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Roll out r182411 and 182412 because it's still broken.

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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@182415 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Filip Pizlo 2013-05-21 20:17:14 +00:00
parent f904921059
commit 50f19a906a
7 changed files with 159 additions and 193 deletions
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76
include/llvm/ExecutionEngine/RTDyldMemoryManager.h
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@ -1,76 +0,0 @@
//===-- RTDyldMemoryManager.cpp - Memory manager for MC-JIT -----*- C++ -*-===//
//
// The LLVM Compiler Infrastructure
//
// This file is distributed under the University of Illinois Open Source
// License. See LICENSE.TXT for details.
//
//===----------------------------------------------------------------------===//
//
// Interface of the runtime dynamic memory manager base class.
//
//===----------------------------------------------------------------------===//
#ifndef LLVM_EXECUTIONENGINE_RT_DYLD_MEMORY_MANAGER_H
#define LLVM_EXECUTIONENGINE_RT_DYLD_MEMORY_MANAGER_H
#include "llvm/ADT/StringRef.h"
#include "llvm/Support/CBindingWrapping.h"
#include "llvm/Support/Memory.h"
#include "llvm-c/ExecutionEngine.h"
namespace llvm {
// RuntimeDyld clients often want to handle the memory management of
// what gets placed where. For JIT clients, this is the subset of
// JITMemoryManager required for dynamic loading of binaries.
//
// FIXME: As the RuntimeDyld fills out, additional routines will be needed
// for the varying types of objects to be allocated.
class RTDyldMemoryManager {
RTDyldMemoryManager(const RTDyldMemoryManager&) LLVM_DELETED_FUNCTION;
void operator=(const RTDyldMemoryManager&) LLVM_DELETED_FUNCTION;
public:
RTDyldMemoryManager() {}
virtual ~RTDyldMemoryManager();
/// Allocate a memory block of (at least) the given size suitable for
/// executable code. The SectionID is a unique identifier assigned by the JIT
/// engine, and optionally recorded by the memory manager to access a loaded
/// section.
virtual uint8_t *allocateCodeSection(uintptr_t Size, unsigned Alignment,
unsigned SectionID) = 0;
/// Allocate a memory block of (at least) the given size suitable for data.
/// The SectionID is a unique identifier assigned by the JIT engine, and
/// optionally recorded by the memory manager to access a loaded section.
virtual uint8_t *allocateDataSection(uintptr_t Size, unsigned Alignment,
unsigned SectionID, bool IsReadOnly) = 0;
/// Register the EH frames with the runtime so that c++ exceptions work.
virtual void registerEHFrames(StringRef SectionData);
/// This method returns the address of the specified function. As such it is
/// only useful for resolving library symbols, not code generated symbols.
///
/// If \p AbortOnFailure is false and no function with the given name is
/// found, this function returns a null pointer. Otherwise, it prints a
/// message to stderr and aborts.
virtual void *getPointerToNamedFunction(const std::string &Name,
bool AbortOnFailure = true);
/// This method is called when object loading is complete and section page
/// permissions can be applied. It is up to the memory manager implementation
/// to decide whether or not to act on this method. The memory manager will
/// typically allocate all sections as read-write and then apply specific
/// permissions when this method is called. Code sections cannot be executed
/// until this function has been called. In addition, any cache coherency
/// operations needed to reliably use the memory are also performed.
///
/// Returns true if an error occurred, false otherwise.
virtual bool finalizeMemory(std::string *ErrMsg = 0) = 0;
};
} // namespace llvm
#endif // LLVM_EXECUTIONENGINE_RT_DYLD_MEMORY_MANAGER_H

