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linux: Implement crash reporter.

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This commit is contained in:
Cheng Zhao 2014-02-26 20:39:20 +08:00
parent 2f088c5caa
commit 4a3341e31e
5 changed files with 927 additions and 8 deletions
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9
atom.gyp
View file

@ -170,6 +170,8 @@
'common/crash_reporter/crash_reporter_mac.mm', 'common/crash_reporter/crash_reporter_mac.mm',
'common/crash_reporter/crash_reporter_win.cc', 'common/crash_reporter/crash_reporter_win.cc',
'common/crash_reporter/crash_reporter_win.h', 'common/crash_reporter/crash_reporter_win.h',
'common/crash_reporter/linux/crash_dump_handler.cc',
'common/crash_reporter/linux/crash_dump_handler.h',
'common/crash_reporter/win/crash_service.cc', 'common/crash_reporter/win/crash_service.cc',
'common/crash_reporter/win/crash_service.h', 'common/crash_reporter/win/crash_service.h',
'common/crash_reporter/win/crash_service_main.cc', 'common/crash_reporter/win/crash_service_main.cc',
@ -411,6 +413,13 @@
'-rdynamic', '-rdynamic',
], ],
}, },
# Required settings of using breakpad.
'include_dirs': [
'vendor/breakpad/src',
],
'cflags': [
'-Wno-empty-body',
],
'dependencies': [ 'dependencies': [
'vendor/breakpad/breakpad.gyp:breakpad_client', 'vendor/breakpad/breakpad.gyp:breakpad_client',
], ],

170
common/crash_reporter/crash_reporter_linux.cc
View file

@ -1,28 +1,186 @@
// Copyright (c) 2013 GitHub, Inc. All rights reserved. // Copyright (c) 2014 GitHub, Inc. All rights reserved.
// Copyright (c) 2013 The Chromium Authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be // Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file. // found in the LICENSE file.
#include "common/crash_reporter/crash_reporter_linux.h" #include "common/crash_reporter/crash_reporter_linux.h"
// #include <fcntl.h>
// #include <poll.h>
// #include <signal.h>
// #include <stdlib.h>
// #include <sys/socket.h>
#include <sys/time.h>
// #include <sys/types.h>
// #include <sys/uio.h>
// #include <sys/wait.h>
// #include <time.h>
#include <unistd.h>
#include "base/debug/crash_logging.h"
#include "base/files/file_path.h"
#include "base/linux_util.h"
#include "base/logging.h"
#include "base/path_service.h"
// #include "base/platform_file.h"
// #include "base/posix/global_descriptors.h"
#include "base/process/memory.h"
#include "base/memory/singleton.h" #include "base/memory/singleton.h"
// #include "base/strings/string_util.h"
#include "common/crash_reporter/linux/crash_dump_handler.h"
// #include "content/public/common/content_descriptors.h"
#include "vendor/breakpad/src/client/linux/handler/exception_handler.h"
#include "vendor/breakpad/src/common/linux/linux_libc_support.h"
using google_breakpad::ExceptionHandler;
using google_breakpad::MinidumpDescriptor;
namespace crash_reporter { namespace crash_reporter {
namespace {
static const size_t kDistroSize = 128;
// Define a preferred limit on minidump sizes, because Crash Server currently
// throws away any larger than 1.2MB (1.2 * 1024 * 1024). A value of -1 means
// no limit.
static const off_t kMaxMinidumpFileSize = 1258291;
uint64_t g_process_start_time = 0;
pid_t g_pid = 0;
ExceptionHandler* g_breakpad = NULL;
CrashKeyStorage* g_crash_keys = NULL;
// The following helper functions are for calculating uptime.
// Converts a struct timeval to milliseconds.
uint64_t timeval_to_ms(struct timeval *tv) {
uint64_t ret = tv->tv_sec; // Avoid overflow by explicitly using a uint64_t.
ret *= 1000;
ret += tv->tv_usec / 1000;
return ret;
}
void SetProcessStartTime() {
// Set the base process start time value.
struct timeval tv;
if (!gettimeofday(&tv, NULL))
g_process_start_time = timeval_to_ms(&tv);
else
g_process_start_time = 0;
}
// Populates the passed in allocated string and its size with the distro of
// the crashing process.
