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Code Issues Releases Wiki Activity

* Updated breakpad to latest version.

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This commit is contained in:
Christian Muehlhaeuser
2012-06-24 18:25:34 +02:00
parent ffd2cee2ff
commit 6aae2dd96f
186 changed files with 9184 additions and 5835 deletions
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190
thirdparty/breakpad/client/linux/minidump_writer/minidump_writer.cc vendored
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@@ -46,26 +46,24 @@
#include "client/linux/minidump_writer/minidump_writer.h"
#include "client/minidump_file_writer-inl.h"
#include <ctype.h>
#include <errno.h>
#include <fcntl.h>
#if !defined(__ANDROID__)
#include <link.h>
#endif
#include <stdio.h>
#include <unistd.h>
#include <ctype.h>
#if !defined(__ANDROID__)
#include <sys/ucontext.h>
#include <sys/user.h>
#endif
#include <sys/utsname.h>
#include <unistd.h>
#include <algorithm>
#include "client/minidump_file_writer.h"
#include "google_breakpad/common/minidump_format.h"
#include "google_breakpad/common/minidump_cpu_amd64.h"
#include "google_breakpad/common/minidump_cpu_x86.h"
#if defined(__ANDROID__)
#include "client/linux/android_link.h"
@@ -74,8 +72,11 @@
#include "client/linux/handler/exception_handler.h"
#include "client/linux/minidump_writer/line_reader.h"
#include "client/linux/minidump_writer/linux_dumper.h"
#include "client/linux/minidump_writer/linux_ptrace_dumper.h"
#include "client/linux/minidump_writer/minidump_extension_linux.h"
#include "client/minidump_file_writer.h"
#include "common/linux/linux_libc_support.h"
#include "google_breakpad/common/minidump_format.h"
#include "third_party/lss/linux_syscall_support.h"
// Minidump defines register structures which are different from the raw
@@ -368,32 +369,30 @@ namespace google_breakpad {
class MinidumpWriter {
public:
MinidumpWriter(const char* filename,
pid_t crashing_pid,
const ExceptionHandler::CrashContext* context,
const MappingList& mappings)
const MappingList& mappings,
LinuxDumper* dumper)
: filename_(filename),
siginfo_(&context->siginfo),
ucontext_(&context->context),
ucontext_(context ? &context->context : NULL),
#if !defined(__ARM_EABI__)
float_state_(&context->float_state),
float_state_(context ? &context->float_state : NULL),
#else
// TODO: fix this after fixing ExceptionHandler
float_state_(NULL),
#endif
crashing_tid_(context->tid),
dumper_(crashing_pid),
memory_blocks_(dumper_.allocator()),
dumper_(dumper),
memory_blocks_(dumper_->allocator()),
mapping_list_(mappings) {
}
bool Init() {
return dumper_.Init() && minidump_writer_.Open(filename_) &&
dumper_.ThreadsSuspend();
return dumper_->Init() && minidump_writer_.Open(filename_) &&
dumper_->ThreadsSuspend();
}
~MinidumpWriter() {
minidump_writer_.Close();
dumper_.ThreadsResume();
dumper_->ThreadsResume();
}
bool Dump() {
@@ -403,17 +402,25 @@ class MinidumpWriter {
struct r_debug* r_debug = NULL;
uint32_t dynamic_length = 0;
#if !defined(__ANDROID__)
// The Android NDK is missing structure definitions for most of this.
// For now, it's simpler just to skip it.
for (int i = 0;;) {
ElfW(Dyn) dyn;
dynamic_length += sizeof(dyn);
dumper_.CopyFromProcess(&dyn, crashing_tid_, _DYNAMIC+i++, sizeof(dyn));
if (dyn.d_tag == DT_DEBUG) {
r_debug = (struct r_debug*)dyn.d_un.d_ptr;
continue;
} else if (dyn.d_tag == DT_NULL) {
break;
// This code assumes the crashing process is the same as this process and
// may hang or take a long time to complete if not so.
