mirror of
https://github.com/c64scene-ar/llvm-6502.git
synced 2024-08-27 15:29:51 +00:00
Move getPointerToNamedFunction() from JIT/MCJIT to JITMemoryManager.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@153607 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
parent
8f3fabe0fe
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30b9e322e1
@ -47,6 +47,17 @@ public:
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/// debugging, and may be turned on by default in debug mode.
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virtual void setPoisonMemory(bool poison) = 0;
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/// getPointerToNamedFunction - This method returns the address of the
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/// specified function. As such it is only useful for resolving library
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/// symbols, not code generated symbols.
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///
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/// If AbortOnFailure is false and no function with the given name is
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/// found, this function silently returns a null pointer. Otherwise,
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/// it prints a message to stderr and aborts.
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///
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virtual void *getPointerToNamedFunction(const std::string &Name,
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bool AbortOnFailure = true) = 0;
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//===--------------------------------------------------------------------===//
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// Global Offset Table Management
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//===--------------------------------------------------------------------===//
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@ -54,6 +54,10 @@ public:
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// memory was actually used.
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virtual void endFunctionBody(const char *Name, uint8_t *FunctionStart,
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uint8_t *FunctionEnd) = 0;
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virtual void *getPointerToNamedFunction(const std::string &Name,
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bool AbortOnFailure = true) = 0;
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};
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class RuntimeDyld {
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@ -2,7 +2,6 @@
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add_definitions(-DENABLE_X86_JIT)
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add_llvm_library(LLVMJIT
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Intercept.cpp
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JIT.cpp
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JITDwarfEmitter.cpp
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JITEmitter.cpp
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@ -1,162 +0,0 @@
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//===-- Intercept.cpp - System function interception routines -------------===//
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//
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// The LLVM Compiler Infrastructure
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//
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// This file is distributed under the University of Illinois Open Source
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// License. See LICENSE.TXT for details.
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//
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//===----------------------------------------------------------------------===//
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//
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// If a function call occurs to an external function, the JIT is designed to use
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// the dynamic loader interface to find a function to call. This is useful for
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// calling system calls and library functions that are not available in LLVM.
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// Some system calls, however, need to be handled specially. For this reason,
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// we intercept some of them here and use our own stubs to handle them.
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//
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//===----------------------------------------------------------------------===//
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#include "JIT.h"
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#include "llvm/Support/ErrorHandling.h"
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#include "llvm/Support/DynamicLibrary.h"
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#include "llvm/Config/config.h"
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using namespace llvm;
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// AtExitHandlers - List of functions to call when the program exits,
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// registered with the atexit() library function.
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static std::vector<void (*)()> AtExitHandlers;
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/// runAtExitHandlers - Run any functions registered by the program's
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/// calls to atexit(3), which we intercept and store in
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/// AtExitHandlers.
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///
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static void runAtExitHandlers() {
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while (!AtExitHandlers.empty()) {
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void (*Fn)() = AtExitHandlers.back();
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AtExitHandlers.pop_back();
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Fn();
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}
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}
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//===----------------------------------------------------------------------===//
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// Function stubs that are invoked instead of certain library calls
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//===----------------------------------------------------------------------===//
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// Force the following functions to be linked in to anything that uses the
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// JIT. This is a hack designed to work around the all-too-clever Glibc
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// strategy of making these functions work differently when inlined vs. when
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// not inlined, and hiding their real definitions in a separate archive file
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// that the dynamic linker can't see. For more info, search for
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// 'libc_nonshared.a' on Google, or read http://llvm.org/PR274.
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#if defined(__linux__)
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#if defined(HAVE_SYS_STAT_H)
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#include <sys/stat.h>
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#endif
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#include <fcntl.h>
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#include <unistd.h>
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/* stat functions are redirecting to __xstat with a version number. On x86-64
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* linking with libc_nonshared.a and -Wl,--export-dynamic doesn't make 'stat'
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* available as an exported symbol, so we have to add it explicitly.
