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Unified Diff: chrome/app/breakpad_linux.cc

Issue 9838033: Upstream native crash handling changes for Android. (Closed) Base URL: http://git.chromium.org/git/chromium.git@trunk
Patch Set: Revert of Revert with fixes. Created 8 years, 8 months ago
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Index: chrome/app/breakpad_linux.cc
diff --git a/chrome/app/breakpad_linux.cc b/chrome/app/breakpad_linux.cc
deleted file mode 100644
index 17b4e8ae989ac8900d55838a67be2717d5f18d23..0000000000000000000000000000000000000000
--- a/chrome/app/breakpad_linux.cc
+++ /dev/null
@@ -1,1038 +0,0 @@
-// Copyright (c) 2012 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.
-#define SYS_SYSCALL_ENTRYPOINT "playground$syscallEntryPoint"
-
-#include "chrome/app/breakpad_linux.h"
-
-#include <fcntl.h>
-#include <poll.h>
-#include <stdlib.h>
-#include <sys/socket.h>
-#include <sys/time.h>
-#include <sys/types.h>
-#include <sys/wait.h>
-#include <sys/uio.h>
-#include <time.h>
-#include <unistd.h>
-
-#include <algorithm>
-#include <string>
-
-#include "base/command_line.h"
-#include "base/eintr_wrapper.h"
-#include "base/file_path.h"
-#include "base/global_descriptors_posix.h"
-#include "base/linux_util.h"
-#include "base/path_service.h"
-#include "base/process_util.h"
-#include "base/string_util.h"
-#include "breakpad/src/client/linux/handler/exception_handler.h"
-#include "breakpad/src/client/linux/minidump_writer/directory_reader.h"
-#include "breakpad/src/common/linux/linux_libc_support.h"
-#include "breakpad/src/common/memory.h"
-#include "chrome/browser/crash_upload_list.h"
-#include "chrome/common/child_process_logging.h"
-#include "chrome/common/chrome_paths.h"
-#include "chrome/common/chrome_switches.h"
-#include "chrome/common/chrome_version_info_posix.h"
-#include "chrome/common/env_vars.h"
-#include "chrome/common/logging_chrome.h"
-#include "content/common/chrome_descriptors.h"
-#include "seccompsandbox/linux_syscall_support.h"
-
-#ifndef PR_SET_PTRACER
-#define PR_SET_PTRACER 0x59616d61
-#endif
-
-// 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)
-
-static const char kUploadURL[] =
- "https://clients2.google.com/cr/report";
-
-static bool g_is_crash_reporter_enabled = false;
-static uint64_t g_process_start_time = 0;
-static char* g_crash_log_path = NULL;
-static google_breakpad::ExceptionHandler* g_breakpad = NULL;
-
-// Writes the value |v| as 16 hex characters to the memory pointed at by
-// |output|.
-static 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;
- }
-}
-
-// The following helper functions are for calculating uptime.
-
-// Converts a struct timeval to milliseconds.
-static 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;
-}
-
-// Converts a struct timeval to milliseconds.
-static 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;
-}
-
-// String buffer size to use to convert a uint64_t to string.
-static size_t kUint64StringSize = 21;
-
-// 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.
-static 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_itos() from
-// breakpad/src/common/linux/linux_libc_support.h. Convert a non-negative
-// integer to a string (not null-terminated).
-static 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);
-}
-
-namespace {
-
-// MIME substrings.
-static const char g_rn[] = "\r\n";
-static const char g_form_data_msg[] = "Content-Disposition: form-data; name=\"";
-static const char g_quote_msg[] = "\"";
-static const char g_dashdash_msg[] = "--";
-static const char g_dump_msg[] = "upload_file_minidump\"; filename=\"dump\"";
-static 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.
- void AddBoundary();
-
- // Append end of file boundary.
- void AddEnd();
-
- // Append key/value pair with specified sizes.
- 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.
- 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 dump. Currently this is only done once, so the name is
- // fixed.
