Reviewed By: da319 Differential Revision: D9042172 fbshipit-source-id: a7052e061master
Nikos Gorogiannis
6 years ago
committed by
Facebook Github Bot
parent
5b3bca5562
commit
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# Copyright (c) 2018-present, Facebook, Inc.
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#
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# This source code is licensed under the MIT license found in the
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# LICENSE file in the root directory of this source tree.
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TESTS_DIR = ../../..
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ANALYZER = checkers
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# see explanations in cpp/errors/Makefile for the custom isystem
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CLANG_OPTIONS = -x c++ -std=c++11 -nostdinc++ -isystem$(ROOT_DIR) -isystem$(CLANG_INCLUDES)/c++/v1/ -c
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INFER_OPTIONS = --starvation-only --debug-exceptions --project-root $(TESTS_DIR)
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INFERPRINT_OPTIONS = --issues-tests
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SOURCES = $(wildcard *.cpp)
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include $(TESTS_DIR)/clang.make
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infer-out/report.json: $(MAKEFILE_LIST)
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/*
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* Copyright (c) 2018-present, Facebook, Inc.
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*
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* This source code is licensed under the MIT license found in the
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* LICENSE file in the root directory of this source tree.
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*/
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#include <mutex>
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namespace basics {
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class Basic {
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public:
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Basic() {}
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void thread1() {
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mutex_1.lock();
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mutex_2.lock();
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mutex_2.unlock();
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mutex_1.unlock();
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}
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void thread2() {
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mutex_2.lock();
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mutex_1.lock();
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mutex_1.unlock();
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mutex_2.unlock();
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}
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private:
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std::mutex mutex_1;
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std::mutex mutex_2;
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};
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class WithGuard {
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public:
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WithGuard() {}
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void thread1() {
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std::lock_guard<std::mutex> lock1(mutex_1);
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std::lock_guard<std::mutex> lock2(mutex_2);
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}
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void thread2() {
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std::lock_guard<std::mutex> lock2(mutex_2);
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std::lock_guard<std::mutex> lock1(mutex_1);
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}
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private:
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std::mutex mutex_1;
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std::mutex mutex_2;
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};
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class StdLock {
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public:
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StdLock() {}
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// no reports, std::lock magically avoids deadlocks
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void thread1() {
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std::lock<std::mutex>(mutex_1, mutex_2);
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mutex_1.unlock();
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mutex_2.unlock();
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}
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void thread2() {
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std::lock<std::mutex>(mutex_2, mutex_1);
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mutex_2.unlock();
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mutex_1.unlock();
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}
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private:
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std::mutex mutex_1;
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std::mutex mutex_2;
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};
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} // namespace basics
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@ -0,0 +1,2 @@
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codetoanalyze/cpp/starvation/basics.cpp, basics::Basic_thread1, 17, DEADLOCK, no_bucket, ERROR, [[Trace 1] `basics::Basic_thread1`,locks `this.mutex_1` in class `basics::Basic*`,locks `this.mutex_2` in class `basics::Basic*`,[Trace 2] `basics::Basic_thread2`,locks `this.mutex_2` in class `basics::Basic*`,locks `this.mutex_1` in class `basics::Basic*`]
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codetoanalyze/cpp/starvation/basics.cpp, basics::WithGuard_thread1, 42, DEADLOCK, no_bucket, ERROR, [[Trace 1] `basics::WithGuard_thread1`,locks `this.mutex_1` in class `basics::WithGuard*`,locks `this.mutex_2` in class `basics::WithGuard*`,[Trace 2] `basics::WithGuard_thread2`,locks `this.mutex_2` in class `basics::WithGuard*`,locks `this.mutex_1` in class `basics::WithGuard*`]
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