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Add detection of __dso_handle presence during configure. Use this information in the 

JITer (short path is added for darwin). This is needed to properly JIT llvm-gcc-4.2-built
binaries, since cxa_atexit is enabled by default on much more targets.

llvm-svn: 40600
This commit is contained in:
Anton Korobeynikov 2007-07-30 20:02:02 +00:00
parent dff9d69cfb
commit 7ac2521021
3 changed files with 26 additions and 15 deletions
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3
llvm/autoconf/configure.ac
View File

@ -766,6 +766,9 @@ dnl=== SECTION 9: Additional checks, variables, etc.
dnl===
dnl===-----------------------------------------------------------------------===
dnl Check, whether __dso_handle is present
AC_CHECK_FUNCS([__dso_handle])
dnl See if the llvm-gcc executable can compile to LLVM assembly
AC_CACHE_CHECK([whether llvm-gcc is sane],[llvm_cv_llvmgcc_sanity],
[llvm_cv_llvmgcc_sanity="no"

3
llvm/include/llvm/Config/config.h.in
View File

@ -437,6 +437,9 @@
/* Define to 1 if you have the <windows.h> header file. */
#undef HAVE_WINDOWS_H
/* Define to 1 if you have the `__dso_handle' function. */
#undef HAVE___DSO_HANDLE
/* Installation directory for binary executables */
#undef LLVM_BINDIR

35
llvm/lib/ExecutionEngine/JIT/JIT.cpp
View File

@ -27,17 +27,29 @@
#include "llvm/Target/TargetData.h"
#include "llvm/Target/TargetMachine.h"
#include "llvm/Target/TargetJITInfo.h"
#include "llvm/Config/config.h"
using namespace llvm;
#ifdef __APPLE__
#include <AvailabilityMacros.h>
#if defined(MAC_OS_X_VERSION_10_4) && \
((MAC_OS_X_VERSION_MIN_REQUIRED > MAC_OS_X_VERSION_10_4) || \
(MAC_OS_X_VERSION_MIN_REQUIRED == MAC_OS_X_VERSION_10_4 && \
__APPLE_CC__ >= 5330))
// __dso_handle is resolved by Mac OS X dynamic linker.
extern void *__dso_handle __attribute__ ((__visibility__ ("hidden")));
// Apple gcc defaults to -fuse-cxa-atexit (i.e. calls __cxa_atexit instead
// of atexit). It passes the address of linker generated symbol __dso_handle
// to the function.
// This configuration change happened at version 5330.
# include <AvailabilityMacros.h>
# if defined(MAC_OS_X_VERSION_10_4) && \
((MAC_OS_X_VERSION_MIN_REQUIRED > MAC_OS_X_VERSION_10_4) || \
(MAC_OS_X_VERSION_MIN_REQUIRED == MAC_OS_X_VERSION_10_4 && \
__APPLE_CC__ >= 5330))
# ifndef HAVE___DSO_HANDLE
# define HAVE___DSO_HANDLE 1
# endif
# endif
#endif
#if HAVE___DSO_HANDLE
extern void *__dso_handle __attribute__ ((__visibility__ ("hidden")));
#endif
static struct RegisterJIT {
@ -302,14 +314,7 @@ void *JIT::getOrEmitGlobalVariable(const GlobalVariable *GV) {
// If the global is external, just remember the address.
if (GV->isDeclaration()) {
#if defined(__APPLE__) && defined(MAC_OS_X_VERSION_10_4) && \
((MAC_OS_X_VERSION_MIN_REQUIRED > MAC_OS_X_VERSION_10_4) || \
(MAC_OS_X_VERSION_MIN_REQUIRED == MAC_OS_X_VERSION_10_4 && \
__APPLE_CC__ >= 5330))
// Apple gcc defaults to -fuse-cxa-atexit (i.e. calls __cxa_atexit instead
// of atexit). It passes the address of linker generated symbol __dso_handle
// to the function.
// This configuration change happened at version 5330.
#if HAVE___DSO_HANDLE
if (GV->getName() == "__dso_handle")
return (void*)&__dso_handle;
#endif