53
include/llvm/ExecutionEngine/RuntimeDyld.h
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@ -16,7 +16,6 @@
#include "llvm/ADT/StringRef.h"
#include "llvm/ExecutionEngine/ObjectBuffer.h"
#include "llvm/ExecutionEngine/RTDyldMemoryManager.h"
#include "llvm/Support/Memory.h"
namespace llvm {
@ -24,6 +23,58 @@ namespace llvm {
class RuntimeDyldImpl;
class ObjectImage;
// RuntimeDyld clients often want to handle the memory management of
// what gets placed where. For JIT clients, this is the subset of
// JITMemoryManager required for dynamic loading of binaries.
//
// FIXME: As the RuntimeDyld fills out, additional routines will be needed
// for the varying types of objects to be allocated.
class RTDyldMemoryManager {
RTDyldMemoryManager(const RTDyldMemoryManager&) LLVM_DELETED_FUNCTION;
void operator=(const RTDyldMemoryManager&) LLVM_DELETED_FUNCTION;
public:
RTDyldMemoryManager() {}
virtual ~RTDyldMemoryManager();
/// Allocate a memory block of (at least) the given size suitable for
/// executable code. The SectionID is a unique identifier assigned by the JIT
/// engine, and optionally recorded by the memory manager to access a loaded
/// section.
virtual uint8_t *allocateCodeSection(uintptr_t Size, unsigned Alignment,
unsigned SectionID) = 0;
/// Allocate a memory block of (at least) the given size suitable for data.
/// The SectionID is a unique identifier assigned by the JIT engine, and
/// optionally recorded by the memory manager to access a loaded section.
virtual uint8_t *allocateDataSection(uintptr_t Size, unsigned Alignment,
unsigned SectionID, bool IsReadOnly) = 0;
/// This method returns the address of the specified function. As such it is
/// only useful for resolving library symbols, not code generated symbols.
///
/// If AbortOnFailure is false and no function with the given name is
/// found, this function returns a null pointer. Otherwise, it prints a
/// message to stderr and aborts.
virtual void *getPointerToNamedFunction(const std::string &Name,
bool AbortOnFailure = true) = 0;
/// This method is called when object loading is complete and section page
/// permissions can be applied. It is up to the memory manager implementation
/// to decide whether or not to act on this method. The memory manager will
/// typically allocate all sections as read-write and then apply specific
/// permissions when this method is called. Code sections cannot be executed
/// until this function has been called. In addition, any cache coherency
/// operations needed to reliably use the memory are also performed.
///
/// Returns true if an error occurred, false otherwise.
virtual bool finalizeMemory(std::string *ErrMsg = 0) = 0;
/// Register the EH frames with the runtime so that c++ exceptions work. The
/// default implementation does nothing. Look at SectionMemoryManager for one
/// that uses __register_frame.
virtual void registerEHFrames(StringRef SectionData);
};
class RuntimeDyld {
RuntimeDyld(const RuntimeDyld &) LLVM_DELETED_FUNCTION;
void operator=(const RuntimeDyld &) LLVM_DELETED_FUNCTION;

11
include/llvm/ExecutionEngine/SectionMemoryManager.h
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@ -73,6 +73,17 @@ public:
/// \returns true if an error occurred, false otherwise.
virtual bool finalizeMemory(std::string *ErrMsg = 0);
void registerEHFrames(StringRef SectionData);
/// This method returns the address of the specified function. As such it is
/// only useful for resolving library symbols, not code generated symbols.
///
/// If \p AbortOnFailure is false and no function with the given name is
/// found, this function returns a null pointer. Otherwise, it prints a
/// message to stderr and aborts.
virtual void *getPointerToNamedFunction(const std::string &Name,
bool AbortOnFailure = true);
/// \brief Invalidate instruction cache for code sections.
///
/// Some platforms with separate data cache and instruction cache require

1
lib/ExecutionEngine/CMakeLists.txt
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@ -3,7 +3,6 @@
add_llvm_library(LLVMExecutionEngine
ExecutionEngine.cpp
ExecutionEngineBindings.cpp
RTDyldMemoryManager.cpp
TargetSelect.cpp
)

