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6a9e2e6003
This CL rolls mini_chromium to pick up the move of a bunch of files to base/apple, and makes changes to adjust. Bug: chromium:1444927 Change-Id: Ib692e2a1628e2c0c8228795eaecdb7f35b1c09fa Reviewed-on: https://chromium-review.googlesource.com/c/crashpad/crashpad/+/4786387 Reviewed-by: Mark Mentovai <mark@chromium.org> Commit-Queue: Avi Drissman <avi@chromium.org>
110 lines
4.0 KiB
C++
110 lines
4.0 KiB
C++
// Copyright 2020 The Crashpad Authors
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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 "util/mach/bootstrap.h"
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#include <mach/mach.h>
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#include <servers/bootstrap.h>
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#include "base/apple/mach_logging.h"
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namespace {
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// This forms the internal implementation for BootstrapCheckIn() and
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// BootstrapLookUp(), which follow the same logic aside from the routine called
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// and the right type returned.
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struct BootstrapCheckInTraits {
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using Type = base::apple::ScopedMachReceiveRight;
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static kern_return_t Call(mach_port_t bootstrap_port,
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const char* service_name,
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mach_port_t* service_port) {
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return bootstrap_check_in(bootstrap_port, service_name, service_port);
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}
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static constexpr char kName[] = "bootstrap_check_in";
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};
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constexpr char BootstrapCheckInTraits::kName[];
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struct BootstrapLookUpTraits {
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using Type = base::apple::ScopedMachSendRight;
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static kern_return_t Call(mach_port_t bootstrap_port,
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const char* service_name,
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mach_port_t* service_port) {
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return bootstrap_look_up(bootstrap_port, service_name, service_port);
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}
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static constexpr char kName[] = "bootstrap_look_up";
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};
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constexpr char BootstrapLookUpTraits::kName[];
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template <typename Traits>
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typename Traits::Type BootstrapCheckInOrLookUp(
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const std::string& service_name) {
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// bootstrap_check_in() and bootstrap_look_up() silently truncate service
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// names longer than BOOTSTRAP_MAX_NAME_LEN. This check ensures that the name
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// will not be truncated.
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if (service_name.size() >= BOOTSTRAP_MAX_NAME_LEN) {
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LOG(ERROR) << Traits::kName << " " << service_name << ": name too long";
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return typename Traits::Type(MACH_PORT_NULL);
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}
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mach_port_t service_port;
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kern_return_t kr =
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Traits::Call(bootstrap_port, service_name.c_str(), &service_port);
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if (kr != BOOTSTRAP_SUCCESS) {
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BOOTSTRAP_LOG(ERROR, kr) << Traits::kName << " " << service_name;
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service_port = MACH_PORT_NULL;
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}
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return typename Traits::Type(service_port);
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}
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} // namespace
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namespace crashpad {
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base::apple::ScopedMachReceiveRight BootstrapCheckIn(
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const std::string& service_name) {
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return BootstrapCheckInOrLookUp<BootstrapCheckInTraits>(service_name);
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}
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base::apple::ScopedMachSendRight BootstrapLookUp(
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const std::string& service_name) {
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base::apple::ScopedMachSendRight send(
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BootstrapCheckInOrLookUp<BootstrapLookUpTraits>(service_name));
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// It’s possible to race the bootstrap server when the receive right
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// corresponding to the looked-up send right is destroyed immediately before
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// the bootstrap_look_up() call. If the bootstrap server believes that
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// |service_name| is still registered before processing the port-destroyed
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// notification sent to it by the kernel, it will respond to a
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// bootstrap_look_up() request with a send right that has become a dead name,
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// which will be returned to the bootstrap_look_up() caller, translated into
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// the caller’s IPC port name space, as the special MACH_PORT_DEAD port name.
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// Check for that and return MACH_PORT_NULL in its place, as though the
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// bootstrap server had fully processed the port-destroyed notification before
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// responding to bootstrap_look_up().
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if (send.get() == MACH_PORT_DEAD) {
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LOG(ERROR) << "bootstrap_look_up " << service_name << ": service is dead";
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send.reset();
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}
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return send;
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}
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base::apple::ScopedMachSendRight SystemCrashReporterHandler() {
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return BootstrapLookUp("com.apple.ReportCrash");
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}
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} // namespace crashpad
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