- void AddFileDump(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;
- }
-
- private:
- 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[16];
- const unsigned num_len = my_int_len(++i);
- my_itos(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::AddFileDump(uint8_t* file_data,
- size_t file_size) {
- AddString(g_form_data_msg);
- AddString(g_dump_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) {
- while (size > 0) {
- const char* c = static_cast<const char*>(base) + size - 1;
- if (*c != ' ')
- break;
- size--;
- }
- AddItem(base, size);
-}
-
-void DumpProcess() {
- if (g_breakpad)
- g_breakpad->WriteMinidump();
-}
-
-} // namespace
-
-void HandleCrashDump(const BreakpadInfo& info) {
- // WARNING: this code runs in a compromised context. It may not call into
- // libc nor allocate memory normally.
-
- const int dumpfd = sys_open(info.filename, O_RDONLY, 0);
- if (dumpfd < 0) {
- static const char msg[] = "Cannot upload crash dump: failed to open\n";
- sys_write(2, msg, sizeof(msg));
- return;
- }
- struct kernel_stat st;
- if (sys_fstat(dumpfd, &st) != 0) {
- static const char msg[] = "Cannot upload crash dump: stat failed\n";
- sys_write(2, msg, sizeof(msg));
- IGNORE_RET(sys_close(dumpfd));
- return;
- }
-
- google_breakpad::PageAllocator allocator;
-
- uint8_t* dump_data = reinterpret_cast<uint8_t*>(allocator.Alloc(st.st_size));
- if (!dump_data) {
- static const char msg[] = "Cannot upload crash dump: cannot alloc\n";
- sys_write(2, msg, sizeof(msg));
- IGNORE_RET(sys_close(dumpfd));
- return;
- }
-
- sys_read(dumpfd, dump_data, st.st_size);
- IGNORE_RET(sys_close(dumpfd));
-
- // 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";
- sys_write(2, 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 (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";
- sys_write(2, 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";
- sys_write(2, 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
- // Content-Disposition: form-data; name="guid" \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 more gpu entries:
- // Content-Disposition: form-data; name="gpu-xxxxx" \r\n \r\n
- // <gpu-xxxxx> \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 more:
- // Content-Disposition: form-data; name="url-chunk-1" \r\n \r\n
- // abcdef \r\n
- // BOUNDARY \r\n
- //
- // zero or one:
- // Content-Disposition: form-data; name="channel" \r\n \r\n
- // beta \r\n
- // BOUNDARY \r\n
- //
- // zero or one:
- // Content-Disposition: form-data; name="num-views" \r\n \r\n
- // 3 \r\n
- // BOUNDARY \r\n
- //
- // zero or one:
- // Content-Disposition: form-data; name="num-extensions" \r\n \r\n
- // 5 \r\n
- // BOUNDARY \r\n
- //
- // zero to 10:
- // Content-Disposition: form-data; name="extension-1" \r\n \r\n
- // abcdefghijklmnopqrstuvwxyzabcdef \r\n
- // BOUNDARY \r\n
- //
- // zero to 4:
- // Content-Disposition: form-data; name="prn-info-1" \r\n \r\n
- // abcdefghijklmnopqrstuvwxyzabcdef \r\n
- // BOUNDARY \r\n
- //
- // zero or one:
- // Content-Disposition: form-data; name="num-switches" \r\n \r\n
- // 5 \r\n
- // BOUNDARY \r\n
- //
- // zero to 15:
- // Content-Disposition: form-data; name="switch-1" \r\n \r\n
- // --foo \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
- //
- // 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);
- {
-#if defined(OS_CHROMEOS)
- static const char chrome_product_msg[] = "Chrome_ChromeOS";
-#else // OS_LINUX
- static const char chrome_product_msg[] = "Chrome_Linux";
-#endif
- static const char version_msg[] = PRODUCT_VERSION;
-
- writer.AddBoundary();
- writer.AddPairString("prod", chrome_product_msg);
- writer.AddBoundary();
- writer.AddPairString("ver", version_msg);
- writer.AddBoundary();
- writer.AddPairString("guid", info.guid);
- 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 GPU info is known, send it.
- unsigned gpu_vendor_len = my_strlen(child_process_logging::g_gpu_vendor_id);
- if (gpu_vendor_len) {
- static const char vendor_msg[] = "gpu-venid";
- static const char device_msg[] = "gpu-devid";
- static const char driver_msg[] = "gpu-driver";
- static const char psver_msg[] = "gpu-psver";
- static const char vsver_msg[] = "gpu-vsver";
-
- writer.AddPairString(vendor_msg, child_process_logging::g_gpu_vendor_id);
- writer.AddBoundary();
- writer.AddPairString(device_msg, child_process_logging::g_gpu_device_id);
- writer.AddBoundary();
- writer.AddPairString(driver_msg, child_process_logging::g_gpu_driver_ver);
- writer.AddBoundary();
- writer.AddPairString(psver_msg, child_process_logging::g_gpu_ps_ver);
- writer.AddBoundary();
- writer.AddPairString(vsver_msg, child_process_logging::g_gpu_vs_ver);
- 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();
- }
-
- // For renderers and plugins.
