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This supports the “double handler” or “double handler with low probability” models from https://crashpad.chromium.org/bug/143. For crashpad_handler to be become its own client, it needs access to its own executable path to pass to CrashpadClient::StartHandler(). This was formerly available in the test-only test::Paths::Executable(). Bring that function’s implementation to the non-test Paths::Executable() in util/misc, and rename test::Paths to test::TestPaths to avoid future confusion. test::TestPaths must still be used to access TestDataRoot(), which does not make any sense to non-test code. test::TestPaths::Executable() is retained for use by tests, which most likely prefer the fatal semantics of that function. Paths::Executable() is not fatal because for the purposes of implementing the double handler, a failure to locate the executable path (which may happen on some systems in deeply-nested directory hierarchies) shouldn’t cause the initial crashpad_handler to abort, even if it does prevent a second crashpad_handler from being started. Bug: crashpad:143 Test: crashpad_util_test Paths.*, crashpad_test_test TestPaths.* Change-Id: I9f75bf61839ce51e33c9f7c0d7031cebead6a156 Reviewed-on: https://chromium-review.googlesource.com/466346 Reviewed-by: Scott Graham <scottmg@chromium.org> Commit-Queue: Mark Mentovai <mark@chromium.org>
45 lines
1.3 KiB
C++
45 lines
1.3 KiB
C++
// Copyright 2014 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 "util/misc/paths.h"
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#include <mach-o/dyld.h>
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#include <stdint.h>
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#include "base/logging.h"
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namespace crashpad {
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// static
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bool Paths::Executable(base::FilePath* path) {
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uint32_t executable_length = 0;
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_NSGetExecutablePath(nullptr, &executable_length);
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if (executable_length <= 1) {
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LOG(ERROR) << "_NSGetExecutablePath";
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return false;
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}
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std::string executable_path(executable_length - 1, std::string::value_type());
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int rv = _NSGetExecutablePath(&executable_path[0], &executable_length);
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if (rv != 0) {
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LOG(ERROR) << "_NSGetExecutablePath";
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return false;
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}
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*path = base::FilePath(executable_path);
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return true;
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}
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} // namespace crashpad
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