// The passed string is expected to be at least kDistroSize bytes long.
void PopulateDistro(char* distro, size_t* distro_len_param) {
size_t distro_len = std::min(my_strlen(base::g_linux_distro), kDistroSize);
memcpy(distro, base::g_linux_distro, distro_len);
if (distro_len_param)
*distro_len_param = distro_len;
}
bool CrashDone(const MinidumpDescriptor& minidump,
void* context,
const bool succeeded) {
// WARNING: this code runs in a compromised context. It may not call into
// libc nor allocate memory normally.
if (!succeeded) {
const char msg[] = "Failed to generate minidump.";
WriteLog(msg, sizeof(msg) - 1);
return false;
}
DCHECK(!minidump.IsFD());
BreakpadInfo info = {0};
info.filename = minidump.path();
info.fd = minidump.fd();
#if defined(ADDRESS_SANITIZER)
google_breakpad::PageAllocator allocator;
const size_t log_path_len = my_strlen(minidump.path());
char* log_path = reinterpret_cast<char*>(allocator.Alloc(log_path_len + 1));
my_memcpy(log_path, minidump.path(), log_path_len);
my_memcpy(log_path + log_path_len - 4, ".log", 4);
log_path[log_path_len] = '\0';
info.log_filename = log_path;
#endif
// TODO(zcbenz): Set the correct process_type here.
info.process_type = "browser";
info.process_type_length = 7;
info.distro = base::g_linux_distro;
info.distro_length = my_strlen(base::g_linux_distro);
info.upload = true;
info.process_start_time = g_process_start_time;
info.oom_size = base::g_oom_size;
info.pid = g_pid;
info.crash_keys = g_crash_keys;
HandleCrashDump(info);
return true;
}
#if defined(ADDRESS_SANITIZER)
extern "C"
void __asan_set_error_report_callback(void (*cb)(const char*));
extern "C"
void AsanLinuxBreakpadCallback(const char* report) {
// Send minidump here.
g_breakpad->SimulateSignalDelivery(SIGKILL);
}
#endif
} // namespace
CrashReporterLinux::CrashReporterLinux() { CrashReporterLinux::CrashReporterLinux() {
SetProcessStartTime();
g_pid = getpid();
// Make base::g_linux_distro work.
base::SetLinuxDistro(base::GetLinuxDistro());
} }
CrashReporterLinux::~CrashReporterLinux() { CrashReporterLinux::~CrashReporterLinux() {
} }
void CrashReporterLinux::InitBreakpad(const std::string& product_name, void CrashReporterLinux::InitBreakpad(const std::string& product_name,
const std::string& version, const std::string& version,
const std::string& company_name, const std::string& company_name,
const std::string& submit_url, const std::string& submit_url,
bool auto_submit, bool auto_submit,
bool skip_system_crash_handler) { bool skip_system_crash_handler) {
EnableCrashDumping();
#if defined(ADDRESS_SANITIZER)
// Register the callback for AddressSanitizer error reporting.
__asan_set_error_report_callback(AsanLinuxBreakpadCallback);
#endif
} }
void CrashReporterLinux::SetUploadParameters() { void CrashReporterLinux::SetUploadParameters() {
upload_parameters_["platform"] = "linux";
// TODO(zcbenz): Convert upload parameters to crash keys here.
g_crash_keys = new CrashKeyStorage;
}
void CrashReporterLinux::EnableCrashDumping() {
base::FilePath tmp_path("/tmp");
PathService::Get(base::DIR_TEMP, &tmp_path);
base::FilePath dumps_path(tmp_path);
DCHECK(!g_breakpad);
MinidumpDescriptor minidump_descriptor(dumps_path.value());
minidump_descriptor.set_size_limit(kMaxMinidumpFileSize);
g_breakpad = new ExceptionHandler(
minidump_descriptor,
NULL,
CrashDone,
this,
true, // Install handlers.
-1); // Server file descriptor. -1 for in-process.
} }
// static // static

5
common/crash_reporter/crash_reporter_linux.h
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@ -1,4 +1,4 @@
// Copyright (c) 2013 GitHub, Inc. All rights reserved. // Copyright (c) 2014 GitHub, Inc. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be // Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file. // found in the LICENSE file.