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*/
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namespace {
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class StatSymbols {
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public:
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StatSymbols() {
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sys::DynamicLibrary::AddSymbol("stat", (void*)(intptr_t)stat);
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sys::DynamicLibrary::AddSymbol("fstat", (void*)(intptr_t)fstat);
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sys::DynamicLibrary::AddSymbol("lstat", (void*)(intptr_t)lstat);
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sys::DynamicLibrary::AddSymbol("stat64", (void*)(intptr_t)stat64);
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sys::DynamicLibrary::AddSymbol("\x1stat64", (void*)(intptr_t)stat64);
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sys::DynamicLibrary::AddSymbol("\x1open64", (void*)(intptr_t)open64);
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sys::DynamicLibrary::AddSymbol("\x1lseek64", (void*)(intptr_t)lseek64);
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sys::DynamicLibrary::AddSymbol("fstat64", (void*)(intptr_t)fstat64);
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sys::DynamicLibrary::AddSymbol("lstat64", (void*)(intptr_t)lstat64);
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sys::DynamicLibrary::AddSymbol("atexit", (void*)(intptr_t)atexit);
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sys::DynamicLibrary::AddSymbol("mknod", (void*)(intptr_t)mknod);
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}
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};
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}
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static StatSymbols initStatSymbols;
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#endif // __linux__
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// jit_exit - Used to intercept the "exit" library call.
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static void jit_exit(int Status) {
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runAtExitHandlers(); // Run atexit handlers...
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exit(Status);
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}
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// jit_atexit - Used to intercept the "atexit" library call.
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static int jit_atexit(void (*Fn)()) {
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AtExitHandlers.push_back(Fn); // Take note of atexit handler...
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return 0; // Always successful
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}
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static int jit_noop() {
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return 0;
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}
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//===----------------------------------------------------------------------===//
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//
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/// getPointerToNamedFunction - This method returns the address of the specified
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/// function by using the dynamic loader interface. As such it is only useful
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/// for resolving library symbols, not code generated symbols.
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///
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void *JIT::getPointerToNamedFunction(const std::string &Name,
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bool AbortOnFailure) {
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if (!isSymbolSearchingDisabled()) {
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// Check to see if this is one of the functions we want to intercept. Note,
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// we cast to intptr_t here to silence a -pedantic warning that complains
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// about casting a function pointer to a normal pointer.
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if (Name == "exit") return (void*)(intptr_t)&jit_exit;
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if (Name == "atexit") return (void*)(intptr_t)&jit_atexit;
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// We should not invoke parent's ctors/dtors from generated main()!
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// On Mingw and Cygwin, the symbol __main is resolved to
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// callee's(eg. tools/lli) one, to invoke wrong duplicated ctors
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// (and register wrong callee's dtors with atexit(3)).
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// We expect ExecutionEngine::runStaticConstructorsDestructors()
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// is called before ExecutionEngine::runFunctionAsMain() is called.
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if (Name == "__main") return (void*)(intptr_t)&jit_noop;
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const char *NameStr = Name.c_str();
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// If this is an asm specifier, skip the sentinal.
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if (NameStr[0] == 1) ++NameStr;
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// If it's an external function, look it up in the process image...
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void *Ptr = sys::DynamicLibrary::SearchForAddressOfSymbol(NameStr);
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if (Ptr) return Ptr;
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// If it wasn't found and if it starts with an underscore ('_') character,
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// and has an asm specifier, try again without the underscore.
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if (Name[0] == 1 && NameStr[0] == '_') {
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Ptr = sys::DynamicLibrary::SearchForAddressOfSymbol(NameStr+1);
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if (Ptr) return Ptr;
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}
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// Darwin/PPC adds $LDBLStub suffixes to various symbols like printf. These
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// are references to hidden visibility symbols that dlsym cannot resolve.
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// If we have one of these, strip off $LDBLStub and try again.
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#if defined(__APPLE__) && defined(__ppc__)
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if (Name.size() > 9 && Name[Name.size()-9] == '$' &&
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memcmp(&Name[Name.size()-8], "LDBLStub", 8) == 0) {
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// First try turning $LDBLStub into $LDBL128. If that fails, strip it off.
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// This mirrors logic in libSystemStubs.a.
