18bcbed890bc3ce4d7a057a8f32cab53fa534672eTorne (Richard Coles)// Copyright 2013 The Chromium Authors. All rights reserved. 25821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)// Use of this source code is governed by a BSD-style license that can be 35821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)// found in the LICENSE file. 45821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 51320f92c476a1ad9d19dba2a48c72b75566198e9Primiano Tucci#include "components/crash/browser/crash_handler_host_linux.h" 65821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 75821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)#include <stdint.h> 85821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)#include <stdlib.h> 95821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)#include <sys/socket.h> 105821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)#include <sys/syscall.h> 115821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)#include <unistd.h> 125821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 135821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)#include "base/bind.h" 145821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)#include "base/bind_helpers.h" 152a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles)#include "base/files/file_path.h" 161320f92c476a1ad9d19dba2a48c72b75566198e9Primiano Tucci#include "base/files/file_util.h" 1746d4c2bc3267f3f028f39e7e311b0f89aba2e4fdTorne (Richard Coles)#include "base/files/scoped_file.h" 185821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)#include "base/format_macros.h" 195821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)#include "base/linux_util.h" 205821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)#include "base/logging.h" 219ab5563a3196760eb381d102cbb2bc0f7abc6a50Ben Murdoch#include "base/message_loop/message_loop.h" 225821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)#include "base/path_service.h" 232a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles)#include "base/posix/eintr_wrapper.h" 245821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)#include "base/rand_util.h" 25868fa2fe829687343ffae624259930155e16dbd8Torne (Richard Coles)#include "base/strings/string_util.h" 26868fa2fe829687343ffae624259930155e16dbd8Torne (Richard Coles)#include "base/strings/stringprintf.h" 275821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)#include "base/threading/thread.h" 285821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)#include "breakpad/src/client/linux/handler/exception_handler.h" 295821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)#include "breakpad/src/client/linux/minidump_writer/linux_dumper.h" 305821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)#include "breakpad/src/client/linux/minidump_writer/minidump_writer.h" 311320f92c476a1ad9d19dba2a48c72b75566198e9Primiano Tucci#include "components/crash/app/breakpad_linux_impl.h" 325821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)#include "content/public/browser/browser_thread.h" 335821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 34cedac228d2dd51db4b79ea1e72c7f249408ee061Torne (Richard Coles)#if defined(OS_ANDROID) && !defined(__LP64__) 355821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)#include <sys/linux-syscalls.h> 365821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 375821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)#define SYS_read __NR_read 385821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)#endif 395821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 405821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)using content::BrowserThread; 415821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)using google_breakpad::ExceptionHandler; 425821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 438bcbed890bc3ce4d7a057a8f32cab53fa534672eTorne (Richard Coles)namespace breakpad { 448bcbed890bc3ce4d7a057a8f32cab53fa534672eTorne (Richard Coles) 455821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)namespace { 465821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 47cedac228d2dd51db4b79ea1e72c7f249408ee061Torne (Richard Coles)const size_t kNumFDs = 1; 485821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)// The length of the control message: 49cedac228d2dd51db4b79ea1e72c7f249408ee061Torne (Richard Coles)const size_t kControlMsgSize = 50cedac228d2dd51db4b79ea1e72c7f249408ee061Torne (Richard Coles) CMSG_SPACE(kNumFDs * sizeof(int)) + CMSG_SPACE(sizeof(struct ucred)); 515821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)// The length of the regular payload: 52cedac228d2dd51db4b79ea1e72c7f249408ee061Torne (Richard Coles)const size_t kCrashContextSize = sizeof(ExceptionHandler::CrashContext); 535821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 545821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)// Handles the crash dump and frees the allocated BreakpadInfo struct. 