mirror of
https://github.com/catchorg/Catch2.git
synced 2024-11-08 23:29:53 +01:00
245 lines
8.7 KiB
C++
245 lines
8.7 KiB
C++
/*
|
|
* Created by Phil on 21/08/2014
|
|
* Copyright 2014 Two Blue Cubes Ltd. All rights reserved.
|
|
*
|
|
* Distributed under the Boost Software License, Version 1.0. (See accompanying
|
|
* file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt)
|
|
*
|
|
*/
|
|
|
|
/** \file
|
|
* This file provides platform specific implementations of FatalConditionHandler
|
|
*
|
|
* This means that there is a lot of conditional compilation, and platform
|
|
* specific code. Currently, Catch2 supports a dummy handler (if no
|
|
* handler is desired), and 2 platform specific handlers:
|
|
* * Windows' SEH
|
|
* * POSIX signals
|
|
*
|
|
* Consequently, various pieces of code below are compiled if either of
|
|
* the platform specific handlers is enabled, or if none of them are
|
|
* enabled. It is assumed that both cannot be enabled at the same time,
|
|
* and doing so should cause a compilation error.
|
|
*
|
|
* If another platform specific handler is added, the compile guards
|
|
* below will need to be updated taking these assumptions into account.
|
|
*/
|
|
|
|
#include "catch_fatal_condition.h"
|
|
|
|
#include "catch_context.h"
|
|
#include "catch_enforce.h"
|
|
#include "catch_run_context.h"
|
|
#include "catch_windows_h_proxy.h"
|
|
|
|
#include <algorithm>
|
|
|
|
#if !defined( CATCH_CONFIG_WINDOWS_SEH ) && !defined( CATCH_CONFIG_POSIX_SIGNALS )
|
|
|
|
namespace Catch {
|
|
|
|
// If neither SEH nor signal handling is required, the handler impls
|
|
// do not have to do anything, and can be empty.
|
|
void FatalConditionHandler::engage_platform() {}
|
|
void FatalConditionHandler::disengage_platform() {}
|
|
FatalConditionHandler::FatalConditionHandler() = default;
|
|
FatalConditionHandler::~FatalConditionHandler() = default;
|
|
|
|
} // end namespace Catch
|
|
|
|
#endif // !CATCH_CONFIG_WINDOWS_SEH && !CATCH_CONFIG_POSIX_SIGNALS
|
|
|
|
#if defined( CATCH_CONFIG_WINDOWS_SEH ) && defined( CATCH_CONFIG_POSIX_SIGNALS )
|
|
#error "Inconsistent configuration: Windows' SEH handling and POSIX signals cannot be enabled at the same time"
|
|
#endif // CATCH_CONFIG_WINDOWS_SEH && CATCH_CONFIG_POSIX_SIGNALS
|
|
|
|
#if defined( CATCH_CONFIG_WINDOWS_SEH ) || defined( CATCH_CONFIG_POSIX_SIGNALS )
|
|
|
|
namespace {
|
|
//! Signals fatal error message to the run context
|
|
void reportFatal( char const * const message ) {
|
|
Catch::getCurrentContext().getResultCapture()->handleFatalErrorCondition( message );
|
|
}
|
|
|
|
//! Minimal size Catch2 needs for its own fatal error handling.
|
|
//! Picked anecdotally, so it might not be sufficient on all
|
|
//! platforms, and for all configurations.
|
|
constexpr std::size_t minStackSizeForErrors = 32 * 1024;
|
|
} // end unnamed namespace
|
|
|
|
#endif // CATCH_CONFIG_WINDOWS_SEH || CATCH_CONFIG_POSIX_SIGNALS
|
|
|
|
#if defined( CATCH_CONFIG_WINDOWS_SEH )
|
|
|
|
namespace Catch {
|
|
|
|
struct SignalDefs { DWORD id; const char* name; };
|
|
|
|
// There is no 1-1 mapping between signals and windows exceptions.