@ -30,9 +30,10 @@ class CrashReporterLinux : public CrashReporter {
CrashReporterLinux(); CrashReporterLinux();
virtual ~CrashReporterLinux(); virtual ~CrashReporterLinux();
void EnableCrashDumping();
DISALLOW_COPY_AND_ASSIGN(CrashReporterLinux); DISALLOW_COPY_AND_ASSIGN(CrashReporterLinux);
}; };
} // namespace crash_reporter } // namespace crash_reporter
#endif // ATOM_COMMON_CRASH_REPORTER_CRASH_REPORTER_LINUX_H_ #endif // ATOM_COMMON_CRASH_REPORTER_CRASH_REPORTER_LINUX_H_

707
common/crash_reporter/linux/crash_dump_handler.cc Normal file
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@ -0,0 +1,707 @@
// Copyright (c) 2014 GitHub, Inc. All rights reserved.
// Copyright (c) 2013 The Chromium Authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
// For linux_syscall_support.h. This makes it safe to call embedded system
// calls when in seccomp mode.
#include "common/crash_reporter/linux/crash_dump_handler.h"
#include <poll.h>
#include <algorithm>
#include "base/posix/eintr_wrapper.h"
#include "vendor/breakpad/src/client/linux/minidump_writer/directory_reader.h"
#include "vendor/breakpad/src/common/linux/linux_libc_support.h"
#include "vendor/breakpad/src/common/memory.h"
#include "third_party/lss/linux_syscall_support.h"
#define STAT_STRUCT struct kernel_stat
#define FSTAT_FUNC sys_fstat
// Some versions of gcc are prone to warn about unused return values. In cases
// where we either a) know the call cannot fail, or b) there is nothing we
// can do when a call fails, we mark the return code as ignored. This avoids
// spurious compiler warnings.
#define IGNORE_RET(x) do { if (x); } while (0)
namespace crash_reporter {
namespace {
const char kUploadURL[] = "https://clients2.google.com/cr/report";
// String buffer size to use to convert a uint64_t to string.
const size_t kUint64StringSize = 21;
// Writes the value |v| as 16 hex characters to the memory pointed at by
// |output|.
void write_uint64_hex(char* output, uint64_t v) {
static const char hextable[] = "0123456789abcdef";
for (int i = 15; i >= 0; --i) {
output[i] = hextable[v & 15];
v >>= 4;
}
}
// uint64_t version of my_int_len() from
// breakpad/src/common/linux/linux_libc_support.h. Return the length of the
// given, non-negative integer when expressed in base 10.
unsigned my_uint64_len(uint64_t i) {
if (!i)
return 1;
unsigned len = 0;
while (i) {
len++;
i /= 10;
}
return len;
}
// uint64_t version of my_uitos() from
// breakpad/src/common/linux/linux_libc_support.h. Convert a non-negative
// integer to a string (not null-terminated).
void my_uint64tos(char* output, uint64_t i, unsigned i_len) {
for (unsigned index = i_len; index; --index, i /= 10)
output[index - 1] = '0' + (i % 10);
}
// Converts a struct timeval to milliseconds.
uint64_t kernel_timeval_to_ms(struct kernel_timeval *tv) {
uint64_t ret = tv->tv_sec; // Avoid overflow by explicitly using a uint64_t.
ret *= 1000;
ret += tv->tv_usec / 1000;
return ret;
}
size_t LengthWithoutTrailingSpaces(const char* str, size_t len) {
while (len > 0 && str[len - 1] == ' ') {
len--;
}
return len;
}
// MIME substrings.
const char g_rn[] = "\r\n";
const char g_form_data_msg[] = "Content-Disposition: form-data; name=\"";
const char g_quote_msg[] = "\"";
const char g_dashdash_msg[] = "--";
const char g_dump_msg[] = "upload_file_minidump\"; filename=\"dump\"";
#if defined(ADDRESS_SANITIZER)
const char g_log_msg[] = "upload_file_log\"; filename=\"log\"";
#endif
const char g_content_type_msg[] = "Content-Type: application/octet-stream";
// MimeWriter manages an iovec for writing MIMEs to a file.
class MimeWriter {
public:
static const int kIovCapacity = 30;
static const size_t kMaxCrashChunkSize = 64;
MimeWriter(int fd, const char* const mime_boundary);
~MimeWriter();
// Append boundary.
virtual void AddBoundary();
// Append end of file boundary.
virtual void AddEnd();
// Append key/value pair with specified sizes.
virtual void AddPairData(const char* msg_type,
size_t msg_type_size,
const char* msg_data,
size_t msg_data_size);
// Append key/value pair.
void AddPairString(const char* msg_type,
const char* msg_data) {
AddPairData(msg_type, my_strlen(msg_type), msg_data, my_strlen(msg_data));
}
// Append key/value pair, splitting value into chunks no larger than
// |chunk_size|. |chunk_size| cannot be greater than |kMaxCrashChunkSize|.
