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Never set any signal handlers.

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Never call setjmp(), longjmp() or strsignal().


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@9014 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Brian Gaeke 2003-10-10 17:03:22 +00:00
parent 58a6faac65
commit 235b200e6b
1 changed files with 2 additions and 37 deletions
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39
lib/ExecutionEngine/Interpreter/Execution.cpp
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@ -13,9 +13,7 @@
#include "llvm/Assembly/Writer.h"
#include "Support/CommandLine.h"
#include "Support/Statistic.h"
#include <math.h> // For fmod
#include <signal.h>
#include <setjmp.h>
#include <cmath> // For fmod
Interpreter *TheEE = 0;
@ -38,27 +36,6 @@ namespace {
//
CachedWriter CW; // Object to accelerate printing of LLVM
sigjmp_buf SignalRecoverBuffer;
static bool InInstruction = false;
extern "C" {
static void SigHandler(int Signal) {
if (InInstruction)
siglongjmp(SignalRecoverBuffer, Signal);
}
}
static void initializeSignalHandlers() {
struct sigaction Action;
Action.sa_handler = SigHandler;
Action.sa_flags = SA_SIGINFO;
sigemptyset(&Action.sa_mask);
sigaction(SIGSEGV, &Action, 0);
sigaction(SIGBUS, &Action, 0);
sigaction(SIGINT, &Action, 0);
sigaction(SIGFPE, &Action, 0);
}
//===----------------------------------------------------------------------===//
// Value Manipulation code
@ -120,7 +97,6 @@ static void SetValue(Value *V, GenericValue Val, ExecutionContext &SF) {
void Interpreter::initializeExecutionEngine() {
TheEE = this;
initializeSignalHandlers();
}
//===----------------------------------------------------------------------===//
@ -681,8 +657,7 @@ GenericValue Interpreter::executeGEPOperation(Value *Ptr, User::op_iterator I,
std::cerr << "Out of range memory access to element #" << Idx
<< " of a " << AT->getNumElements() << " element array."
<< " Subscript #" << *I << "\n";
// Get outta here!!!
siglongjmp(SignalRecoverBuffer, SIGTRAP);
abort();
}
Ty = ST->getElementType();
@ -1006,17 +981,7 @@ void Interpreter::executeInstruction() {
// Track the number of dynamic instructions executed.
++NumDynamicInsts;
// Set a sigsetjmp buffer so that we can recover if an error happens during
// instruction execution...
//
if (int SigNo = sigsetjmp(SignalRecoverBuffer, 1)) {
std::cout << "EXCEPTION OCCURRED [" << strsignal(SigNo) << "]\n";
exit(1);
}
InInstruction = true;
visit(I); // Dispatch to one of the visit* methods...
InInstruction = false;
// Reset the current frame location to the top of stack
CurFrame = ECStack.size()-1;