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/*
* Copyright (C) 2016-2017 Apple Inc. All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
*
* THIS SOFTWARE IS PROVIDED BY APPLE INC. ``AS IS'' AND ANY
* EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL APPLE INC. OR
* CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
* EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
* PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
* PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY
* OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/
#include "config.h"
#include "ExceptionScope.h"
#include "ErrorInstance.h"
#include "Exception.h"
#include <wtf/StackTrace.h>
#include <wtf/StringPrintStream.h>
#include <wtf/Threading.h>
namespace JSC {
#if ENABLE(EXCEPTION_SCOPE_VERIFICATION)
ExceptionScope::ExceptionScope(VM& vm, ExceptionEventLocation location)
: m_vm(vm)
, m_previousScope(vm.m_topExceptionScope)
, m_location(location)
, m_recursionDepth(m_previousScope ? m_previousScope->m_recursionDepth + 1 : 0)
{
m_vm.m_topExceptionScope = this;
}
ExceptionScope::~ExceptionScope()
{
RELEASE_ASSERT(m_vm.m_topExceptionScope);
m_vm.m_topExceptionScope = m_previousScope;
}
CString ExceptionScope::unexpectedExceptionMessage()
{
StringPrintStream out;
out.println("Unexpected exception observed on thread ", Thread::current(), " at:");
auto currentStack = StackTrace::captureStackTrace(Options::unexpectedExceptionStackTraceLimit(), 1);
out.print(StackTracePrinter { *currentStack, " " });
if (!m_vm.nativeStackTraceOfLastThrow())
return CString();
out.println("The exception was thrown from thread ", *m_vm.throwingThread(), " at:");
out.print(StackTracePrinter { *m_vm.nativeStackTraceOfLastThrow(), " " });
if (auto* error = jsDynamicCast<ErrorInstance*>(exception()->value()))
out.println("Error Exception: ", error->tryGetMessageForDebugging());
else
out.println("non-Error Exception: ", exception()->value());
return out.toCString();
}
#endif // ENABLE(EXCEPTION_SCOPE_VERIFICATION)
} // namespace JSC
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