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class_infos[idx].hash = h;
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}
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++idx;
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}
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}
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DEBUG_PRINTF ("%u class_infos\n", idx);
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DEBUG_PRINTF ("done\n");
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}
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return idx;
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}
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)";
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static uint64_t
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ExtractRuntimeGlobalSymbol(Process *process, ConstString name,
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const ModuleSP &module_sp, Status &error,
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bool read_value = true, uint8_t byte_size = 0,
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uint64_t default_value = LLDB_INVALID_ADDRESS,
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SymbolType sym_type = lldb::eSymbolTypeData) {
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if (!process) {
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error.SetErrorString("no process");
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return default_value;
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}
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if (!module_sp) {
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error.SetErrorString("no module");
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return default_value;
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}
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if (!byte_size)
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byte_size = process->GetAddressByteSize();
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const Symbol *symbol =
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module_sp->FindFirstSymbolWithNameAndType(name, lldb::eSymbolTypeData);
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if (symbol && symbol->ValueIsAddress()) {
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lldb::addr_t symbol_load_addr =
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symbol->GetAddressRef().GetLoadAddress(&process->GetTarget());
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if (symbol_load_addr != LLDB_INVALID_ADDRESS) {
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if (read_value)
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return process->ReadUnsignedIntegerFromMemory(
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symbol_load_addr, byte_size, default_value, error);
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else
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return symbol_load_addr;
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} else {
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error.SetErrorString("symbol address invalid");
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return default_value;
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}
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} else {
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error.SetErrorString("no symbol");
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return default_value;
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}
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}
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AppleObjCRuntimeV2::AppleObjCRuntimeV2(Process *process,
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const ModuleSP &objc_module_sp)
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: AppleObjCRuntime(process), m_get_class_info_code(),
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m_get_class_info_args(LLDB_INVALID_ADDRESS),
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m_get_class_info_args_mutex(), m_get_shared_cache_class_info_code(),
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m_get_shared_cache_class_info_args(LLDB_INVALID_ADDRESS),
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m_get_shared_cache_class_info_args_mutex(), m_decl_vendor_ap(),
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m_isa_hash_table_ptr(LLDB_INVALID_ADDRESS), m_hash_signature(),
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m_has_object_getClass(false), m_loaded_objc_opt(false),
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m_non_pointer_isa_cache_ap(
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NonPointerISACache::CreateInstance(*this, objc_module_sp)),
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m_tagged_pointer_vendor_ap(
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TaggedPointerVendorV2::CreateInstance(*this, objc_module_sp)),
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m_encoding_to_type_sp(), m_noclasses_warning_emitted(false),
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m_CFBoolean_values() {
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static const ConstString g_gdb_object_getClass("gdb_object_getClass");
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m_has_object_getClass = (objc_module_sp->FindFirstSymbolWithNameAndType(
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g_gdb_object_getClass, eSymbolTypeCode) != NULL);
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}
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bool AppleObjCRuntimeV2::GetDynamicTypeAndAddress(
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ValueObject &in_value, lldb::DynamicValueType use_dynamic,
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TypeAndOrName &class_type_or_name, Address &address,
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Value::ValueType &value_type) {
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// We should never get here with a null process...
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assert(m_process != NULL);
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// The Runtime is attached to a particular process, you shouldn't pass in a
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// value from another process.
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// Note, however, the process might be NULL (e.g. if the value was made with
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// SBTarget::EvaluateExpression...)
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// in which case it is sufficient if the target's match:
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Process *process = in_value.GetProcessSP().get();
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if (process)
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assert(process == m_process);
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else
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assert(in_value.GetTargetSP().get() == m_process->CalculateTarget().get());
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class_type_or_name.Clear();
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value_type = Value::ValueType::eValueTypeScalar;
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// Make sure we can have a dynamic value before starting...
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if (CouldHaveDynamicValue(in_value)) {
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// First job, pull out the address at 0 offset from the object That will be
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// the ISA pointer.
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ClassDescriptorSP objc_class_sp(GetNonKVOClassDescriptor(in_value));
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if (objc_class_sp) {
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const addr_t object_ptr = in_value.GetPointerValue();
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address.SetRawAddress(object_ptr);
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ConstString class_name(objc_class_sp->GetClassName());
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class_type_or_name.SetName(class_name);
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TypeSP type_sp(objc_class_sp->GetType());
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if (type_sp)
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class_type_or_name.SetTypeSP(type_sp);
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else {
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type_sp = LookupInCompleteClassCache(class_name);
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if (type_sp) {
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objc_class_sp->SetType(type_sp);
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class_type_or_name.SetTypeSP(type_sp);
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} else {
|
|
// try to go for a CompilerType at least
|
|
DeclVendor *vendor = GetDeclVendor();
|
|
if (vendor) {
|
|
std::vector<clang::NamedDecl *> decls;
|
|
if (vendor->FindDecls(class_name, false, 1, decls) && decls.size())
|
|
class_type_or_name.SetCompilerType(
|
|
ClangASTContext::GetTypeForDecl(decls[0]));
|
|
}
|
|
}
|
|
}
|
|
}
|
|
}
|
|
return class_type_or_name.IsEmpty() == false;
|
|
}
|
|
|
|
//------------------------------------------------------------------
|
|
// Static Functions
|
|
//------------------------------------------------------------------
|
|
LanguageRuntime *AppleObjCRuntimeV2::CreateInstance(Process *process,
|
|
LanguageType language) {
|
|
// FIXME: This should be a MacOS or iOS process, and we need to look for the
|
|
// OBJC section to make
|
|
// sure we aren't using the V1 runtime.
|
|
if (language == eLanguageTypeObjC) {
|
|
ModuleSP objc_module_sp;
|
|
|
|
if (AppleObjCRuntime::GetObjCVersion(process, objc_module_sp) ==
|
|
ObjCRuntimeVersions::eAppleObjC_V2)
|
|
return new AppleObjCRuntimeV2(process, objc_module_sp);
|
|
else
|
|
return NULL;
|
|
} else
|
|
return NULL;
|
|
}
|
|
|
|
static OptionDefinition g_objc_classtable_dump_options[] = {
|
|
{LLDB_OPT_SET_ALL, false, "verbose", 'v', OptionParser::eNoArgument,
|
|
nullptr, nullptr, 0, eArgTypeNone,
|
|
"Print ivar and method information in detail"}};
|
|
|
|
class CommandObjectObjC_ClassTable_Dump : public CommandObjectParsed {
|
|
public:
|
|
class CommandOptions : public Options {
|
|
public:
|
|
CommandOptions() : Options(), m_verbose(false, false) {}
|
|
|
|
~CommandOptions() override = default;
|
|
|
|
Status SetOptionValue(uint32_t option_idx, llvm::StringRef option_arg,
|
|
ExecutionContext *execution_context) override {
|
|
Status error;
|
|
const int short_option = m_getopt_table[option_idx].val;
|
|
switch (short_option) {
|
|
case 'v':
|
|
m_verbose.SetCurrentValue(true);
|
|
m_verbose.SetOptionWasSet();
|
|
break;
|
|
|
|
default:
|
|
error.SetErrorStringWithFormat("unrecognized short option '%c'",
|
|
short_option);
|
|
break;
|
|
}
|
|
|
|
return error;
|
|
}
|
|
|
|
void OptionParsingStarting(ExecutionContext *execution_context) override {
|
|
m_verbose.Clear();
|
|
}
|
|
|
|
llvm::ArrayRef<OptionDefinition> GetDefinitions() override {
|
|
return llvm::makeArrayRef(g_objc_classtable_dump_options);
|
|
}
|
|
|
|
OptionValueBoolean m_verbose;
|
|
};
|
|
|
|
CommandObjectObjC_ClassTable_Dump(CommandInterpreter &interpreter)
|
|
: CommandObjectParsed(
|
|
interpreter, "dump", "Dump information on Objective-C classes "
|
|
"known to the current process.",
|
|
"language objc class-table dump",
|
|
eCommandRequiresProcess | eCommandProcessMustBeLaunched |
|
|
eCommandProcessMustBePaused),
|
|
m_options() {
|
|
CommandArgumentEntry arg;
|
|
CommandArgumentData index_arg;
|
|
|
|
// Define the first (and only) variant of this arg.
|
|
index_arg.arg_type = eArgTypeRegularExpression;
|
|
index_arg.arg_repetition = eArgRepeatOptional;
|
|
|
|
// There is only one variant this argument could be; put it into the
|
|
// argument entry.
|
|
arg.push_back(index_arg);
|
|
|
|
// Push the data for the first argument into the m_arguments vector.
|
|
m_arguments.push_back(arg);
|
|
}
|
|
|
|
~CommandObjectObjC_ClassTable_Dump() override = default;
|
|
|
|
Options *GetOptions() override { return &m_options; }
|
|
|
|
protected:
|
|
bool DoExecute(Args &command, CommandReturnObject &result) override {
|
|
std::unique_ptr<RegularExpression> regex_up;
|
|
switch (command.GetArgumentCount()) {
|
|
case 0:
|
|
break;
|
|
case 1: {
|
|
regex_up.reset(new RegularExpression());
|
|
if (!regex_up->Compile(llvm::StringRef::withNullAsEmpty(
|
|
command.GetArgumentAtIndex(0)))) {
|
|
result.AppendError(
|
|
"invalid argument - please provide a valid regular expression");
|
|
result.SetStatus(lldb::eReturnStatusFailed);
|
|
return false;
|
|
}
|
|
break;
|
|
}
|
|
default: {
|
|
result.AppendError("please provide 0 or 1 arguments");
|
|
result.SetStatus(lldb::eReturnStatusFailed);
|
|
return false;
|
|
}
|
|
}
|
|
|
|
Process *process = m_exe_ctx.GetProcessPtr();
|
|
ObjCLanguageRuntime *objc_runtime = process->GetObjCLanguageRuntime();
|
|
if (objc_runtime) {
|
|
auto iterators_pair = objc_runtime->GetDescriptorIteratorPair();
|
|
auto iterator = iterators_pair.first;
|
|
auto &std_out = result.GetOutputStream();
|
|
for (; iterator != iterators_pair.second; iterator++) {
|
|
if (iterator->second) {
|
|
const char *class_name =
|
|
iterator->second->GetClassName().AsCString("<unknown>");
|
|
if (regex_up && class_name &&
|
|
!regex_up->Execute(llvm::StringRef(class_name)))
|
|
continue;
|
|
std_out.Printf("isa = 0x%" PRIx64, iterator->first);
|
|
std_out.Printf(" name = %s", class_name);
|
|
std_out.Printf(" instance size = %" PRIu64,
|
|
iterator->second->GetInstanceSize());
|
|
std_out.Printf(" num ivars = %" PRIuPTR,
|
|
(uintptr_t)iterator->second->GetNumIVars());
|
|
if (auto superclass = iterator->second->GetSuperclass()) {
|
|
std_out.Printf(" superclass = %s",
|
|
superclass->GetClassName().AsCString("<unknown>"));
|
|
}
|
|
std_out.Printf("\n");
|
|
if (m_options.m_verbose) {
|
|
for (size_t i = 0; i < iterator->second->GetNumIVars(); i++) {
|
|
auto ivar = iterator->second->GetIVarAtIndex(i);
|
|
std_out.Printf(
|
|
" ivar name = %s type = %s size = %" PRIu64
|
|
" offset = %" PRId32 "\n",
|
|
ivar.m_name.AsCString("<unknown>"),
|
|
ivar.m_type.GetDisplayTypeName().AsCString("<unknown>"),
|
|
ivar.m_size, ivar.m_offset);
|
|
}
|
|
iterator->second->Describe(
|
|
nullptr,
|
|
[&std_out](const char *name, const char *type) -> bool {
|
|
std_out.Printf(" instance method name = %s type = %s\n",
|
|
name, type);
|
|
return false;
|
|
},
|
|
[&std_out](const char *name, const char *type) -> bool {
|
|
std_out.Printf(" class method name = %s type = %s\n", name,
|
|
type);
|
|
return false;
|
|
},
|
|
nullptr);
|
|
}
|
|
} else {
|
|
if (regex_up && !regex_up->Execute(llvm::StringRef()))
|
|
continue;
|
|
std_out.Printf("isa = 0x%" PRIx64 " has no associated class.\n",
|
|
iterator->first);
|
|
}
|
|
}
|
|
result.SetStatus(lldb::eReturnStatusSuccessFinishResult);
|
|
return true;
|
|
} else {
|
|
result.AppendError("current process has no Objective-C runtime loaded");
|
|
result.SetStatus(lldb::eReturnStatusFailed);
|
|
return false;
|
|
}
|
|
}
|
|
|
|
CommandOptions m_options;
|
|
};
|
|
|
|
class CommandObjectMultiwordObjC_TaggedPointer_Info
|
|
: public CommandObjectParsed {
|
|
public:
|
|
CommandObjectMultiwordObjC_TaggedPointer_Info(CommandInterpreter &interpreter)
|
|
: CommandObjectParsed(
|
|
interpreter, "info", "Dump information on a tagged pointer.",
|
|
"language objc tagged-pointer info",
|
|
eCommandRequiresProcess | eCommandProcessMustBeLaunched |
|
|
eCommandProcessMustBePaused) {
|
|
CommandArgumentEntry arg;
|
|
CommandArgumentData index_arg;
|
|
|
|
// Define the first (and only) variant of this arg.