// The msg_type string will have a counter suffix to distinguish each chunk.
virtual void AddPairDataInChunks(const char* msg_type,
size_t msg_type_size,
const char* msg_data,
size_t msg_data_size,
size_t chunk_size,
bool strip_trailing_spaces);
// Add binary file contents to be uploaded with the specified filename.
virtual void AddFileContents(const char* filename_msg,
uint8_t* file_data,
size_t file_size);
// Flush any pending iovecs to the output file.
void Flush() {
IGNORE_RET(sys_writev(fd_, iov_, iov_index_));
iov_index_ = 0;
}
protected:
void AddItem(const void* base, size_t size);
// Minor performance trade-off for easier-to-maintain code.
void AddString(const char* str) {
AddItem(str, my_strlen(str));
}
void AddItemWithoutTrailingSpaces(const void* base, size_t size);
struct kernel_iovec iov_[kIovCapacity];
int iov_index_;
// Output file descriptor.
int fd_;
const char* const mime_boundary_;
DISALLOW_COPY_AND_ASSIGN(MimeWriter);
};
MimeWriter::MimeWriter(int fd, const char* const mime_boundary)
: iov_index_(0),
fd_(fd),
mime_boundary_(mime_boundary) {
}
MimeWriter::~MimeWriter() {
}
void MimeWriter::AddBoundary() {
AddString(mime_boundary_);
AddString(g_rn);
}
void MimeWriter::AddEnd() {
AddString(mime_boundary_);
AddString(g_dashdash_msg);
AddString(g_rn);
}
void MimeWriter::AddPairData(const char* msg_type,
size_t msg_type_size,
const char* msg_data,
size_t msg_data_size) {
AddString(g_form_data_msg);
AddItem(msg_type, msg_type_size);
AddString(g_quote_msg);
AddString(g_rn);
AddString(g_rn);
AddItem(msg_data, msg_data_size);
AddString(g_rn);
}
void MimeWriter::AddPairDataInChunks(const char* msg_type,
size_t msg_type_size,
const char* msg_data,
size_t msg_data_size,
size_t chunk_size,
bool strip_trailing_spaces) {
if (chunk_size > kMaxCrashChunkSize)
return;
unsigned i = 0;
size_t done = 0, msg_length = msg_data_size;
while (msg_length) {
char num[kUint64StringSize];
const unsigned num_len = my_uint_len(++i);
my_uitos(num, i, num_len);
size_t chunk_len = std::min(chunk_size, msg_length);
AddString(g_form_data_msg);
AddItem(msg_type, msg_type_size);
AddItem(num, num_len);
AddString(g_quote_msg);
AddString(g_rn);
AddString(g_rn);
if (strip_trailing_spaces) {
AddItemWithoutTrailingSpaces(msg_data + done, chunk_len);
} else {
AddItem(msg_data + done, chunk_len);
}
AddString(g_rn);
AddBoundary();
Flush();
done += chunk_len;
msg_length -= chunk_len;
}
}
void MimeWriter::AddFileContents(const char* filename_msg, uint8_t* file_data,
size_t file_size) {
AddString(g_form_data_msg);
AddString(filename_msg);
AddString(g_rn);
AddString(g_content_type_msg);
AddString(g_rn);
AddString(g_rn);
AddItem(file_data, file_size);
AddString(g_rn);
}
void MimeWriter::AddItem(const void* base, size_t size) {
// Check if the iovec is full and needs to be flushed to output file.
