//===----------------------------------------------------------------------===//
#include "llvm/System/DynamicLibrary.h"
+#include "llvm/System/Mutex.h"
#include "llvm/Config/config.h"
#include <cstdio>
#include <cstring>
// Collection of symbol name/value pairs to be searched prior to any libraries.
static std::map<std::string, void*> *ExplicitSymbols = 0;
-static struct ExplicitSymbolsDeleter {
+namespace {
+
+struct ExplicitSymbolsDeleter {
~ExplicitSymbolsDeleter() {
if (ExplicitSymbols)
delete ExplicitSymbols;
}
-} Dummy;
+};
+
+}
+
+static ExplicitSymbolsDeleter Dummy;
void llvm::sys::DynamicLibrary::AddSymbol(const char* symbolName,
void *symbolValue) {
#else
+#if HAVE_DLFCN_H
#include <dlfcn.h>
using namespace llvm;
using namespace llvm::sys;
//=== independent code.
//===----------------------------------------------------------------------===//
+static SmartMutex<true> HandlesMutex;
static std::vector<void *> *OpenedHandles = 0;
if (ErrMsg) *ErrMsg = dlerror();
return true;
}
+#ifdef __CYGWIN__
+ // Cygwin searches symbols only in the main
+ // with the handle of dlopen(NULL, RTLD_GLOBAL).
+ if (Filename == NULL)
+ H = RTLD_DEFAULT;
+#endif
+ SmartScopedLock<true> Lock(HandlesMutex);
if (OpenedHandles == 0)
OpenedHandles = new std::vector<void *>();
OpenedHandles->push_back(H);
return false;
}
+#else
-static void *SearchForAddressOfSpecialSymbol(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__
- {
- EXPLICIT_SYMBOL(__ashldi3);
- EXPLICIT_SYMBOL(__ashrdi3);
- EXPLICIT_SYMBOL(__cmpdi2);
- EXPLICIT_SYMBOL(__divdi3);
- EXPLICIT_SYMBOL(__eprintf);
- EXPLICIT_SYMBOL(__fixdfdi);
- EXPLICIT_SYMBOL(__fixsfdi);
- EXPLICIT_SYMBOL(__fixunsdfdi);
- EXPLICIT_SYMBOL(__fixunssfdi);
- EXPLICIT_SYMBOL(__floatdidf);
- EXPLICIT_SYMBOL(__floatdisf);
- EXPLICIT_SYMBOL(__lshrdi3);
- EXPLICIT_SYMBOL(__moddi3);
- EXPLICIT_SYMBOL(__udivdi3);
- EXPLICIT_SYMBOL(__umoddi3);
- }
-#endif
+using namespace llvm;
+using namespace llvm::sys;
-#ifdef __CYGWIN__
- {
- EXPLICIT_SYMBOL(_alloca);
- EXPLICIT_SYMBOL(__main);
- }
+bool DynamicLibrary::LoadLibraryPermanently(const char *Filename,
+ std::string *ErrMsg) {
+ if (ErrMsg) *ErrMsg = "dlopen() not supported on this platform";
+ return true;
+}
#endif
-#undef EXPLICIT_SYMBOL
- return 0;
+namespace llvm {
+void *SearchForAddressOfSpecialSymbol(const char* symbolName);
}
void* DynamicLibrary::SearchForAddressOfSymbol(const char* symbolName) {
return I->second;
}
+#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) {
}
}
}
+#endif
- if (void *Result = SearchForAddressOfSpecialSymbol(symbolName))
+ if (void *Result = llvm::SearchForAddressOfSpecialSymbol(symbolName))
return Result;
// This macro returns the address of a well-known, explicit symbol