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Starting with Android Q, Bionic's linker will support loading executables from an APK, replacing the /system/bin/app_process workaround. libhandler_trampoline.so is a small executable, which `dlopen()`s the handler code from another native library allowing de-duplicating shared code with that library without having that library available for a more direct link time dependency. Bug: 928422 Change-Id: Ib126b8fca6005a34b9e4ef103eb1383dc0c554ea Reviewed-on: https://chromium-review.googlesource.com/c/1477336 Reviewed-by: Mark Mentovai <mark@chromium.org> Commit-Queue: Joshua Peraza <jperaza@chromium.org>
46 lines
1.5 KiB
C++
46 lines
1.5 KiB
C++
// Copyright 2019 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 <android/log.h>
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#include <dlfcn.h>
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#include <stdlib.h>
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// The first argument passed to the trampoline is the name of the native library
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// exporting the symbol `CrashpadHandlerMain`. The remaining arguments are the
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// same as for `HandlerMain()`.
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int main(int argc, char* argv[]) {
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static constexpr char kTag[] = "crashpad";
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if (argc < 2) {
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__android_log_print(ANDROID_LOG_FATAL, kTag, "usage: %s <path>", argv[0]);
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return EXIT_FAILURE;
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}
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void* handle = dlopen(argv[1], RTLD_LAZY | RTLD_GLOBAL);
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if (!handle) {
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__android_log_print(ANDROID_LOG_FATAL, kTag, "dlopen: %s", dlerror());
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return EXIT_FAILURE;
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}
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using MainType = int (*)(int, char*[]);
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MainType crashpad_main =
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reinterpret_cast<MainType>(dlsym(handle, "CrashpadHandlerMain"));
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if (!crashpad_main) {
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__android_log_print(ANDROID_LOG_FATAL, kTag, "dlsym: %s", dlerror());
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return EXIT_FAILURE;
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}
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return crashpad_main(argc - 1, argv + 1);
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}
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