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// Copyright 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.
#include "components/crash/content/browser/crash_dump_manager_android.h"
#include "base/bind.h"
#include "base/files/file_util.h"
#include "base/format_macros.h"
#include "base/logging.h"
#include "base/posix/global_descriptors.h"
#include "base/process/process.h"
#include "base/rand_util.h"
#include "base/stl_util.h"
#include "base/strings/stringprintf.h"
#include "content/public/browser/browser_thread.h"
#include "content/public/browser/child_process_data.h"
#include "content/public/browser/file_descriptor_info.h"
#include "content/public/browser/notification_service.h"
#include "content/public/browser/notification_types.h"
#include "content/public/browser/render_process_host.h"
using content::BrowserThread;
namespace breakpad {
// static
CrashDumpManager* CrashDumpManager::instance_ = NULL;
// static
CrashDumpManager* CrashDumpManager::GetInstance() {
CHECK(instance_);
return instance_;
}
CrashDumpManager::CrashDumpManager(const base::FilePath& crash_dump_dir)
: crash_dump_dir_(crash_dump_dir) {
DCHECK_CURRENTLY_ON(BrowserThread::UI);
DCHECK(!instance_);
instance_ = this;
notification_registrar_.Add(this,
content::NOTIFICATION_RENDERER_PROCESS_TERMINATED,
content::NotificationService::AllSources());
notification_registrar_.Add(this,
content::NOTIFICATION_RENDERER_PROCESS_CLOSED,
content::NotificationService::AllSources());
BrowserChildProcessObserver::Add(this);
}
CrashDumpManager::~CrashDumpManager() {
instance_ = NULL;
BrowserChildProcessObserver::Remove(this);
}
base::File CrashDumpManager::CreateMinidumpFile(int child_process_id) {
DCHECK_CURRENTLY_ON(BrowserThread::PROCESS_LAUNCHER);
base::FilePath minidump_path;
if (!base::CreateTemporaryFile(&minidump_path))
return base::File();
// We need read permission as the minidump is generated in several phases
// and needs to be read at some point.
int flags = base::File::FLAG_OPEN | base::File::FLAG_READ |
base::File::FLAG_WRITE;
base::File minidump_file(minidump_path, flags);
if (!minidump_file.IsValid()) {
LOG(ERROR) << "Failed to create temporary file, crash won't be reported.";
return base::File();
}
{
base::AutoLock auto_lock(child_process_id_to_minidump_path_lock_);
DCHECK(!ContainsKey(child_process_id_to_minidump_path_, child_process_id));
child_process_id_to_minidump_path_[child_process_id] = minidump_path;
}
return minidump_file.Pass();
}
// static
void CrashDumpManager::ProcessMinidump(const base::FilePath& minidump_path,
base::ProcessHandle pid) {
DCHECK_CURRENTLY_ON(BrowserThread::FILE);
CHECK(instance_);
int64 file_size = 0;
int r = base::GetFileSize(minidump_path, &file_size);
DCHECK(r) << "Failed to retrieve size for minidump "
<< minidump_path.value();
if (file_size == 0) {
// Empty minidump, this process did not crash. Just remove the file.
r = base::DeleteFile(minidump_path, false);
DCHECK(r) << "Failed to delete temporary minidump file "
<< minidump_path.value();
return;
}
// We are dealing with a valid minidump. Copy it to the crash report
// directory from where Java code will upload it later on.
if (instance_->crash_dump_dir_.empty()) {
NOTREACHED() << "Failed to retrieve the crash dump directory.";
return;
}
const uint64 rand = base::RandUint64();
const std::string filename =
base::StringPrintf("chromium-renderer-minidump-%016" PRIx64 ".dmp%d",
rand, pid);
base::FilePath dest_path = instance_->crash_dump_dir_.Append(filename);
r = base::Move(minidump_path, dest_path);
if (!r) {
LOG(ERROR) << "Failed to move crash dump from " << minidump_path.value()
<< " to " << dest_path.value();
base::DeleteFile(minidump_path, false);
return;
}
VLOG(1) << "Crash minidump successfully generated: " <<
instance_->crash_dump_dir_.Append(filename).value();
}
void CrashDumpManager::BrowserChildProcessHostDisconnected(
const content::ChildProcessData& data) {
OnChildExit(data.id, data.handle);
}
void CrashDumpManager::BrowserChildProcessCrashed(
const content::ChildProcessData& data,
int exit_code) {
OnChildExit(data.id, data.handle);
}
void CrashDumpManager::Observe(int type,
const content::NotificationSource& source,
const content::NotificationDetails& details) {
switch (type) {
case content::NOTIFICATION_RENDERER_PROCESS_TERMINATED:
// NOTIFICATION_RENDERER_PROCESS_TERMINATED is sent when the renderer
// process is cleanly shutdown. However, we need to fallthrough so that
// we close the minidump_fd we kept open.
case content::NOTIFICATION_RENDERER_PROCESS_CLOSED: {
content::RenderProcessHost* rph =
content::Source<content::RenderProcessHost>(source).ptr();
OnChildExit(rph->GetID(), rph->GetHandle());
break;
}
default:
NOTREACHED();
return;
}
}
void CrashDumpManager::OnChildExit(int child_process_id,
base::ProcessHandle pid) {
base::FilePath minidump_path;
{
base::AutoLock auto_lock(child_process_id_to_minidump_path_lock_);
ChildProcessIDToMinidumpPath::iterator iter =
child_process_id_to_minidump_path_.find(child_process_id);
if (iter == child_process_id_to_minidump_path_.end()) {
// We might get a NOTIFICATION_RENDERER_PROCESS_TERMINATED and a
// NOTIFICATION_RENDERER_PROCESS_CLOSED.
return;
}
minidump_path = iter->second;
child_process_id_to_minidump_path_.erase(iter);
}
BrowserThread::PostTask(
BrowserThread::FILE, FROM_HERE,
base::Bind(&CrashDumpManager::ProcessMinidump, minidump_path, pid));
}
} // namespace breakpad
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