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5331eb3b9c
This patch allows for handling a failure inside a CrashRecoveryContext in the same way as the global exception/signal handler. A failure will have the same side-effect, such as cleanup of temporarty file, printing callstack, calling relevant signal handlers, and finally returning an exception code. This is an optional feature, disabled by default. This is a support patch for D69825. Differential Revision: https://reviews.llvm.org/D70568
113 lines
3.2 KiB
C++
113 lines
3.2 KiB
C++
//===- llvm/unittest/Support/CrashRecoveryTest.cpp ------------------------===//
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//
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// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
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// See https://llvm.org/LICENSE.txt for license information.
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// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
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//
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//===----------------------------------------------------------------------===//
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#include "llvm/Support/Compiler.h"
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#include "llvm/Support/CrashRecoveryContext.h"
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#include "llvm/Support/FileSystem.h"
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#include "llvm/Support/Signals.h"
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#include "gtest/gtest.h"
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#ifdef _WIN32
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#define WIN32_LEAN_AND_MEAN
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#define NOGDI
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#include <windows.h>
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#endif
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using namespace llvm;
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using namespace llvm::sys;
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static int GlobalInt = 0;
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static void nullDeref() { *(volatile int *)0x10 = 0; }
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static void incrementGlobal() { ++GlobalInt; }
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static void llvmTrap() { LLVM_BUILTIN_TRAP; }
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static void incrementGlobalWithParam(void *) { ++GlobalInt; }
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TEST(CrashRecoveryTest, Basic) {
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llvm::CrashRecoveryContext::Enable();
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GlobalInt = 0;
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EXPECT_TRUE(CrashRecoveryContext().RunSafely(incrementGlobal));
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EXPECT_EQ(1, GlobalInt);
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EXPECT_FALSE(CrashRecoveryContext().RunSafely(nullDeref));
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EXPECT_FALSE(CrashRecoveryContext().RunSafely(llvmTrap));
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}
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struct IncrementGlobalCleanup : CrashRecoveryContextCleanup {
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IncrementGlobalCleanup(CrashRecoveryContext *CRC)
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: CrashRecoveryContextCleanup(CRC) {}
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virtual void recoverResources() { ++GlobalInt; }
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};
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static void noop() {}
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TEST(CrashRecoveryTest, Cleanup) {
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llvm::CrashRecoveryContext::Enable();
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GlobalInt = 0;
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{
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CrashRecoveryContext CRC;
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CRC.registerCleanup(new IncrementGlobalCleanup(&CRC));
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EXPECT_TRUE(CRC.RunSafely(noop));
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} // run cleanups
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EXPECT_EQ(1, GlobalInt);
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GlobalInt = 0;
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{
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CrashRecoveryContext CRC;
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CRC.registerCleanup(new IncrementGlobalCleanup(&CRC));
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EXPECT_FALSE(CRC.RunSafely(nullDeref));
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} // run cleanups
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EXPECT_EQ(1, GlobalInt);
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llvm::CrashRecoveryContext::Disable();
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}
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TEST(CrashRecoveryTest, DumpStackCleanup) {
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SmallString<128> Filename;
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std::error_code EC = sys::fs::createTemporaryFile("crash", "test", Filename);
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EXPECT_FALSE(EC);
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sys::RemoveFileOnSignal(Filename);
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llvm::sys::AddSignalHandler(incrementGlobalWithParam, nullptr);
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GlobalInt = 0;
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llvm::CrashRecoveryContext::Enable();
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{
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CrashRecoveryContext CRC;
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CRC.DumpStackAndCleanupOnFailure = true;
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EXPECT_TRUE(CRC.RunSafely(noop));
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}
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EXPECT_TRUE(sys::fs::exists(Filename));
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EXPECT_EQ(GlobalInt, 0);
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{
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CrashRecoveryContext CRC;
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CRC.DumpStackAndCleanupOnFailure = true;
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EXPECT_FALSE(CRC.RunSafely(nullDeref));
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EXPECT_NE(CRC.RetCode, 0);
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}
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EXPECT_FALSE(sys::fs::exists(Filename));
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EXPECT_EQ(GlobalInt, 1);
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llvm::CrashRecoveryContext::Disable();
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}
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#ifdef _WIN32
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static void raiseIt() {
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RaiseException(123, EXCEPTION_NONCONTINUABLE, 0, NULL);
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}
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TEST(CrashRecoveryTest, RaiseException) {
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llvm::CrashRecoveryContext::Enable();
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EXPECT_FALSE(CrashRecoveryContext().RunSafely(raiseIt));
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}
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static void outputString() {
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OutputDebugStringA("output for debugger\n");
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}
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TEST(CrashRecoveryTest, CallOutputDebugString) {
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llvm::CrashRecoveryContext::Enable();
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EXPECT_TRUE(CrashRecoveryContext().RunSafely(outputString));
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}
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#endif
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