// Thus, we skip this code for a post-mortem based dump.
if (!dumper_->IsPostMortem()) {
// The Android NDK is missing structure definitions for most of this.
// For now, it's simpler just to skip it.
for (int i = 0;;) {
ElfW(Dyn) dyn;
dynamic_length += sizeof(dyn);
// NOTE: Use of _DYNAMIC assumes this is the same process as the
// crashing process. This loop will go forever if it's out of bounds.
dumper_->CopyFromProcess(&dyn, GetCrashThread(), _DYNAMIC+i++,
sizeof(dyn));
if (dyn.d_tag == DT_DEBUG) {
r_debug = (struct r_debug*)dyn.d_un.d_ptr;
continue;
} else if (dyn.d_tag == DT_NULL) {
break;
}
}
}
#endif
@@ -467,7 +474,7 @@ class MinidumpWriter {
dir.CopyIndex(dir_index++, &dirent);
dirent.stream_type = MD_LINUX_PROC_STATUS;
if (!WriteProcFile(&dirent.location, crashing_tid_, "status"))
if (!WriteProcFile(&dirent.location, GetCrashThread(), "status"))
NullifyDirectoryEntry(&dirent);
dir.CopyIndex(dir_index++, &dirent);
@@ -477,22 +484,22 @@ class MinidumpWriter {
dir.CopyIndex(dir_index++, &dirent);
dirent.stream_type = MD_LINUX_CMD_LINE;
if (!WriteProcFile(&dirent.location, crashing_tid_, "cmdline"))
if (!WriteProcFile(&dirent.location, GetCrashThread(), "cmdline"))
NullifyDirectoryEntry(&dirent);
dir.CopyIndex(dir_index++, &dirent);
dirent.stream_type = MD_LINUX_ENVIRON;
if (!WriteProcFile(&dirent.location, crashing_tid_, "environ"))
if (!WriteProcFile(&dirent.location, GetCrashThread(), "environ"))
NullifyDirectoryEntry(&dirent);
dir.CopyIndex(dir_index++, &dirent);
dirent.stream_type = MD_LINUX_AUXV;
if (!WriteProcFile(&dirent.location, crashing_tid_, "auxv"))
if (!WriteProcFile(&dirent.location, GetCrashThread(), "auxv"))
NullifyDirectoryEntry(&dirent);
dir.CopyIndex(dir_index++, &dirent);
dirent.stream_type = MD_LINUX_MAPS;
if (!WriteProcFile(&dirent.location, crashing_tid_, "maps"))
if (!WriteProcFile(&dirent.location, GetCrashThread(), "maps"))
NullifyDirectoryEntry(&dirent);
dir.CopyIndex(dir_index++, &dirent);
@@ -506,7 +513,7 @@ class MinidumpWriter {
// If you add more directory entries, don't forget to update kNumWriters,
// above.
dumper_.ThreadsResume();
dumper_->ThreadsResume();
return true;
}
@@ -629,7 +636,7 @@ class MinidumpWriter {
// Write information about the threads.
bool WriteThreadListStream(MDRawDirectory* dirent) {
const unsigned num_threads = dumper_.threads().size();
const unsigned num_threads = dumper_->threads().size();
TypedMDRVA<uint32_t> list(&minidump_writer_);
if (!list.AllocateObjectAndArray(num_threads, sizeof(MDRawThread)))
@@ -643,21 +650,23 @@ class MinidumpWriter {
for (unsigned i = 0; i < num_threads; ++i) {
MDRawThread thread;
my_memset(&thread, 0, sizeof(thread));
thread.thread_id = dumper_.threads()[i];
thread.thread_id = dumper_->threads()[i];
// We have a different source of information for the crashing thread. If
// we used the actual state of the thread we would find it running in the
// signal handler with the alternative stack, which would be deeply
// unhelpful.