|
|
index_arg.arg_type = eArgTypeAddress;
|
|
index_arg.arg_repetition = eArgRepeatPlus;
|
|
|
|
// There is only one variant this argument could be; put it into the
|
|
// argument entry.
|
|
arg.push_back(index_arg);
|
|
|
|
// Push the data for the first argument into the m_arguments vector.
|
|
m_arguments.push_back(arg);
|
|
}
|
|
|
|
~CommandObjectMultiwordObjC_TaggedPointer_Info() override = default;
|
|
|
|
protected:
|
|
bool DoExecute(Args &command, CommandReturnObject &result) override {
|
|
if (command.GetArgumentCount() == 0) {
|
|
result.AppendError("this command requires arguments");
|
|
result.SetStatus(lldb::eReturnStatusFailed);
|
|
return false;
|
|
}
|
|
|
|
Process *process = m_exe_ctx.GetProcessPtr();
|
|
ExecutionContext exe_ctx(process);
|
|
ObjCLanguageRuntime *objc_runtime = process->GetObjCLanguageRuntime();
|
|
if (objc_runtime) {
|
|
ObjCLanguageRuntime::TaggedPointerVendor *tagged_ptr_vendor =
|
|
objc_runtime->GetTaggedPointerVendor();
|
|
if (tagged_ptr_vendor) {
|
|
for (size_t i = 0; i < command.GetArgumentCount(); i++) {
|
|
const char *arg_str = command.GetArgumentAtIndex(i);
|
|
if (!arg_str)
|
|
continue;
|
|
Status error;
|
|
lldb::addr_t arg_addr = Args::StringToAddress(
|
|
&exe_ctx, arg_str, LLDB_INVALID_ADDRESS, &error);
|
|
if (arg_addr == 0 || arg_addr == LLDB_INVALID_ADDRESS || error.Fail())
|
|
continue;
|
|
auto descriptor_sp = tagged_ptr_vendor->GetClassDescriptor(arg_addr);
|
|
if (!descriptor_sp)
|
|
continue;
|
|
uint64_t info_bits = 0;
|
|
uint64_t value_bits = 0;
|
|
uint64_t payload = 0;
|
|
if (descriptor_sp->GetTaggedPointerInfo(&info_bits, &value_bits,
|
|
&payload)) {
|
|
result.GetOutputStream().Printf(
|
|
"0x%" PRIx64 " is tagged.\n\tpayload = 0x%" PRIx64
|
|
"\n\tvalue = 0x%" PRIx64 "\n\tinfo bits = 0x%" PRIx64
|
|
"\n\tclass = %s\n",
|
|
(uint64_t)arg_addr, payload, value_bits, info_bits,
|
|
descriptor_sp->GetClassName().AsCString("<unknown>"));
|
|
} else {
|
|
result.GetOutputStream().Printf("0x%" PRIx64 " is not tagged.\n",
|
|
(uint64_t)arg_addr);
|
|
}
|
|
}
|
|
} else {
|
|
result.AppendError("current process has no tagged pointer support");
|
|
result.SetStatus(lldb::eReturnStatusFailed);
|
|
return false;
|
|
}
|
|
result.SetStatus(lldb::eReturnStatusSuccessFinishResult);
|
|
return true;
|
|
} else {
|
|
result.AppendError("current process has no Objective-C runtime loaded");
|
|
result.SetStatus(lldb::eReturnStatusFailed);
|
|
return false;
|
|
}
|
|
}
|
|
};
|
|
|
|
class CommandObjectMultiwordObjC_ClassTable : public CommandObjectMultiword {
|
|
public:
|
|
CommandObjectMultiwordObjC_ClassTable(CommandInterpreter &interpreter)
|
|
: CommandObjectMultiword(
|
|
interpreter, "class-table",
|
|
"Commands for operating on the Objective-C class table.",
|
|
"class-table <subcommand> [<subcommand-options>]") {
|
|
LoadSubCommand(
|
|
"dump",
|
|
CommandObjectSP(new CommandObjectObjC_ClassTable_Dump(interpreter)));
|
|
}
|
|
|
|
~CommandObjectMultiwordObjC_ClassTable() override = default;
|
|
};
|
|
|
|
class CommandObjectMultiwordObjC_TaggedPointer : public CommandObjectMultiword {
|
|
public:
|
|
CommandObjectMultiwordObjC_TaggedPointer(CommandInterpreter &interpreter)
|
|
: CommandObjectMultiword(
|
|
interpreter, "tagged-pointer",
|
|
"Commands for operating on Objective-C tagged pointers.",
|
|
"class-table <subcommand> [<subcommand-options>]") {
|
|
LoadSubCommand(
|
|
"info",
|
|
CommandObjectSP(
|
|
new CommandObjectMultiwordObjC_TaggedPointer_Info(interpreter)));
|
|
}
|
|
|
|
~CommandObjectMultiwordObjC_TaggedPointer() override = default;
|
|
};
|
|
|
|
class CommandObjectMultiwordObjC : public CommandObjectMultiword {
|
|
public:
|
|
CommandObjectMultiwordObjC(CommandInterpreter &interpreter)
|
|
: CommandObjectMultiword(
|
|
interpreter, "objc",
|
|
"Commands for operating on the Objective-C language runtime.",
|
|
"objc <subcommand> [<subcommand-options>]") {
|
|
LoadSubCommand("class-table",
|
|
CommandObjectSP(
|
|
new CommandObjectMultiwordObjC_ClassTable(interpreter)));
|
|
LoadSubCommand("tagged-pointer",
|
|
CommandObjectSP(new CommandObjectMultiwordObjC_TaggedPointer(
|
|
interpreter)));
|
|
}
|
|
|
|
~CommandObjectMultiwordObjC() override = default;
|
|
};
|
|
|
|
void AppleObjCRuntimeV2::Initialize() {
|
|
PluginManager::RegisterPlugin(
|
|
GetPluginNameStatic(), "Apple Objective C Language Runtime - Version 2",
|
|
CreateInstance,
|
|
[](CommandInterpreter &interpreter) -> lldb::CommandObjectSP {
|
|
return CommandObjectSP(new CommandObjectMultiwordObjC(interpreter));
|
|
});
|
|
}
|
|
|
|
void AppleObjCRuntimeV2::Terminate() {
|
|
PluginManager::UnregisterPlugin(CreateInstance);
|
|
}
|
|
|
|
lldb_private::ConstString AppleObjCRuntimeV2::GetPluginNameStatic() {
|
|
static ConstString g_name("apple-objc-v2");
|
|
return g_name;
|
|
}
|
|
|
|
//------------------------------------------------------------------
|
|
// PluginInterface protocol
|
|
//------------------------------------------------------------------
|
|
lldb_private::ConstString AppleObjCRuntimeV2::GetPluginName() {
|
|
return GetPluginNameStatic();
|
|
}
|
|
|
|
uint32_t AppleObjCRuntimeV2::GetPluginVersion() { return 1; }
|
|
|
|
BreakpointResolverSP
|
|
AppleObjCRuntimeV2::CreateExceptionResolver(Breakpoint *bkpt, bool catch_bp,
|
|
bool throw_bp) {
|
|
BreakpointResolverSP resolver_sp;
|
|
|
|
if (throw_bp)
|
|
resolver_sp.reset(new BreakpointResolverName(
|
|
bkpt, "objc_exception_throw", eFunctionNameTypeBase,
|
|
eLanguageTypeUnknown, Breakpoint::Exact, 0, eLazyBoolNo));
|
|
// FIXME: We don't do catch breakpoints for ObjC yet.
|
|
// Should there be some way for the runtime to specify what it can do in this
|
|
// regard?
|
|
return resolver_sp;
|
|
}
|
|
|
|
UtilityFunction *AppleObjCRuntimeV2::CreateObjectChecker(const char *name) {
|
|
char check_function_code[2048];
|
|
|
|
int len = 0;
|
|
if (m_has_object_getClass) {
|
|
len = ::snprintf(check_function_code, sizeof(check_function_code), R"(
|
|
extern "C" void *gdb_object_getClass(void *);
|
|
extern "C" int printf(const char *format, ...);
|
|
extern "C" void
|
|
%s(void *$__lldb_arg_obj, void *$__lldb_arg_selector) {
|
|
if ($__lldb_arg_obj == (void *)0)
|
|
return; // nil is ok
|
|
if (!gdb_object_getClass($__lldb_arg_obj)) {
|
|
*((volatile int *)0) = 'ocgc';
|
|
} else if ($__lldb_arg_selector != (void *)0) {
|
|
signed char $responds = (signed char)
|
|
[(id)$__lldb_arg_obj respondsToSelector:
|
|
(void *) $__lldb_arg_selector];
|
|
if ($responds == (signed char) 0)
|
|
*((volatile int *)0) = 'ocgc';
|
|
}
|
|
})", name);
|
|
} else {
|
|
len = ::snprintf(check_function_code, sizeof(check_function_code), R"(
|
|
extern "C" void *gdb_class_getClass(void *);
|
|
extern "C" int printf(const char *format, ...);
|
|
extern "C" void
|
|
%s(void *$__lldb_arg_obj, void *$__lldb_arg_selector) {
|
|
if ($__lldb_arg_obj == (void *)0)
|
|
return; // nil is ok
|
|
void **$isa_ptr = (void **)$__lldb_arg_obj;
|
|
if (*$isa_ptr == (void *)0 ||
|
|
!gdb_class_getClass(*$isa_ptr))
|
|
*((volatile int *)0) = 'ocgc';
|
|
else if ($__lldb_arg_selector != (void *)0) {
|
|
signed char $responds = (signed char)
|
|
[(id)$__lldb_arg_obj respondsToSelector:
|
|
(void *) $__lldb_arg_selector];
|
|
if ($responds == (signed char) 0)
|
|
*((volatile int *)0) = 'ocgc';
|
|
}
|
|
})", name);
|
|
}
|
|
|
|
assert(len < (int)sizeof(check_function_code));
|
|
UNUSED_IF_ASSERT_DISABLED(len);
|
|
|
|
Status error;
|
|
return GetTargetRef().GetUtilityFunctionForLanguage(
|
|
check_function_code, eLanguageTypeObjC, name, error);
|
|
}
|
|
|
|
size_t AppleObjCRuntimeV2::GetByteOffsetForIvar(CompilerType &parent_ast_type,
|
|
const char *ivar_name) {
|
|
uint32_t ivar_offset = LLDB_INVALID_IVAR_OFFSET;
|
|
|
|
const char *class_name = parent_ast_type.GetConstTypeName().AsCString();
|
|
if (class_name && class_name[0] && ivar_name && ivar_name[0]) {
|
|
//----------------------------------------------------------------------
|
|
// Make the objective C V2 mangled name for the ivar offset from the
|
|
// class name and ivar name
|
|
//----------------------------------------------------------------------
|
|
std::string buffer("OBJC_IVAR_$_");
|
|
buffer.append(class_name);
|
|
buffer.push_back('.');
|
|
buffer.append(ivar_name);
|
|
ConstString ivar_const_str(buffer.c_str());
|
|
|
|
//----------------------------------------------------------------------
|
|
// Try to get the ivar offset address from the symbol table first using
|
|
// the name we created above
|
|
//----------------------------------------------------------------------
|
|
SymbolContextList sc_list;
|
|
Target &target = m_process->GetTarget();
|
|
target.GetImages().FindSymbolsWithNameAndType(ivar_const_str,
|
|
eSymbolTypeObjCIVar, sc_list);
|
|
|
|
addr_t ivar_offset_address = LLDB_INVALID_ADDRESS;
|
|
|
|
Status error;
|
|
SymbolContext ivar_offset_symbol;
|
|
if (sc_list.GetSize() == 1 &&
|
|
sc_list.GetContextAtIndex(0, ivar_offset_symbol)) {
|
|
if (ivar_offset_symbol.symbol)
|
|
ivar_offset_address =
|
|
ivar_offset_symbol.symbol->GetLoadAddress(&target);
|
|
}
|
|
|
|
//----------------------------------------------------------------------
|
|
// If we didn't get the ivar offset address from the symbol table, fall
|
|
// back to getting it from the runtime
|
|
//----------------------------------------------------------------------
|
|
if (ivar_offset_address == LLDB_INVALID_ADDRESS)
|
|
ivar_offset_address = LookupRuntimeSymbol(ivar_const_str);
|
|
|
|
if (ivar_offset_address != LLDB_INVALID_ADDRESS)
|
|
ivar_offset = m_process->ReadUnsignedIntegerFromMemory(
|
|
ivar_offset_address, 4, LLDB_INVALID_IVAR_OFFSET, error);
|
|
}
|
|
return ivar_offset;
|
|
}
|
|
|
|
// tagged pointers are special not-a-real-pointer values that contain both type
|
|
// and value information
|
|
// this routine attempts to check with as little computational effort as
|
|
// possible whether something
|
|
// could possibly be a tagged pointer - false positives are possible but false
|
|
// negatives shouldn't
|
|
bool AppleObjCRuntimeV2::IsTaggedPointer(addr_t ptr) {
|
|
if (!m_tagged_pointer_vendor_ap)
|
|
return false;
|
|
return m_tagged_pointer_vendor_ap->IsPossibleTaggedPointer(ptr);
|
|
}
|
|
|
|
class RemoteNXMapTable {
|
|
public:
|
|
RemoteNXMapTable()
|
|
: m_count(0), m_num_buckets_minus_one(0),
|
|
m_buckets_ptr(LLDB_INVALID_ADDRESS), m_process(NULL),
|
|
m_end_iterator(*this, -1), m_load_addr(LLDB_INVALID_ADDRESS),
|
|
m_map_pair_size(0), m_invalid_key(0) {}
|
|
|
|
void Dump() {
|
|
printf("RemoteNXMapTable.m_load_addr = 0x%" PRIx64 "\n", m_load_addr);
|
|
printf("RemoteNXMapTable.m_count = %u\n", m_count);
|
|
printf("RemoteNXMapTable.m_num_buckets_minus_one = %u\n",
|
|
m_num_buckets_minus_one);
|
|
printf("RemoteNXMapTable.m_buckets_ptr = 0x%" PRIX64 "\n", m_buckets_ptr);
|
|
}
|
|
|
|
bool ParseHeader(Process *process, lldb::addr_t load_addr) {
|
|
m_process = process;
|
|
m_load_addr = load_addr;
|
|
m_map_pair_size = m_process->GetAddressByteSize() * 2;
|
|
m_invalid_key =
|
|
m_process->GetAddressByteSize() == 8 ? UINT64_MAX : UINT32_MAX;
|
|
Status err;
|
|
|
|
// This currently holds true for all platforms we support, but we might
|
|
// need to change this to use get the actually byte size of "unsigned"
|
|
// from the target AST...
