Address PR274 - '[JIT] Programs cannot resolve the fstat function'
by trying to get the compiler to generate an undefined reference for it
and related functions which live in libc_nonshared.a on Linux.
Linkers... sigh.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@12256 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/lib/ExecutionEngine/JIT/Intercept.cpp b/lib/ExecutionEngine/JIT/Intercept.cpp
index 0b1b976..e4b9cc1 100644
--- a/lib/ExecutionEngine/JIT/Intercept.cpp
+++ b/lib/ExecutionEngine/JIT/Intercept.cpp
@@ -18,6 +18,7 @@
#include "JIT.h"
#include "Support/DynamicLinker.h"
#include <iostream>
+#include <sys/stat.h>
using namespace llvm;
// AtExitHandlers - List of functions to call when the program exits,
@@ -40,6 +41,23 @@
// Function stubs that are invoked instead of certain library calls
//===----------------------------------------------------------------------===//
+// Force the following functions to be linked in to anything that uses the
+// JIT. This is a hack designed to work around the all-too-clever Glibc
+// strategy of making these functions work differently when inlined vs. when
+// not inlined, and hiding their real definitions in a separate archive file
+// that the dynamic linker can't see. For more info, search for
+// 'libc_nonshared.a' on Google, or read http://llvm.cs.uiuc.edu/PR274.
+void *FunctionPointers[] = {
+ (void *) stat,
+ (void *) stat64,
+ (void *) fstat,
+ (void *) fstat64,
+ (void *) lstat,
+ (void *) lstat64,
+ (void *) atexit,
+ (void *) mknod
+};
+
// NoopFn - Used if we have nothing else to call...
static void NoopFn() {}