- if (info.crash_url_length) {
- static const char url_chunk_msg[] = "url-chunk-";
- static const unsigned kMaxUrlLength = 8 * MimeWriter::kMaxCrashChunkSize;
- writer.AddPairDataInChunks(url_chunk_msg, sizeof(url_chunk_msg) - 1,
- info.crash_url, std::min(info.crash_url_length, kMaxUrlLength),
- MimeWriter::kMaxCrashChunkSize, false /* Don't strip whitespaces. */);
- }
-
- if (my_strlen(child_process_logging::g_channel)) {
- writer.AddPairString("channel", child_process_logging::g_channel);
- writer.AddBoundary();
- writer.Flush();
- }
-
- if (my_strlen(child_process_logging::g_num_views)) {
- writer.AddPairString("num-views", child_process_logging::g_num_views);
- writer.AddBoundary();
- writer.Flush();
- }
-
- if (my_strlen(child_process_logging::g_num_extensions)) {
- writer.AddPairString("num-extensions",
- child_process_logging::g_num_extensions);
- writer.AddBoundary();
- writer.Flush();
- }
-
- unsigned extension_ids_len =
- my_strlen(child_process_logging::g_extension_ids);
- if (extension_ids_len) {
- static const char extension_msg[] = "extension-";
- static const unsigned kMaxExtensionsLen =
- kMaxReportedActiveExtensions * child_process_logging::kExtensionLen;
- writer.AddPairDataInChunks(extension_msg, sizeof(extension_msg) - 1,
- child_process_logging::g_extension_ids,
- std::min(extension_ids_len, kMaxExtensionsLen),
- child_process_logging::kExtensionLen,
- false /* Don't strip whitespace. */);
- }
-
- unsigned printer_info_len =
- my_strlen(child_process_logging::g_printer_info);
- if (printer_info_len) {
- static const char printer_info_msg[] = "prn-info-";
- static const unsigned kMaxPrnInfoLen =
- kMaxReportedPrinterRecords * child_process_logging::kPrinterInfoStrLen;
- writer.AddPairDataInChunks(printer_info_msg, sizeof(printer_info_msg) - 1,
- child_process_logging::g_printer_info,
- std::min(printer_info_len, kMaxPrnInfoLen),
- child_process_logging::kPrinterInfoStrLen,
- true);
- }
-
- if (my_strlen(child_process_logging::g_num_switches)) {
- writer.AddPairString("num-switches",
- child_process_logging::g_num_switches);
- writer.AddBoundary();
- writer.Flush();
- }
-
- unsigned switches_len =
- my_strlen(child_process_logging::g_switches);
- if (switches_len) {
- static const char switch_msg[] = "switch-";
- static const unsigned kMaxSwitchLen =
- kMaxSwitches * child_process_logging::kSwitchLen;
- writer.AddPairDataInChunks(switch_msg, sizeof(switch_msg) - 1,
- child_process_logging::g_switches,
- std::min(switches_len, kMaxSwitchLen),
- child_process_logging::kSwitchLen,
- true /* Strip whitespace since switches are padded to kSwitchLen. */);
- }
-
- 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();
- }
-
- writer.AddFileDump(dump_data, st.st_size);
- writer.AddEnd();
- writer.Flush();
-
- IGNORE_RET(sys_close(temp_file_fd));
-
- if (!info.upload)
- return;
-
- // 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 + sizeof(mime_boundary) - 2));
- memcpy(header, header_msg, sizeof(header_msg) - 1);
- memcpy(header + sizeof(header_msg) - 1, mime_boundary + 2,
- sizeof(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 + sizeof(temp_file)));
- memcpy(post_file, post_file_msg, sizeof(post_file_msg) - 1);
- memcpy(post_file + sizeof(post_file_msg) - 1, temp_file, sizeof(temp_file));
-
- 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 wget process and watch for it getting
- // closed by the wget process exiting.