|
|
const uint32_t unsigned_byte_size = sizeof(uint32_t);
|
|
// Skip the prototype as we don't need it (const struct +NXMapTablePrototype
|
|
// *prototype)
|
|
|
|
bool success = true;
|
|
if (load_addr == LLDB_INVALID_ADDRESS)
|
|
success = false;
|
|
else {
|
|
lldb::addr_t cursor = load_addr + m_process->GetAddressByteSize();
|
|
|
|
// unsigned count;
|
|
m_count = m_process->ReadUnsignedIntegerFromMemory(
|
|
cursor, unsigned_byte_size, 0, err);
|
|
if (m_count) {
|
|
cursor += unsigned_byte_size;
|
|
|
|
// unsigned nbBucketsMinusOne;
|
|
m_num_buckets_minus_one = m_process->ReadUnsignedIntegerFromMemory(
|
|
cursor, unsigned_byte_size, 0, err);
|
|
cursor += unsigned_byte_size;
|
|
|
|
// void *buckets;
|
|
m_buckets_ptr = m_process->ReadPointerFromMemory(cursor, err);
|
|
|
|
success = m_count > 0 && m_buckets_ptr != LLDB_INVALID_ADDRESS;
|
|
}
|
|
}
|
|
|
|
if (!success) {
|
|
m_count = 0;
|
|
m_num_buckets_minus_one = 0;
|
|
m_buckets_ptr = LLDB_INVALID_ADDRESS;
|
|
}
|
|
return success;
|
|
}
|
|
|
|
// const_iterator mimics NXMapState and its code comes from NXInitMapState and
|
|
// NXNextMapState.
|
|
typedef std::pair<ConstString, ObjCLanguageRuntime::ObjCISA> element;
|
|
|
|
friend class const_iterator;
|
|
class const_iterator {
|
|
public:
|
|
const_iterator(RemoteNXMapTable &parent, int index)
|
|
: m_parent(parent), m_index(index) {
|
|
AdvanceToValidIndex();
|
|
}
|
|
|
|
const_iterator(const const_iterator &rhs)
|
|
: m_parent(rhs.m_parent), m_index(rhs.m_index) {
|
|
// AdvanceToValidIndex() has been called by rhs already.
|
|
}
|
|
|
|
const_iterator &operator=(const const_iterator &rhs) {
|
|
// AdvanceToValidIndex() has been called by rhs already.
|
|
assert(&m_parent == &rhs.m_parent);
|
|
m_index = rhs.m_index;
|
|
return *this;
|
|
}
|
|
|
|
bool operator==(const const_iterator &rhs) const {
|
|
if (&m_parent != &rhs.m_parent)
|
|
return false;
|
|
if (m_index != rhs.m_index)
|
|
return false;
|
|
|
|
return true;
|
|
}
|
|
|
|
bool operator!=(const const_iterator &rhs) const {
|
|
return !(operator==(rhs));
|
|
}
|
|
|
|
const_iterator &operator++() {
|
|
AdvanceToValidIndex();
|
|
return *this;
|
|
}
|
|
|
|
const element operator*() const {
|
|
if (m_index == -1) {
|
|
// TODO find a way to make this an error, but not an assert
|
|
return element();
|
|
}
|
|
|
|
lldb::addr_t pairs_ptr = m_parent.m_buckets_ptr;
|
|
size_t map_pair_size = m_parent.m_map_pair_size;
|
|
lldb::addr_t pair_ptr = pairs_ptr + (m_index * map_pair_size);
|
|
|
|
Status err;
|
|
|
|
lldb::addr_t key =
|
|
m_parent.m_process->ReadPointerFromMemory(pair_ptr, err);
|
|
if (!err.Success())
|
|
return element();
|
|
lldb::addr_t value = m_parent.m_process->ReadPointerFromMemory(
|
|
pair_ptr + m_parent.m_process->GetAddressByteSize(), err);
|
|
if (!err.Success())
|
|
return element();
|
|
|
|
std::string key_string;
|
|
|
|
m_parent.m_process->ReadCStringFromMemory(key, key_string, err);
|
|
if (!err.Success())
|
|
return element();
|
|
|
|
return element(ConstString(key_string.c_str()),
|
|
(ObjCLanguageRuntime::ObjCISA)value);
|
|
}
|
|
|
|
private:
|
|
void AdvanceToValidIndex() {
|
|
if (m_index == -1)
|
|
return;
|
|
|
|
const lldb::addr_t pairs_ptr = m_parent.m_buckets_ptr;
|
|
const size_t map_pair_size = m_parent.m_map_pair_size;
|
|
const lldb::addr_t invalid_key = m_parent.m_invalid_key;
|
|
Status err;
|
|
|
|
while (m_index--) {
|
|
lldb::addr_t pair_ptr = pairs_ptr + (m_index * map_pair_size);
|
|
lldb::addr_t key =
|
|
m_parent.m_process->ReadPointerFromMemory(pair_ptr, err);
|
|
|
|
if (!err.Success()) {
|
|
m_index = -1;
|
|
return;
|
|
}
|
|
|
|
if (key != invalid_key)
|
|
return;
|
|
}
|
|
}
|
|
RemoteNXMapTable &m_parent;
|
|
int m_index;
|
|
};
|
|
|
|
const_iterator begin() {
|
|
return const_iterator(*this, m_num_buckets_minus_one + 1);
|
|
}
|
|
|
|
const_iterator end() { return m_end_iterator; }
|
|
|
|
uint32_t GetCount() const { return m_count; }
|
|
|
|
uint32_t GetBucketCount() const { return m_num_buckets_minus_one; }
|
|
|
|
lldb::addr_t GetBucketDataPointer() const { return m_buckets_ptr; }
|
|
|
|
lldb::addr_t GetTableLoadAddress() const { return m_load_addr; }
|
|
|
|
private:
|
|
// contents of _NXMapTable struct
|
|
uint32_t m_count;
|
|
uint32_t m_num_buckets_minus_one;
|
|
lldb::addr_t m_buckets_ptr;
|
|
lldb_private::Process *m_process;
|
|
const_iterator m_end_iterator;
|
|
lldb::addr_t m_load_addr;
|
|
size_t m_map_pair_size;
|
|
lldb::addr_t m_invalid_key;
|
|
};
|
|
|
|
AppleObjCRuntimeV2::HashTableSignature::HashTableSignature()
|
|
: m_count(0), m_num_buckets(0), m_buckets_ptr(0) {}
|
|
|
|
void AppleObjCRuntimeV2::HashTableSignature::UpdateSignature(
|
|
const RemoteNXMapTable &hash_table) {
|
|
m_count = hash_table.GetCount();
|
|
m_num_buckets = hash_table.GetBucketCount();
|
|
m_buckets_ptr = hash_table.GetBucketDataPointer();
|
|
}
|
|
|
|
bool AppleObjCRuntimeV2::HashTableSignature::NeedsUpdate(
|
|
Process *process, AppleObjCRuntimeV2 *runtime,
|
|
RemoteNXMapTable &hash_table) {
|
|
if (!hash_table.ParseHeader(process, runtime->GetISAHashTablePointer())) {
|
|
return false; // Failed to parse the header, no need to update anything
|
|
}
|
|
|
|
// Check with out current signature and return true if the count,
|
|
// number of buckets or the hash table address changes.
|
|
if (m_count == hash_table.GetCount() &&
|
|
m_num_buckets == hash_table.GetBucketCount() &&
|
|
m_buckets_ptr == hash_table.GetBucketDataPointer()) {
|
|
// Hash table hasn't changed
|
|
return false;
|
|
}
|
|
// Hash table data has changed, we need to update
|
|
return true;
|
|
}
|
|
|
|
ObjCLanguageRuntime::ClassDescriptorSP
|
|
AppleObjCRuntimeV2::GetClassDescriptorFromISA(ObjCISA isa) {
|
|
ObjCLanguageRuntime::ClassDescriptorSP class_descriptor_sp;
|
|
if (m_non_pointer_isa_cache_ap.get())
|
|
class_descriptor_sp = m_non_pointer_isa_cache_ap->GetClassDescriptor(isa);
|
|
if (!class_descriptor_sp)
|
|
class_descriptor_sp = ObjCLanguageRuntime::GetClassDescriptorFromISA(isa);
|
|
return class_descriptor_sp;
|
|
}
|
|
|
|
ObjCLanguageRuntime::ClassDescriptorSP
|
|
AppleObjCRuntimeV2::GetClassDescriptor(ValueObject &valobj) {
|
|
ClassDescriptorSP objc_class_sp;
|
|
if (valobj.IsBaseClass()) {
|
|
ValueObject *parent = valobj.GetParent();
|
|
// if I am my own parent, bail out of here fast..