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std::string Prefix = std::string(Name.begin(), Name.end()-9);
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if (void *Ptr = getPointerToNamedFunction(Prefix+"$LDBL128", false))
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return Ptr;
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if (void *Ptr = getPointerToNamedFunction(Prefix, false))
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return Ptr;
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}
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#endif
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}
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/// If a LazyFunctionCreator is installed, use it to get/create the function.
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if (LazyFunctionCreator)
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if (void *RP = LazyFunctionCreator(Name))
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return RP;
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if (AbortOnFailure) {
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report_fatal_error("Program used external function '"+Name+
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"' which could not be resolved!");
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}
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return 0;
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}
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@ -23,6 +23,7 @@
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#include "llvm/CodeGen/MachineCodeInfo.h"
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#include "llvm/ExecutionEngine/GenericValue.h"
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#include "llvm/ExecutionEngine/JITEventListener.h"
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#include "llvm/ExecutionEngine/JITMemoryManager.h"
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#include "llvm/Target/TargetData.h"
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#include "llvm/Target/TargetMachine.h"
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#include "llvm/Target/TargetJITInfo.h"
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@ -267,9 +268,10 @@ extern "C" {
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}
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JIT::JIT(Module *M, TargetMachine &tm, TargetJITInfo &tji,
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JITMemoryManager *JMM, bool GVsWithCode)
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: ExecutionEngine(M), TM(tm), TJI(tji), AllocateGVsWithCode(GVsWithCode),
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isAlreadyCodeGenerating(false) {
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JITMemoryManager *jmm, bool GVsWithCode)
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: ExecutionEngine(M), TM(tm), TJI(tji),
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JMM(jmm ? jmm : JITMemoryManager::CreateDefaultMemManager()),
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AllocateGVsWithCode(GVsWithCode), isAlreadyCodeGenerating(false) {
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setTargetData(TM.getTargetData());
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jitstate = new JITState(M);
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@ -322,6 +324,7 @@ JIT::~JIT() {
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AllJits->Remove(this);
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delete jitstate;
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delete JCE;
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// JMM is a ownership of JCE, so we no need delete JMM here.
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delete &TM;
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}
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@ -711,6 +714,27 @@ void *JIT::getPointerToBasicBlock(BasicBlock *BB) {
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}
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}
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void *JIT::getPointerToNamedFunction(const std::string &Name,
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bool AbortOnFailure){
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if (!isSymbolSearchingDisabled()) {
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void *ptr = JMM->getPointerToNamedFunction(Name, false);
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if (ptr)
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return ptr;
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}
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/// If a LazyFunctionCreator is installed, use it to get/create the function.
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if (LazyFunctionCreator)
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if (void *RP = LazyFunctionCreator(Name))
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return RP;
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if (AbortOnFailure) {
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report_fatal_error("Program used external function '"+Name+
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"' which could not be resolved!");
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}
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return 0;
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}
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/// getOrEmitGlobalVariable - Return the address of the specified global
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/// variable, possibly emitting it to memory if needed. This is used by the
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/// Emitter.
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@ -58,6 +58,7 @@ class JIT : public ExecutionEngine {
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TargetMachine &TM; // The current target we are compiling to
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TargetJITInfo &TJI; // The JITInfo for the target we are compiling to
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JITCodeEmitter *JCE; // JCE object
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JITMemoryManager *JMM;
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std::vector<JITEventListener*> EventListeners;
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/// AllocateGVsWithCode - Some applications require that global variables and
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@ -117,7 +118,7 @@ public:
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const std::vector<GenericValue> &ArgValues);
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/// getPointerToNamedFunction - This method returns the address of the
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/// specified function by using the dlsym function call. As such it is only
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/// specified function by using the MemoryManager. As such it is only
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/// useful for resolving library symbols, not code generated symbols.