55cedac228d2dd51db4b79ea1e72c7f249408ee061Torne (Richard Coles)void CrashDumpTask(CrashHandlerHostLinux* handler, 56cedac228d2dd51db4b79ea1e72c7f249408ee061Torne (Richard Coles) scoped_ptr<BreakpadInfo> info) { 57f2477e01787aa58f445919b809d89e252beef54fTorne (Richard Coles) if (handler->IsShuttingDown() && info->upload) { 58f2477e01787aa58f445919b809d89e252beef54fTorne (Richard Coles) base::DeleteFile(base::FilePath(info->filename), false); 59f2477e01787aa58f445919b809d89e252beef54fTorne (Richard Coles)#if defined(ADDRESS_SANITIZER) 60f2477e01787aa58f445919b809d89e252beef54fTorne (Richard Coles) base::DeleteFile(base::FilePath(info->log_filename), false); 61f2477e01787aa58f445919b809d89e252beef54fTorne (Richard Coles)#endif 625821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) return; 63f2477e01787aa58f445919b809d89e252beef54fTorne (Richard Coles) } 645821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 655821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) HandleCrashDump(*info); 665821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) delete[] info->filename; 67f2477e01787aa58f445919b809d89e252beef54fTorne (Richard Coles)#if defined(ADDRESS_SANITIZER) 68f2477e01787aa58f445919b809d89e252beef54fTorne (Richard Coles) delete[] info->log_filename; 69cedac228d2dd51db4b79ea1e72c7f249408ee061Torne (Richard Coles) delete[] info->asan_report_str; 70f2477e01787aa58f445919b809d89e252beef54fTorne (Richard Coles)#endif 715821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) delete[] info->process_type; 725821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) delete[] info->distro; 73868fa2fe829687343ffae624259930155e16dbd8Torne (Richard Coles) delete info->crash_keys; 745821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)} 755821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 765821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)} // namespace 775821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 788bcbed890bc3ce4d7a057a8f32cab53fa534672eTorne (Richard Coles)// Since instances of CrashHandlerHostLinux are leaked, they are only destroyed 798bcbed890bc3ce4d7a057a8f32cab53fa534672eTorne (Richard Coles)// at the end of the processes lifetime, which is greater in span than the 808bcbed890bc3ce4d7a057a8f32cab53fa534672eTorne (Richard Coles)// lifetime of the IO message loop. Thus, all calls to base::Bind() use 815821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)// non-refcounted pointers. 825821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 838bcbed890bc3ce4d7a057a8f32cab53fa534672eTorne (Richard Coles)CrashHandlerHostLinux::CrashHandlerHostLinux(const std::string& process_type, 848bcbed890bc3ce4d7a057a8f32cab53fa534672eTorne (Richard Coles) const base::FilePath& dumps_path, 858bcbed890bc3ce4d7a057a8f32cab53fa534672eTorne (Richard Coles) bool upload) 868bcbed890bc3ce4d7a057a8f32cab53fa534672eTorne (Richard Coles) : process_type_(process_type), 878bcbed890bc3ce4d7a057a8f32cab53fa534672eTorne (Richard Coles) dumps_path_(dumps_path), 888bcbed890bc3ce4d7a057a8f32cab53fa534672eTorne (Richard Coles) upload_(upload), 898bcbed890bc3ce4d7a057a8f32cab53fa534672eTorne (Richard Coles) shutting_down_(false), 904e180b6a0b4720a9b8e9e959a882386f690f08ffTorne (Richard Coles) worker_pool_token_(BrowserThread::GetBlockingPool()->GetSequenceToken()) { 915821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) int fds[2]; 925821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) // We use SOCK_SEQPACKET rather than SOCK_DGRAM to prevent the process from 935821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) // sending datagrams to other sockets on the system. The sandbox may prevent 945821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) // the process from calling socket() to create new sockets, but it'll still 955821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) // inherit some sockets. With PF_UNIX+SOCK_DGRAM, it can call sendmsg to send 965821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) // a datagram to any (abstract) socket on the same system. With 975821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) // SOCK_SEQPACKET, this is prevented. 98cedac228d2dd51db4b79ea1e72c7f249408ee061Torne (Richard Coles) CHECK_EQ(0, socketpair(AF_UNIX, SOCK_SEQPACKET, 0, fds)); 995821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) static const int on = 1; 1005821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 1015821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) // Enable passcred on the server end of the socket 102cedac228d2dd51db4b79ea1e72c7f249408ee061Torne (Richard Coles) CHECK_EQ(0, setsockopt(fds[1], SOL_SOCKET, SO_PASSCRED, &on, sizeof(on))); 1035821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 1045821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) process_socket_ = fds[0]; 1055821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) browser_socket_ = fds[1]; 1065821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 1075821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) BrowserThread::PostTask( 1085821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) BrowserThread::IO, FROM_HERE, 1095821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) base::Bind(&CrashHandlerHostLinux::Init, base::Unretained(this))); 1105821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)} 1115821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 