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Issue 1251593007: Add support for Linux memory mapping stream and remove ELF header usage (Closed) Base URL: http://google-breakpad.googlecode.com/svn/trunk/
Patch Set: Created 5 years, 4 months ago
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1 // Copyright (c) 2010 Google Inc. 1 // Copyright (c) 2010 Google Inc.
2 // All rights reserved. 2 // All rights reserved.
3 // 3 //
4 // Redistribution and use in source and binary forms, with or without 4 // Redistribution and use in source and binary forms, with or without
5 // modification, are permitted provided that the following conditions are 5 // modification, are permitted provided that the following conditions are
6 // met: 6 // met:
7 // 7 //
8 // * Redistributions of source code must retain the above copyright 8 // * Redistributions of source code must retain the above copyright
9 // notice, this list of conditions and the following disclaimer. 9 // notice, this list of conditions and the following disclaimer.
10 // * Redistributions in binary form must reproduce the above 10 // * Redistributions in binary form must reproduce the above
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48 #define PRIx32 "lx" 48 #define PRIx32 "lx"
49 #define snprintf _snprintf 49 #define snprintf _snprintf
50 #else // _WIN32 50 #else // _WIN32
51 #include <unistd.h> 51 #include <unistd.h>
52 #endif // _WIN32 52 #endif // _WIN32
53 53
54 #include <fstream> 54 #include <fstream>
55 #include <iostream> 55 #include <iostream>
56 #include <limits> 56 #include <limits>
57 #include <map> 57 #include <map>
58 #include <sstream>
58 #include <vector> 59 #include <vector>
59 60
60 #include "processor/range_map-inl.h" 61 #include "processor/range_map-inl.h"
61 62
62 #include "common/scoped_ptr.h" 63 #include "common/scoped_ptr.h"
63 #include "google_breakpad/processor/dump_context.h" 64 #include "google_breakpad/processor/dump_context.h"
64 #include "processor/basic_code_module.h" 65 #include "processor/basic_code_module.h"
65 #include "processor/basic_code_modules.h" 66 #include "processor/basic_code_modules.h"
66 #include "processor/logging.h" 67 #include "processor/logging.h"
67 68
68 namespace google_breakpad { 69 namespace google_breakpad {
69 70
70 71
71 using std::istream; 72 using std::istream;
72 using std::ifstream; 73 using std::ifstream;
73 using std::numeric_limits; 74 using std::numeric_limits;
75 using std::stringstream;
74 using std::vector; 76 using std::vector;
75 77
76 // Returns true iff |context_size| matches exactly one of the sizes of the 78 // Returns true iff |context_size| matches exactly one of the sizes of the
77 // various MDRawContext* types. 79 // various MDRawContext* types.
78 // TODO(blundell): This function can be removed once 80 // TODO(blundell): This function can be removed once
79 // http://code.google.com/p/google-breakpad/issues/detail?id=550 is fixed. 81 // http://code.google.com/p/google-breakpad/issues/detail?id=550 is fixed.
