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// Copyright (c) 2008, Google Inc.
// All rights reserved.
//
// Redistribution and use in source and binary forms, with or without
// modification, are permitted provided that the following conditions are
// met:
//
// * Redistributions of source code must retain the above copyright
// notice, this list of conditions and the following disclaimer.
// * Redistributions in binary form must reproduce the above
// copyright notice, this list of conditions and the following disclaimer
// in the documentation and/or other materials provided with the
// distribution.
// * Neither the name of Google Inc. nor the names of its
// contributors may be used to endorse or promote products derived from
// this software without specific prior written permission.
//
// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
#include "client/windows/crash_generation/client_info.h"
#include "client/windows/common/ipc_protocol.h"
static const wchar_t kCustomInfoProcessUptimeName[] = L"ptime";
static const size_t kMaxCustomInfoEntries = 4096;
namespace google_breakpad {
ClientInfo::ClientInfo(CrashGenerationServer* crash_server,
DWORD pid,
MINIDUMP_TYPE dump_type,
DWORD* thread_id,
EXCEPTION_POINTERS** ex_info,
MDRawAssertionInfo* assert_info,
const CustomClientInfo& custom_client_info)
: crash_server_(crash_server),
pid_(pid),
dump_type_(dump_type),
ex_info_(ex_info),
assert_info_(assert_info),
custom_client_info_(custom_client_info),
thread_id_(thread_id),
process_handle_(NULL),
dump_requested_handle_(NULL),
dump_generated_handle_(NULL),
dump_request_wait_handle_(NULL),
process_exit_wait_handle_(NULL),
crash_id_(NULL) {
GetSystemTimeAsFileTime(&start_time_);
}
bool ClientInfo::Initialize() {
process_handle_ = OpenProcess(GENERIC_ALL, FALSE, pid_);
if (!process_handle_) {
return false;
}
// The crash_id will be the low order word of the process creation time.
FILETIME creation_time, exit_time, kernel_time, user_time;
if (GetProcessTimes(process_handle_, &creation_time, &exit_time,
&kernel_time, &user_time))
crash_id_ = creation_time.dwLowDateTime;
dump_requested_handle_ = CreateEvent(NULL, // Security attributes.
TRUE, // Manual reset.
FALSE, // Initial state.
NULL); // Name.
if (!dump_requested_handle_) {
return false;
}
dump_generated_handle_ = CreateEvent(NULL, // Security attributes.
TRUE, // Manual reset.
FALSE, // Initial state.
NULL); // Name.
return dump_generated_handle_ != NULL;
}
void ClientInfo::UnregisterDumpRequestWaitAndBlockUntilNoPending() {
if (dump_request_wait_handle_) {
// Wait for callbacks that might already be running to finish.
UnregisterWaitEx(dump_request_wait_handle_, INVALID_HANDLE_VALUE);
dump_request_wait_handle_ = NULL;
}
}
void ClientInfo::UnregisterProcessExitWait(bool block_until_no_pending) {
if (process_exit_wait_handle_) {
if (block_until_no_pending) {
// Wait for the callback that might already be running to finish.
UnregisterWaitEx(process_exit_wait_handle_, INVALID_HANDLE_VALUE);
} else {
UnregisterWait(process_exit_wait_handle_);
}
process_exit_wait_handle_ = NULL;
}
}
ClientInfo::~ClientInfo() {
// Waiting for the callback to finish here is safe because ClientInfo's are
// never destroyed from the dump request handling callback.
UnregisterDumpRequestWaitAndBlockUntilNoPending();
// This is a little tricky because ClientInfo's may be destroyed by the same
// callback (OnClientEnd) and waiting for it to finish will cause a deadlock.
// Regardless of this complication, wait for any running callbacks to finish
// so that the common case is properly handled. In order to avoid deadlocks,
// the OnClientEnd callback must call UnregisterProcessExitWait(false)
// before deleting the ClientInfo.
UnregisterProcessExitWait(true);
if (process_handle_) {
CloseHandle(process_handle_);
}
if (dump_requested_handle_) {
CloseHandle(dump_requested_handle_);
}
if (dump_generated_handle_) {
CloseHandle(dump_generated_handle_);
}
}
bool ClientInfo::GetClientExceptionInfo(EXCEPTION_POINTERS** ex_info) const {
SIZE_T bytes_count = 0;
if (!ReadProcessMemory(process_handle_,
ex_info_,
ex_info,
sizeof(*ex_info),
&bytes_count)) {
return false;
}
return bytes_count == sizeof(*ex_info);
}
bool ClientInfo::GetClientThreadId(DWORD* thread_id) const {
SIZE_T bytes_count = 0;
if (!ReadProcessMemory(process_handle_,
thread_id_,
thread_id,
sizeof(*thread_id),
&bytes_count)) {
return false;
}
return bytes_count == sizeof(*thread_id);
}
void ClientInfo::SetProcessUptime() {
FILETIME now = {0};
GetSystemTimeAsFileTime(&now);
ULARGE_INTEGER time_start;
time_start.HighPart = start_time_.dwHighDateTime;
time_start.LowPart = start_time_.dwLowDateTime;
ULARGE_INTEGER time_now;
time_now.HighPart = now.dwHighDateTime;
time_now.LowPart = now.dwLowDateTime;
// Calculate the delay and convert it from 100-nanoseconds to milliseconds.
__int64 delay = (time_now.QuadPart - time_start.QuadPart) / 10 / 1000;
// Convert it to a string.
wchar_t* value = custom_info_entries_.get()[custom_client_info_.count].value;
_i64tow_s(delay, value, CustomInfoEntry::kValueMaxLength, 10);
}
bool ClientInfo::PopulateCustomInfo() {
if (custom_client_info_.count > kMaxCustomInfoEntries)
return false;
SIZE_T bytes_count = 0;
SIZE_T read_count = sizeof(CustomInfoEntry) * custom_client_info_.count;
// If the scoped array for custom info already has an array, it will be
// the same size as what we need. This is because the number of custom info
// entries is always the same. So allocate memory only if scoped array has
// a NULL pointer.
if (!custom_info_entries_.get()) {
// Allocate an extra entry for reporting uptime for the client process.
custom_info_entries_.reset(
new CustomInfoEntry[custom_client_info_.count + 1]);
// Use the last element in the array for uptime.
custom_info_entries_.get()[custom_client_info_.count].set_name(
kCustomInfoProcessUptimeName);
}
if (!ReadProcessMemory(process_handle_,
custom_client_info_.entries,
custom_info_entries_.get(),
read_count,
&bytes_count)) {
return false;
}
SetProcessUptime();
return (bytes_count == read_count);
}
CustomClientInfo ClientInfo::GetCustomInfo() const {
CustomClientInfo custom_info;
custom_info.entries = custom_info_entries_.get();
// Add 1 to the count from the client process to account for extra entry for
// process uptime.
custom_info.count = custom_client_info_.count + 1;
return custom_info;
}
} // namespace google_breakpad
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