1125821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)CrashHandlerHostLinux::~CrashHandlerHostLinux() { 113a3f6a49ab37290eeeb8db0f41ec0f1cb74a68be7Torne (Richard Coles) close(process_socket_); 114a3f6a49ab37290eeeb8db0f41ec0f1cb74a68be7Torne (Richard Coles) close(browser_socket_); 1155821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)} 1165821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 1178bcbed890bc3ce4d7a057a8f32cab53fa534672eTorne (Richard Coles)void CrashHandlerHostLinux::StartUploaderThread() { 1188bcbed890bc3ce4d7a057a8f32cab53fa534672eTorne (Richard Coles) uploader_thread_.reset( 1190529e5d033099cbfc42635f6f6183833b09dff6eBen Murdoch new base::Thread(process_type_ + "_crash_uploader")); 1208bcbed890bc3ce4d7a057a8f32cab53fa534672eTorne (Richard Coles) uploader_thread_->Start(); 1218bcbed890bc3ce4d7a057a8f32cab53fa534672eTorne (Richard Coles)} 1228bcbed890bc3ce4d7a057a8f32cab53fa534672eTorne (Richard Coles) 1235821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)void CrashHandlerHostLinux::Init() { 12490dce4d38c5ff5333bea97d859d4e484e27edf0cTorne (Richard Coles) base::MessageLoopForIO* ml = base::MessageLoopForIO::current(); 1255821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) CHECK(ml->WatchFileDescriptor( 1265821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) browser_socket_, true /* persistent */, 12790dce4d38c5ff5333bea97d859d4e484e27edf0cTorne (Richard Coles) base::MessageLoopForIO::WATCH_READ, 1285821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) &file_descriptor_watcher_, this)); 1295821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) ml->AddDestructionObserver(this); 1305821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)} 1315821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 1325821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)void CrashHandlerHostLinux::OnFileCanWriteWithoutBlocking(int fd) { 1335821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) NOTREACHED(); 1345821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)} 1355821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 1365821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)void CrashHandlerHostLinux::OnFileCanReadWithoutBlocking(int fd) { 137cedac228d2dd51db4b79ea1e72c7f249408ee061Torne (Richard Coles) DCHECK_EQ(browser_socket_, fd); 1385821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 1395821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) // A process has crashed and has signaled us by writing a datagram 1405821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) // to the death signal socket. The datagram contains the crash context needed 1415821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) // for writing the minidump as well as a file descriptor and a credentials 1425821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) // block so that they can't lie about their pid. 1435821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) // 1441320f92c476a1ad9d19dba2a48c72b75566198e9Primiano Tucci // The message sender is in components/crash/app/breakpad_linux.cc. 1455821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 1465821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) struct msghdr msg = {0}; 147868fa2fe829687343ffae624259930155e16dbd8Torne (Richard Coles) struct iovec iov[kCrashIovSize]; 1485821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 149cedac228d2dd51db4b79ea1e72c7f249408ee061Torne (Richard Coles) scoped_ptr<char[]> crash_context(new char[kCrashContextSize]); 1505821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)#if defined(ADDRESS_SANITIZER) 151cedac228d2dd51db4b79ea1e72c7f249408ee061Torne (Richard Coles) scoped_ptr<char[]> asan_report(new char[kMaxAsanReportSize + 1]); 1525821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)#endif 1535821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 154cedac228d2dd51db4b79ea1e72c7f249408ee061Torne (Richard Coles) scoped_ptr<CrashKeyStorage> crash_keys(new CrashKeyStorage); 155868fa2fe829687343ffae624259930155e16dbd8Torne (Richard Coles) google_breakpad::SerializedNonAllocatingMap* serialized_crash_keys; 156868fa2fe829687343ffae624259930155e16dbd8Torne (Richard Coles) size_t crash_keys_size = crash_keys->Serialize( 157868fa2fe829687343ffae624259930155e16dbd8Torne (Richard Coles) const_cast<const google_breakpad::SerializedNonAllocatingMap**>( 158868fa2fe829687343ffae624259930155e16dbd8Torne (Richard Coles) &serialized_crash_keys)); 159868fa2fe829687343ffae624259930155e16dbd8Torne (Richard Coles) 1605821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) char* tid_buf_addr = NULL; 1615821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) int tid_fd = -1; 1625821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) uint64_t uptime; 1635821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) size_t oom_size; 1645821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) char control[kControlMsgSize]; 1655821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) const ssize_t expected_msg_size = 1665821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) kCrashContextSize + 