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Help the lli interpreter find the stderr/stdin/stdout symbols. These are

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needed for output to be generated. On Linux these are both global vars and
macro definitions so we have to special case Linux.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@33374 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Reid Spencer 2007-01-19 21:41:04 +00:00
parent 81e3954dc9
commit 02f20d3d9b
1 changed files with 19 additions and 3 deletions
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22
lib/System/DynamicLibrary.cpp
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@ -164,11 +164,23 @@ void* DynamicLibrary::SearchForAddressOfSymbol(const char* symbolName) {
}
#undef EXPLICIT_SYMBOL
#endif
// 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);
@ -178,8 +190,12 @@ void* DynamicLibrary::SearchForAddressOfSymbol(const char* symbolName) {
#endif
#ifndef stderr
EXPLICIT_SYMBOL(stderr);
#endif
#ifndef errno
EXPLICIT_SYMBOL(errno);
#endif
}
#endif
#undef EXPLICIT_SYMBOL
return 0;