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///
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/// If AbortOnFailure is false and no function with the given name is
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@ -23,10 +23,22 @@
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#include "llvm/Support/ErrorHandling.h"
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#include "llvm/Support/raw_ostream.h"
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#include "llvm/Support/Memory.h"
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#include "llvm/Support/ErrorHandling.h"
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#include "llvm/Support/DynamicLibrary.h"
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#include "llvm/Config/config.h"
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#include <vector>
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#include <cassert>
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#include <climits>
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#include <cstring>
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#if defined(__linux__)
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#if defined(HAVE_SYS_STAT_H)
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#include <sys/stat.h>
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#endif
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#include <fcntl.h>
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#include <unistd.h>
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#endif
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using namespace llvm;
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STATISTIC(NumSlabs, "Number of slabs of memory allocated by the JIT");
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@ -314,6 +326,11 @@ namespace {
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/// should allocate a separate slab.
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static const size_t DefaultSizeThreshold;
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/// getPointerToNamedFunction - This method returns the address of the
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/// specified function by using the dlsym function call.
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virtual void *getPointerToNamedFunction(const std::string &Name,
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bool AbortOnFailure = true);
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void AllocateGOT();
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// Testing methods.
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@ -757,6 +774,139 @@ bool DefaultJITMemoryManager::CheckInvariants(std::string &ErrorStr) {
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return true;
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}
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//===----------------------------------------------------------------------===//
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// getPointerToNamedFunction() implementation.
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//===----------------------------------------------------------------------===//
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// AtExitHandlers - List of functions to call when the program exits,
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// registered with the atexit() library function.
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static std::vector<void (*)()> AtExitHandlers;
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/// runAtExitHandlers - Run any functions registered by the program's
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/// calls to atexit(3), which we intercept and store in
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/// AtExitHandlers.
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///
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static void runAtExitHandlers() {
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while (!AtExitHandlers.empty()) {
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void (*Fn)() = AtExitHandlers.back();
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AtExitHandlers.pop_back();
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Fn();
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}
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}
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//===----------------------------------------------------------------------===//
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// Function stubs that are invoked instead of certain library calls
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//
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// Force the following functions to be linked in to anything that uses the
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// JIT. This is a hack designed to work around the all-too-clever Glibc
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// strategy of making these functions work differently when inlined vs. when
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// not inlined, and hiding their real definitions in a separate archive file
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// that the dynamic linker can't see. For more info, search for
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// 'libc_nonshared.a' on Google, or read http://llvm.org/PR274.
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#if defined(__linux__)
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/* stat functions are redirecting to __xstat with a version number. On x86-64
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* linking with libc_nonshared.a and -Wl,--export-dynamic doesn't make 'stat'
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* available as an exported symbol, so we have to add it explicitly.
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*/
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namespace {
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class StatSymbols {
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public:
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StatSymbols() {
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sys::DynamicLibrary::AddSymbol("stat", (void*)(intptr_t)stat);
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sys::DynamicLibrary::AddSymbol("fstat", (void*)(intptr_t)fstat);
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sys::DynamicLibrary::AddSymbol("lstat", (void*)(intptr_t)lstat);
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sys::DynamicLibrary::AddSymbol("stat64", (void*)(intptr_t)stat64);
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sys::DynamicLibrary::AddSymbol("\x1stat64", (void*)(intptr_t)stat64);
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sys::DynamicLibrary::AddSymbol("\x1open64", (void*)(intptr_t)open64);
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sys::DynamicLibrary::AddSymbol("\x1lseek64", (void*)(intptr_t)lseek64);
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sys::DynamicLibrary::AddSymbol("fstat64", (void*)(intptr_t)fstat64);
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sys::DynamicLibrary::AddSymbol("lstat64", (void*)(intptr_t)lstat64);
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sys::DynamicLibrary::AddSymbol("atexit", (void*)(intptr_t)atexit);
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sys::DynamicLibrary::AddSymbol("mknod", (void*)(intptr_t)mknod);
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}
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};
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}
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static StatSymbols initStatSymbols;
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#endif // __linux__
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// jit_exit - Used to intercept the "exit" library call.
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static void jit_exit(int Status) {
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runAtExitHandlers(); // Run atexit handlers...
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exit(Status);
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}
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// jit_atexit - Used to intercept the "atexit" library call.
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static int jit_atexit(void (*Fn)()) {
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AtExitHandlers.push_back(Fn); // Take note of atexit handler...
