//
// The LLVM Compiler Infrastructure
//
-// This file was developed by Reid Spencer and is distributed under the
-// University of Illinois Open Source License. See LICENSE.TXT for details.
+// This file is distributed under the University of Illinois Open Source
+// License. See LICENSE.TXT for details.
//
//===----------------------------------------------------------------------===//
//
#include "llvm/System/DynamicLibrary.h"
#include "llvm/Config/config.h"
+#include <cstring>
#include <map>
// Collection of symbol name/value pairs to be searched prior to any libraries.
static bool did_initialize_ltdl = false;
if (!did_initialize_ltdl) {
int Err = lt_dlinit();
+ Err = Err; // Silence warning.
assert(0 == Err && "Can't init the ltdl library");
did_initialize_ltdl = true;
}
lt_dlhandle a_handle = lt_dlopen(0);
- assert(a_handle == 0 || "Can't open program as dynamic library");
+ assert(a_handle && "Can't open program as dynamic library");
handle = a_handle;
OpenedHandles.push_back(a_handle);
return ptr;
}
+#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__
-#define EXPLICIT_SYMBOL(SYM) \
- extern void *SYM; if (!strcmp(symbolName, #SYM)) return &SYM
{
EXPLICIT_SYMBOL(__ashldi3);
EXPLICIT_SYMBOL(__ashrdi3);
EXPLICIT_SYMBOL(__udivdi3);
EXPLICIT_SYMBOL(__umoddi3);
}
-#undef EXPLICIT_SYMBOL
#endif
+
+#ifdef __CYGWIN__
+ {
+ EXPLICIT_SYMBOL(_alloca);
+ }
+#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
- // Try a few well known symbols just to give lli a shot at working.
- // Note that on some systems stdin, etc. are macros so we have to
- // avoid attempting to take the address of a macro :)
+
+// 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__)
+ {
+ 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 0;