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EE/JIT: Do not invoke parent's ctors/dtors from main()! (PR3897)

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On Mingw and Cygwin, the symbol __main is resolved to
callee's(eg. tools/lli) one, to invoke wrong duplicated ctors
(and register wrong callee's dtors with atexit(3)).
We expect, by callee, ExecutionEngine::runStaticConstructorsDestructors()
is called before ExecutionEngine::runFunctionAsMain() is called.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@112474 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
NAKAMURA Takumi 2010-08-30 14:00:29 +00:00
parent 51799ddc7c
commit 37ce5650e6
1 changed files with 12 additions and 0 deletions
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12
lib/ExecutionEngine/JIT/Intercept.cpp
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@ -89,6 +89,10 @@ static int jit_atexit(void (*Fn)()) {
return 0; // Always successful
}
static int jit_noop() {
return 0;
}
//===----------------------------------------------------------------------===//
//
/// getPointerToNamedFunction - This method returns the address of the specified
@ -104,6 +108,14 @@ void *JIT::getPointerToNamedFunction(const std::string &Name,
if (Name == "exit") return (void*)(intptr_t)&jit_exit;
if (Name == "atexit") return (void*)(intptr_t)&jit_atexit;
// We shuold not invoke parent's ctors/dtors from main()! (PR3897)
// On Mingw and Cygwin, the symbol __main is resolved to
// callee's(eg. tools/lli) one, to invoke wrong duplicated ctors
// (and register wrong callee's dtors with atexit(3)).
// We expect ExecutionEngine::runStaticConstructorsDestructors()
// is called before ExecutionEngine::runFunctionAsMain() is called.
if (Name == "__main") return (void*)(intptr_t)&jit_noop;
const char *NameStr = Name.c_str();
// If this is an asm specifier, skip the sentinal.
if (NameStr[0] == 1) ++NameStr;