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Change to use GetAddressOfSymbol instead of dlsym.

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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@9012 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Brian Gaeke 2003-10-10 17:02:42 +00:00
parent 56d8616872
commit 322cdb2e63
2 changed files with 9 additions and 18 deletions
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12
lib/ExecutionEngine/ExecutionEngine.cpp
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@ -16,6 +16,7 @@
#include "llvm/Target/TargetData.h"
#include "Support/Debug.h"
#include "Support/Statistic.h"
#include "Support/DynamicLinker.h"
#include "Config/dlfcn.h"
Statistic<> NumInitBytes("lli", "Number of bytes of global vars initialized");
@ -339,14 +340,9 @@ void ExecutionEngine::emitGlobals() {
DEBUG(std::cerr << "Global '" << I->getName() << "' -> "
<< (void*)GlobalAddress[I] << "\n");
} else {
// On Sparc, RTLD_SELF is already defined and it's not zero
// Linux/x86 wants to use a 0, other systems may differ
#ifndef RTLD_SELF
#define RTLD_SELF 0
#endif
// External variable reference, try to use dlsym to get a pointer to it in
// the LLI image.
if (void *SymAddr = dlsym(RTLD_SELF, I->getName().c_str()))
// External variable reference. Try to use the dynamic loader to
// get a pointer to it.
if (void *SymAddr = GetAddressOfSymbol(I->getName().c_str()))
GlobalAddress[I] = SymAddr;
else {
std::cerr << "Could not resolve external global address: "

15
lib/ExecutionEngine/JIT/Intercept.cpp
View File

@ -1,7 +1,7 @@
//===-- Intercept.cpp - System function interception routines -------------===//
//
// If a function call occurs to an external function, the JIT is designed to use
// dlsym on the current process to find a function to call. This is useful for
// the dynamic loader interface to find a function to call. This is useful for
// calling system calls and library functions that are not available in LLVM.
// Some system calls, however, need to be handled specially. For this reason,
// we intercept some of them here and use our own stubs to handle them.
@ -9,7 +9,7 @@
//===----------------------------------------------------------------------===//
#include "VM.h"
#include "Config/dlfcn.h" // dlsym access
#include "Support/DynamicLinker.h"
#include <iostream>
// AtExitHandlers - List of functions to call when the program exits,
@ -50,8 +50,8 @@ static int jit_atexit(void (*Fn)(void)) {
//===----------------------------------------------------------------------===//
//
/// getPointerToNamedFunction - This method returns the address of the specified
/// function by using the dlsym function call. As such it is only useful for
/// resolving library symbols, not code generated symbols.
/// function by using the dynamic loader interface. As such it is only useful
/// for resolving library symbols, not code generated symbols.
///
void *VM::getPointerToNamedFunction(const std::string &Name) {
// Check to see if this is one of the functions we want to intercept...
@ -59,12 +59,7 @@ void *VM::getPointerToNamedFunction(const std::string &Name) {
if (Name == "atexit") return (void*)&jit_atexit;
// If it's an external function, look it up in the process image...
// On Sparc, RTLD_SELF is already defined and it's not zero
// Linux/x86 wants to use a 0, other systems may differ
#ifndef RTLD_SELF
#define RTLD_SELF 0
#endif
void *Ptr = dlsym(RTLD_SELF, Name.c_str());
void *Ptr = GetAddressOfSymbol(Name);
if (Ptr == 0) {
std::cerr << "WARNING: Cannot resolve fn '" << Name
<< "' using a dummy noop function instead!\n";