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147 lines
3.3 KiB
147 lines
3.3 KiB
/*
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* Copyright 2002-2019 Intel Corporation.
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*
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* This software is provided to you as Sample Source Code as defined in the accompanying
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* End User License Agreement for the Intel(R) Software Development Products ("Agreement")
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* section 1.L.
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*
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* This software and the related documents are provided as is, with no express or implied
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* warranties, other than those that are expressly stated in the License.
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*/
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/*! @file
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* Runnable and function objects.
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*/
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#include "runnable.h"
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#if defined(TARGET_WINDOWS)
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#include <windows.h>
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#elif defined(TARGET_LINUX)
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// If __USE_GNU is defined, we don't need to do anything.
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// If we defined it ourselves, we need to undefine it later.
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#ifndef __USE_GNU
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# define __USE_GNU
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# define APP_UNDEF_USE_GNU
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#endif
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#include <ucontext.h>
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// If we defined __USE_GNU ourselves, we need to undefine it here.
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#ifdef APP_UNDEF_USE_GNU
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#undef __USE_GNU
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#undef APP_UNDEF_USE_GNU
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#endif
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#include <unistd.h>
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#include <sys/mman.h>
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#include <signal.h>
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#include <setjmp.h>
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#endif
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//=======================================================================
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// Implementation of the FUNC_OBJ::ExecuteSafe function
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//=======================================================================
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#if defined(TARGET_WINDOWS)
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/*!
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* Given exception context and record, retrieve the exception address.
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*/
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static void * GetExceptIp(LPEXCEPTION_POINTERS exceptPtr)
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{
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#if defined(TARGET_IA32)
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return reinterpret_cast<void *>(exceptPtr->ContextRecord->Eip);
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#elif defined(TARGET_IA32E)
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return reinterpret_cast<void *>(exceptPtr->ContextRecord->Rip);
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#endif
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}
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FUNC_OBJ & FUNC_OBJ::ExecuteSafe()
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{
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void * exceptIp;
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__try
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{
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FUNC_OBJ& obj = Execute();
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return obj;
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}
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__except ((exceptIp = GetExceptIp(GetExceptionInformation())), EXCEPTION_EXECUTE_HANDLER)
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{
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return HandleException(exceptIp);
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}
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}
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#elif defined(TARGET_LINUX)
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static sigjmp_buf jumpBuffer;
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static void * exceptIp;
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/*!
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* Signal handler: stores exception IP in a global variable and returns with siglongjmp.
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*/
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static void HandleSignal(int sig, siginfo_t *i, void *vctxt)
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{
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ucontext_t *ctxt = (ucontext_t *)vctxt;
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#if defined(TARGET_IA32)
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exceptIp = reinterpret_cast<void *>(ctxt->uc_mcontext.gregs[REG_EIP]);
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#elif defined(TARGET_IA32E)
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exceptIp = reinterpret_cast<void *>(ctxt->uc_mcontext.gregs[REG_RIP]);
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#endif
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siglongjmp(jumpBuffer, 1);
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}
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/*!
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* Set up the SIGSEGV signal handler.
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*/
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static bool SetupSignalHandler()
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{
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struct sigaction sigact;
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sigact.sa_sigaction = HandleSignal;
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sigact.sa_flags = SA_SIGINFO;
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sigemptyset(&sigact.sa_mask);
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if (sigaction(SIGSEGV, &sigact, 0) == -1)
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{
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cerr << "Unable to set up handler" << endl;
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return false;
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}
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return true;
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}
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FUNC_OBJ & FUNC_OBJ::ExecuteSafe()
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{
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static bool first = true;
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if (first)
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{
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SetupSignalHandler();
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first = false;
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}
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if (sigsetjmp(jumpBuffer, 1) == 0)
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{
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return Execute();
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}
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else
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{
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return HandleException(exceptIp);
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}
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}
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#else // macOS*
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FUNC_OBJ & FUNC_OBJ::ExecuteSafe()
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{
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// Exception handling is not supported on macOS*
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return Execute();
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}
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#endif
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/* ===================================================================== */
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/* eof */
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/* ===================================================================== */
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