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return 0; // Always successful
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}
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static int jit_noop() {
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return 0;
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}
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//===----------------------------------------------------------------------===//
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//
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/// getPointerToNamedFunction - This method returns the address of the specified
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/// function by using the dynamic loader interface. As such it is only useful
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/// for resolving library symbols, not code generated symbols.
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///
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void *DefaultJITMemoryManager::getPointerToNamedFunction(const std::string &Name,
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bool AbortOnFailure) {
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// Check to see if this is one of the functions we want to intercept. Note,
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// we cast to intptr_t here to silence a -pedantic warning that complains
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// about casting a function pointer to a normal pointer.
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if (Name == "exit") return (void*)(intptr_t)&jit_exit;
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if (Name == "atexit") return (void*)(intptr_t)&jit_atexit;
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|
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// We should not invoke parent's ctors/dtors from generated main()!
|
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// On Mingw and Cygwin, the symbol __main is resolved to
|
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// callee's(eg. tools/lli) one, to invoke wrong duplicated ctors
|
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// (and register wrong callee's dtors with atexit(3)).
|
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// We expect ExecutionEngine::runStaticConstructorsDestructors()
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// is called before ExecutionEngine::runFunctionAsMain() is called.
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if (Name == "__main") return (void*)(intptr_t)&jit_noop;
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const char *NameStr = Name.c_str();
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// If this is an asm specifier, skip the sentinal.
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if (NameStr[0] == 1) ++NameStr;
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// If it's an external function, look it up in the process image...
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void *Ptr = sys::DynamicLibrary::SearchForAddressOfSymbol(NameStr);
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if (Ptr) return Ptr;
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// If it wasn't found and if it starts with an underscore ('_') character,
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// try again without the underscore.
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if (NameStr[0] == '_') {
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Ptr = sys::DynamicLibrary::SearchForAddressOfSymbol(NameStr+1);
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if (Ptr) return Ptr;
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}
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// Darwin/PPC adds $LDBLStub suffixes to various symbols like printf. These
|
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// are references to hidden visibility symbols that dlsym cannot resolve.
|
||||
// If we have one of these, strip off $LDBLStub and try again.
|
||||
#if defined(__APPLE__) && defined(__ppc__)
|
||||
if (Name.size() > 9 && Name[Name.size()-9] == '$' &&
|
||||
memcmp(&Name[Name.size()-8], "LDBLStub", 8) == 0) {
|
||||
// First try turning $LDBLStub into $LDBL128. If that fails, strip it off.
|
||||
// This mirrors logic in libSystemStubs.a.
|
||||
std::string Prefix = std::string(Name.begin(), Name.end()-9);
|
||||
if (void *Ptr = getPointerToNamedFunction(Prefix+"$LDBL128", false))
|
||||
return Ptr;
|
||||
if (void *Ptr = getPointerToNamedFunction(Prefix, false))
|
||||
return Ptr;
|
||||
}
|
||||
#endif
|
||||
|
||||
if (AbortOnFailure) {
|
||||
report_fatal_error("Program used external function '"+Name+
|
||||
"' which could not be resolved!");
|
||||
}
|
||||
return 0;
|
||||
}
|
||||
|
||||
|
||||
|
||||
JITMemoryManager *JITMemoryManager::CreateDefaultMemManager() {
|
||||
return new DefaultJITMemoryManager();
|
||||
}
|
||||
|
@ -1,5 +1,4 @@
|
||||
add_llvm_library(LLVMMCJIT
|
||||
MCJIT.cpp
|
||||
MCJITMemoryManager.cpp
|
||||
Intercept.cpp
|
||||
)
|
||||
|
@ -1,162 +0,0 @@
|
||||
//===-- Intercept.cpp - System function interception routines -------------===//
|
||||
//
|
||||
// The LLVM Compiler Infrastructure
|
||||
//
|
||||
// This file is distributed under the University of Illinois Open Source
|
||||
// License. See LICENSE.TXT for details.
|
||||
//
|
||||
//===----------------------------------------------------------------------===//
|
||||
//
|
||||
// If a function call occurs to an external function, the JIT is designed to use
|
||||
// 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.