if (iov_index_ == kIovCapacity) {
Flush();
}
iov_[iov_index_].iov_base = const_cast<void*>(base);
iov_[iov_index_].iov_len = size;
++iov_index_;
}
void MimeWriter::AddItemWithoutTrailingSpaces(const void* base, size_t size) {
AddItem(base, LengthWithoutTrailingSpaces(static_cast<const char*>(base),
size));
}
void LoadDataFromFD(google_breakpad::PageAllocator& allocator,
int fd, bool close_fd, uint8_t** file_data, size_t* size) {
STAT_STRUCT st;
if (FSTAT_FUNC(fd, &st) != 0) {
static const char msg[] = "Cannot upload crash dump: stat failed\n";
WriteLog(msg, sizeof(msg) - 1);
if (close_fd)
IGNORE_RET(sys_close(fd));
return;
}
*file_data = reinterpret_cast<uint8_t*>(allocator.Alloc(st.st_size));
if (!(*file_data)) {
static const char msg[] = "Cannot upload crash dump: cannot alloc\n";
WriteLog(msg, sizeof(msg) - 1);
if (close_fd)
IGNORE_RET(sys_close(fd));
return;
}
my_memset(*file_data, 0xf, st.st_size);
*size = st.st_size;
int byte_read = sys_read(fd, *file_data, *size);
if (byte_read == -1) {
static const char msg[] = "Cannot upload crash dump: read failed\n";
WriteLog(msg, sizeof(msg) - 1);
if (close_fd)
IGNORE_RET(sys_close(fd));
return;
}
if (close_fd)
IGNORE_RET(sys_close(fd));
}
void LoadDataFromFile(google_breakpad::PageAllocator& allocator,
const char* filename,
int* fd, uint8_t** file_data, size_t* size) {
// WARNING: this code runs in a compromised context. It may not call into
// libc nor allocate memory normally.
*fd = sys_open(filename, O_RDONLY, 0);
*size = 0;
if (*fd < 0) {
static const char msg[] = "Cannot upload crash dump: failed to open\n";
WriteLog(msg, sizeof(msg) - 1);
return;
}
LoadDataFromFD(allocator, *fd, true, file_data, size);
}
// Spawn the appropriate upload process for the current OS:
// - generic Linux invokes wget.
// - ChromeOS invokes crash_reporter.
// |dumpfile| is the path to the dump data file.
// |mime_boundary| is only used on Linux.
// |exe_buf| is only used on CrOS and is the crashing process' name.
void ExecUploadProcessOrTerminate(const BreakpadInfo& info,
const char* dumpfile,
const char* mime_boundary,
const char* exe_buf,
google_breakpad::PageAllocator* allocator) {
// The --header argument to wget looks like:
// --header=Content-Type: multipart/form-data; boundary=XYZ
// where the boundary has two fewer leading '-' chars
static const char header_msg[] =
"--header=Content-Type: multipart/form-data; boundary=";
char* const header = reinterpret_cast<char*>(allocator->Alloc(
sizeof(header_msg) - 1 + strlen(mime_boundary) - 2 + 1));
memcpy(header, header_msg, sizeof(header_msg) - 1);
memcpy(header + sizeof(header_msg) - 1, mime_boundary + 2,
strlen(mime_boundary) - 2);
// We grab the NUL byte from the end of |mime_boundary|.
// The --post-file argument to wget looks like:
// --post-file=/tmp/...
static const char post_file_msg[] = "--post-file=";
char* const post_file = reinterpret_cast<char*>(allocator->Alloc(
sizeof(post_file_msg) - 1 + strlen(dumpfile) + 1));
memcpy(post_file, post_file_msg, sizeof(post_file_msg) - 1);
memcpy(post_file + sizeof(post_file_msg) - 1, dumpfile, strlen(dumpfile));
static const char kWgetBinary[] = "/usr/bin/wget";
const char* args[] = {
kWgetBinary,
header,
post_file,
// TODO(zcbenz): Enabling custom upload url.
kUploadURL,
"--timeout=10", // Set a timeout so we don't hang forever.
"--tries=1", // Don't retry if the upload fails.
"-O", // output reply to fd 3
"/dev/fd/3",
NULL,
};
static const char msg[] = "Cannot upload crash dump: cannot exec "
"/usr/bin/wget\n";
execve(args[0], const_cast<char**>(args), environ);
WriteLog(msg, sizeof(msg) - 1);
sys__exit(1);
}
} // namespace
void HandleCrashDump(const BreakpadInfo& info) {
int dumpfd;
bool keep_fd = false;
size_t dump_size;
uint8_t* dump_data;
google_breakpad::PageAllocator allocator;
const char* exe_buf = NULL;
if (info.fd != -1) {
// Dump is provided with an open FD.
keep_fd = true;
dumpfd = info.fd;
// The FD is pointing to the end of the file.