94
lib/ExecutionEngine/MCJIT/SectionMemoryManager.cpp
View File

@ -14,8 +14,19 @@
#include "llvm/Config/config.h"
#include "llvm/ExecutionEngine/SectionMemoryManager.h"
#include "llvm/Support/DynamicLibrary.h"
#include "llvm/Support/MathExtras.h"
#ifdef __linux__
// These includes used by SectionMemoryManager::getPointerToNamedFunction()
// for Glibc trickery. See comments in this function for more information.
#ifdef HAVE_SYS_STAT_H
#include <sys/stat.h>
#endif
#include <fcntl.h>
#include <unistd.h>
#endif
namespace llvm {
uint8_t *SectionMemoryManager::allocateDataSection(uintptr_t Size,
@ -135,6 +146,38 @@ bool SectionMemoryManager::finalizeMemory(std::string *ErrMsg)
return false;
}
// Determine whether we can register EH tables.
#if (defined(__GNUC__) && !defined(__ARM_EABI__) && \
!defined(__USING_SJLJ_EXCEPTIONS__))
#define HAVE_EHTABLE_SUPPORT 1
#else
#define HAVE_EHTABLE_SUPPORT 0
#endif
#if HAVE_EHTABLE_SUPPORT
extern "C" void __register_frame(void*);
static const char *processFDE(const char *Entry) {
const char *P = Entry;
uint32_t Length = *((uint32_t*)P);
P += 4;
uint32_t Offset = *((uint32_t*)P);
if (Offset != 0)
__register_frame((void*)Entry);
return P + Length;
}
#endif
void SectionMemoryManager::registerEHFrames(StringRef SectionData) {
#if HAVE_EHTABLE_SUPPORT
const char *P = SectionData.data();
const char *End = SectionData.data() + SectionData.size();
do {
P = processFDE(P);
} while(P != End);
#endif
}
error_code SectionMemoryManager::applyMemoryGroupPermissions(MemoryGroup &MemGroup,
unsigned Permissions) {
@ -156,6 +199,57 @@ void SectionMemoryManager::invalidateInstructionCache() {
CodeMem.AllocatedMem[i].size());
}
static int jit_noop() {
return 0;
}
void *SectionMemoryManager::getPointerToNamedFunction(const std::string &Name,
bool AbortOnFailure) {
#if defined(__linux__)
//===--------------------------------------------------------------------===//
// 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 (Name == "stat") return (void*)(intptr_t)&stat;
if (Name == "fstat") return (void*)(intptr_t)&fstat;
if (Name == "lstat") return (void*)(intptr_t)&lstat;
if (Name == "stat64") return (void*)(intptr_t)&stat64;
if (Name == "fstat64") return (void*)(intptr_t)&fstat64;
if (Name == "lstat64") return (void*)(intptr_t)&lstat64;
if (Name == "atexit") return (void*)(intptr_t)&atexit;
if (Name == "mknod") return (void*)(intptr_t)&mknod;
#endif // __linux__
// 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();
void *Ptr = sys::DynamicLibrary::SearchForAddressOfSymbol(NameStr);
if (Ptr) return Ptr;
// If it wasn't found and if it starts with an underscore ('_') character,
// try again without the underscore.
if (NameStr[0] == '_') {
Ptr = sys::DynamicLibrary::SearchForAddressOfSymbol(NameStr+1);
if (Ptr) return Ptr;
}
if (AbortOnFailure)
report_fatal_error("Program used external function '" + Name +
"' which could not be resolved!");
return 0;
}
SectionMemoryManager::~SectionMemoryManager() {
for (unsigned i = 0, e = CodeMem.AllocatedMem.size(); i != e; ++i)
sys::Memory::releaseMappedMemory(CodeMem.AllocatedMem[i]);