1675821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) sizeof(tid_buf_addr) + sizeof(tid_fd) + 1685821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) sizeof(uptime) + 1695821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)#if defined(ADDRESS_SANITIZER) 1705821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) kMaxAsanReportSize + 1 + 1715821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)#endif 172868fa2fe829687343ffae624259930155e16dbd8Torne (Richard Coles) sizeof(oom_size) + 173868fa2fe829687343ffae624259930155e16dbd8Torne (Richard Coles) crash_keys_size; 174cedac228d2dd51db4b79ea1e72c7f249408ee061Torne (Richard Coles) iov[0].iov_base = crash_context.get(); 1755821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) iov[0].iov_len = kCrashContextSize; 176cedac228d2dd51db4b79ea1e72c7f249408ee061Torne (Richard Coles) iov[1].iov_base = &tid_buf_addr; 177cedac228d2dd51db4b79ea1e72c7f249408ee061Torne (Richard Coles) iov[1].iov_len = sizeof(tid_buf_addr); 178cedac228d2dd51db4b79ea1e72c7f249408ee061Torne (Richard Coles) iov[2].iov_base = &tid_fd; 179cedac228d2dd51db4b79ea1e72c7f249408ee061Torne (Richard Coles) iov[2].iov_len = sizeof(tid_fd); 180cedac228d2dd51db4b79ea1e72c7f249408ee061Torne (Richard Coles) iov[3].iov_base = &uptime; 181cedac228d2dd51db4b79ea1e72c7f249408ee061Torne (Richard Coles) iov[3].iov_len = sizeof(uptime); 182cedac228d2dd51db4b79ea1e72c7f249408ee061Torne (Richard Coles) iov[4].iov_base = &oom_size; 183cedac228d2dd51db4b79ea1e72c7f249408ee061Torne (Richard Coles) iov[4].iov_len = sizeof(oom_size); 184cedac228d2dd51db4b79ea1e72c7f249408ee061Torne (Richard Coles) iov[5].iov_base = serialized_crash_keys; 185cedac228d2dd51db4b79ea1e72c7f249408ee061Torne (Richard Coles) iov[5].iov_len = crash_keys_size; 186cedac228d2dd51db4b79ea1e72c7f249408ee061Torne (Richard Coles)#if !defined(ADDRESS_SANITIZER) 187cedac228d2dd51db4b79ea1e72c7f249408ee061Torne (Richard Coles) COMPILE_ASSERT(5 == kCrashIovSize - 1, Incorrect_Number_Of_Iovec_Members); 188cedac228d2dd51db4b79ea1e72c7f249408ee061Torne (Richard Coles)#else 189cedac228d2dd51db4b79ea1e72c7f249408ee061Torne (Richard Coles) iov[6].iov_base = asan_report.get(); 190cedac228d2dd51db4b79ea1e72c7f249408ee061Torne (Richard Coles) iov[6].iov_len = kMaxAsanReportSize + 1; 191cedac228d2dd51db4b79ea1e72c7f249408ee061Torne (Richard Coles) COMPILE_ASSERT(6 == kCrashIovSize - 1, Incorrect_Number_Of_Iovec_Members); 1925821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)#endif 1935821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) msg.msg_iov = iov; 194868fa2fe829687343ffae624259930155e16dbd8Torne (Richard Coles) msg.msg_iovlen = kCrashIovSize; 1955821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) msg.msg_control = control; 1965821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) msg.msg_controllen = kControlMsgSize; 1975821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 1985821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) const ssize_t msg_size = HANDLE_EINTR(recvmsg(browser_socket_, &msg, 0)); 19946d4c2bc3267f3f028f39e7e311b0f89aba2e4fdTorne (Richard Coles) if (msg_size < 0) { 2005821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) LOG(ERROR) << "Error reading from death signal socket. Crash dumping" 2015821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) << " is disabled." 2025821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) << " msg_size:" << msg_size 2035821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) << " errno:" << errno; 2045821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) file_descriptor_watcher_.StopWatchingFileDescriptor(); 2055821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) return; 2065821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) } 20746d4c2bc3267f3f028f39e7e311b0f89aba2e4fdTorne (Richard Coles) const bool bad_message = (msg_size != expected_msg_size || 20846d4c2bc3267f3f028f39e7e311b0f89aba2e4fdTorne (Richard Coles) msg.msg_controllen != kControlMsgSize || 20946d4c2bc3267f3f028f39e7e311b0f89aba2e4fdTorne (Richard Coles) msg.msg_flags & ~MSG_TRUNC); 21046d4c2bc3267f3f028f39e7e311b0f89aba2e4fdTorne (Richard Coles) base::ScopedFD signal_fd; 21146d4c2bc3267f3f028f39e7e311b0f89aba2e4fdTorne (Richard Coles) pid_t crashing_pid = -1; 21246d4c2bc3267f3f028f39e7e311b0f89aba2e4fdTorne (Richard Coles) if (msg.msg_controllen > 0) { 21346d4c2bc3267f3f028f39e7e311b0f89aba2e4fdTorne (Richard Coles) // Walk the control payload and extract the file descriptor and 21446d4c2bc3267f3f028f39e7e311b0f89aba2e4fdTorne (Richard Coles) // validated pid. 21546d4c2bc3267f3f028f39e7e311b0f89aba2e4fdTorne (Richard Coles) for (struct cmsghdr *hdr = CMSG_FIRSTHDR(&msg); hdr; 21646d4c2bc3267f3f028f39e7e311b0f89aba2e4fdTorne (Richard Coles) hdr = CMSG_NXTHDR(&msg, hdr)) { 21746d4c2bc3267f3f028f39e7e311b0f89aba2e4fdTorne (Richard Coles) if (hdr->cmsg_level != SOL_SOCKET) 21846d4c2bc3267f3f028f39e7e311b0f89aba2e4fdTorne (Richard Coles) continue; 21946d4c2bc3267f3f028f39e7e311b0f89aba2e4fdTorne (Richard Coles) if (hdr->cmsg_type == SCM_RIGHTS) { 22046d4c2bc3267f3f028f39e7e311b0f89aba2e4fdTorne (Richard Coles) const size_t len = hdr->cmsg_len - 22146d4c2bc3267f3f028f39e7e311b0f89aba2e4fdTorne (Richard Coles) (((uint8_t*)CMSG_DATA(hdr)) - (uint8_t*)hdr); 22246d4c2bc3267f3f028f39e7e311b0f89aba2e4fdTorne (Richard Coles) DCHECK_EQ(0U, len % sizeof(int)); 22346d4c2bc3267f3f028f39e7e311b0f89aba2e4fdTorne (Richard Coles) const size_t num_fds = len / sizeof(int); 22446d4c2bc3267f3f028f39e7e311b0f89aba2e4fdTorne (Richard Coles) if (num_fds != kNumFDs) { 22546d4c2bc3267f3f028f39e7e311b0f89aba2e4fdTorne (Richard Coles) // A nasty process could try and send us too many descriptors and 22646d4c2bc3267f3f028f39e7e311b0f89aba2e4fdTorne (Richard Coles) // force a leak. 22746d4c2bc3267f3f028f39e7e311b0f89aba2e4fdTorne (Richard Coles) LOG(ERROR) << "Death signal contained wrong number of descriptors;" 22846d4c2bc3267f3f028f39e7e311b0f89aba2e4fdTorne (Richard Coles) << " num_fds:" << num_fds; 22946d4c2bc3267f3f028f39e7e311b0f89aba2e4fdTorne (Richard Coles) for (size_t i = 0; i < num_fds; ++i) 23046d4c2bc3267f3f028f39e7e311b0f89aba2e4fdTorne (Richard Coles) close(reinterpret_cast<int*>(CMSG_DATA(hdr))[i]); 23146d4c2bc3267f3f028f39e7e311b0f89aba2e4fdTorne (Richard Coles) return; 23246d4c2bc3267f3f028f39e7e311b0f89aba2e4fdTorne (Richard Coles) } 23346d4c2bc3267f3f028f39e7e311b0f89aba2e4fdTorne (Richard Coles) DCHECK(!signal_fd.is_valid()); 23446d4c2bc3267f3f028f39e7e311b0f89aba2e4fdTorne (Richard Coles) int fd = reinterpret_cast<int*>(CMSG_DATA(hdr))[0]; 23546d4c2bc3267f3f028f39e7e311b0f89aba2e4fdTorne (Richard Coles) DCHECK_GE(fd, 0); // The kernel should never send a negative fd. 23646d4c2bc3267f3f028f39e7e311b0f89aba2e4fdTorne (Richard Coles) signal_fd.reset(fd); 23746d4c2bc3267f3f028f39e7e311b0f89aba2e4fdTorne (Richard Coles) } else if (hdr->cmsg_type == SCM_CREDENTIALS) { 23846d4c2bc3267f3f028f39e7e311b0f89aba2e4fdTorne (Richard Coles) DCHECK_EQ(-1, crashing_pid); 23946d4c2bc3267f3f028f39e7e311b0f89aba2e4fdTorne (Richard Coles) const struct ucred *cred = 24046d4c2bc3267f3f028f39e7e311b0f89aba2e4fdTorne (Richard Coles) reinterpret_cast<struct ucred*>(CMSG_DATA(hdr)); 24146d4c2bc3267f3f028f39e7e311b0f89aba2e4fdTorne (Richard Coles) crashing_pid = cred->pid; 24246d4c2bc3267f3f028f39e7e311b0f89aba2e4fdTorne (Richard Coles) } 24346d4c2bc3267f3f028f39e7e311b0f89aba2e4fdTorne (Richard Coles) } 24446d4c2bc3267f3f028f39e7e311b0f89aba2e4fdTorne (Richard Coles) } 2455821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 24646d4c2bc3267f3f028f39e7e311b0f89aba2e4fdTorne (Richard Coles) if (bad_message) { 2475821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) LOG(ERROR) << "Received death signal message with the wrong size;" 2485821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) << " msg.msg_controllen:" << msg.msg_controllen 2495821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) << " msg.msg_flags:" << msg.msg_flags 2505821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) << " kCrashContextSize:" << kCrashContextSize 2515821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) << " kControlMsgSize:" << kControlMsgSize; 2525821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) return; 2535821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) } 25446d4c2bc3267f3f028f39e7e311b0f89aba2e4fdTorne (Richard Coles) if (crashing_pid == -1 || !signal_fd.is_valid()) { 2555821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) LOG(ERROR) << "Death signal message didn't contain all expected control" 2565821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) << " messages"; 2575821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) return; 2585821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) } 2595821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 2605821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) // The crashing TID set inside the compromised context via 2615821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) // sys_gettid() in ExceptionHandler::HandleSignal might be wrong (if 2625821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) // the kernel supports PID namespacing) and may need to be 2635821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) // translated. 2645821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) // 2655821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) // We expect the crashing thread to be in sys_read(), waiting for us to 2665821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) // write to |signal_fd|. Most newer kernels where we have the different pid 2675821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) // namespaces also have /proc/[pid]/syscall, so we can look through 2685821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) // |actual_crashing_pid|'s thread group and find the thread that's in the 2695821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) // read syscall with the right arguments. 2705821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 2715821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) std::string expected_syscall_data; 2725821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) // /proc/[pid]/syscall is formatted as follows: 2735821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) // syscall_number arg1 ... arg6 sp pc 2745821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) // but we just check syscall_number through arg3. 