|
|
// Windows can easily distinguish between SO and SigSegV,
|
|
// but SigInt, SigTerm, etc are handled differently.
|
|
static SignalDefs signalDefs[] = {
|
|
{ static_cast<DWORD>(EXCEPTION_ILLEGAL_INSTRUCTION), "SIGILL - Illegal instruction signal" },
|
|
{ static_cast<DWORD>(EXCEPTION_STACK_OVERFLOW), "SIGSEGV - Stack overflow" },
|
|
{ static_cast<DWORD>(EXCEPTION_ACCESS_VIOLATION), "SIGSEGV - Segmentation violation signal" },
|
|
{ static_cast<DWORD>(EXCEPTION_INT_DIVIDE_BY_ZERO), "Divide by zero error" },
|
|
};
|
|
|
|
static LONG CALLBACK handleVectoredException(PEXCEPTION_POINTERS ExceptionInfo) {
|
|
for (auto const& def : signalDefs) {
|
|
if (ExceptionInfo->ExceptionRecord->ExceptionCode == def.id) {
|
|
reportFatal(def.name);
|
|
}
|
|
}
|
|
// If its not an exception we care about, pass it along.
|
|
// This stops us from eating debugger breaks etc.
|
|
return EXCEPTION_CONTINUE_SEARCH;
|
|
}
|
|
|
|
// Since we do not support multiple instantiations, we put these
|
|
// into global variables and rely on cleaning them up in outlined
|
|
// constructors/destructors
|
|
static PVOID exceptionHandlerHandle = nullptr;
|
|
|
|
|
|
// For MSVC, we reserve part of the stack memory for handling
|
|
// memory overflow structured exception.
|
|
FatalConditionHandler::FatalConditionHandler() {
|
|
ULONG guaranteeSize = static_cast<ULONG>(minStackSizeForErrors);
|
|
if (!SetThreadStackGuarantee(&guaranteeSize)) {
|
|
// We do not want to fully error out, because needing
|
|
// the stack reserve should be rare enough anyway.
|
|
Catch::cerr()
|
|
<< "Failed to reserve piece of stack."
|
|
<< " Stack overflows will not be reported successfully.";
|
|
}
|
|
}
|
|
|
|
// We do not attempt to unset the stack guarantee, because
|
|
// Windows does not support lowering the stack size guarantee.
|
|
FatalConditionHandler::~FatalConditionHandler() = default;
|
|
|
|
|
|
void FatalConditionHandler::engage_platform() {
|
|
// Register as first handler in current chain
|
|
exceptionHandlerHandle = AddVectoredExceptionHandler(1, handleVectoredException);
|
|
if (!exceptionHandlerHandle) {
|
|
CATCH_RUNTIME_ERROR("Could not register vectored exception handler");
|
|
}
|
|
}
|
|
|
|
void FatalConditionHandler::disengage_platform() {
|
|
if (!RemoveVectoredExceptionHandler(exceptionHandlerHandle)) {
|
|
CATCH_RUNTIME_ERROR("Could not unregister vectored exception handler");
|
|
}
|
|
exceptionHandlerHandle = nullptr;
|
|
}
|
|
|
|
} // end namespace Catch
|
|
|
|
#endif // CATCH_CONFIG_WINDOWS_SEH
|
|
|
|
#if defined( CATCH_CONFIG_POSIX_SIGNALS )
|
|
|
|
#include <signal.h>
|
|
|
|
namespace Catch {
|
|
|
|
struct SignalDefs {
|
|
int id;
|
|
const char* name;
|
|
};
|
|
|
|
static SignalDefs signalDefs[] = {
|
|
{ SIGINT, "SIGINT - Terminal interrupt signal" },
|
|
{ SIGILL, "SIGILL - Illegal instruction signal" },
|
|
{ SIGFPE, "SIGFPE - Floating point error signal" },
|
|
{ SIGSEGV, "SIGSEGV - Segmentation violation signal" },
|
|
{ SIGTERM, "SIGTERM - Termination request signal" },
|
|
{ SIGABRT, "SIGABRT - Abort (abnormal termination) signal" }
|
|
};
|
|
|
|
// Older GCCs trigger -Wmissing-field-initializers for T foo = {}
|
|
// which is zero initialization, but not explicit. We want to avoid
|
|
// that.