- int fds[2];
- if (sys_pipe(fds) >= 0) {
- const pid_t wget_child = sys_fork();
- if (!wget_child) {
- // Wget process.
- IGNORE_RET(sys_close(fds[0]));
- IGNORE_RET(sys_dup2(fds[1], 3));
- static const char* const kWgetBinary = "/usr/bin/wget";
- const char* args[] = {
- kWgetBinary,
- header,
- post_file,
- 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,
- };
-
- execve(kWgetBinary, const_cast<char**>(args), environ);
- static const char msg[] = "Cannot upload crash dump: cannot exec "
- "/usr/bin/wget\n";
- sys_write(2, msg, sizeof(msg) - 1);
- sys__exit(1);
- }
-
- // Helper process.
- if (wget_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;
- // Wget 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: ";
- sys_write(2, msg, sizeof(msg) - 1);
- sys_write(2, id_buf, my_strlen(id_buf));
- sys_write(2, "\n", 1);
-
- // Write crash dump id to crash log as: seconds_since_epoch,crash_id
- struct kernel_timeval tv;
- if (g_crash_log_path && !sys_gettimeofday(&tv, NULL)) {
- uint64_t time = kernel_timeval_to_ms(&tv) / 1000;
- char time_str[kUint64StringSize];
- const unsigned time_len = my_uint64_len(time);
- my_uint64tos(time_str, time, time_len);
-
- int log_fd = sys_open(g_crash_log_path,
- O_CREAT | O_WRONLY | O_APPEND,
- 0600);
- if (log_fd > 0) {
- sys_write(log_fd, time_str, time_len);
- sys_write(log_fd, ",", 1);
- sys_write(log_fd, id_buf, my_strlen(id_buf));
- sys_write(log_fd, "\n", 1);
- IGNORE_RET(sys_close(log_fd));
- }
- }
- }
- if (sys_waitpid(wget_child, NULL, WNOHANG) == 0) {
- // Wget process is still around, kill it.
- sys_kill(wget_child, SIGKILL);
- }
- }
- }
-
- // Helper process.
- IGNORE_RET(sys_unlink(info.filename));
- IGNORE_RET(sys_unlink(temp_file));
- sys__exit(0);
- }
-
- // Main browser process.
- if (child <= 0)
- return;
- HANDLE_EINTR(sys_waitpid(child, NULL, 0));
-}
-
-static bool CrashDone(const char* dump_path,
- const char* minidump_id,
- const bool upload,
- const bool succeeded) {
- // WARNING: this code runs in a compromised context. It may not call into
- // libc nor allocate memory normally.
- if (!succeeded)
- return false;
-
- google_breakpad::PageAllocator allocator;
- const unsigned dump_path_len = my_strlen(dump_path);
- const unsigned minidump_id_len = my_strlen(minidump_id);
- char* const path = reinterpret_cast<char*>(allocator.Alloc(
- dump_path_len + 1 /* '/' */ + minidump_id_len +
- 4 /* ".dmp" */ + 1 /* NUL */));
- memcpy(path, dump_path, dump_path_len);
- path[dump_path_len] = '/';
- memcpy(path + dump_path_len + 1, minidump_id, minidump_id_len);
- memcpy(path + dump_path_len + 1 + minidump_id_len, ".dmp", 4);
- path[dump_path_len + 1 + minidump_id_len + 4] = 0;
-
- BreakpadInfo info;
- info.filename = path;
- info.process_type = "browser";
- info.process_type_length = 7;
- info.crash_url = NULL;
- info.crash_url_length = 0;
- info.guid = child_process_logging::g_client_id;
- info.guid_length = my_strlen(child_process_logging::g_client_id);
- info.distro = base::g_linux_distro;
- info.distro_length = my_strlen(base::g_linux_distro);
- info.upload = upload;
- info.process_start_time = g_process_start_time;
- info.oom_size = base::g_oom_size;
- HandleCrashDump(info);
- return true;
-}
-
-// Wrapper function, do not add more code here.
-static bool CrashDoneNoUpload(const char* dump_path,
- const char* minidump_id,
- void* context,
- bool succeeded) {
- return CrashDone(dump_path, minidump_id, false, succeeded);
-}
-
-// Wrapper function, do not add more code here.