if ((pid_t)thread.thread_id == crashing_tid_) {
if (static_cast<pid_t>(thread.thread_id) == GetCrashThread() &&
!dumper_->IsPostMortem()) {
const void* stack;
size_t stack_len;
if (!dumper_.GetStackInfo(&stack, &stack_len, GetStackPointer()))
if (!dumper_->GetStackInfo(&stack, &stack_len, GetStackPointer()))
return false;
UntypedMDRVA memory(&minidump_writer_);
if (!memory.Allocate(stack_len))
return false;
uint8_t* stack_copy = (uint8_t*) dumper_.allocator()->Alloc(stack_len);
dumper_.CopyFromProcess(stack_copy, thread.thread_id, stack, stack_len);
uint8_t* stack_copy = reinterpret_cast<uint8_t*>(Alloc(stack_len));
dumper_->CopyFromProcess(stack_copy, thread.thread_id, stack,
stack_len);
memory.Copy(stack_copy, stack_len);
thread.stack.start_of_memory_range = (uintptr_t) (stack);
thread.stack.memory = memory.location();
@@ -671,8 +680,8 @@ class MinidumpWriter {
// don't bother trying to write it.
bool ip_is_mapped = false;
MDMemoryDescriptor ip_memory_d;
for (unsigned i = 0; i < dumper_.mappings().size(); ++i) {
const MappingInfo& mapping = *dumper_.mappings()[i];
for (unsigned j = 0; j < dumper_->mappings().size(); ++j) {
const MappingInfo& mapping = *dumper_->mappings()[j];
if (ip >= mapping.start_addr &&
ip < mapping.start_addr + mapping.size) {
ip_is_mapped = true;
@@ -695,12 +704,12 @@ class MinidumpWriter {
if (!ip_memory.Allocate(ip_memory_d.memory.data_size))
return false;
uint8_t* memory_copy =
(uint8_t*) dumper_.allocator()->Alloc(ip_memory_d.memory.data_size);
dumper_.CopyFromProcess(
memory_copy,
thread.thread_id,
reinterpret_cast<void*>(ip_memory_d.start_of_memory_range),
ip_memory_d.memory.data_size);
reinterpret_cast<uint8_t*>(Alloc(ip_memory_d.memory.data_size));
dumper_->CopyFromProcess(
memory_copy,
thread.thread_id,
reinterpret_cast<void*>(ip_memory_d.start_of_memory_range),
ip_memory_d.memory.data_size);
ip_memory.Copy(memory_copy, ip_memory_d.memory.data_size);
ip_memory_d.memory = ip_memory.location();
memory_blocks_.push_back(ip_memory_d);
@@ -716,15 +725,14 @@ class MinidumpWriter {
crashing_thread_context_ = cpu.location();
} else {
ThreadInfo info;
if (!dumper_.ThreadInfoGet(dumper_.threads()[i], &info))
if (!dumper_->GetThreadInfoByIndex(i, &info))
return false;
UntypedMDRVA memory(&minidump_writer_);
if (!memory.Allocate(info.stack_len))
return false;
uint8_t* stack_copy =
(uint8_t*) dumper_.allocator()->Alloc(info.stack_len);
dumper_.CopyFromProcess(stack_copy, thread.thread_id, info.stack,
info.stack_len);
uint8_t* stack_copy = reinterpret_cast<uint8_t*>(Alloc(info.stack_len));
dumper_->CopyFromProcess(stack_copy, thread.thread_id, info.stack,
info.stack_len);
memory.Copy(stack_copy, info.stack_len);
thread.stack.start_of_memory_range = (uintptr_t)(info.stack);
thread.stack.memory = memory.location();
@@ -737,6 +745,10 @@ class MinidumpWriter {
CPUFillFromThreadInfo(cpu.get(), info);
PopSeccompStackFrame(cpu.get(), thread, stack_copy);
thread.thread_context = cpu.location();
if (dumper_->threads()[i] == GetCrashThread()) {
assert(dumper_->IsPostMortem());
crashing_thread_context_ = cpu.location();
}
}
list.CopyIndexAfterObject(i, &thread, sizeof(thread));
@@ -777,11 +789,11 @@ class MinidumpWriter {
// Because of this, we also include the full, unparsed, /proc/$x/maps file in
// another stream in the file.