|
||||
//
|
||||
//===----------------------------------------------------------------------===//
|
||||
|
||||
#include "MCJIT.h"
|
||||
#include "llvm/Support/ErrorHandling.h"
|
||||
#include "llvm/Support/DynamicLibrary.h"
|
||||
#include "llvm/Config/config.h"
|
||||
using namespace llvm;
|
||||
|
||||
// AtExitHandlers - List of functions to call when the program exits,
|
||||
// registered with the atexit() library function.
|
||||
static std::vector<void (*)()> AtExitHandlers;
|
||||
|
||||
/// runAtExitHandlers - Run any functions registered by the program's
|
||||
/// calls to atexit(3), which we intercept and store in
|
||||
/// AtExitHandlers.
|
||||
///
|
||||
static void runAtExitHandlers() {
|
||||
while (!AtExitHandlers.empty()) {
|
||||
void (*Fn)() = AtExitHandlers.back();
|
||||
AtExitHandlers.pop_back();
|
||||
Fn();
|
||||
}
|
||||
}
|
||||
|
||||
//===----------------------------------------------------------------------===//
|
||||
// Function stubs that are invoked instead of certain library calls
|
||||
//===----------------------------------------------------------------------===//
|
||||
|
||||
// Force the following functions to be linked in to anything that uses the
|
||||
// JIT. This is a hack designed to work around the all-too-clever Glibc
|
||||
// strategy of making these functions work differently when inlined vs. when
|
||||
// not inlined, and hiding their real definitions in a separate archive file
|
||||
// that the dynamic linker can't see. For more info, search for
|
||||
// 'libc_nonshared.a' on Google, or read http://llvm.org/PR274.
|
||||
#if defined(__linux__)
|
||||
#if defined(HAVE_SYS_STAT_H)
|
||||
#include <sys/stat.h>
|
||||
#endif
|
||||
#include <fcntl.h>
|
||||
#include <unistd.h>
|
||||
/* stat functions are redirecting to __xstat with a version number. On x86-64
|
||||
* linking with libc_nonshared.a and -Wl,--export-dynamic doesn't make 'stat'
|
||||
* available as an exported symbol, so we have to add it explicitly.
|
||||
*/
|
||||
namespace {
|
||||
class StatSymbols {
|
||||
public:
|
||||
StatSymbols() {
|
||||
sys::DynamicLibrary::AddSymbol("stat", (void*)(intptr_t)stat);
|
||||
sys::DynamicLibrary::AddSymbol("fstat", (void*)(intptr_t)fstat);
|
||||
sys::DynamicLibrary::AddSymbol("lstat", (void*)(intptr_t)lstat);
|
||||
sys::DynamicLibrary::AddSymbol("stat64", (void*)(intptr_t)stat64);
|
||||
sys::DynamicLibrary::AddSymbol("\x1stat64", (void*)(intptr_t)stat64);
|
||||
sys::DynamicLibrary::AddSymbol("\x1open64", (void*)(intptr_t)open64);
|
||||
sys::DynamicLibrary::AddSymbol("\x1lseek64", (void*)(intptr_t)lseek64);
|
||||
sys::DynamicLibrary::AddSymbol("fstat64", (void*)(intptr_t)fstat64);
|
||||
sys::DynamicLibrary::AddSymbol("lstat64", (void*)(intptr_t)lstat64);
|
||||
sys::DynamicLibrary::AddSymbol("atexit", (void*)(intptr_t)atexit);
|
||||
sys::DynamicLibrary::AddSymbol("mknod", (void*)(intptr_t)mknod);
|
||||
}
|
||||
};
|
||||
}
|
||||
static StatSymbols initStatSymbols;
|
||||
#endif // __linux__
|
||||
|
||||
// jit_exit - Used to intercept the "exit" library call.
|
||||
static void jit_exit(int Status) {
|
||||
runAtExitHandlers(); // Run atexit handlers...
|
||||
exit(Status);
|
||||
}
|
||||
|
||||
// jit_atexit - Used to intercept the "atexit" library call.