115
lib/ExecutionEngine/RTDyldMemoryManager.cpp
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@ -1,115 +0,0 @@
//===-- RTDyldMemoryManager.cpp - Memory manager for MC-JIT -----*- C++ -*-===//
//
// The LLVM Compiler Infrastructure
//
// This file is distributed under the University of Illinois Open Source
// License. See LICENSE.TXT for details.
//
//===----------------------------------------------------------------------===//
//
// Implementation of the runtime dynamic memory manager base class.
//
//===----------------------------------------------------------------------===//
#include "llvm/ExecutionEngine/RTDyldMemoryManager.h"
#include "llvm/Support/DynamicLibrary.h"
#include "llvm/Support/ErrorHandling.h"
#ifdef __linux__
// These includes used by RTDyldMemoryManager::getPointerToNamedFunction()
// for Glibc trickery. See comments in this function for more information.
#ifdef HAVE_SYS_STAT_H
#include <sys/stat.h>
#endif
#include <fcntl.h>
#include <unistd.h>
#endif
namespace llvm {
RTDyldMemoryManager::~RTDyldMemoryManager() {}
// Determine whether we can register EH tables.
#if (defined(__GNUC__) && !defined(__ARM_EABI__) && \
!defined(__USING_SJLJ_EXCEPTIONS__))
#define HAVE_EHTABLE_SUPPORT 1
#else
#define HAVE_EHTABLE_SUPPORT 0
#endif
#if HAVE_EHTABLE_SUPPORT
extern "C" void __register_frame(void*);
static const char *processFDE(const char *Entry) {
const char *P = Entry;
uint32_t Length = *((uint32_t*)P);
P += 4;
uint32_t Offset = *((uint32_t*)P);
if (Offset != 0)
__register_frame((void*)Entry);
return P + Length;
}
#endif
void RTDyldMemoryManager::registerEHFrames(StringRef SectionData) {
#if HAVE_EHTABLE_SUPPORT
const char *P = SectionData.data();
const char *End = SectionData.data() + SectionData.size();
do {
P = processFDE(P);
} while(P != End);
#endif
}
static int jit_noop() {
return 0;
}
void *RTDyldMemoryManager::getPointerToNamedFunction(const std::string &Name,
bool AbortOnFailure) {
#if defined(__linux__)
//===--------------------------------------------------------------------===//
// 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 (Name == "stat") return (void*)(intptr_t)&stat;
if (Name == "fstat") return (void*)(intptr_t)&fstat;
if (Name == "lstat") return (void*)(intptr_t)&lstat;
if (Name == "stat64") return (void*)(intptr_t)&stat64;
if (Name == "fstat64") return (void*)(intptr_t)&fstat64;
if (Name == "lstat64") return (void*)(intptr_t)&lstat64;
if (Name == "atexit") return (void*)(intptr_t)&atexit;
if (Name == "mknod") return (void*)(intptr_t)&mknod;
#endif // __linux__
// 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();
void *Ptr = sys::DynamicLibrary::SearchForAddressOfSymbol(NameStr);
if (Ptr) return Ptr;
// If it wasn't found and if it starts with an underscore ('_') character,
// try again without the underscore.
if (NameStr[0] == '_') {
Ptr = sys::DynamicLibrary::SearchForAddressOfSymbol(NameStr+1);
if (Ptr) return Ptr;
}
if (AbortOnFailure)
report_fatal_error("Program used external function '" + Name +
"' which could not be resolved!");
return 0;
}
} // namespace llvm

2
lib/ExecutionEngine/RuntimeDyld/RuntimeDyld.cpp
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@ -24,6 +24,8 @@ using namespace llvm;
using namespace llvm::object;
// Empty out-of-line virtual destructor as the key function.
RTDyldMemoryManager::~RTDyldMemoryManager() {}
void RTDyldMemoryManager::registerEHFrames(StringRef SectionData) {}
RuntimeDyldImpl::~RuntimeDyldImpl() {}
namespace llvm {