-static bool CrashDoneUpload(const char* dump_path,
- const char* minidump_id,
- void* context,
- bool succeeded) {
- return CrashDone(dump_path, minidump_id, true, succeeded);
-}
-
-void EnableCrashDumping(const bool unattended) {
- g_is_crash_reporter_enabled = true;
-
- FilePath tmp_path("/tmp");
- PathService::Get(base::DIR_TEMP, &tmp_path);
-
- FilePath dumps_path(tmp_path);
- if (PathService::Get(chrome::DIR_CRASH_DUMPS, &dumps_path)) {
- FilePath logfile =
- dumps_path.AppendASCII(CrashUploadList::kReporterLogFilename);
- std::string logfile_str = logfile.value();
- const size_t crash_log_path_len = logfile_str.size() + 1;
- g_crash_log_path = new char[crash_log_path_len];
- strncpy(g_crash_log_path, logfile_str.c_str(), crash_log_path_len);
- }
-
- DCHECK(!g_breakpad);
- if (unattended) {
- g_breakpad = new google_breakpad::ExceptionHandler(
- dumps_path.value().c_str(),
- NULL,
- CrashDoneNoUpload,
- NULL,
- true /* install handlers */);
- } else {
- g_breakpad = new google_breakpad::ExceptionHandler(
- tmp_path.value().c_str(),
- NULL,
- CrashDoneUpload,
- NULL,
- true /* install handlers */);
- }
-}
-
-// Non-Browser = Extension, Gpu, Plugins, Ppapi and Renderer
-static bool NonBrowserCrashHandler(const void* crash_context,
- size_t crash_context_size,
- void* context) {
- const int fd = reinterpret_cast<intptr_t>(context);
- int fds[2] = { -1, -1 };
- if (sys_socketpair(AF_UNIX, SOCK_STREAM, 0, fds) < 0) {
- static const char msg[] = "Failed to create socket for crash dumping.\n";
- sys_write(2, msg, sizeof(msg)-1);
- return false;
- }
-
- // On kernels with ptrace protection, e.g. Ubuntu 10.10+, the browser cannot
- // ptrace this crashing process and crash dumping will fail. When using the
- // SUID sandbox, this crashing process is likely to be in its own PID
- // namespace, and thus there is no way to permit only the browser process to
- // ptrace it.
- // The workaround is to allow all processes to ptrace this process if we
- // reach this point, by passing -1 as the allowed PID. However, support for
- // passing -1 as the PID won't reach kernels until around the Ubuntu 12.04
- // timeframe.
- sys_prctl(PR_SET_PTRACER, -1);
-
- // Start constructing the message to send to the browser.
- char guid[kGuidSize + 1] = {0};
- char crash_url[kMaxActiveURLSize + 1] = {0};
- char distro[kDistroSize + 1] = {0};
- const size_t guid_len =
- std::min(my_strlen(child_process_logging::g_client_id), kGuidSize);
- const size_t crash_url_len =
- std::min(my_strlen(child_process_logging::g_active_url),
- kMaxActiveURLSize);
- const size_t distro_len =
- std::min(my_strlen(base::g_linux_distro), kDistroSize);
- memcpy(guid, child_process_logging::g_client_id, guid_len);
- memcpy(crash_url, child_process_logging::g_active_url, crash_url_len);
- memcpy(distro, base::g_linux_distro, distro_len);
-
- char b; // Dummy variable for sys_read below.
- const char* b_addr = &b; // Get the address of |b| so we can create the
- // expected /proc/[pid]/syscall content in the
- // browser to convert namespace tids.