|
||||
static int jit_atexit(void (*Fn)()) {
|
||||
AtExitHandlers.push_back(Fn); // Take note of atexit handler...
|
||||
return 0; // Always successful
|
||||
}
|
||||
|
||||
static int jit_noop() {
|
||||
return 0;
|
||||
}
|
||||
|
||||
//===----------------------------------------------------------------------===//
|
||||
//
|
||||
/// getPointerToNamedFunction - This method returns the address of the specified
|
||||
/// function by using the dynamic loader interface. As such it is only useful
|
||||
/// for resolving library symbols, not code generated symbols.
|
||||
///
|
||||
void *MCJIT::getPointerToNamedFunction(const std::string &Name,
|
||||
bool AbortOnFailure) {
|
||||
if (!isSymbolSearchingDisabled()) {
|
||||
// Check to see if this is one of the functions we want to intercept. Note,
|
||||
// we cast to intptr_t here to silence a -pedantic warning that complains
|
||||
// about casting a function pointer to a normal pointer.
|
||||
if (Name == "exit") return (void*)(intptr_t)&jit_exit;
|
||||
if (Name == "atexit") return (void*)(intptr_t)&jit_atexit;
|
||||
|
||||
// We should not invoke parent's ctors/dtors from generated main()!
|
||||
// On Mingw and Cygwin, the symbol __main is resolved to
|
||||
// callee's(eg. tools/lli) one, to invoke wrong duplicated ctors
|
||||
// (and register wrong callee's dtors with atexit(3)).
|
||||
// We expect ExecutionEngine::runStaticConstructorsDestructors()
|
||||
// is called before ExecutionEngine::runFunctionAsMain() is called.
|
||||
if (Name == "__main") return (void*)(intptr_t)&jit_noop;
|
||||
|
||||
const char *NameStr = Name.c_str();
|
||||
// If this is an asm specifier, skip the sentinal.
|
||||
if (NameStr[0] == 1) ++NameStr;
|
||||
|
||||
// If it's an external function, look it up in the process image...
|
||||
void *Ptr = sys::DynamicLibrary::SearchForAddressOfSymbol(NameStr);
|
||||
if (Ptr) return Ptr;
|
||||
|
||||
// If it wasn't found and if it starts with an underscore ('_') character,
|
||||
// and has an asm specifier, try again without the underscore.
|
||||
if (Name[0] == 1 && NameStr[0] == '_') {
|
||||
Ptr = sys::DynamicLibrary::SearchForAddressOfSymbol(NameStr+1);
|
||||
if (Ptr) return Ptr;
|
||||
}
|
||||
|
||||
// Darwin/PPC adds $LDBLStub suffixes to various symbols like printf. These
|
||||
// are references to hidden visibility symbols that dlsym cannot resolve.
|
||||
// If we have one of these, strip off $LDBLStub and try again.
|
||||
#if defined(__APPLE__) && defined(__ppc__)
|
||||
if (Name.size() > 9 && Name[Name.size()-9] == '$' &&
|
||||
memcmp(&Name[Name.size()-8], "LDBLStub", 8) == 0) {
|
||||
// First try turning $LDBLStub into $LDBL128. If that fails, strip it off.
|
||||
// This mirrors logic in libSystemStubs.a.
|
||||
std::string Prefix = std::string(Name.begin(), Name.end()-9);
|
||||
if (void *Ptr = getPointerToNamedFunction(Prefix+"$LDBL128", false))
|
||||
return Ptr;
|
||||
if (void *Ptr = getPointerToNamedFunction(Prefix, false))
|
||||
return Ptr;
|
||||
}
|
||||
#endif
|
||||
}
|
||||
|
||||
/// If a LazyFunctionCreator is installed, use it to get/create the function.
