mirror of
https://github.com/RPCS3/llvm.git
synced 2025-04-04 06:12:18 +00:00
545de00b4b
libraries are properly unloaded when llvm_shutdown is called.
Summary:
This was mostly affecting usage of the JIT, where storing the library handles in
a set made iteration unordered/undefined. This lead to disagreement between the
JIT and native code as to what the address and implementation of particularly on
Windows with stdlib functions:
JIT: putenv_s("TEST", "VALUE") // called msvcrt.dll, putenv_s
JIT: getenv("TEST") -> "VALUE" // called msvcrt.dll, getenv
Native: getenv("TEST") -> NULL // called ucrt.dll, getenv
Also fixed is the issue of DynamicLibrary::getPermanentLibrary(0,0) on Windows
not giving priority to the process' symbols as it did on Unix.
Reviewers: chapuni, v.g.vassilev, lhames
Reviewed By: lhames
Subscribers: danalbert, srhines, mgorny, vsk, llvm-commits
Differential Revision: https://reviews.llvm.org/D30107
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@301153 91177308-0d34-0410-b5e6-96231b3b80d8
132 lines
3.4 KiB
C++
132 lines
3.4 KiB
C++
//===- Unix/DynamicLibrary.cpp - Unix DL Implementation ---------*- C++ -*-===//
|
|
//
|
|
// The LLVM Compiler Infrastructure
|
|
//
|
|
// This file is distributed under the University of Illinois Open Source
|
|
// License. See LICENSE.TXT for details.
|
|
//
|
|
//===----------------------------------------------------------------------===//
|
|
//
|
|
// This file provides the UNIX specific implementation of DynamicLibrary.
|
|
//
|
|
//===----------------------------------------------------------------------===//
|
|
|
|
#if defined(HAVE_DLFCN_H) && defined(HAVE_DLOPEN)
|
|
#include <dlfcn.h>
|
|
|
|
DynamicLibrary::HandleSet::~HandleSet() {
|
|
for (void *Handle : Handles)
|
|
::dlclose(Handle);
|
|
if (Process)
|
|
::dlclose(Process);
|
|
}
|
|
|
|
void *DynamicLibrary::HandleSet::DLOpen(const char *File, std::string *Err) {
|
|
void *Handle = ::dlopen(File, RTLD_LAZY|RTLD_GLOBAL);
|
|
if (!Handle) {
|
|
if (Err) *Err = ::dlerror();
|
|
return &DynamicLibrary::Invalid;
|
|
}
|
|
|
|
#ifdef __CYGWIN__
|
|
// Cygwin searches symbols only in the main
|
|
// with the handle of dlopen(NULL, RTLD_GLOBAL).
|
|
if (!Filename)
|
|
Handle = RTLD_DEFAULT;
|
|
#endif
|
|
|
|
return Handle;
|
|
}
|
|
|
|
void DynamicLibrary::HandleSet::DLClose(void *Handle) {
|
|
::dlclose(Handle);
|
|
}
|
|
|
|
void *DynamicLibrary::HandleSet::DLSym(void *Handle, const char *Symbol) {
|
|
return ::dlsym(Handle, Symbol);
|
|
}
|
|
|
|
#else // !HAVE_DLOPEN
|
|
|
|
DynamicLibrary::HandleSet::~HandleSet() {}
|
|
|
|
void *DynamicLibrary::HandleSet::DLOpen(const char *File, std::string *Err) {
|
|
if (Err) *Err = "dlopen() not supported on this platform";
|
|
return &Invalid;
|
|
}
|
|
|
|
void DynamicLibrary::HandleSet::DLClose(void *Handle) {
|
|
}
|
|
|
|
void *DynamicLibrary::HandleSet::DLSym(void *Handle, const char *Symbol) {
|
|
return nullptr;
|
|
}
|
|
|
|
#endif
|
|
|
|
// Must declare the symbols in the global namespace.
|
|
static void *DoSearch(const char* SymbolName) {
|
|
#define EXPLICIT_SYMBOL(SYM) \
|
|
extern void *SYM; if (!strcmp(SymbolName, #SYM)) return &SYM
|
|
|
|
// If this is darwin, it has some funky issues, try to solve them here. Some
|
|
// important symbols are marked 'private external' which doesn't allow
|
|
// SearchForAddressOfSymbol to find them. As such, we special case them here,
|
|
// there is only a small handful of them.
|
|
|
|
#ifdef __APPLE__
|
|
{
|
|
// __eprintf is sometimes used for assert() handling on x86.
|
|
//
|
|
// FIXME: Currently disabled when using Clang, as we don't always have our
|
|
// runtime support libraries available.
|
|
#ifndef __clang__
|
|
#ifdef __i386__
|
|
EXPLICIT_SYMBOL(__eprintf);
|
|
#endif
|
|
#endif
|
|
}
|
|
#endif
|
|
|
|
#ifdef __CYGWIN__
|
|
{
|
|
EXPLICIT_SYMBOL(_alloca);
|
|
EXPLICIT_SYMBOL(__main);
|
|
}
|
|
#endif
|
|
|
|
#undef EXPLICIT_SYMBOL
|
|
|
|
// This macro returns the address of a well-known, explicit symbol
|
|
#define EXPLICIT_SYMBOL(SYM) \
|
|
if (!strcmp(SymbolName, #SYM)) return &SYM
|
|
|
|
// On linux we have a weird situation. The stderr/out/in symbols are both
|
|
// macros and global variables because of standards requirements. So, we
|
|
// boldly use the EXPLICIT_SYMBOL macro without checking for a #define first.
|
|
#if defined(__linux__) and !defined(__ANDROID__)
|
|
{
|
|
EXPLICIT_SYMBOL(stderr);
|
|
EXPLICIT_SYMBOL(stdout);
|
|
EXPLICIT_SYMBOL(stdin);
|
|
}
|
|
#else
|
|
// For everything else, we want to check to make sure the symbol isn't defined
|
|
// as a macro before using EXPLICIT_SYMBOL.
|
|
{
|
|
#ifndef stdin
|
|
EXPLICIT_SYMBOL(stdin);
|
|
#endif
|
|
#ifndef stdout
|
|
EXPLICIT_SYMBOL(stdout);
|
|
#endif
|
|
#ifndef stderr
|
|
EXPLICIT_SYMBOL(stderr);
|
|
#endif
|
|
}
|
|
#endif
|
|
#undef EXPLICIT_SYMBOL
|
|
|
|
return nullptr;
|
|
}
|