-
- // The length of the control message:
- static const unsigned kControlMsgSize = sizeof(fds);
- static const unsigned kControlMsgSpaceSize = CMSG_SPACE(kControlMsgSize);
- static const unsigned kControlMsgLenSize = CMSG_LEN(kControlMsgSize);
-
- const size_t kIovSize = 8;
- struct kernel_msghdr msg;
- my_memset(&msg, 0, sizeof(struct kernel_msghdr));
- struct kernel_iovec iov[kIovSize];
- iov[0].iov_base = const_cast<void*>(crash_context);
- iov[0].iov_len = crash_context_size;
- iov[1].iov_base = guid;
- iov[1].iov_len = kGuidSize + 1;
- iov[2].iov_base = crash_url;
- iov[2].iov_len = kMaxActiveURLSize + 1;
- iov[3].iov_base = distro;
- iov[3].iov_len = kDistroSize + 1;
- iov[4].iov_base = &b_addr;
- iov[4].iov_len = sizeof(b_addr);
- iov[5].iov_base = &fds[0];
- iov[5].iov_len = sizeof(fds[0]);
- iov[6].iov_base = &g_process_start_time;
- iov[6].iov_len = sizeof(g_process_start_time);
- iov[7].iov_base = &base::g_oom_size;
- iov[7].iov_len = sizeof(base::g_oom_size);
-
- msg.msg_iov = iov;
- msg.msg_iovlen = kIovSize;
- char cmsg[kControlMsgSpaceSize];
- my_memset(cmsg, 0, kControlMsgSpaceSize);
- msg.msg_control = cmsg;
- msg.msg_controllen = sizeof(cmsg);
-
- struct cmsghdr *hdr = CMSG_FIRSTHDR(&msg);
- hdr->cmsg_level = SOL_SOCKET;
- hdr->cmsg_type = SCM_RIGHTS;
- hdr->cmsg_len = kControlMsgLenSize;
- ((int*) CMSG_DATA(hdr))[0] = fds[0];
- ((int*) CMSG_DATA(hdr))[1] = fds[1];
-
- if (HANDLE_EINTR(sys_sendmsg(fd, &msg, 0)) < 0) {
- static const char errmsg[] = "Failed to tell parent about crash.\n";
- sys_write(2, errmsg, sizeof(errmsg)-1);
- IGNORE_RET(sys_close(fds[1]));
- return false;
- }
- IGNORE_RET(sys_close(fds[1]));
-
- if (HANDLE_EINTR(sys_read(fds[0], &b, 1)) != 1) {
- static const char errmsg[] = "Parent failed to complete crash dump.\n";
- sys_write(2, errmsg, sizeof(errmsg)-1);
- }
-
- return true;
-}
-
-void EnableNonBrowserCrashDumping() {
- const int fd = base::GlobalDescriptors::GetInstance()->Get(kCrashDumpSignal);
- g_is_crash_reporter_enabled = true;
- // We deliberately leak this object.
- DCHECK(!g_breakpad);
- g_breakpad = new google_breakpad::ExceptionHandler(
- "" /* unused */, NULL, NULL, reinterpret_cast<void*>(fd), true);
- g_breakpad->set_crash_handler(NonBrowserCrashHandler);
-}
-
-void InitCrashReporter() {
- // Determine the process type and take appropriate action.
- const CommandLine& parsed_command_line = *CommandLine::ForCurrentProcess();
- if (parsed_command_line.HasSwitch(switches::kDisableBreakpad))
- return;
-
- const std::string process_type =
- parsed_command_line.GetSwitchValueASCII(switches::kProcessType);
- if (process_type.empty()) {
- EnableCrashDumping(getenv(env_vars::kHeadless) != NULL);
- } else if (process_type == switches::kRendererProcess ||
- process_type == switches::kPluginProcess ||
- process_type == switches::kPpapiPluginProcess ||
- process_type == switches::kZygoteProcess ||
- process_type == switches::kGpuProcess) {
- // We might be chrooted in a zygote or renderer process so we cannot call
- // GetCollectStatsConsent because that needs access the the user's home
- // dir. Instead, we set a command line flag for these processes.
- // Even though plugins are not chrooted, we share the same code path for
- // simplicity.
- if (!parsed_command_line.HasSwitch(switches::kEnableCrashReporter))
- return;
- // Get the guid and linux distro from the command line switch.
- std::string switch_value =
- parsed_command_line.GetSwitchValueASCII(switches::kEnableCrashReporter);
- size_t separator = switch_value.find(",");
- if (separator != std::string::npos) {
- child_process_logging::SetClientId(switch_value.substr(0, separator));
- base::SetLinuxDistro(switch_value.substr(separator + 1));
- } else {
- child_process_logging::SetClientId(switch_value);
- }
- EnableNonBrowserCrashDumping();
- }
-
- // 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;
-
- logging::SetDumpWithoutCrashingFunction(&DumpProcess);
-}
-
-bool IsCrashReporterEnabled() {
- return g_is_crash_reporter_enabled;
-}
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