|
|
#if defined(__GNUC__)
|
|
# pragma GCC diagnostic push
|
|
# pragma GCC diagnostic ignored "-Wmissing-field-initializers"
|
|
#endif
|
|
|
|
static char* altStackMem = nullptr;
|
|
static std::size_t altStackSize = 0;
|
|
static stack_t oldSigStack{};
|
|
static struct sigaction oldSigActions[sizeof(signalDefs) / sizeof(SignalDefs)]{};
|
|
|
|
static void restorePreviousSignalHandlers() {
|
|
// We set signal handlers back to the previous ones. Hopefully
|
|
// nobody overwrote them in the meantime, and doesn't expect
|
|
// their signal handlers to live past ours given that they
|
|
// installed them after ours..
|
|
for (std::size_t i = 0; i < sizeof(signalDefs) / sizeof(SignalDefs); ++i) {
|
|
sigaction(signalDefs[i].id, &oldSigActions[i], nullptr);
|
|
}
|
|
// Return the old stack
|
|
sigaltstack(&oldSigStack, nullptr);
|
|
}
|
|
|
|
static void handleSignal( int sig ) {
|
|
char const * name = "<unknown signal>";
|
|
for (auto const& def : signalDefs) {
|
|
if (sig == def.id) {
|
|
name = def.name;
|
|
break;
|
|
}
|
|
}
|
|
// We need to restore previous signal handlers and let them do
|
|
// their thing, so that the users can have the debugger break
|
|
// when a signal is raised, and so on.
|
|
restorePreviousSignalHandlers();
|
|
reportFatal( name );
|
|
raise( sig );
|
|
}
|
|
|
|
FatalConditionHandler::FatalConditionHandler() {
|
|
assert(!altStackMem && "Cannot initialize POSIX signal handler when one already exists");
|
|
if (altStackSize == 0) {
|
|
altStackSize = std::max(static_cast<size_t>(SIGSTKSZ), minStackSizeForErrors);
|
|
}
|
|
altStackMem = new char[altStackSize]();
|
|
}
|
|
|
|
FatalConditionHandler::~FatalConditionHandler() {
|
|
delete[] altStackMem;
|
|
// We signal that another instance can be constructed by zeroing
|
|
// out the pointer.
|
|
altStackMem = nullptr;
|
|
}
|
|
|
|
void FatalConditionHandler::engage_platform() {
|
|
stack_t sigStack;
|
|
sigStack.ss_sp = altStackMem;
|
|
sigStack.ss_size = altStackSize;
|
|
sigStack.ss_flags = 0;
|
|
sigaltstack(&sigStack, &oldSigStack);
|
|
struct sigaction sa = { };
|
|
|
|
sa.sa_handler = handleSignal;
|
|
sa.sa_flags = SA_ONSTACK;
|
|
for (std::size_t i = 0; i < sizeof(signalDefs)/sizeof(SignalDefs); ++i) {
|
|
sigaction(signalDefs[i].id, &sa, &oldSigActions[i]);
|
|
}
|
|
}
|
|
|
|
#if defined(__GNUC__)
|
|
# pragma GCC diagnostic pop
|
|
#endif
|
|
|
|
|
|
void FatalConditionHandler::disengage_platform() {
|
|
restorePreviousSignalHandlers();
|
|
}
|
|
|
|
} // end namespace Catch
|
|
|
|
#endif // CATCH_CONFIG_POSIX_SIGNALS
|