bool WriteMappings(MDRawDirectory* dirent) {
const unsigned num_mappings = dumper_.mappings().size();
const unsigned num_mappings = dumper_->mappings().size();
unsigned num_output_mappings = mapping_list_.size();
for (unsigned i = 0; i < dumper_.mappings().size(); ++i) {
const MappingInfo& mapping = *dumper_.mappings()[i];
for (unsigned i = 0; i < dumper_->mappings().size(); ++i) {
const MappingInfo& mapping = *dumper_->mappings()[i];
if (ShouldIncludeMapping(mapping) && !HaveMappingInfo(mapping))
num_output_mappings++;
}
@@ -797,7 +809,7 @@ class MinidumpWriter {
// First write all the mappings from the dumper
unsigned int j = 0;
for (unsigned i = 0; i < num_mappings; ++i) {
const MappingInfo& mapping = *dumper_.mappings()[i];
const MappingInfo& mapping = *dumper_->mappings()[i];
if (!ShouldIncludeMapping(mapping) || HaveMappingInfo(mapping))
continue;
@@ -859,8 +871,8 @@ class MinidumpWriter {
// GUID was provided by caller.
memcpy(signature, identifier, sizeof(MDGUID));
} else {
dumper_.ElfFileIdentifierForMapping(mapping, member,
mapping_id, signature);
dumper_->ElfFileIdentifierForMapping(mapping, member,
mapping_id, signature);
}
my_memset(cv_ptr, 0, sizeof(uint32_t)); // Set age to 0 on Linux.
cv_ptr += sizeof(uint32_t);
@@ -905,10 +917,9 @@ class MinidumpWriter {
dirent->stream_type = MD_EXCEPTION_STREAM;
dirent->location = exc.location();
exc.get()->thread_id = crashing_tid_;
exc.get()->exception_record.exception_code = siginfo_->si_signo;
exc.get()->exception_record.exception_address =
(uintptr_t) siginfo_->si_addr;
exc.get()->thread_id = GetCrashThread();
exc.get()->exception_record.exception_code = dumper_->crash_signal();
exc.get()->exception_record.exception_address = dumper_->crash_address();
exc.get()->thread_context = crashing_thread_context_;
return true;
@@ -945,11 +956,11 @@ class MinidumpWriter {
// Count the number of loaded DSOs
int dso_count = 0;
struct r_debug debug_entry;
dumper_.CopyFromProcess(&debug_entry, crashing_tid_, r_debug,
sizeof(debug_entry));
dumper_->CopyFromProcess(&debug_entry, GetCrashThread(), r_debug,
sizeof(debug_entry));
for (struct link_map* ptr = debug_entry.r_map; ptr; ) {
struct link_map map;
dumper_.CopyFromProcess(&map, crashing_tid_, ptr, sizeof(map));
dumper_->CopyFromProcess(&map, GetCrashThread(), ptr, sizeof(map));
ptr = map.l_next;
dso_count++;
}
@@ -967,12 +978,12 @@ class MinidumpWriter {
// Iterate over DSOs and write their information to mini dump
for (struct link_map* ptr = debug_entry.r_map; ptr; ) {
struct link_map map;
dumper_.CopyFromProcess(&map, crashing_tid_, ptr, sizeof(map));
dumper_->CopyFromProcess(&map, GetCrashThread(), ptr, sizeof(map));
ptr = map.l_next;
char filename[257] = { 0 };
if (map.l_name) {
dumper_.CopyFromProcess(filename, crashing_tid_, map.l_name,
sizeof(filename) - 1);
dumper_->CopyFromProcess(filename, GetCrashThread(), map.l_name,
sizeof(filename) - 1);
}
MDLocationDescriptor location;
if (!minidump_writer_.WriteString(filename, 0, &location))
@@ -1001,8 +1012,8 @@ class MinidumpWriter {
debug.get()->dynamic = (void*)&_DYNAMIC;
char *dso_debug_data = new char[dynamic_length];
dumper_.CopyFromProcess(dso_debug_data, crashing_tid_, &_DYNAMIC,
dynamic_length);
dumper_->CopyFromProcess(dso_debug_data, GetCrashThread(), &_DYNAMIC,
dynamic_length);
debug.CopyIndexAfterObject(0, dso_debug_data, dynamic_length);
delete[] dso_debug_data;
@@ -1011,6 +1022,14 @@ class MinidumpWriter {
}
private:
void* Alloc(unsigned bytes) {
return dumper_->allocator()->Alloc(bytes);
}
pid_t GetCrashThread() const {
return dumper_->crash_thread();
}
#if defined(__i386)
uintptr_t GetStackPointer() {
return ucontext_->uc_mcontext.gregs[REG_ESP];
@@ -1175,16 +1194,15 @@ class MinidumpWriter {
// to read as much as we can into a buffer.