80 static bool IsContextSizeUnique(uint32_t context_size) { 82 static bool IsContextSizeUnique(uint32_t context_size) {
81 int num_matching_contexts = 0; 83 int num_matching_contexts = 0;
82 if (context_size == sizeof(MDRawContextX86)) 84 if (context_size == sizeof(MDRawContextX86))
83 num_matching_contexts++; 85 num_matching_contexts++;
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3965 3967
3966 for (unsigned int info_index = 0; 3968 for (unsigned int info_index = 0;
3967 info_index < info_count_; 3969 info_index < info_count_;
3968 ++info_index) { 3970 ++info_index) {
3969 printf("info[%d]\n", info_index); 3971 printf("info[%d]\n", info_index);
3970 (*infos_)[info_index].Print(); 3972 (*infos_)[info_index].Print();
3971 printf("\n"); 3973 printf("\n");
3972 } 3974 }
3973 } 3975 }
3974 3976
3977 //
3978 // MinidumpLinuxMaps
3979 //
3980
3981 MinidumpLinuxMaps::MinidumpLinuxMaps(Minidump *minidump)
3982 : MinidumpObject(minidump) {
3983 }
3984
3985 void MinidumpLinuxMaps::Print() {
3986 if (!valid_) {
3987 BPLOG(ERROR) << "MinidumpLinuxMaps cannot print invalid data";
3988 return;
3989 }
3990 std::cout << GetPathname() << std::endl;
3991 }
3992
3993 //
3994 // MinidumpLinuxMapsList
3995 //
3996
3997 MinidumpLinuxMapsList::MinidumpLinuxMapsList(Minidump *minidump)
3998 : MinidumpStream(minidump),
3999 maps_(NULL),
4000 maps_count_(0) {
4001 }
4002
4003 MinidumpLinuxMapsList::~MinidumpLinuxMapsList() {
4004 for (unsigned int i = 0; i < maps_->size(); i++) {
4005 delete (*maps_)[i];
4006 }
4007 delete maps_;
4008 }
4009
4010 const MinidumpLinuxMaps *MinidumpLinuxMapsList::GetLinuxMapsForAddress(
4011 uint64_t address) const {
4012 if (!valid_) {
4013 BPLOG(ERROR) << "Invalid MinidumpLinuxMapsList for GetLinuxMapsForAddress";
4014 return NULL;
4015 }
4016
4017 // Search every memory mapping.
4018 for (unsigned int index = 0; index < maps_count_; index++) {
4019 // Check if address is within bounds of the current memory region.
4020 if ((*maps_)[index]->GetBase() <= address &&
4021 (*maps_)[index]->GetBase() + (*maps_)[index]->GetSize() > address) {
4022 return (*maps_)[index];
4023 }
4024 }
4025
4026 // No mapping encloses the memory address.
4027 BPLOG(ERROR) << "MinidumpLinuxMapsList has no mapping at "
4028 << HexString(address);
4029 return NULL;
4030 }
4031
4032 const MinidumpLinuxMaps *MinidumpLinuxMapsList::GetLinuxMapsAtIndex(
4033 unsigned int index) const {
4034 if (!valid_) {
4035 BPLOG(ERROR) << "Invalid MinidumpLinuxMapsList for GetLinuxMapsAtIndex";
4036 return NULL;
4037 }
4038
4039 // Index out of bounds.
4040 if (index >= maps_count_) {
4041 BPLOG(ERROR) << "MinidumpLinuxMapsList index of out range: "
4042 << index
4043 << "/"
4044 << maps_count_;
4045 return NULL;
4046 }
4047 return (*maps_)[index];
4048 }
4049
4050 bool MinidumpLinuxMapsList::Read(uint32_t expected_size) {
4051 // Invalidate cached data.
4052 delete maps_;
4053 maps_ = NULL;
4054 maps_count_ = 0;
4055
4056 valid_ = false;
4057
4058 // Load and check expected stream length.
4059 uint32_t length = 0;
4060 if (!minidump_->SeekToStreamType(MD_LINUX_MAPS, &length)) {
4061 BPLOG(ERROR) << "MinidumpLinuxMapsList stream type not found";
4062 return false;
4063 }
4064 if (expected_size != length) {
4065 BPLOG(ERROR) << "MinidumpLinuxMapsList size mismatch: "
4066 << expected_size
4067 << " != "
4068 << length;
4069 return false;
4070 }
4071
4072 // Create a vector to read stream data. The vector needs to have
4073 // at least enough capacity to read all the data.
4074 vector<char> mapping_bytes(length);
4075 if (!minidump_->ReadBytes(&mapping_bytes[0], length)) {
4076 BPLOG(ERROR) << "MinidumpLinuxMapsList failed to read bytes";
4077 return false;
4078 }
4079 string map_string(mapping_bytes.begin(), mapping_bytes.end());
4080 vector<MappedMemoryRegion> all_regions;
4081
4082 // Parse string into mapping data.
