From 9c0e59de64de9f6d52eac8b4701baafc7034aaf7 Mon Sep 17 00:00:00 2001 From: NAKAMURA Takumi Date: Mon, 30 Aug 2010 14:00:29 +0000 Subject: 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. llvm-svn: 112474 --- llvm/lib/ExecutionEngine/JIT/Intercept.cpp | 12 ++++++++++++ 1 file changed, 12 insertions(+) (limited to 'llvm/lib/ExecutionEngine') diff --git a/llvm/lib/ExecutionEngine/JIT/Intercept.cpp b/llvm/lib/ExecutionEngine/JIT/Intercept.cpp index b367033d32b..c8872e433f3 100644 --- a/llvm/lib/ExecutionEngine/JIT/Intercept.cpp +++ b/llvm/lib/ExecutionEngine/JIT/Intercept.cpp @@ -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; -- cgit v1.2.3