|
||||
if (LazyFunctionCreator)
|
||||
if (void *RP = LazyFunctionCreator(Name))
|
||||
return RP;
|
||||
|
||||
if (AbortOnFailure) {
|
||||
report_fatal_error("Program used external function '"+Name+
|
||||
"' which could not be resolved!");
|
||||
}
|
||||
return 0;
|
||||
}
|
@ -215,3 +215,23 @@ GenericValue MCJIT::runFunction(Function *F,
|
||||
|
||||
llvm_unreachable("Full-featured argument passing not supported yet!");
|
||||
}
|
||||
|
||||
void *MCJIT::getPointerToNamedFunction(const std::string &Name,
|
||||
bool AbortOnFailure){
|
||||
if (!isSymbolSearchingDisabled() && MemMgr) {
|
||||
void *ptr = MemMgr->getPointerToNamedFunction(Name, false);
|
||||
if (ptr)
|
||||
return ptr;
|
||||
}
|
||||
|
||||
/// If a LazyFunctionCreator is installed, use it to get/create the function.
|
||||
if (LazyFunctionCreator)
|
||||
if (void *RP = LazyFunctionCreator(Name))
|
||||
return RP;
|
||||
|
||||
if (AbortOnFailure) {
|
||||
report_fatal_error("Program used external function '"+Name+
|
||||
"' which could not be resolved!");
|
||||
}
|
||||
return 0;
|
||||
}
|
||||
|
@ -67,6 +67,7 @@ public:
|
||||
///
|
||||
virtual void *getPointerToNamedFunction(const std::string &Name,
|
||||
bool AbortOnFailure = true);
|
||||
|
||||
/// mapSectionAddress - map a section to its target address space value.
|
||||
/// Map the address of a JIT section as returned from the memory manager
|
||||
/// to the address in the target process as the running code will see it.
|
||||
|
@ -27,7 +27,8 @@ class MCJITMemoryManager : public RTDyldMemoryManager {
|
||||
// FIXME: Multiple modules.
|
||||
Module *M;
|
||||
public:
|
||||
MCJITMemoryManager(JITMemoryManager *jmm, Module *m) : JMM(jmm), M(m) {}
|
||||
MCJITMemoryManager(JITMemoryManager *jmm, Module *m) :
|
||||
JMM(jmm?jmm:JITMemoryManager::CreateDefaultMemManager()), M(m) {}
|
||||
// We own the JMM, so make sure to delete it.
|
||||
~MCJITMemoryManager() { delete JMM; }
|
||||
|
||||
@ -41,6 +42,11 @@ public:
|
||||
return JMM->allocateCodeSection(Size, Alignment, SectionID);
|
||||
}
|
||||
|
||||
virtual void *getPointerToNamedFunction(const std::string &Name,
|
||||
bool AbortOnFailure = true) {
|
||||
return JMM->getPointerToNamedFunction(Name, AbortOnFailure);
|
||||
}
|
||||
|
||||
// Allocate ActualSize bytes, or more, for the named function. Return
|
||||
// a pointer to the allocated memory and update Size to reflect how much
|
||||
// memory was acutally allocated.
|
||||
|
@ -61,6 +61,12 @@ public:
|
||||
uint8_t *startFunctionBody(const char *Name, uintptr_t &Size);
|
||||
void endFunctionBody(const char *Name, uint8_t *FunctionStart,
|
||||
uint8_t *FunctionEnd);
|
||||
|
||||
virtual void *getPointerToNamedFunction(const std::string &Name,
|
||||
bool AbortOnFailure = true) {
|
||||
return 0;
|
||||
}
|
||||
|
||||
};
|
||||
|
||||
uint8_t *TrivialMemoryManager::allocateCodeSection(uintptr_t Size,
|
||||
|
@ -64,6 +64,10 @@ public:
|
||||
: Base(JITMemoryManager::CreateDefaultMemManager()) {
|
||||
stubsAllocated = 0;
|
||||
}
|
||||
virtual void *getPointerToNamedFunction(const std::string &Name,
|
||||
bool AbortOnFailure = true) {
|
||||
return Base->getPointerToNamedFunction(Name, AbortOnFailure);
|
||||
}
|
||||
|
||||
virtual void setMemoryWritable() { Base->setMemoryWritable(); }
|
||||
virtual void setMemoryExecutable() { Base->setMemoryExecutable(); }
|
||||
|
Loading…
Reference in New Issue
Block a user