|
|
if (parent && parent != &valobj) {
|
|
ClassDescriptorSP parent_descriptor_sp = GetClassDescriptor(*parent);
|
|
if (parent_descriptor_sp)
|
|
return parent_descriptor_sp->GetSuperclass();
|
|
}
|
|
return nullptr;
|
|
}
|
|
// if we get an invalid VO (which might still happen when playing around
|
|
// with pointers returned by the expression parser, don't consider this
|
|
// a valid ObjC object)
|
|
if (valobj.GetCompilerType().IsValid()) {
|
|
addr_t isa_pointer = valobj.GetPointerValue();
|
|
|
|
// tagged pointer
|
|
if (IsTaggedPointer(isa_pointer)) {
|
|
return m_tagged_pointer_vendor_ap->GetClassDescriptor(isa_pointer);
|
|
} else {
|
|
ExecutionContext exe_ctx(valobj.GetExecutionContextRef());
|
|
|
|
Process *process = exe_ctx.GetProcessPtr();
|
|
if (process) {
|
|
Status error;
|
|
ObjCISA isa = process->ReadPointerFromMemory(isa_pointer, error);
|
|
if (isa != LLDB_INVALID_ADDRESS) {
|
|
objc_class_sp = GetClassDescriptorFromISA(isa);
|
|
if (isa && !objc_class_sp) {
|
|
Log *log(GetLogIfAllCategoriesSet(LIBLLDB_LOG_PROCESS));
|
|
if (log)
|
|
log->Printf("0x%" PRIx64
|
|
": AppleObjCRuntimeV2::GetClassDescriptor() ISA was "
|
|
"not in class descriptor cache 0x%" PRIx64,
|
|
isa_pointer, isa);
|
|
}
|
|
}
|
|
}
|
|
}
|
|
}
|
|
return objc_class_sp;
|
|
}
|
|
|
|
lldb::addr_t AppleObjCRuntimeV2::GetISAHashTablePointer() {
|
|
if (m_isa_hash_table_ptr == LLDB_INVALID_ADDRESS) {
|
|
Process *process = GetProcess();
|
|
|
|
ModuleSP objc_module_sp(GetObjCModule());
|
|
|
|
if (!objc_module_sp)
|
|
return LLDB_INVALID_ADDRESS;
|
|
|
|
static ConstString g_gdb_objc_realized_classes("gdb_objc_realized_classes");
|
|
|
|
const Symbol *symbol = objc_module_sp->FindFirstSymbolWithNameAndType(
|
|
g_gdb_objc_realized_classes, lldb::eSymbolTypeAny);
|
|
if (symbol) {
|
|
lldb::addr_t gdb_objc_realized_classes_ptr =
|
|
symbol->GetLoadAddress(&process->GetTarget());
|
|
|
|
if (gdb_objc_realized_classes_ptr != LLDB_INVALID_ADDRESS) {
|
|
Status error;
|
|
m_isa_hash_table_ptr = process->ReadPointerFromMemory(
|
|
gdb_objc_realized_classes_ptr, error);
|
|
}
|
|
}
|
|
}
|
|
return m_isa_hash_table_ptr;
|
|
}
|
|
|
|
AppleObjCRuntimeV2::DescriptorMapUpdateResult
|
|
AppleObjCRuntimeV2::UpdateISAToDescriptorMapDynamic(
|
|
RemoteNXMapTable &hash_table) {
|
|
Process *process = GetProcess();
|
|
|
|
if (process == NULL)
|
|
return DescriptorMapUpdateResult::Fail();
|
|
|
|
uint32_t num_class_infos = 0;
|
|
|
|
Log *log(GetLogIfAnyCategoriesSet(LIBLLDB_LOG_PROCESS | LIBLLDB_LOG_TYPES));
|
|
|
|
ExecutionContext exe_ctx;
|
|
|
|
ThreadSP thread_sp = process->GetThreadList().GetExpressionExecutionThread();
|
|
|
|
if (!thread_sp)
|
|
return DescriptorMapUpdateResult::Fail();
|
|
|
|
thread_sp->CalculateExecutionContext(exe_ctx);
|
|
ClangASTContext *ast = process->GetTarget().GetScratchClangASTContext();
|
|
|
|
if (!ast)
|
|
return DescriptorMapUpdateResult::Fail();
|
|
|
|
Address function_address;
|
|
|
|
DiagnosticManager diagnostics;
|
|
|
|
const uint32_t addr_size = process->GetAddressByteSize();
|
|
|
|
Status err;
|
|
|
|
// Read the total number of classes from the hash table
|
|
const uint32_t num_classes = hash_table.GetCount();
|
|
if (num_classes == 0) {
|
|
if (log)
|
|
log->Printf("No dynamic classes found in gdb_objc_realized_classes.");
|
|
return DescriptorMapUpdateResult::Success(0);
|
|
}
|
|
|
|
// Make some types for our arguments
|
|
CompilerType clang_uint32_t_type =
|
|
ast->GetBuiltinTypeForEncodingAndBitSize(eEncodingUint, 32);
|
|
CompilerType clang_void_pointer_type =
|
|
ast->GetBasicType(eBasicTypeVoid).GetPointerType();
|
|
|
|
ValueList arguments;
|
|
FunctionCaller *get_class_info_function = nullptr;
|
|
|
|
if (!m_get_class_info_code.get()) {
|
|
Status error;
|
|
m_get_class_info_code.reset(GetTargetRef().GetUtilityFunctionForLanguage(
|
|
g_get_dynamic_class_info_body, eLanguageTypeObjC,
|
|
g_get_dynamic_class_info_name, error));
|
|
if (error.Fail()) {
|
|
if (log)
|
|
log->Printf(
|
|
"Failed to get Utility Function for implementation lookup: %s",
|
|
error.AsCString());
|
|
m_get_class_info_code.reset();
|
|
} else {
|
|
diagnostics.Clear();
|
|
|
|
if (!m_get_class_info_code->Install(diagnostics, exe_ctx)) {
|
|
if (log) {
|
|
log->Printf("Failed to install implementation lookup");
|
|
diagnostics.Dump(log);
|
|
}
|
|
m_get_class_info_code.reset();
|
|
}
|
|
}
|
|
if (!m_get_class_info_code.get())
|
|
return DescriptorMapUpdateResult::Fail();
|
|
|
|
// Next make the runner function for our implementation utility function.
|
|
Value value;
|
|
value.SetValueType(Value::eValueTypeScalar);
|
|
value.SetCompilerType(clang_void_pointer_type);
|
|
arguments.PushValue(value);
|
|
arguments.PushValue(value);
|
|
|
|
value.SetValueType(Value::eValueTypeScalar);
|
|
value.SetCompilerType(clang_uint32_t_type);
|
|
arguments.PushValue(value);
|
|
arguments.PushValue(value);
|
|
|
|
get_class_info_function = m_get_class_info_code->MakeFunctionCaller(
|
|
clang_uint32_t_type, arguments, thread_sp, error);
|
|
|
|
if (error.Fail()) {
|
|
if (log)
|
|
log->Printf(
|
|
"Failed to make function caller for implementation lookup: %s.",
|
|
error.AsCString());
|
|
return DescriptorMapUpdateResult::Fail();
|
|
}
|
|
} else {
|
|
get_class_info_function = m_get_class_info_code->GetFunctionCaller();
|
|
if (!get_class_info_function) {
|
|
if (log) {
|
|
log->Printf("Failed to get implementation lookup function caller.");
|
|
diagnostics.Dump(log);
|
|
}
|
|
|
|
return DescriptorMapUpdateResult::Fail();
|
|
}
|
|
arguments = get_class_info_function->GetArgumentValues();
|
|
}
|
|
|
|
diagnostics.Clear();
|
|
|
|
const uint32_t class_info_byte_size = addr_size + 4;
|
|
const uint32_t class_infos_byte_size = num_classes * class_info_byte_size;
|
|
lldb::addr_t class_infos_addr = process->AllocateMemory(
|
|
class_infos_byte_size, ePermissionsReadable | ePermissionsWritable, err);
|
|
|
|
if (class_infos_addr == LLDB_INVALID_ADDRESS) {
|
|
if (log)
|
|
log->Printf("unable to allocate %" PRIu32
|
|
" bytes in process for shared cache read",
|
|
class_infos_byte_size);
|
|
return DescriptorMapUpdateResult::Fail();
|
|
}
|
|
|
|
std::lock_guard<std::mutex> guard(m_get_class_info_args_mutex);
|
|
|
|
// Fill in our function argument values
|
|
arguments.GetValueAtIndex(0)->GetScalar() = hash_table.GetTableLoadAddress();
|
|
arguments.GetValueAtIndex(1)->GetScalar() = class_infos_addr;
|
|
arguments.GetValueAtIndex(2)->GetScalar() = class_infos_byte_size;
|
|
|
|
// Only dump the runtime classes from the expression evaluation if the
|
|
// log is verbose:
|
|
Log *type_log = GetLogIfAllCategoriesSet(LIBLLDB_LOG_TYPES);
|
|
bool dump_log = type_log && type_log->GetVerbose();
|
|
|
|
arguments.GetValueAtIndex(3)->GetScalar() = dump_log ? 1 : 0;
|
|
|
|
bool success = false;
|
|
|
|
diagnostics.Clear();
|
|
|
|
// Write our function arguments into the process so we can run our function
|
|
if (get_class_info_function->WriteFunctionArguments(
|
|
exe_ctx, m_get_class_info_args, arguments, diagnostics)) {
|
|
EvaluateExpressionOptions options;
|
|
options.SetUnwindOnError(true);
|
|
options.SetTryAllThreads(false);
|
|
options.SetStopOthers(true);
|
|
options.SetIgnoreBreakpoints(true);
|
|
options.SetTimeout(g_utility_function_timeout);
|
|
|
|
Value return_value;
|
|
return_value.SetValueType(Value::eValueTypeScalar);
|
|
// return_value.SetContext (Value::eContextTypeClangType,
|
|
// clang_uint32_t_type);
|
|
return_value.SetCompilerType(clang_uint32_t_type);
|
|
return_value.GetScalar() = 0;
|
|
|
|
diagnostics.Clear();
|
|
|
|
// Run the function
|
|
ExpressionResults results = get_class_info_function->ExecuteFunction(
|
|
exe_ctx, &m_get_class_info_args, options, diagnostics, return_value);
|
|
|
|
if (results == eExpressionCompleted) {
|
|
// The result is the number of ClassInfo structures that were filled in
|
|
num_class_infos = return_value.GetScalar().ULong();
|
|
if (log)
|
|
log->Printf("Discovered %u ObjC classes\n", num_class_infos);
|
|
if (num_class_infos > 0) {
|
|
// Read the ClassInfo structures
|
|
DataBufferHeap buffer(num_class_infos * class_info_byte_size, 0);
|
|
if (process->ReadMemory(class_infos_addr, buffer.GetBytes(),
|
|
buffer.GetByteSize(),
|
|
err) == buffer.GetByteSize()) {
|
|
DataExtractor class_infos_data(buffer.GetBytes(),
|
|
buffer.GetByteSize(),
|
|
process->GetByteOrder(), addr_size);
|
|
ParseClassInfoArray(class_infos_data, num_class_infos);
|
|
}
|
|
}
|
|
success = true;
|
|
} else {
|
|
if (log) {
|
|
log->Printf("Error evaluating our find class name function.");
|
|
diagnostics.Dump(log);
|
|
}
|
|
}
|
|
} else {
|
|
if (log) {
|
|
log->Printf("Error writing function arguments.");
|
|
diagnostics.Dump(log);
|
|
}
|
|
}
|
|
|
|
// Deallocate the memory we allocated for the ClassInfo array
|
|
process->DeallocateMemory(class_infos_addr);
|
|
|
|
return DescriptorMapUpdateResult(success, num_class_infos);
|
|
}
|
|
|
|
uint32_t AppleObjCRuntimeV2::ParseClassInfoArray(const DataExtractor &data,
|
|
uint32_t num_class_infos) {
|
|
// Parses an array of "num_class_infos" packed ClassInfo structures:
|
|
//
|
|
// struct ClassInfo
|
|
// {
|
|
// Class isa;
|
|
// uint32_t hash;
|
|
// } __attribute__((__packed__));
|
|
|
|
Log *log(GetLogIfAnyCategoriesSet(LIBLLDB_LOG_PROCESS | LIBLLDB_LOG_TYPES));
|
|
|
|
uint32_t num_parsed = 0;
|
|
|
|
// Iterate through all ClassInfo structures
|
|
lldb::offset_t offset = 0;
|
|
for (uint32_t i = 0; i < num_class_infos; ++i) {
|
|
ObjCISA isa = data.GetPointer(&offset);
|
|
|
|
if (isa == 0) {
|
|
if (log)
|
|
log->Printf(
|
|
"AppleObjCRuntimeV2 found NULL isa, ignoring this class info");
|
|
continue;
|
|
}
|
|
// Check if we already know about this ISA, if we do, the info will
|
|
// never change, so we can just skip it.
