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EE/JIT: Do 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, 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
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@ -89,6 +89,10 @@ static int jit_atexit(void (*Fn)()) {
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return 0; // Always successful
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}
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static int jit_noop() {
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return 0;
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}
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//===----------------------------------------------------------------------===//
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//
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/// getPointerToNamedFunction - This method returns the address of the specified
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@ -104,6 +108,14 @@ void *JIT::getPointerToNamedFunction(const std::string &Name,
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if (Name == "exit") return (void*)(intptr_t)&jit_exit;
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if (Name == "atexit") return (void*)(intptr_t)&jit_atexit;
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// We shuold not invoke parent's ctors/dtors from main()! (PR3897)
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// On Mingw and Cygwin, the symbol __main is resolved to
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// callee's(eg. tools/lli) one, to invoke wrong duplicated ctors
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// (and register wrong callee's dtors with atexit(3)).
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// We expect ExecutionEngine::runStaticConstructorsDestructors()
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// is called before ExecutionEngine::runFunctionAsMain() is called.
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if (Name == "__main") return (void*)(intptr_t)&jit_noop;
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const char *NameStr = Name.c_str();
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// If this is an asm specifier, skip the sentinal.
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if (NameStr[0] == 1) ++NameStr;
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