2755821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) base::StringAppendF(&expected_syscall_data, "%d 0x%x %p 0x1 ", 2765821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) SYS_read, tid_fd, tid_buf_addr); 2775821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) bool syscall_supported = false; 2785821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) pid_t crashing_tid = 2795821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) base::FindThreadIDWithSyscall(crashing_pid, 2805821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) expected_syscall_data, 2815821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) &syscall_supported); 2825821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) if (crashing_tid == -1) { 2835821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) // We didn't find the thread we want. Maybe it didn't reach 2845821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) // sys_read() yet or the thread went away. We'll just take a 2855821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) // guess here and assume the crashing thread is the thread group 2865821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) // leader. If procfs syscall is not supported by the kernel, then 2875821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) // we assume the kernel also does not support TID namespacing and 2885821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) // trust the TID passed by the crashing process. 2895821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) LOG(WARNING) << "Could not translate tid - assuming crashing thread is " 2905821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) "thread group leader; syscall_supported=" << syscall_supported; 2915821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) crashing_tid = crashing_pid; 2925821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) } 2935821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 2945821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) ExceptionHandler::CrashContext* bad_context = 295cedac228d2dd51db4b79ea1e72c7f249408ee061Torne (Richard Coles) reinterpret_cast<ExceptionHandler::CrashContext*>(crash_context.get()); 2965821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) bad_context->tid = crashing_tid; 2975821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 298cedac228d2dd51db4b79ea1e72c7f249408ee061Torne (Richard Coles) scoped_ptr<BreakpadInfo> info(new BreakpadInfo); 2995821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 3005821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) info->fd = -1; 3015821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) info->process_type_length = process_type_.length(); 302cedac228d2dd51db4b79ea1e72c7f249408ee061Torne (Richard Coles) // Freed in CrashDumpTask(). 3035821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) char* process_type_str = new char[info->process_type_length + 1]; 3045821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) process_type_.copy(process_type_str, info->process_type_length); 3055821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) process_type_str[info->process_type_length] = '\0'; 3065821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) info->process_type = process_type_str; 3075821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 308cedac228d2dd51db4b79ea1e72c7f249408ee061Torne (Richard Coles) // Memory released from scoped_ptrs below are also freed in CrashDumpTask(). 309cedac228d2dd51db4b79ea1e72c7f249408ee061Torne (Richard Coles) info->crash_keys = crash_keys.release(); 310cedac228d2dd51db4b79ea1e72c7f249408ee061Torne (Richard Coles)#if defined(ADDRESS_SANITIZER) 311cedac228d2dd51db4b79ea1e72c7f249408ee061Torne (Richard Coles) asan_report[kMaxAsanReportSize] = '\0'; 312cedac228d2dd51db4b79ea1e72c7f249408ee061Torne (Richard Coles) info->asan_report_str = asan_report.release(); 313cedac228d2dd51db4b79ea1e72c7f249408ee061Torne (Richard Coles) info->asan_report_length = strlen(info->asan_report_str); 314cedac228d2dd51db4b79ea1e72c7f249408ee061Torne (Richard Coles)#endif 315cedac228d2dd51db4b79ea1e72c7f249408ee061Torne (Richard Coles) 316cedac228d2dd51db4b79ea1e72c7f249408ee061Torne (Richard Coles) info->process_start_time = uptime; 317cedac228d2dd51db4b79ea1e72c7f249408ee061Torne (Richard Coles) info->oom_size = oom_size; 3185821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)#if defined(OS_ANDROID) 3195821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) // Nothing gets uploaded in android. 