|
|
if (ISAIsCached(isa)) {
|
|
if (log)
|
|
log->Printf("AppleObjCRuntimeV2 found cached isa=0x%" PRIx64
|
|
", ignoring this class info",
|
|
isa);
|
|
offset += 4;
|
|
} else {
|
|
// Read the 32 bit hash for the class name
|
|
const uint32_t name_hash = data.GetU32(&offset);
|
|
ClassDescriptorSP descriptor_sp(new ClassDescriptorV2(*this, isa, NULL));
|
|
AddClass(isa, descriptor_sp, name_hash);
|
|
num_parsed++;
|
|
if (log)
|
|
log->Printf("AppleObjCRuntimeV2 added isa=0x%" PRIx64
|
|
", hash=0x%8.8x, name=%s",
|
|
isa, name_hash,
|
|
descriptor_sp->GetClassName().AsCString("<unknown>"));
|
|
}
|
|
}
|
|
if (log)
|
|
log->Printf("AppleObjCRuntimeV2 parsed %" PRIu32 " class infos",
|
|
num_parsed);
|
|
return num_parsed;
|
|
}
|
|
|
|
AppleObjCRuntimeV2::DescriptorMapUpdateResult
|
|
AppleObjCRuntimeV2::UpdateISAToDescriptorMapSharedCache() {
|
|
Process *process = GetProcess();
|
|
|
|
if (process == NULL)
|
|
return DescriptorMapUpdateResult::Fail();
|
|
|
|
Log *log(GetLogIfAnyCategoriesSet(LIBLLDB_LOG_PROCESS | LIBLLDB_LOG_TYPES));
|
|
|
|
ExecutionContext exe_ctx;
|
|
|
|
ThreadSP thread_sp = process->GetThreadList().GetExpressionExecutionThread();
|
|
|
|
if (!thread_sp)
|
|
return DescriptorMapUpdateResult::Fail();
|
|
|
|
thread_sp->CalculateExecutionContext(exe_ctx);
|
|
ClangASTContext *ast = process->GetTarget().GetScratchClangASTContext();
|
|
|
|
if (!ast)
|
|
return DescriptorMapUpdateResult::Fail();
|
|
|
|
Address function_address;
|
|
|
|
DiagnosticManager diagnostics;
|
|
|
|
const uint32_t addr_size = process->GetAddressByteSize();
|
|
|
|
Status err;
|
|
|
|
uint32_t num_class_infos = 0;
|
|
|
|
const lldb::addr_t objc_opt_ptr = GetSharedCacheReadOnlyAddress();
|
|
|
|
if (objc_opt_ptr == LLDB_INVALID_ADDRESS)
|
|
return DescriptorMapUpdateResult::Fail();
|
|
|
|
const uint32_t num_classes = 128 * 1024;
|
|
|
|
// Make some types for our arguments
|
|
CompilerType clang_uint32_t_type =
|
|
ast->GetBuiltinTypeForEncodingAndBitSize(eEncodingUint, 32);
|
|
CompilerType clang_void_pointer_type =
|
|
ast->GetBasicType(eBasicTypeVoid).GetPointerType();
|
|
|
|
ValueList arguments;
|
|
FunctionCaller *get_shared_cache_class_info_function = nullptr;
|
|
|
|
if (!m_get_shared_cache_class_info_code.get()) {
|
|
Status error;
|
|
m_get_shared_cache_class_info_code.reset(
|
|
GetTargetRef().GetUtilityFunctionForLanguage(
|
|
g_get_shared_cache_class_info_body, eLanguageTypeObjC,
|
|
g_get_shared_cache_class_info_name, error));
|
|
if (error.Fail()) {
|
|
if (log)
|
|
log->Printf(
|
|
"Failed to get Utility function for implementation lookup: %s.",
|
|
error.AsCString());
|
|
m_get_shared_cache_class_info_code.reset();
|
|
} else {
|
|
diagnostics.Clear();
|
|
|
|
if (!m_get_shared_cache_class_info_code->Install(diagnostics, exe_ctx)) {
|
|
if (log) {
|
|
log->Printf("Failed to install implementation lookup.");
|
|
diagnostics.Dump(log);
|
|
}
|
|
m_get_shared_cache_class_info_code.reset();
|
|
}
|
|
}
|
|
|
|
if (!m_get_shared_cache_class_info_code.get())
|
|
return DescriptorMapUpdateResult::Fail();
|
|
|
|
// Next make the function caller for our implementation utility function.
|
|
Value value;
|
|
value.SetValueType(Value::eValueTypeScalar);
|
|
// value.SetContext (Value::eContextTypeClangType, clang_void_pointer_type);
|
|
value.SetCompilerType(clang_void_pointer_type);
|
|
arguments.PushValue(value);
|
|
arguments.PushValue(value);
|
|
|
|
value.SetValueType(Value::eValueTypeScalar);
|
|
// value.SetContext (Value::eContextTypeClangType, clang_uint32_t_type);
|
|
value.SetCompilerType(clang_uint32_t_type);
|
|
arguments.PushValue(value);
|
|
arguments.PushValue(value);
|
|
|
|
get_shared_cache_class_info_function =
|
|
m_get_shared_cache_class_info_code->MakeFunctionCaller(
|
|
clang_uint32_t_type, arguments, thread_sp, error);
|
|
|
|
if (get_shared_cache_class_info_function == nullptr)
|
|
return DescriptorMapUpdateResult::Fail();
|
|
|
|
} else {
|
|
get_shared_cache_class_info_function =
|
|
m_get_shared_cache_class_info_code->GetFunctionCaller();
|
|
if (get_shared_cache_class_info_function == nullptr)
|
|
return DescriptorMapUpdateResult::Fail();
|
|
arguments = get_shared_cache_class_info_function->GetArgumentValues();
|
|
}
|
|
|
|
diagnostics.Clear();
|
|
|
|
const uint32_t class_info_byte_size = addr_size + 4;
|
|
const uint32_t class_infos_byte_size = num_classes * class_info_byte_size;
|
|
lldb::addr_t class_infos_addr = process->AllocateMemory(
|
|
class_infos_byte_size, ePermissionsReadable | ePermissionsWritable, err);
|
|
|
|
if (class_infos_addr == LLDB_INVALID_ADDRESS) {
|
|
if (log)
|
|
log->Printf("unable to allocate %" PRIu32
|
|
" bytes in process for shared cache read",
|
|
class_infos_byte_size);
|
|
return DescriptorMapUpdateResult::Fail();
|
|
}
|
|
|
|
std::lock_guard<std::mutex> guard(m_get_shared_cache_class_info_args_mutex);
|
|
|
|
// Fill in our function argument values
|
|
arguments.GetValueAtIndex(0)->GetScalar() = objc_opt_ptr;
|
|
arguments.GetValueAtIndex(1)->GetScalar() = class_infos_addr;
|
|
arguments.GetValueAtIndex(2)->GetScalar() = class_infos_byte_size;
|
|
// Only dump the runtime classes from the expression evaluation if the
|
|
// log is verbose:
|
|
Log *type_log = GetLogIfAllCategoriesSet(LIBLLDB_LOG_TYPES);
|
|
bool dump_log = type_log && type_log->GetVerbose();
|
|
|
|
arguments.GetValueAtIndex(3)->GetScalar() = dump_log ? 1 : 0;
|
|
|
|
bool success = false;
|
|
|
|
diagnostics.Clear();
|
|
|
|
// Write our function arguments into the process so we can run our function
|
|
if (get_shared_cache_class_info_function->WriteFunctionArguments(
|
|
exe_ctx, m_get_shared_cache_class_info_args, arguments,
|
|
diagnostics)) {
|
|
EvaluateExpressionOptions options;
|
|
options.SetUnwindOnError(true);
|
|
options.SetTryAllThreads(false);
|
|
options.SetStopOthers(true);
|
|
options.SetIgnoreBreakpoints(true);
|
|
options.SetTimeout(g_utility_function_timeout);
|
|
|
|
Value return_value;
|
|
return_value.SetValueType(Value::eValueTypeScalar);
|
|
// return_value.SetContext (Value::eContextTypeClangType,
|
|
// clang_uint32_t_type);
|
|
return_value.SetCompilerType(clang_uint32_t_type);
|
|
return_value.GetScalar() = 0;
|
|
|
|
diagnostics.Clear();
|
|
|
|
// Run the function
|
|
ExpressionResults results =
|
|
get_shared_cache_class_info_function->ExecuteFunction(
|
|
exe_ctx, &m_get_shared_cache_class_info_args, options, diagnostics,
|
|
return_value);
|
|
|
|
if (results == eExpressionCompleted) {
|
|
// The result is the number of ClassInfo structures that were filled in
|
|
num_class_infos = return_value.GetScalar().ULong();
|
|
if (log)
|
|
log->Printf("Discovered %u ObjC classes in shared cache\n",
|
|
num_class_infos);
|
|
#ifdef LLDB_CONFIGURATION_DEBUG
|
|
assert(num_class_infos <= num_classes);
|
|
#endif
|
|
if (num_class_infos > 0) {
|
|
if (num_class_infos > num_classes) {
|
|
num_class_infos = num_classes;
|
|
|
|
success = false;
|
|
} else {
|
|
success = true;
|
|
}
|
|
|
|
// Read the ClassInfo structures
|
|
DataBufferHeap buffer(num_class_infos * class_info_byte_size, 0);
|
|
if (process->ReadMemory(class_infos_addr, buffer.GetBytes(),
|
|
buffer.GetByteSize(),
|
|
err) == buffer.GetByteSize()) {
|
|
DataExtractor class_infos_data(buffer.GetBytes(),
|
|
buffer.GetByteSize(),
|
|
process->GetByteOrder(), addr_size);
|
|
|
|
ParseClassInfoArray(class_infos_data, num_class_infos);
|
|
}
|
|
} else {
|
|
success = true;
|
|
}
|
|
} else {
|
|
if (log) {
|
|
log->Printf("Error evaluating our find class name function.");
|
|
diagnostics.Dump(log);
|
|
}
|
|
}
|
|
} else {
|
|
if (log) {
|
|
log->Printf("Error writing function arguments.");
|
|
diagnostics.Dump(log);
|
|
}
|
|
}
|
|
|
|
// Deallocate the memory we allocated for the ClassInfo array
|
|
process->DeallocateMemory(class_infos_addr);
|
|
|
|
return DescriptorMapUpdateResult(success, num_class_infos);
|
|
}
|
|
|
|
bool AppleObjCRuntimeV2::UpdateISAToDescriptorMapFromMemory(
|
|
RemoteNXMapTable &hash_table) {
|
|
Log *log(GetLogIfAnyCategoriesSet(LIBLLDB_LOG_PROCESS | LIBLLDB_LOG_TYPES));
|
|
|
|
Process *process = GetProcess();
|
|
|
|
if (process == NULL)
|
|
return false;
|
|
|
|
uint32_t num_map_table_isas = 0;
|
|
|
|
ModuleSP objc_module_sp(GetObjCModule());
|
|
|
|
if (objc_module_sp) {
|
|
for (RemoteNXMapTable::element elt : hash_table) {
|
|
++num_map_table_isas;
|
|
|
|
if (ISAIsCached(elt.second))
|
|
continue;
|
|
|
|
ClassDescriptorSP descriptor_sp = ClassDescriptorSP(
|
|
new ClassDescriptorV2(*this, elt.second, elt.first.AsCString()));
|
|
|
|
if (log && log->GetVerbose())
|
|
log->Printf("AppleObjCRuntimeV2 added (ObjCISA)0x%" PRIx64
|
|
" (%s) from dynamic table to isa->descriptor cache",
|
|
elt.second, elt.first.AsCString());
|
|
|
|
AddClass(elt.second, descriptor_sp, elt.first.AsCString());
|
|
}
|
|
}
|
|
|
|
return num_map_table_isas > 0;
|
|
}
|
|
|
|
lldb::addr_t AppleObjCRuntimeV2::GetSharedCacheReadOnlyAddress() {
|
|
Process *process = GetProcess();
|
|
|
|
if (process) {
|
|
ModuleSP objc_module_sp(GetObjCModule());
|
|
|
|
if (objc_module_sp) {
|
|
ObjectFile *objc_object = objc_module_sp->GetObjectFile();
|
|
|
|
if (objc_object) {
|
|
SectionList *section_list = objc_module_sp->GetSectionList();
|
|
|
|
if (section_list) {
|
|
SectionSP text_segment_sp(
|
|
section_list->FindSectionByName(ConstString("__TEXT")));
|
|
|
|
if (text_segment_sp) {
|
|
SectionSP objc_opt_section_sp(
|
|
text_segment_sp->GetChildren().FindSectionByName(
|
|
ConstString("__objc_opt_ro")));
|
|
|
|
if (objc_opt_section_sp) {
|
|
return objc_opt_section_sp->GetLoadBaseAddress(
|
|
&process->GetTarget());
|
|
}
|
|
}
|
|
}
|
|
}
|
|
}
|
|
}
|
|
return LLDB_INVALID_ADDRESS;
|
|
}
|
|
|
|
void AppleObjCRuntimeV2::UpdateISAToDescriptorMapIfNeeded() {
|
|
Log *log(GetLogIfAnyCategoriesSet(LIBLLDB_LOG_PROCESS | LIBLLDB_LOG_TYPES));
|
|
|
|
static Timer::Category func_cat(LLVM_PRETTY_FUNCTION);
|
|
Timer scoped_timer(func_cat, LLVM_PRETTY_FUNCTION);
|
|
|
|
// Else we need to check with our process to see when the map was updated.
|
|
Process *process = GetProcess();
|
|
|
|
if (process) {
|
|
RemoteNXMapTable hash_table;
|
|
|
|
// Update the process stop ID that indicates the last time we updated the
|
|
// map, whether it was successful or not.
