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c82309f0e5
StartHandler() binds to the default job's exception port, and launches the handler process (normally this is crashpad_handler), passing it the task handle and a handle to the exception port as startup parameters. This follows the protocol used by crashlogger. Additionally, implement ExceptionHandlerServer in crashpad_handler, which contains the exception processing loop. It currently dispatches to an empty CrashReportExceptionHandler where a report will be written eventually. Bug: crashpad:196 Change-Id: Ie27ff6f67adfbcc7d03551ae7e84a885da43df5a Reviewed-on: https://chromium-review.googlesource.com/1043282 Commit-Queue: Scott Graham <scottmg@chromium.org> Reviewed-by: Joshua Peraza <jperaza@chromium.org>
119 lines
4.2 KiB
C++
119 lines
4.2 KiB
C++
// Copyright 2017 The Crashpad Authors. All rights reserved.
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//
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// Licensed under the Apache License, Version 2.0 (the "License");
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// you may not use this file except in compliance with the License.
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// You may obtain a copy of the License at
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//
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// http://www.apache.org/licenses/LICENSE-2.0
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//
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// Unless required by applicable law or agreed to in writing, software
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// distributed under the License is distributed on an "AS IS" BASIS,
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// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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// See the License for the specific language governing permissions and
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// limitations under the License.
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#include "client/crashpad_client.h"
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#include <launchpad/launchpad.h>
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#include <zircon/process.h>
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#include <zircon/processargs.h>
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#include "base/fuchsia/fuchsia_logging.h"
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#include "base/fuchsia/scoped_zx_handle.h"
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#include "base/logging.h"
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#include "base/strings/stringprintf.h"
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#include "client/client_argv_handling.h"
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#include "util/fuchsia/system_exception_port_key.h"
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namespace crashpad {
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CrashpadClient::CrashpadClient() {}
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CrashpadClient::~CrashpadClient() {}
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bool CrashpadClient::StartHandler(
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const base::FilePath& handler,
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const base::FilePath& database,
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const base::FilePath& metrics_dir,
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const std::string& url,
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const std::map<std::string, std::string>& annotations,
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const std::vector<std::string>& arguments,
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bool restartable,
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bool asynchronous_start) {
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DCHECK_EQ(restartable, false); // Not used on Fuchsia.
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DCHECK_EQ(asynchronous_start, false); // Not used on Fuchsia.
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zx_handle_t exception_port_raw;
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zx_status_t status = zx_port_create(0, &exception_port_raw);
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if (status != ZX_OK) {
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ZX_LOG(ERROR, status) << "zx_port_create";
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return false;
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}
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base::ScopedZxHandle exception_port(exception_port_raw);
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status = zx_task_bind_exception_port(
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zx_job_default(), exception_port.get(), kSystemExceptionPortKey, 0);
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if (status != ZX_OK) {
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ZX_LOG(ERROR, status) << "zx_task_bind_exception_port";
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return false;
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}
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std::vector<std::string> argv_strings;
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BuildHandlerArgvStrings(handler,
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database,
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metrics_dir,
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url,
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annotations,
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arguments,
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&argv_strings);
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std::vector<const char*> argv;
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ConvertArgvStrings(argv_strings, &argv);
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// ConvertArgvStrings adds an unnecessary nullptr at the end of the argv list,
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// which causes launchpad_set_args() to hang.
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argv.pop_back();
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launchpad_t* lp;
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launchpad_create(zx_job_default(), argv[0], &lp);
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launchpad_load_from_file(lp, argv[0]);
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launchpad_set_args(lp, argv.size(), &argv[0]);
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// TODO(scottmg): https://crashpad.chromium.org/bug/196, this is useful during
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// bringup, but should probably be made minimal for real usage.
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launchpad_clone(lp,
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LP_CLONE_FDIO_NAMESPACE | LP_CLONE_FDIO_STDIO |
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LP_CLONE_ENVIRON | LP_CLONE_DEFAULT_JOB);
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// Follow the same protocol as devmgr and crashlogger in Zircon (that is,
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// process handle as handle 0, with type USER0, exception port handle as
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// handle 1, also with type PA_USER0) so that it's trivial to replace
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// crashlogger with crashpad_handler. The exception port is passed on, so
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// released here. Currently it is assumed that this process's default job
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// handle is the exception port that should be monitored. In the future, it
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// might be useful for this to be configurable by the client.
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zx_handle_t handles[] = {ZX_HANDLE_INVALID, ZX_HANDLE_INVALID};
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status =
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zx_handle_duplicate(zx_job_default(), ZX_RIGHT_SAME_RIGHTS, &handles[0]);
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if (status != ZX_OK) {
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ZX_LOG(ERROR, status) << "zx_handle_duplicate";
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return false;
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}
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handles[1] = exception_port.release();
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uint32_t handle_types[] = {PA_HND(PA_USER0, 0), PA_HND(PA_USER0, 1)};
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launchpad_add_handles(lp, arraysize(handles), handles, handle_types);
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const char* error_message;
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zx_handle_t child_raw;
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status = launchpad_go(lp, &child_raw, &error_message);
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base::ScopedZxHandle child(child_raw);
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if (status != ZX_OK) {
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ZX_LOG(ERROR, status) << "launchpad_go: " << error_message;
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return false;
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}
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return true;
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}
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} // namespace crashpad
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