// Rewind, we'll read the data next.
if (lseek(dumpfd, 0, SEEK_SET) == -1) {
static const char msg[] = "Cannot upload crash dump: failed to "
"reposition minidump FD\n";
WriteLog(msg, sizeof(msg) - 1);
IGNORE_RET(sys_close(dumpfd));
return;
}
LoadDataFromFD(allocator, info.fd, false, &dump_data, &dump_size);
} else {
// Dump is provided with a path.
keep_fd = false;
LoadDataFromFile(allocator, info.filename, &dumpfd, &dump_data, &dump_size);
}
// TODO(jcivelli): make log work when using FDs.
#if defined(ADDRESS_SANITIZER)
int logfd;
size_t log_size;
uint8_t* log_data;
// Load the AddressSanitizer log into log_data.
LoadDataFromFile(allocator, info.log_filename, &logfd, &log_data, &log_size);
#endif
// We need to build a MIME block for uploading to the server. Since we are
// going to fork and run wget, it needs to be written to a temp file.
const int ufd = sys_open("/dev/urandom", O_RDONLY, 0);
if (ufd < 0) {
static const char msg[] = "Cannot upload crash dump because /dev/urandom"
" is missing\n";
WriteLog(msg, sizeof(msg) - 1);
return;
}
static const char temp_file_template[] =
"/tmp/chromium-upload-XXXXXXXXXXXXXXXX";
char temp_file[sizeof(temp_file_template)];
int temp_file_fd = -1;
if (keep_fd) {
temp_file_fd = dumpfd;
// Rewind the destination, we are going to overwrite it.
if (lseek(dumpfd, 0, SEEK_SET) == -1) {
static const char msg[] = "Cannot upload crash dump: failed to "
"reposition minidump FD (2)\n";
WriteLog(msg, sizeof(msg) - 1);
IGNORE_RET(sys_close(dumpfd));
return;
}
} else {
if (info.upload) {
memcpy(temp_file, temp_file_template, sizeof(temp_file_template));
for (unsigned i = 0; i < 10; ++i) {
uint64_t t;
sys_read(ufd, &t, sizeof(t));
write_uint64_hex(temp_file + sizeof(temp_file) - (16 + 1), t);
temp_file_fd = sys_open(temp_file, O_WRONLY | O_CREAT | O_EXCL, 0600);
if (temp_file_fd >= 0)
break;
}
if (temp_file_fd < 0) {
static const char msg[] = "Failed to create temporary file in /tmp: "
"cannot upload crash dump\n";
WriteLog(msg, sizeof(msg) - 1);
IGNORE_RET(sys_close(ufd));
return;
}
} else {
temp_file_fd = sys_open(info.filename, O_WRONLY, 0600);
if (temp_file_fd < 0) {
static const char msg[] = "Failed to save crash dump: failed to open\n";
WriteLog(msg, sizeof(msg) - 1);
IGNORE_RET(sys_close(ufd));
return;
}
}
}
// The MIME boundary is 28 hyphens, followed by a 64-bit nonce and a NUL.
char mime_boundary[28 + 16 + 1];
my_memset(mime_boundary, '-', 28);
uint64_t boundary_rand;
sys_read(ufd, &boundary_rand, sizeof(boundary_rand));
write_uint64_hex(mime_boundary + 28, boundary_rand);
mime_boundary[28 + 16] = 0;
IGNORE_RET(sys_close(ufd));
// The MIME block looks like this:
// BOUNDARY \r\n
// Content-Disposition: form-data; name="prod" \r\n \r\n
// Chrome_Linux \r\n
// BOUNDARY \r\n
// Content-Disposition: form-data; name="ver" \r\n \r\n
// 1.2.3.4 \r\n
// BOUNDARY \r\n
//
// zero or one:
// Content-Disposition: form-data; name="ptime" \r\n \r\n
// abcdef \r\n
// BOUNDARY \r\n
//
// zero or one:
// Content-Disposition: form-data; name="ptype" \r\n \r\n
// abcdef \r\n
// BOUNDARY \r\n
//
// zero or one:
// Content-Disposition: form-data; name="lsb-release" \r\n \r\n
// abcdef \r\n
// BOUNDARY \r\n
//
// zero or one:
// Content-Disposition: form-data; name="oom-size" \r\n \r\n
// 1234567890 \r\n
// BOUNDARY \r\n
//
// zero or more (up to CrashKeyStorage::num_entries = 64):
// Content-Disposition: form-data; name=crash-key-name \r\n
// crash-key-value \r\n
// BOUNDARY \r\n
//
// Content-Disposition: form-data; name="dump"; filename="dump" \r\n
// Content-Type: application/octet-stream \r\n \r\n
// <dump contents>
// \r\n BOUNDARY -- \r\n
MimeWriter writer(temp_file_fd, mime_boundary);
{
// TODO(zcbenz): Set version and product_name from JS API.