|
|
m_isa_to_descriptor_stop_id = process->GetStopID();
|
|
|
|
if (!m_hash_signature.NeedsUpdate(process, this, hash_table))
|
|
return;
|
|
|
|
m_hash_signature.UpdateSignature(hash_table);
|
|
|
|
// Grab the dynamically loaded objc classes from the hash table in memory
|
|
DescriptorMapUpdateResult dynamic_update_result =
|
|
UpdateISAToDescriptorMapDynamic(hash_table);
|
|
|
|
// Now get the objc classes that are baked into the Objective C runtime
|
|
// in the shared cache, but only once per process as this data never
|
|
// changes
|
|
if (!m_loaded_objc_opt) {
|
|
// it is legitimately possible for the shared cache to be empty - in that
|
|
// case, the dynamic hash table
|
|
// will contain all the class information we need; the situation we're
|
|
// trying to detect is one where
|
|
// we aren't seeing class information from the runtime - in order to
|
|
// detect that vs. just the shared cache
|
|
// being empty or sparsely populated, we set an arbitrary (very low)
|
|
// threshold for the number of classes
|
|
// that we want to see in a "good" scenario - anything below that is
|
|
// suspicious (Foundation alone has thousands
|
|
// of classes)
|
|
const uint32_t num_classes_to_warn_at = 500;
|
|
|
|
DescriptorMapUpdateResult shared_cache_update_result =
|
|
UpdateISAToDescriptorMapSharedCache();
|
|
|
|
if (log)
|
|
log->Printf("attempted to read objc class data - results: "
|
|
"[dynamic_update]: ran: %s, count: %" PRIu32
|
|
" [shared_cache_update]: ran: %s, count: %" PRIu32,
|
|
dynamic_update_result.m_update_ran ? "yes" : "no",
|
|
dynamic_update_result.m_num_found,
|
|
shared_cache_update_result.m_update_ran ? "yes" : "no",
|
|
shared_cache_update_result.m_num_found);
|
|
|
|
// warn if:
|
|
// - we could not run either expression
|
|
// - we found fewer than num_classes_to_warn_at classes total
|
|
if ((false == shared_cache_update_result.m_update_ran) ||
|
|
(false == dynamic_update_result.m_update_ran))
|
|
WarnIfNoClassesCached(
|
|
SharedCacheWarningReason::eExpressionExecutionFailure);
|
|
else if (dynamic_update_result.m_num_found +
|
|
shared_cache_update_result.m_num_found <
|
|
num_classes_to_warn_at)
|
|
WarnIfNoClassesCached(SharedCacheWarningReason::eNotEnoughClassesRead);
|
|
else
|
|
m_loaded_objc_opt = true;
|
|
}
|
|
} else {
|
|
m_isa_to_descriptor_stop_id = UINT32_MAX;
|
|
}
|
|
}
|
|
|
|
static bool DoesProcessHaveSharedCache(Process &process) {
|
|
PlatformSP platform_sp = process.GetTarget().GetPlatform();
|
|
if (!platform_sp)
|
|
return true; // this should not happen
|
|
|
|
ConstString platform_plugin_name = platform_sp->GetPluginName();
|
|
if (platform_plugin_name) {
|
|
llvm::StringRef platform_plugin_name_sr =
|
|
platform_plugin_name.GetStringRef();
|
|
if (platform_plugin_name_sr.endswith("-simulator"))
|
|
return false;
|
|
}
|
|
|
|
return true;
|
|
}
|
|
|
|
void AppleObjCRuntimeV2::WarnIfNoClassesCached(
|
|
SharedCacheWarningReason reason) {
|
|
if (m_noclasses_warning_emitted)
|
|
return;
|
|
|
|
if (GetProcess() && !DoesProcessHaveSharedCache(*GetProcess())) {
|
|
// Simulators do not have the objc_opt_ro class table so don't actually
|
|
// complain to the user
|
|
m_noclasses_warning_emitted = true;
|
|
return;
|
|
}
|
|
|
|
Debugger &debugger(GetProcess()->GetTarget().GetDebugger());
|
|
if (auto stream = debugger.GetAsyncOutputStream()) {
|
|
switch (reason) {
|
|
case SharedCacheWarningReason::eNotEnoughClassesRead:
|
|
stream->PutCString("warning: could not find Objective-C class data in "
|
|
"the process. This may reduce the quality of type "
|
|
"information available.\n");
|
|
m_noclasses_warning_emitted = true;
|
|
break;
|
|
case SharedCacheWarningReason::eExpressionExecutionFailure:
|
|
stream->PutCString("warning: could not execute support code to read "
|
|
"Objective-C class data in the process. This may "
|
|
"reduce the quality of type information available.\n");
|
|
m_noclasses_warning_emitted = true;
|
|
break;
|
|
}
|
|
}
|
|
}
|
|
|
|
ConstString
|
|
AppleObjCRuntimeV2::GetActualTypeName(ObjCLanguageRuntime::ObjCISA isa) {
|
|
if (isa == g_objc_Tagged_ISA) {
|
|
static const ConstString g_objc_tagged_isa_name("_lldb_Tagged_ObjC_ISA");
|
|
return g_objc_tagged_isa_name;
|
|
}
|
|
if (isa == g_objc_Tagged_ISA_NSAtom) {
|
|
static const ConstString g_objc_tagged_isa_nsatom_name("NSAtom");
|
|
return g_objc_tagged_isa_nsatom_name;
|
|
}
|
|
if (isa == g_objc_Tagged_ISA_NSNumber) {
|
|
static const ConstString g_objc_tagged_isa_nsnumber_name("NSNumber");
|
|
return g_objc_tagged_isa_nsnumber_name;
|
|
}
|
|
if (isa == g_objc_Tagged_ISA_NSDateTS) {
|
|
static const ConstString g_objc_tagged_isa_nsdatets_name("NSDateTS");
|
|
return g_objc_tagged_isa_nsdatets_name;
|
|
}
|
|
if (isa == g_objc_Tagged_ISA_NSManagedObject) {
|
|
static const ConstString g_objc_tagged_isa_nsmanagedobject_name(
|
|
"NSManagedObject");
|
|
return g_objc_tagged_isa_nsmanagedobject_name;
|
|
}
|
|
if (isa == g_objc_Tagged_ISA_NSDate) {
|
|
static const ConstString g_objc_tagged_isa_nsdate_name("NSDate");
|
|
return g_objc_tagged_isa_nsdate_name;
|
|
}
|
|
return ObjCLanguageRuntime::GetActualTypeName(isa);
|
|
}
|
|
|
|
DeclVendor *AppleObjCRuntimeV2::GetDeclVendor() {
|
|
if (!m_decl_vendor_ap.get())
|
|
m_decl_vendor_ap.reset(new AppleObjCDeclVendor(*this));
|
|
|
|
return m_decl_vendor_ap.get();
|
|
}
|
|
|
|
lldb::addr_t AppleObjCRuntimeV2::LookupRuntimeSymbol(const ConstString &name) {
|
|
lldb::addr_t ret = LLDB_INVALID_ADDRESS;
|
|
|
|
const char *name_cstr = name.AsCString();
|
|
|
|
if (name_cstr) {
|
|
llvm::StringRef name_strref(name_cstr);
|
|
|
|
static const llvm::StringRef ivar_prefix("OBJC_IVAR_$_");
|
|
static const llvm::StringRef class_prefix("OBJC_CLASS_$_");
|
|
|
|
if (name_strref.startswith(ivar_prefix)) {
|
|
llvm::StringRef ivar_skipped_prefix =
|
|
name_strref.substr(ivar_prefix.size());
|
|
std::pair<llvm::StringRef, llvm::StringRef> class_and_ivar =
|
|
ivar_skipped_prefix.split('.');
|
|
|
|
if (class_and_ivar.first.size() && class_and_ivar.second.size()) {
|
|
const ConstString class_name_cs(class_and_ivar.first);
|
|
ClassDescriptorSP descriptor =
|
|
ObjCLanguageRuntime::GetClassDescriptorFromClassName(class_name_cs);
|
|
|
|
if (descriptor) {
|
|
const ConstString ivar_name_cs(class_and_ivar.second);
|
|
const char *ivar_name_cstr = ivar_name_cs.AsCString();
|
|
|
|
auto ivar_func = [&ret, ivar_name_cstr](
|
|
const char *name, const char *type, lldb::addr_t offset_addr,
|
|
uint64_t size) -> lldb::addr_t {
|
|
if (!strcmp(name, ivar_name_cstr)) {
|
|
ret = offset_addr;
|
|
return true;
|
|
}
|
|
return false;
|
|
};
|
|
|
|
descriptor->Describe(
|
|
std::function<void(ObjCISA)>(nullptr),
|
|
std::function<bool(const char *, const char *)>(nullptr),
|
|
std::function<bool(const char *, const char *)>(nullptr),
|
|
ivar_func);
|
|
}
|
|
}
|
|
} else if (name_strref.startswith(class_prefix)) {
|
|
llvm::StringRef class_skipped_prefix =
|
|
name_strref.substr(class_prefix.size());
|
|
const ConstString class_name_cs(class_skipped_prefix);
|
|
ClassDescriptorSP descriptor =
|
|
GetClassDescriptorFromClassName(class_name_cs);
|
|
|
|
if (descriptor)
|
|
ret = descriptor->GetISA();
|
|
}
|
|
}
|
|
|
|
return ret;
|
|
}
|
|
|
|
AppleObjCRuntimeV2::NonPointerISACache *
|
|
AppleObjCRuntimeV2::NonPointerISACache::CreateInstance(
|
|
AppleObjCRuntimeV2 &runtime, const lldb::ModuleSP &objc_module_sp) {
|
|
Process *process(runtime.GetProcess());
|
|
|
|
Status error;
|
|
|
|
Log *log(lldb_private::GetLogIfAllCategoriesSet(LIBLLDB_LOG_TYPES));
|
|
|
|
auto objc_debug_isa_magic_mask = ExtractRuntimeGlobalSymbol(
|
|
process, ConstString("objc_debug_isa_magic_mask"), objc_module_sp, error);
|
|
if (error.Fail())
|
|
return NULL;
|
|
|
|
auto objc_debug_isa_magic_value = ExtractRuntimeGlobalSymbol(
|
|
process, ConstString("objc_debug_isa_magic_value"), objc_module_sp,
|
|
error);
|
|
if (error.Fail())
|
|
return NULL;
|
|
|
|
auto objc_debug_isa_class_mask = ExtractRuntimeGlobalSymbol(
|
|
process, ConstString("objc_debug_isa_class_mask"), objc_module_sp, error);
|
|
if (error.Fail())
|
|
return NULL;
|
|
|
|
if (log)
|
|
log->PutCString("AOCRT::NPI: Found all the non-indexed ISA masks");
|
|
|
|
bool foundError = false;
|
|
auto objc_debug_indexed_isa_magic_mask = ExtractRuntimeGlobalSymbol(
|
|
process, ConstString("objc_debug_indexed_isa_magic_mask"), objc_module_sp,
|
|
error);
|
|
foundError |= error.Fail();
|
|
|
|
auto objc_debug_indexed_isa_magic_value = ExtractRuntimeGlobalSymbol(
|
|
process, ConstString("objc_debug_indexed_isa_magic_value"),
|
|
objc_module_sp, error);
|
|
foundError |= error.Fail();
|
|
|
|
auto objc_debug_indexed_isa_index_mask = ExtractRuntimeGlobalSymbol(
|
|
process, ConstString("objc_debug_indexed_isa_index_mask"), objc_module_sp,
|
|
error);
|
|
foundError |= error.Fail();
|
|
|
|
auto objc_debug_indexed_isa_index_shift = ExtractRuntimeGlobalSymbol(
|
|
process, ConstString("objc_debug_indexed_isa_index_shift"),
|
|
objc_module_sp, error);
|
|
foundError |= error.Fail();
|
|
|
|
auto objc_indexed_classes =
|
|
ExtractRuntimeGlobalSymbol(process, ConstString("objc_indexed_classes"),
|
|
objc_module_sp, error, false);
|
|
foundError |= error.Fail();
|
|
|
|
if (log)
|
|
log->PutCString("AOCRT::NPI: Found all the indexed ISA masks");
|
|
|
|
// we might want to have some rules to outlaw these other values (e.g if the
|
|
// mask is zero but the value is non-zero, ...)