3205821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) info->upload = false; 3215821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)#else 3228bcbed890bc3ce4d7a057a8f32cab53fa534672eTorne (Richard Coles) info->upload = upload_; 3235821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)#endif 3245821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 3255821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 3264e180b6a0b4720a9b8e9e959a882386f690f08ffTorne (Richard Coles) BrowserThread::GetBlockingPool()->PostSequencedWorkerTask( 3274e180b6a0b4720a9b8e9e959a882386f690f08ffTorne (Richard Coles) worker_pool_token_, 3284e180b6a0b4720a9b8e9e959a882386f690f08ffTorne (Richard Coles) FROM_HERE, 3295821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) base::Bind(&CrashHandlerHostLinux::WriteDumpFile, 3305821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) base::Unretained(this), 331cedac228d2dd51db4b79ea1e72c7f249408ee061Torne (Richard Coles) base::Passed(&info), 332cedac228d2dd51db4b79ea1e72c7f249408ee061Torne (Richard Coles) base::Passed(&crash_context), 3335821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) crashing_pid, 33446d4c2bc3267f3f028f39e7e311b0f89aba2e4fdTorne (Richard Coles) signal_fd.release())); 3355821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)} 3365821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 337cedac228d2dd51db4b79ea1e72c7f249408ee061Torne (Richard Coles)void CrashHandlerHostLinux::WriteDumpFile(scoped_ptr<BreakpadInfo> info, 338cedac228d2dd51db4b79ea1e72c7f249408ee061Torne (Richard Coles) scoped_ptr<char[]> crash_context, 3395821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) pid_t crashing_pid, 3405821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) int signal_fd) { 3414e180b6a0b4720a9b8e9e959a882386f690f08ffTorne (Richard Coles) DCHECK(BrowserThread::GetBlockingPool()->IsRunningSequenceOnCurrentThread( 3424e180b6a0b4720a9b8e9e959a882386f690f08ffTorne (Richard Coles) worker_pool_token_)); 3435821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 344cedac228d2dd51db4b79ea1e72c7f249408ee061Torne (Richard Coles) // Set |info->distro| here because base::GetLinuxDistro() needs to run on a 345cedac228d2dd51db4b79ea1e72c7f249408ee061Torne (Richard Coles) // blocking thread. 346cedac228d2dd51db4b79ea1e72c7f249408ee061Torne (Richard Coles) std::string distro = base::GetLinuxDistro(); 347cedac228d2dd51db4b79ea1e72c7f249408ee061Torne (Richard Coles) info->distro_length = distro.length(); 348cedac228d2dd51db4b79ea1e72c7f249408ee061Torne (Richard Coles) // Freed in CrashDumpTask(). 349cedac228d2dd51db4b79ea1e72c7f249408ee061Torne (Richard Coles) char* distro_str = new char[info->distro_length + 1]; 350cedac228d2dd51db4b79ea1e72c7f249408ee061Torne (Richard Coles) distro.copy(distro_str, info->distro_length); 351cedac228d2dd51db4b79ea1e72c7f249408ee061Torne (Richard Coles) distro_str[info->distro_length] = '\0'; 352cedac228d2dd51db4b79ea1e72c7f249408ee061Torne (Richard Coles) info->distro = distro_str; 353cedac228d2dd51db4b79ea1e72c7f249408ee061Torne (Richard Coles) 3542a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles) base::FilePath dumps_path("/tmp"); 3555821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) PathService::Get(base::DIR_TEMP, &dumps_path); 3565821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) if (!info->upload) 3578bcbed890bc3ce4d7a057a8f32cab53fa534672eTorne (Richard Coles) dumps_path = dumps_path_; 3585821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) const std::string minidump_filename = 3595821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) base::StringPrintf("%s/chromium-%s-minidump-%016" PRIx64 ".dmp", 3605821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) dumps_path.value().c_str(), 3615821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) process_type_.c_str(), 362cedac228d2dd51db4b79ea1e72c7f249408ee061Torne (Richard Coles) base::RandUint64()); 3635821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 3645821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) if (!google_breakpad::WriteMinidump(minidump_filename.c_str(), 3652a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles) kMaxMinidumpFileSize, 366cedac228d2dd51db4b79ea1e72c7f249408ee061Torne (Richard Coles) crashing_pid, 367cedac228d2dd51db4b79ea1e72c7f249408ee061Torne (Richard Coles) crash_context.get(), 3682a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles) kCrashContextSize, 3692a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles) google_breakpad::MappingList(), 3702a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles) google_breakpad::AppMemoryList())) { 3715821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) LOG(ERROR) << "Failed to write crash dump for pid " << crashing_pid; 3725821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) } 3735821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)#if defined(ADDRESS_SANITIZER) 3745821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) // Create a temporary file holding the AddressSanitizer report. 375cedac228d2dd51db4b79ea1e72c7f249408ee061Torne (Richard Coles) const base::FilePath log_path = 376cedac228d2dd51db4b79ea1e72c7f249408ee061Torne (Richard Coles) base::FilePath(minidump_filename).ReplaceExtension("log"); 377cedac228d2dd51db4b79ea1e72c7f249408ee061Torne (Richard Coles) base::WriteFile(log_path, info->asan_report_str, info->asan_report_length); 3785821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)#endif 3795821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 380cedac228d2dd51db4b79ea1e72c7f249408ee061Torne (Richard Coles) // Freed in CrashDumpTask(). 