4083 if (!ParseProcMaps(map_string, &all_regions)) {
4084 return false;
4085 }
4086
4087 scoped_ptr<MinidumpLinuxMappings> maps(new MinidumpLinuxMappings());
4088
4089 // Push mapping data into wrapper classes.
4090 for (size_t i = 0; i < all_regions.size(); i++) {
4091 scoped_ptr<MinidumpLinuxMaps> ele(new MinidumpLinuxMaps(minidump_));
4092 ele->region_ = all_regions[i];
4093 ele->valid_ = true;
4094 maps->push_back(ele.release());
4095 }
4096
4097 // Set instance variables.
4098 maps_ = maps.release();
4099 maps_count_ = maps_->size();
4100 valid_ = true;
4101 return true;
4102 }
4103
4104 void MinidumpLinuxMapsList::Print() {
4105 if (!valid_) {
4106 BPLOG(ERROR) << "MinidumpLinuxMapsList cannot print valid data";
4107 return;
4108 }
4109 for (size_t i = 0; i < maps_->size(); i++) {
4110 (*maps_)[i]->Print();
4111 }
4112 }
3975 4113
3976 // 4114 //
3977 // Minidump 4115 // Minidump
3978 // 4116 //
3979 4117
3980 4118
3981 uint32_t Minidump::max_streams_ = 128; 4119 uint32_t Minidump::max_streams_ = 128;
3982 unsigned int Minidump::max_string_length_ = 1024; 4120 unsigned int Minidump::max_string_length_ = 1024;
3983 4121
3984 4122
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4285 MinidumpBreakpadInfo* Minidump::GetBreakpadInfo() { 4423 MinidumpBreakpadInfo* Minidump::GetBreakpadInfo() {
4286 MinidumpBreakpadInfo* breakpad_info; 4424 MinidumpBreakpadInfo* breakpad_info;
4287 return GetStream(&breakpad_info); 4425 return GetStream(&breakpad_info);
4288 } 4426 }
4289 4427
4290 MinidumpMemoryInfoList* Minidump::GetMemoryInfoList() { 4428 MinidumpMemoryInfoList* Minidump::GetMemoryInfoList() {
4291 MinidumpMemoryInfoList* memory_info_list; 4429 MinidumpMemoryInfoList* memory_info_list;
4292 return GetStream(&memory_info_list); 4430 return GetStream(&memory_info_list);
4293 } 4431 }
4294 4432
4433 MinidumpLinuxMapsList *Minidump::GetLinuxMapsList() {
4434 MinidumpLinuxMapsList *linux_maps_list;
4435 return GetStream(&linux_maps_list);
4436 }
4437
4295 static const char* get_stream_name(uint32_t stream_type) { 4438 static const char* get_stream_name(uint32_t stream_type) {
4296 switch (stream_type) { 4439 switch (stream_type) {
4297 case MD_UNUSED_STREAM: 4440 case MD_UNUSED_STREAM:
4298 return "MD_UNUSED_STREAM"; 4441 return "MD_UNUSED_STREAM";
4299 case MD_RESERVED_STREAM_0: 4442 case MD_RESERVED_STREAM_0:
4300 return "MD_RESERVED_STREAM_0"; 4443 return "MD_RESERVED_STREAM_0";
4301 case MD_RESERVED_STREAM_1: 4444 case MD_RESERVED_STREAM_1:
4302 return "MD_RESERVED_STREAM_1"; 4445 return "MD_RESERVED_STREAM_1";
4303 case MD_THREAD_LIST_STREAM: 4446 case MD_THREAD_LIST_STREAM:
4304 return "MD_THREAD_LIST_STREAM"; 4447 return "MD_THREAD_LIST_STREAM";
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4622 return NULL; 4765 return NULL;
4623 } 4766 }
4624 4767
4625 *stream = new_stream.release(); 4768 *stream = new_stream.release();
4626 info->stream = *stream; 4769 info->stream = *stream;
4627 return *stream; 4770 return *stream;
4628 } 4771 }
4629 4772
4630 4773
4631 } // namespace google_breakpad 4774 } // namespace google_breakpad
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