|
|
|
|
return new NonPointerISACache(
|
|
runtime, objc_module_sp, objc_debug_isa_class_mask,
|
|
objc_debug_isa_magic_mask, objc_debug_isa_magic_value,
|
|
objc_debug_indexed_isa_magic_mask, objc_debug_indexed_isa_magic_value,
|
|
objc_debug_indexed_isa_index_mask, objc_debug_indexed_isa_index_shift,
|
|
foundError ? 0 : objc_indexed_classes);
|
|
}
|
|
|
|
AppleObjCRuntimeV2::TaggedPointerVendorV2 *
|
|
AppleObjCRuntimeV2::TaggedPointerVendorV2::CreateInstance(
|
|
AppleObjCRuntimeV2 &runtime, const lldb::ModuleSP &objc_module_sp) {
|
|
Process *process(runtime.GetProcess());
|
|
|
|
Status error;
|
|
|
|
auto objc_debug_taggedpointer_mask = ExtractRuntimeGlobalSymbol(
|
|
process, ConstString("objc_debug_taggedpointer_mask"), objc_module_sp,
|
|
error);
|
|
if (error.Fail())
|
|
return new TaggedPointerVendorLegacy(runtime);
|
|
|
|
auto objc_debug_taggedpointer_slot_shift = ExtractRuntimeGlobalSymbol(
|
|
process, ConstString("objc_debug_taggedpointer_slot_shift"),
|
|
objc_module_sp, error, true, 4);
|
|
if (error.Fail())
|
|
return new TaggedPointerVendorLegacy(runtime);
|
|
|
|
auto objc_debug_taggedpointer_slot_mask = ExtractRuntimeGlobalSymbol(
|
|
process, ConstString("objc_debug_taggedpointer_slot_mask"),
|
|
objc_module_sp, error, true, 4);
|
|
if (error.Fail())
|
|
return new TaggedPointerVendorLegacy(runtime);
|
|
|
|
auto objc_debug_taggedpointer_payload_lshift = ExtractRuntimeGlobalSymbol(
|
|
process, ConstString("objc_debug_taggedpointer_payload_lshift"),
|
|
objc_module_sp, error, true, 4);
|
|
if (error.Fail())
|
|
return new TaggedPointerVendorLegacy(runtime);
|
|
|
|
auto objc_debug_taggedpointer_payload_rshift = ExtractRuntimeGlobalSymbol(
|
|
process, ConstString("objc_debug_taggedpointer_payload_rshift"),
|
|
objc_module_sp, error, true, 4);
|
|
if (error.Fail())
|
|
return new TaggedPointerVendorLegacy(runtime);
|
|
|
|
auto objc_debug_taggedpointer_classes = ExtractRuntimeGlobalSymbol(
|
|
process, ConstString("objc_debug_taggedpointer_classes"), objc_module_sp,
|
|
error, false);
|
|
if (error.Fail())
|
|
return new TaggedPointerVendorLegacy(runtime);
|
|
|
|
// try to detect the "extended tagged pointer" variables - if any are missing,
|
|
// use the non-extended vendor
|
|
do {
|
|
auto objc_debug_taggedpointer_ext_mask = ExtractRuntimeGlobalSymbol(
|
|
process, ConstString("objc_debug_taggedpointer_ext_mask"),
|
|
objc_module_sp, error);
|
|
if (error.Fail())
|
|
break;
|
|
|
|
auto objc_debug_taggedpointer_ext_slot_shift = ExtractRuntimeGlobalSymbol(
|
|
process, ConstString("objc_debug_taggedpointer_ext_slot_shift"),
|
|
objc_module_sp, error, true, 4);
|
|
if (error.Fail())
|
|
break;
|
|
|
|
auto objc_debug_taggedpointer_ext_slot_mask = ExtractRuntimeGlobalSymbol(
|
|
process, ConstString("objc_debug_taggedpointer_ext_slot_mask"),
|
|
objc_module_sp, error, true, 4);
|
|
if (error.Fail())
|
|
break;
|
|
|
|
auto objc_debug_taggedpointer_ext_classes = ExtractRuntimeGlobalSymbol(
|
|
process, ConstString("objc_debug_taggedpointer_ext_classes"),
|
|
objc_module_sp, error, false);
|
|
if (error.Fail())
|
|
break;
|
|
|
|
auto objc_debug_taggedpointer_ext_payload_lshift =
|
|
ExtractRuntimeGlobalSymbol(
|
|
process, ConstString("objc_debug_taggedpointer_ext_payload_lshift"),
|
|
objc_module_sp, error, true, 4);
|
|
if (error.Fail())
|
|
break;
|
|
|
|
auto objc_debug_taggedpointer_ext_payload_rshift =
|
|
ExtractRuntimeGlobalSymbol(
|
|
process, ConstString("objc_debug_taggedpointer_ext_payload_rshift"),
|
|
objc_module_sp, error, true, 4);
|
|
if (error.Fail())
|
|
break;
|
|
|
|
return new TaggedPointerVendorExtended(
|
|
runtime, objc_debug_taggedpointer_mask,
|
|
objc_debug_taggedpointer_ext_mask, objc_debug_taggedpointer_slot_shift,
|
|
objc_debug_taggedpointer_ext_slot_shift,
|
|
objc_debug_taggedpointer_slot_mask,
|
|
objc_debug_taggedpointer_ext_slot_mask,
|
|
objc_debug_taggedpointer_payload_lshift,
|
|
objc_debug_taggedpointer_payload_rshift,
|
|
objc_debug_taggedpointer_ext_payload_lshift,
|
|
objc_debug_taggedpointer_ext_payload_rshift,
|
|
objc_debug_taggedpointer_classes, objc_debug_taggedpointer_ext_classes);
|
|
} while (false);
|
|
|
|
// we might want to have some rules to outlaw these values (e.g if the table's
|
|
// address is zero)
|
|
|
|
return new TaggedPointerVendorRuntimeAssisted(
|
|
runtime, objc_debug_taggedpointer_mask,
|
|
objc_debug_taggedpointer_slot_shift, objc_debug_taggedpointer_slot_mask,
|
|
objc_debug_taggedpointer_payload_lshift,
|
|
objc_debug_taggedpointer_payload_rshift,
|
|
objc_debug_taggedpointer_classes);
|
|
}
|
|
|
|
bool AppleObjCRuntimeV2::TaggedPointerVendorLegacy::IsPossibleTaggedPointer(
|
|
lldb::addr_t ptr) {
|
|
return (ptr & 1);
|
|
}
|
|
|
|
ObjCLanguageRuntime::ClassDescriptorSP
|
|
AppleObjCRuntimeV2::TaggedPointerVendorLegacy::GetClassDescriptor(
|
|
lldb::addr_t ptr) {
|
|
if (!IsPossibleTaggedPointer(ptr))
|
|
return ObjCLanguageRuntime::ClassDescriptorSP();
|
|
|
|
uint32_t foundation_version = m_runtime.GetFoundationVersion();
|
|
|
|
if (foundation_version == LLDB_INVALID_MODULE_VERSION)
|
|
return ObjCLanguageRuntime::ClassDescriptorSP();
|
|
|
|
uint64_t class_bits = (ptr & 0xE) >> 1;
|
|
ConstString name;
|
|
|
|
static ConstString g_NSAtom("NSAtom");
|
|
static ConstString g_NSNumber("NSNumber");
|
|
static ConstString g_NSDateTS("NSDateTS");
|
|
static ConstString g_NSManagedObject("NSManagedObject");
|
|
static ConstString g_NSDate("NSDate");
|
|
|
|
if (foundation_version >= 900) {
|
|
switch (class_bits) {
|
|
case 0:
|
|
name = g_NSAtom;
|
|
break;
|
|
case 3:
|
|
name = g_NSNumber;
|
|
break;
|
|
case 4:
|
|
name = g_NSDateTS;
|
|
break;
|
|
case 5:
|
|
name = g_NSManagedObject;
|
|
break;
|
|
case 6:
|
|
name = g_NSDate;
|
|
break;
|
|
default:
|
|
return ObjCLanguageRuntime::ClassDescriptorSP();
|
|
}
|
|
} else {
|
|
switch (class_bits) {
|
|
case 1:
|
|
name = g_NSNumber;
|
|
break;
|
|
case 5:
|
|
name = g_NSManagedObject;
|
|
break;
|
|
case 6:
|
|
name = g_NSDate;
|
|
break;
|
|
case 7:
|
|
name = g_NSDateTS;
|
|
break;
|
|
default:
|
|
return ObjCLanguageRuntime::ClassDescriptorSP();
|
|
}
|
|
}
|
|
return ClassDescriptorSP(new ClassDescriptorV2Tagged(name, ptr));
|
|
}
|
|
|
|
AppleObjCRuntimeV2::TaggedPointerVendorRuntimeAssisted::
|
|
TaggedPointerVendorRuntimeAssisted(
|
|
AppleObjCRuntimeV2 &runtime, uint64_t objc_debug_taggedpointer_mask,
|
|
uint32_t objc_debug_taggedpointer_slot_shift,
|
|
uint32_t objc_debug_taggedpointer_slot_mask,
|
|
uint32_t objc_debug_taggedpointer_payload_lshift,
|
|
uint32_t objc_debug_taggedpointer_payload_rshift,
|
|
lldb::addr_t objc_debug_taggedpointer_classes)
|
|
: TaggedPointerVendorV2(runtime), m_cache(),
|
|
m_objc_debug_taggedpointer_mask(objc_debug_taggedpointer_mask),
|
|
m_objc_debug_taggedpointer_slot_shift(
|
|
objc_debug_taggedpointer_slot_shift),
|
|
m_objc_debug_taggedpointer_slot_mask(objc_debug_taggedpointer_slot_mask),
|
|
m_objc_debug_taggedpointer_payload_lshift(
|
|
objc_debug_taggedpointer_payload_lshift),
|
|
m_objc_debug_taggedpointer_payload_rshift(
|
|
objc_debug_taggedpointer_payload_rshift),
|
|
m_objc_debug_taggedpointer_classes(objc_debug_taggedpointer_classes) {}
|
|
|
|
bool AppleObjCRuntimeV2::TaggedPointerVendorRuntimeAssisted::
|
|
IsPossibleTaggedPointer(lldb::addr_t ptr) {
|
|
return (ptr & m_objc_debug_taggedpointer_mask) != 0;
|
|
}
|
|
|
|
ObjCLanguageRuntime::ClassDescriptorSP
|
|
AppleObjCRuntimeV2::TaggedPointerVendorRuntimeAssisted::GetClassDescriptor(
|
|
lldb::addr_t ptr) {
|
|
ClassDescriptorSP actual_class_descriptor_sp;
|
|
uint64_t data_payload;
|
|
|
|
if (!IsPossibleTaggedPointer(ptr))
|
|
return ObjCLanguageRuntime::ClassDescriptorSP();
|
|
|
|
uintptr_t slot = (ptr >> m_objc_debug_taggedpointer_slot_shift) &
|
|
m_objc_debug_taggedpointer_slot_mask;
|
|
|
|
CacheIterator iterator = m_cache.find(slot), end = m_cache.end();
|
|
if (iterator != end) {
|
|
actual_class_descriptor_sp = iterator->second;
|
|
} else {
|
|
Process *process(m_runtime.GetProcess());
|
|
uintptr_t slot_ptr = slot * process->GetAddressByteSize() +
|
|
m_objc_debug_taggedpointer_classes;
|
|
Status error;
|
|
uintptr_t slot_data = process->ReadPointerFromMemory(slot_ptr, error);
|
|
if (error.Fail() || slot_data == 0 ||
|
|
slot_data == uintptr_t(LLDB_INVALID_ADDRESS))
|
|
return nullptr;
|
|
actual_class_descriptor_sp =
|
|
m_runtime.GetClassDescriptorFromISA((ObjCISA)slot_data);
|
|
if (!actual_class_descriptor_sp)
|
|
return ObjCLanguageRuntime::ClassDescriptorSP();
|
|
m_cache[slot] = actual_class_descriptor_sp;
|
|
}
|
|
|
|
data_payload =
|
|
(((uint64_t)ptr << m_objc_debug_taggedpointer_payload_lshift) >>
|
|
m_objc_debug_taggedpointer_payload_rshift);
|
|
|
|
return ClassDescriptorSP(
|
|
new ClassDescriptorV2Tagged(actual_class_descriptor_sp, data_payload));
|
|
}
|
|
|
|
AppleObjCRuntimeV2::TaggedPointerVendorExtended::TaggedPointerVendorExtended(
|
|
AppleObjCRuntimeV2 &runtime, uint64_t objc_debug_taggedpointer_mask,
|
|
uint64_t objc_debug_taggedpointer_ext_mask,
|
|
uint32_t objc_debug_taggedpointer_slot_shift,
|
|
uint32_t objc_debug_taggedpointer_ext_slot_shift,
|
|
uint32_t objc_debug_taggedpointer_slot_mask,
|
|
uint32_t objc_debug_taggedpointer_ext_slot_mask,
|
|
uint32_t objc_debug_taggedpointer_payload_lshift,
|
|
uint32_t objc_debug_taggedpointer_payload_rshift,
|
|
uint32_t objc_debug_taggedpointer_ext_payload_lshift,
|
|
uint32_t objc_debug_taggedpointer_ext_payload_rshift,
|
|
lldb::addr_t objc_debug_taggedpointer_classes,
|
|
lldb::addr_t objc_debug_taggedpointer_ext_classes)
|
|
: TaggedPointerVendorRuntimeAssisted(
|
|
runtime, objc_debug_taggedpointer_mask,
|
|
objc_debug_taggedpointer_slot_shift,
|
|
objc_debug_taggedpointer_slot_mask,
|
|
objc_debug_taggedpointer_payload_lshift,
|
|
objc_debug_taggedpointer_payload_rshift,
|
|
objc_debug_taggedpointer_classes),
|
|
m_ext_cache(),
|
|
m_objc_debug_taggedpointer_ext_mask(objc_debug_taggedpointer_ext_mask),
|
|
m_objc_debug_taggedpointer_ext_slot_shift(
|
|
objc_debug_taggedpointer_ext_slot_shift),
|
|
m_objc_debug_taggedpointer_ext_slot_mask(
|
|
objc_debug_taggedpointer_ext_slot_mask),
|
|
m_objc_debug_taggedpointer_ext_payload_lshift(
|
|
objc_debug_taggedpointer_ext_payload_lshift),
|
|
m_objc_debug_taggedpointer_ext_payload_rshift(
|
|