std::string product_name("Atom-Shell");
std::string version("0.1.0");
writer.AddBoundary();
writer.AddPairString("prod", product_name.c_str());
writer.AddBoundary();
writer.AddPairString("ver", version.c_str());
writer.AddBoundary();
if (info.pid > 0) {
char pid_value_buf[kUint64StringSize];
uint64_t pid_value_len = my_uint64_len(info.pid);
my_uint64tos(pid_value_buf, info.pid, pid_value_len);
static const char pid_key_name[] = "pid";
writer.AddPairData(pid_key_name, sizeof(pid_key_name) - 1,
pid_value_buf, pid_value_len);
writer.AddBoundary();
}
writer.Flush();
}
if (info.process_start_time > 0) {
struct kernel_timeval tv;
if (!sys_gettimeofday(&tv, NULL)) {
uint64_t time = kernel_timeval_to_ms(&tv);
if (time > info.process_start_time) {
time -= info.process_start_time;
char time_str[kUint64StringSize];
const unsigned time_len = my_uint64_len(time);
my_uint64tos(time_str, time, time_len);
static const char process_time_msg[] = "ptime";
writer.AddPairData(process_time_msg, sizeof(process_time_msg) - 1,
time_str, time_len);
writer.AddBoundary();
writer.Flush();
}
}
}
if (info.process_type_length) {
writer.AddPairString("ptype", info.process_type);
writer.AddBoundary();
writer.Flush();
}
if (info.distro_length) {
static const char distro_msg[] = "lsb-release";
writer.AddPairString(distro_msg, info.distro);
writer.AddBoundary();
writer.Flush();
}
if (info.oom_size) {
char oom_size_str[kUint64StringSize];
const unsigned oom_size_len = my_uint64_len(info.oom_size);
my_uint64tos(oom_size_str, info.oom_size, oom_size_len);
static const char oom_size_msg[] = "oom-size";
writer.AddPairData(oom_size_msg, sizeof(oom_size_msg) - 1,
oom_size_str, oom_size_len);
writer.AddBoundary();
writer.Flush();
}
if (info.crash_keys) {
CrashKeyStorage::Iterator crash_key_iterator(*info.crash_keys);
const CrashKeyStorage::Entry* entry;
while ((entry = crash_key_iterator.Next())) {
writer.AddPairString(entry->key, entry->value);
writer.AddBoundary();
writer.Flush();
}
}
writer.AddFileContents(g_dump_msg, dump_data, dump_size);
#if defined(ADDRESS_SANITIZER)
// Append a multipart boundary and the contents of the AddressSanitizer log.
writer.AddBoundary();
writer.AddFileContents(g_log_msg, log_data, log_size);
#endif
writer.AddEnd();
writer.Flush();
IGNORE_RET(sys_close(temp_file_fd));
if (!info.upload)
return;
const pid_t child = sys_fork();
if (!child) {
// Spawned helper process.
//
// This code is called both when a browser is crashing (in which case,
// nothing really matters any more) and when a renderer/plugin crashes, in
// which case we need to continue.
//
// Since we are a multithreaded app, if we were just to fork(), we might
// grab file descriptors which have just been created in another thread and
// hold them open for too long.
//
// Thus, we have to loop and try and close everything.
const int fd = sys_open("/proc/self/fd", O_DIRECTORY | O_RDONLY, 0);
if (fd < 0) {
for (unsigned i = 3; i < 8192; ++i)
IGNORE_RET(sys_close(i));
} else {
google_breakpad::DirectoryReader reader(fd);
const char* name;
while (reader.GetNextEntry(&name)) {
int i;
if (my_strtoui(&i, name) && i > 2 && i != fd)
IGNORE_RET(sys_close(i));
reader.PopEntry();
}
IGNORE_RET(sys_close(fd));
}
IGNORE_RET(sys_setsid());
// Leave one end of a pipe in the upload process and watch for it getting
// closed by the upload process exiting.
int fds[2];
if (sys_pipe(fds) >= 0) {
const pid_t upload_child = sys_fork();
if (!upload_child) {
// Upload process.
