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Fix PR8441, a thread unsafe static variable in our dynamic library loading facilities.

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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@118463 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Owen Anderson 2010-11-09 00:36:06 +00:00
parent 5e559a22c1
commit 9ac18d562d
1 changed files with 4 additions and 0 deletions
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4
lib/System/DynamicLibrary.cpp
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@ -15,6 +15,7 @@
//===----------------------------------------------------------------------===//
#include "llvm/System/DynamicLibrary.h"
#include "llvm/System/Mutex.h"
#include "llvm/Config/config.h"
#include <cstdio>
#include <cstring>
@ -60,6 +61,7 @@ using namespace llvm::sys;
//=== independent code.
//===----------------------------------------------------------------------===//
static SmartMutex<true> HandlesMutex;
static std::vector<void *> *OpenedHandles = 0;
@ -76,6 +78,7 @@ bool DynamicLibrary::LoadLibraryPermanently(const char *Filename,
if (Filename == NULL)
H = RTLD_DEFAULT;
#endif
SmartScopedLock<true> Lock(HandlesMutex);
if (OpenedHandles == 0)
OpenedHandles = new std::vector<void *>();
OpenedHandles->push_back(H);
@ -110,6 +113,7 @@ void* DynamicLibrary::SearchForAddressOfSymbol(const char* symbolName) {
#if HAVE_DLFCN_H
// Now search the libraries.
SmartScopedLock<true> Lock(HandlesMutex);
if (OpenedHandles) {
for (std::vector<void *>::iterator I = OpenedHandles->begin(),
E = OpenedHandles->end(); I != E; ++I) {