objc_debug_taggedpointer_ext_payload_rshift),
|
|
m_objc_debug_taggedpointer_ext_classes(
|
|
objc_debug_taggedpointer_ext_classes) {}
|
|
|
|
bool AppleObjCRuntimeV2::TaggedPointerVendorExtended::
|
|
IsPossibleExtendedTaggedPointer(lldb::addr_t ptr) {
|
|
if (!IsPossibleTaggedPointer(ptr))
|
|
return false;
|
|
|
|
if (m_objc_debug_taggedpointer_ext_mask == 0)
|
|
return false;
|
|
|
|
return ((ptr & m_objc_debug_taggedpointer_ext_mask) ==
|
|
m_objc_debug_taggedpointer_ext_mask);
|
|
}
|
|
|
|
ObjCLanguageRuntime::ClassDescriptorSP
|
|
AppleObjCRuntimeV2::TaggedPointerVendorExtended::GetClassDescriptor(
|
|
lldb::addr_t ptr) {
|
|
ClassDescriptorSP actual_class_descriptor_sp;
|
|
uint64_t data_payload;
|
|
|
|
if (!IsPossibleTaggedPointer(ptr))
|
|
return ObjCLanguageRuntime::ClassDescriptorSP();
|
|
|
|
if (!IsPossibleExtendedTaggedPointer(ptr))
|
|
return this->TaggedPointerVendorRuntimeAssisted::GetClassDescriptor(ptr);
|
|
|
|
uintptr_t slot = (ptr >> m_objc_debug_taggedpointer_ext_slot_shift) &
|
|
m_objc_debug_taggedpointer_ext_slot_mask;
|
|
|
|
CacheIterator iterator = m_ext_cache.find(slot), end = m_ext_cache.end();
|
|
if (iterator != end) {
|
|
actual_class_descriptor_sp = iterator->second;
|
|
} else {
|
|
Process *process(m_runtime.GetProcess());
|
|
uintptr_t slot_ptr = slot * process->GetAddressByteSize() +
|
|
m_objc_debug_taggedpointer_ext_classes;
|
|
Status error;
|
|
uintptr_t slot_data = process->ReadPointerFromMemory(slot_ptr, error);
|
|
if (error.Fail() || slot_data == 0 ||
|
|
slot_data == uintptr_t(LLDB_INVALID_ADDRESS))
|
|
return nullptr;
|
|
actual_class_descriptor_sp =
|
|
m_runtime.GetClassDescriptorFromISA((ObjCISA)slot_data);
|
|
if (!actual_class_descriptor_sp)
|
|
return ObjCLanguageRuntime::ClassDescriptorSP();
|
|
m_ext_cache[slot] = actual_class_descriptor_sp;
|
|
}
|
|
|
|
data_payload =
|
|
(((uint64_t)ptr << m_objc_debug_taggedpointer_ext_payload_lshift) >>
|
|
m_objc_debug_taggedpointer_ext_payload_rshift);
|
|
|
|
return ClassDescriptorSP(
|
|
new ClassDescriptorV2Tagged(actual_class_descriptor_sp, data_payload));
|
|
}
|
|
|
|
AppleObjCRuntimeV2::NonPointerISACache::NonPointerISACache(
|
|
AppleObjCRuntimeV2 &runtime, const ModuleSP &objc_module_sp,
|
|
uint64_t objc_debug_isa_class_mask, uint64_t objc_debug_isa_magic_mask,
|
|
uint64_t objc_debug_isa_magic_value,
|
|
uint64_t objc_debug_indexed_isa_magic_mask,
|
|
uint64_t objc_debug_indexed_isa_magic_value,
|
|
uint64_t objc_debug_indexed_isa_index_mask,
|
|
uint64_t objc_debug_indexed_isa_index_shift,
|
|
lldb::addr_t objc_indexed_classes)
|
|
: m_runtime(runtime), m_cache(), m_objc_module_wp(objc_module_sp),
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m_objc_debug_isa_class_mask(objc_debug_isa_class_mask),
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m_objc_debug_isa_magic_mask(objc_debug_isa_magic_mask),
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|
m_objc_debug_isa_magic_value(objc_debug_isa_magic_value),
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|
m_objc_debug_indexed_isa_magic_mask(objc_debug_indexed_isa_magic_mask),
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|
m_objc_debug_indexed_isa_magic_value(objc_debug_indexed_isa_magic_value),
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|
m_objc_debug_indexed_isa_index_mask(objc_debug_indexed_isa_index_mask),
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|
m_objc_debug_indexed_isa_index_shift(objc_debug_indexed_isa_index_shift),
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|
m_objc_indexed_classes(objc_indexed_classes), m_indexed_isa_cache() {}
|
|
|
|
ObjCLanguageRuntime::ClassDescriptorSP
|
|
AppleObjCRuntimeV2::NonPointerISACache::GetClassDescriptor(ObjCISA isa) {
|
|
ObjCISA real_isa = 0;
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|
if (EvaluateNonPointerISA(isa, real_isa) == false)
|
|
return ObjCLanguageRuntime::ClassDescriptorSP();
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|
auto cache_iter = m_cache.find(real_isa);
|
|
if (cache_iter != m_cache.end())
|
|
return cache_iter->second;
|
|
auto descriptor_sp =
|
|
m_runtime.ObjCLanguageRuntime::GetClassDescriptorFromISA(real_isa);
|
|
if (descriptor_sp) // cache only positive matches since the table might grow
|
|
m_cache[real_isa] = descriptor_sp;
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|
return descriptor_sp;
|
|
}
|
|
|
|
bool AppleObjCRuntimeV2::NonPointerISACache::EvaluateNonPointerISA(
|
|
ObjCISA isa, ObjCISA &ret_isa) {
|
|
Log *log(lldb_private::GetLogIfAllCategoriesSet(LIBLLDB_LOG_TYPES));
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|
|
|
if (log)
|
|
log->Printf("AOCRT::NPI Evalulate(isa = 0x%" PRIx64 ")", (uint64_t)isa);
|
|
|
|
if ((isa & ~m_objc_debug_isa_class_mask) == 0)
|
|
return false;
|
|
|
|
// If all of the indexed ISA variables are set, then its possible that
|
|
// this ISA is indexed, and we should first try to get its value using
|
|
// the index.
|
|
// Note, we check these varaibles first as the ObjC runtime will set at
|
|
// least one of their values to 0 if they aren't needed.
|
|
if (m_objc_debug_indexed_isa_magic_mask &&
|
|
m_objc_debug_indexed_isa_magic_value &&
|
|
m_objc_debug_indexed_isa_index_mask &&
|
|
m_objc_debug_indexed_isa_index_shift && m_objc_indexed_classes) {
|
|
if ((isa & ~m_objc_debug_indexed_isa_index_mask) == 0)
|
|
return false;
|
|
|
|
if ((isa & m_objc_debug_indexed_isa_magic_mask) ==
|
|
m_objc_debug_indexed_isa_magic_value) {
|
|
// Magic bits are correct, so try extract the index.
|
|
uintptr_t index = (isa & m_objc_debug_indexed_isa_index_mask) >>
|
|
m_objc_debug_indexed_isa_index_shift;
|
|
// If the index is out of bounds of the length of the array then
|
|
// check if the array has been updated. If that is the case then
|
|
// we should try read the count again, and update the cache if the
|
|
// count has been updated.
|
|
if (index > m_indexed_isa_cache.size()) {
|
|
if (log)
|
|
log->Printf("AOCRT::NPI (index = %" PRIu64
|
|
") exceeds cache (size = %" PRIu64 ")",
|
|
(uint64_t)index, (uint64_t)m_indexed_isa_cache.size());
|
|
|
|
Process *process(m_runtime.GetProcess());
|
|
|
|
ModuleSP objc_module_sp(m_objc_module_wp.lock());
|
|
if (!objc_module_sp)
|
|
return false;
|
|
|
|
Status error;
|
|
auto objc_indexed_classes_count = ExtractRuntimeGlobalSymbol(
|
|
process, ConstString("objc_indexed_classes_count"), objc_module_sp,
|
|
error);
|
|
if (error.Fail())
|
|
return false;
|
|
|
|
if (log)
|
|
log->Printf("AOCRT::NPI (new class count = %" PRIu64 ")",
|
|
(uint64_t)objc_indexed_classes_count);
|
|
|
|
if (objc_indexed_classes_count > m_indexed_isa_cache.size()) {
|
|
// Read the class entries we don't have. We should just
|
|
// read all of them instead of just the one we need as then
|
|
// we can cache those we may need later.
|
|
auto num_new_classes =
|
|
objc_indexed_classes_count - m_indexed_isa_cache.size();
|
|
const uint32_t addr_size = process->GetAddressByteSize();
|
|
DataBufferHeap buffer(num_new_classes * addr_size, 0);
|
|
|
|
lldb::addr_t last_read_class =
|
|
m_objc_indexed_classes + (m_indexed_isa_cache.size() * addr_size);
|
|
size_t bytes_read = process->ReadMemory(
|
|
last_read_class, buffer.GetBytes(), buffer.GetByteSize(), error);
|
|
if (error.Fail() || bytes_read != buffer.GetByteSize())
|
|
return false;
|
|
|
|
if (log)
|
|
log->Printf("AOCRT::NPI (read new classes count = %" PRIu64 ")",
|
|
(uint64_t)num_new_classes);
|
|
|
|
// Append the new entries to the existing cache.
|
|
DataExtractor data(buffer.GetBytes(), buffer.GetByteSize(),
|
|
process->GetByteOrder(),
|
|
process->GetAddressByteSize());
|
|
|
|
lldb::offset_t offset = 0;
|
|
for (unsigned i = 0; i != num_new_classes; ++i)
|
|
m_indexed_isa_cache.push_back(data.GetPointer(&offset));
|
|
}
|
|
}
|
|
|
|
// If the index is still out of range then this isn't a pointer.
|
|
if (index > m_indexed_isa_cache.size())
|
|
return false;
|
|
|
|
if (log)
|
|
log->Printf("AOCRT::NPI Evalulate(ret_isa = 0x%" PRIx64 ")",
|
|
(uint64_t)m_indexed_isa_cache[index]);
|
|
|
|
ret_isa = m_indexed_isa_cache[index];
|
|
return (ret_isa != 0); // this is a pointer so 0 is not a valid value
|
|
}
|
|
|
|
return false;
|
|
}
|
|
|
|
// Definately not an indexed ISA, so try to use a mask to extract
|
|
// the pointer from the ISA.
|
|
if ((isa & m_objc_debug_isa_magic_mask) == m_objc_debug_isa_magic_value) {
|
|
ret_isa = isa & m_objc_debug_isa_class_mask;
|
|
return (ret_isa != 0); // this is a pointer so 0 is not a valid value
|
|
}
|
|
return false;
|
|
}
|
|
|
|
ObjCLanguageRuntime::EncodingToTypeSP AppleObjCRuntimeV2::GetEncodingToType() {
|
|
if (!m_encoding_to_type_sp)
|
|
m_encoding_to_type_sp.reset(new AppleObjCTypeEncodingParser(*this));
|
|
return m_encoding_to_type_sp;
|
|
}
|
|
|
|
lldb_private::AppleObjCRuntime::ObjCISA
|
|
AppleObjCRuntimeV2::GetPointerISA(ObjCISA isa) {
|
|
ObjCISA ret = isa;
|
|
|
|
if (m_non_pointer_isa_cache_ap)
|
|
m_non_pointer_isa_cache_ap->EvaluateNonPointerISA(isa, ret);
|
|
|
|
return ret;
|
|
}
|
|
|
|
bool AppleObjCRuntimeV2::GetCFBooleanValuesIfNeeded() {
|
|
if (m_CFBoolean_values)
|
|
return true;
|
|
|
|
static ConstString g_kCFBooleanFalse("kCFBooleanFalse");
|
|
static ConstString g_kCFBooleanTrue("kCFBooleanTrue");
|
|
|
|
std::function<lldb::addr_t(ConstString)> get_symbol =
|
|
[this](ConstString sym) -> lldb::addr_t {
|
|
SymbolContextList sc_list;
|
|
if (GetProcess()->GetTarget().GetImages().FindSymbolsWithNameAndType(
|
|
g_kCFBooleanFalse, lldb::eSymbolTypeData, sc_list) == 1) {
|
|
SymbolContext sc;
|
|
sc_list.GetContextAtIndex(0, sc);
|
|
if (sc.symbol)
|
|
return sc.symbol->GetLoadAddress(&GetProcess()->GetTarget());
|
|
}
|
|
|
|
return LLDB_INVALID_ADDRESS;
|
|
};
|
|
|
|
lldb::addr_t false_addr = get_symbol(g_kCFBooleanFalse);
|
|
lldb::addr_t true_addr = get_symbol(g_kCFBooleanTrue);
|
|
|
|
return (m_CFBoolean_values = {false_addr, true_addr}).operator bool();
|
|
}
|
|
|
|
void AppleObjCRuntimeV2::GetValuesForGlobalCFBooleans(lldb::addr_t &cf_true,
|
|
lldb::addr_t &cf_false) {
|
|
if (GetCFBooleanValuesIfNeeded()) {
|
|
cf_true = m_CFBoolean_values->second;
|
|
cf_false = m_CFBoolean_values->first;
|
|
} else
|
|
this->AppleObjCRuntime::GetValuesForGlobalCFBooleans(cf_true, cf_false);
|
|
}
|