static const unsigned kBufSize = 1024 - 2*sizeof(void*);
struct Buffers {
struct Buffers* next;
Buffers* next;
size_t len;
uint8_t data[kBufSize];
} *buffers =
(struct Buffers*) dumper_.allocator()->Alloc(sizeof(struct Buffers));
} *buffers = reinterpret_cast<Buffers*>(Alloc(sizeof(Buffers)));
buffers->next = NULL;
buffers->len = 0;
size_t total = 0;
for (struct Buffers* bufptr = buffers;;) {
for (Buffers* bufptr = buffers;;) {
ssize_t r;
do {
r = sys_read(fd, &bufptr->data[bufptr->len], kBufSize - bufptr->len);
@@ -1196,8 +1214,7 @@ class MinidumpWriter {
total += r;
bufptr->len += r;
if (bufptr->len == kBufSize) {
bufptr->next =
(struct Buffers*) dumper_.allocator()->Alloc(sizeof(struct Buffers));
bufptr->next = reinterpret_cast<Buffers*>(Alloc(sizeof(Buffers)));
bufptr = bufptr->next;
bufptr->next = NULL;
bufptr->len = 0;
@@ -1277,16 +1294,15 @@ class MinidumpWriter {
bool WriteProcFile(MDLocationDescriptor* result, pid_t pid,
const char* filename) {
char buf[NAME_MAX];
dumper_.BuildProcPath(buf, pid, filename);
if (!dumper_->BuildProcPath(buf, pid, filename))
return false;
return WriteFile(result, buf);
}
const char* const filename_; // output filename
const siginfo_t* const siginfo_; // from the signal handler (see sigaction)
const struct ucontext* const ucontext_; // also from the signal handler
const struct _libc_fpstate* const float_state_; // ditto
const pid_t crashing_tid_; // the process which actually crashed
LinuxDumper dumper_;
LinuxDumper* dumper_;
MinidumpFileWriter minidump_writer_;
MDLocationDescriptor crashing_thread_context_;
// Blocks of memory written to the dump. These are all currently
@@ -1310,7 +1326,21 @@ bool WriteMinidump(const char* filename, pid_t crashing_process,
return false;
const ExceptionHandler::CrashContext* context =
reinterpret_cast<const ExceptionHandler::CrashContext*>(blob);
MinidumpWriter writer(filename, crashing_process, context, mappings);
LinuxPtraceDumper dumper(crashing_process);
dumper.set_crash_address(
reinterpret_cast<uintptr_t>(context->siginfo.si_addr));
dumper.set_crash_signal(context->siginfo.si_signo);
dumper.set_crash_thread(context->tid);
MinidumpWriter writer(filename, context, mappings, &dumper);
if (!writer.Init())
return false;
return writer.Dump();
}
bool WriteMinidump(const char* filename,
const MappingList& mappings,
LinuxDumper* dumper) {
MinidumpWriter writer(filename, NULL, mappings, dumper);
if (!writer.Init())
return false;
return writer.Dump();