IGNORE_RET(sys_close(fds[0]));
IGNORE_RET(sys_dup2(fds[1], 3));
ExecUploadProcessOrTerminate(info, temp_file, mime_boundary, exe_buf,
&allocator);
}
// Helper process.
if (upload_child > 0) {
IGNORE_RET(sys_close(fds[1]));
char id_buf[17]; // Crash report IDs are expected to be 16 chars.
ssize_t len = -1;
// Upload should finish in about 10 seconds. Add a few more 500 ms
// internals to account for process startup time.
for (size_t wait_count = 0; wait_count < 24; ++wait_count) {
struct kernel_pollfd poll_fd;
poll_fd.fd = fds[0];
poll_fd.events = POLLIN | POLLPRI | POLLERR;
int ret = sys_poll(&poll_fd, 1, 500);
if (ret < 0) {
// Error
break;
} else if (ret > 0) {
// There is data to read.
len = HANDLE_EINTR(sys_read(fds[0], id_buf, sizeof(id_buf) - 1));
break;
}
// ret == 0 -> timed out, continue waiting.
}
if (len > 0) {
// Write crash dump id to stderr.
id_buf[len] = 0;
static const char msg[] = "\nCrash dump id: ";
WriteLog(msg, sizeof(msg) - 1);
WriteLog(id_buf, my_strlen(id_buf));
WriteLog("\n", 1);
}
if (sys_waitpid(upload_child, NULL, WNOHANG) == 0) {
// Upload process is still around, kill it.
sys_kill(upload_child, SIGKILL);
}
}
}
// Helper process.
IGNORE_RET(sys_unlink(info.filename));
#if defined(ADDRESS_SANITIZER)
IGNORE_RET(sys_unlink(info.log_filename));
#endif
IGNORE_RET(sys_unlink(temp_file));
sys__exit(0);
}
// Main browser process.
if (child <= 0)
return;
(void) HANDLE_EINTR(sys_waitpid(child, NULL, 0));
}
size_t WriteLog(const char* buf, size_t nbytes) {
return sys_write(2, buf, nbytes);
}
} // namespace crash_reporter

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common/crash_reporter/linux/crash_dump_handler.h Normal file
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// Copyright (c) 2014 GitHub, Inc. All rights reserved.
// Copyright (c) 2013 The Chromium Authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#ifndef ATOM_COMMON_CRASH_REPORTER_LINUX_CRASH_DUMP_HANDLER_H_
#define ATOM_COMMON_CRASH_REPORTER_LINUX_CRASH_DUMP_HANDLER_H_
#include "base/basictypes.h"
#include "vendor/breakpad/src/common/simple_string_dictionary.h"
namespace crash_reporter {
typedef google_breakpad::NonAllocatingMap<256, 256, 64> CrashKeyStorage;
// BreakpadInfo describes a crash report.
// The minidump information can either be contained in a file descriptor (fd) or
// in a file (whose path is in filename).
struct BreakpadInfo {
int fd; // File descriptor to the Breakpad dump data.
const char* filename; // Path to the Breakpad dump data.
#if defined(ADDRESS_SANITIZER)
const char* log_filename; // Path to the ASan log file.
const char* asan_report_str; // ASan report.
unsigned asan_report_length; // Length of |asan_report_length|.
#endif
const char* process_type; // Process type, e.g. "renderer".
unsigned process_type_length; // Length of |process_type|.
const char* distro; // Linux distro string.
unsigned distro_length; // Length of |distro|.
bool upload; // Whether to upload or save crash dump.
uint64_t process_start_time; // Uptime of the crashing process.
size_t oom_size; // Amount of memory requested if OOM.
uint64_t pid; // PID where applicable.
CrashKeyStorage* crash_keys;
};
void HandleCrashDump(const BreakpadInfo& info);
size_t WriteLog(const char* buf, size_t nbytes);
} // namespace crash_reporter
#endif // ATOM_COMMON_CRASH_REPORTER_LINUX_CRASH_DUMP_HANDLER_H_