CrashRecoveryTest.cpp
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//===- llvm/unittest/Support/CrashRecoveryTest.cpp ------------------------===//
//
// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
// See https://llvm.org/LICENSE.txt for license information.
// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
//
//===----------------------------------------------------------------------===//
#include "llvm/Support/Compiler.h"
#include "llvm/Support/CrashRecoveryContext.h"
#include "llvm/Support/FileSystem.h"
#include "llvm/Support/Signals.h"
#include "gtest/gtest.h"
#ifdef _WIN32
#define WIN32_LEAN_AND_MEAN
#define NOGDI
#include <windows.h>
#endif
using namespace llvm;
using namespace llvm::sys;
static int GlobalInt = 0;
static void nullDeref() { *(volatile int *)0x10 = 0; }
static void incrementGlobal() { ++GlobalInt; }
static void llvmTrap() { LLVM_BUILTIN_TRAP; }
static void incrementGlobalWithParam(void *) { ++GlobalInt; }
TEST(CrashRecoveryTest, Basic) {
llvm::CrashRecoveryContext::Enable();
GlobalInt = 0;
EXPECT_TRUE(CrashRecoveryContext().RunSafely(incrementGlobal));
EXPECT_EQ(1, GlobalInt);
EXPECT_FALSE(CrashRecoveryContext().RunSafely(nullDeref));
EXPECT_FALSE(CrashRecoveryContext().RunSafely(llvmTrap));
}
struct IncrementGlobalCleanup : CrashRecoveryContextCleanup {
IncrementGlobalCleanup(CrashRecoveryContext *CRC)
: CrashRecoveryContextCleanup(CRC) {}
virtual void recoverResources() { ++GlobalInt; }
};
static void noop() {}
TEST(CrashRecoveryTest, Cleanup) {
llvm::CrashRecoveryContext::Enable();
GlobalInt = 0;
{
CrashRecoveryContext CRC;
CRC.registerCleanup(new IncrementGlobalCleanup(&CRC));
EXPECT_TRUE(CRC.RunSafely(noop));
} // run cleanups
EXPECT_EQ(1, GlobalInt);
GlobalInt = 0;
{
CrashRecoveryContext CRC;
CRC.registerCleanup(new IncrementGlobalCleanup(&CRC));
EXPECT_FALSE(CRC.RunSafely(nullDeref));
} // run cleanups
EXPECT_EQ(1, GlobalInt);
llvm::CrashRecoveryContext::Disable();
}
TEST(CrashRecoveryTest, DumpStackCleanup) {
SmallString<128> Filename;
std::error_code EC = sys::fs::createTemporaryFile("crash", "test", Filename);
EXPECT_FALSE(EC);
sys::RemoveFileOnSignal(Filename);
llvm::sys::AddSignalHandler(incrementGlobalWithParam, nullptr);
GlobalInt = 0;
llvm::CrashRecoveryContext::Enable();
{
CrashRecoveryContext CRC;
CRC.DumpStackAndCleanupOnFailure = true;
EXPECT_TRUE(CRC.RunSafely(noop));
}
EXPECT_TRUE(sys::fs::exists(Filename));
EXPECT_EQ(GlobalInt, 0);
{
CrashRecoveryContext CRC;
CRC.DumpStackAndCleanupOnFailure = true;
EXPECT_FALSE(CRC.RunSafely(nullDeref));
EXPECT_NE(CRC.RetCode, 0);
}
EXPECT_FALSE(sys::fs::exists(Filename));
EXPECT_EQ(GlobalInt, 1);
llvm::CrashRecoveryContext::Disable();
}
#ifdef _WIN32
static void raiseIt() {
RaiseException(123, EXCEPTION_NONCONTINUABLE, 0, NULL);
}
TEST(CrashRecoveryTest, RaiseException) {
llvm::CrashRecoveryContext::Enable();
EXPECT_FALSE(CrashRecoveryContext().RunSafely(raiseIt));
}
static void outputString() {
OutputDebugStringA("output for debugger\n");
}
TEST(CrashRecoveryTest, CallOutputDebugString) {
llvm::CrashRecoveryContext::Enable();
EXPECT_TRUE(CrashRecoveryContext().RunSafely(outputString));
}
#endif