3815821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) char* minidump_filename_str = new char[minidump_filename.length() + 1]; 3825821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) minidump_filename.copy(minidump_filename_str, minidump_filename.length()); 3835821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) minidump_filename_str[minidump_filename.length()] = '\0'; 3845821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) info->filename = minidump_filename_str; 3855821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)#if defined(ADDRESS_SANITIZER) 386cedac228d2dd51db4b79ea1e72c7f249408ee061Torne (Richard Coles) // Freed in CrashDumpTask(). 3875821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) char* minidump_log_filename_str = new char[minidump_filename.length() + 1]; 3885821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) minidump_filename.copy(minidump_log_filename_str, minidump_filename.length()); 3895821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) memcpy(minidump_log_filename_str + minidump_filename.length() - 3, "log", 3); 3905821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) minidump_log_filename_str[minidump_filename.length()] = '\0'; 3915821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) info->log_filename = minidump_log_filename_str; 3925821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)#endif 3935821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) info->pid = crashing_pid; 3945821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 3955821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) BrowserThread::PostTask( 3965821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) BrowserThread::IO, FROM_HERE, 3975821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) base::Bind(&CrashHandlerHostLinux::QueueCrashDumpTask, 3985821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) base::Unretained(this), 399cedac228d2dd51db4b79ea1e72c7f249408ee061Torne (Richard Coles) base::Passed(&info), 4005821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) signal_fd)); 4015821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)} 4025821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 403cedac228d2dd51db4b79ea1e72c7f249408ee061Torne (Richard Coles)void CrashHandlerHostLinux::QueueCrashDumpTask(scoped_ptr<BreakpadInfo> info, 4045821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) int signal_fd) { 4055821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) DCHECK(BrowserThread::CurrentlyOn(BrowserThread::IO)); 4065821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 4075821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) // Send the done signal to the process: it can exit now. 4085821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) struct msghdr msg = {0}; 4095821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) struct iovec done_iov; 4105821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) done_iov.iov_base = const_cast<char*>("\x42"); 4115821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) done_iov.iov_len = 1; 4125821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) msg.msg_iov = &done_iov; 4135821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) msg.msg_iovlen = 1; 4145821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 415cedac228d2dd51db4b79ea1e72c7f249408ee061Torne (Richard Coles) HANDLE_EINTR(sendmsg(signal_fd, &msg, MSG_DONTWAIT | MSG_NOSIGNAL)); 416a3f6a49ab37290eeeb8db0f41ec0f1cb74a68be7Torne (Richard Coles) close(signal_fd); 4175821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 4185821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) uploader_thread_->message_loop()->PostTask( 4195821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) FROM_HERE, 420cedac228d2dd51db4b79ea1e72c7f249408ee061Torne (Richard Coles) base::Bind(&CrashDumpTask, base::Unretained(this), base::Passed(&info))); 4215821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)} 4225821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 4235821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)void CrashHandlerHostLinux::WillDestroyCurrentMessageLoop() { 4245821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) file_descriptor_watcher_.StopWatchingFileDescriptor(); 4255821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 4265821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) // If we are quitting and there are crash dumps in the queue, turn them into 4275821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) // no-ops. 4285821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) shutting_down_ = true; 4295821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) uploader_thread_->Stop(); 4305821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)} 4315821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 4325821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)bool CrashHandlerHostLinux::IsShuttingDown() const { 4335821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) return shutting_down_; 4345821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)} 4355821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 4368bcbed890bc3ce4d7a057a8f32cab53fa534672eTorne (Richard Coles)} // namespace breakpad 437