129 lines
4.4 KiB
Plaintext
129 lines
4.4 KiB
Plaintext
// Copyright (c) 2011 The Chromium Authors. All rights reserved.
|
|
// Use of this source code is governed by a BSD-style license that can be
|
|
// found in the LICENSE file.
|
|
|
|
#include "base/native_library.h"
|
|
|
|
#include <dlfcn.h>
|
|
#include <mach-o/getsect.h>
|
|
|
|
#include "base/files/file_path.h"
|
|
#include "base/files/file_util.h"
|
|
#include "base/logging.h"
|
|
#include "base/mac/scoped_cftyperef.h"
|
|
#include "base/strings/string_util.h"
|
|
#include "base/strings/utf_string_conversions.h"
|
|
#include "base/threading/thread_restrictions.h"
|
|
|
|
namespace base {
|
|
|
|
static NativeLibraryObjCStatus GetObjCStatusForImage(
|
|
const void* function_pointer) {
|
|
Dl_info info;
|
|
if (!dladdr(function_pointer, &info))
|
|
return OBJC_UNKNOWN;
|
|
|
|
// See if the the image contains an "ObjC image info" segment. This method
|
|
// of testing is used in _CFBundleGrokObjcImageInfoFromFile in
|
|
// CF-744/CFBundle.c, around lines 2447-2474.
|
|
//
|
|
// In 64-bit images, ObjC can be recognized in __DATA,__objc_imageinfo.
|
|
const section_64* section = getsectbynamefromheader_64(
|
|
reinterpret_cast<const struct mach_header_64*>(info.dli_fbase),
|
|
SEG_DATA, "__objc_imageinfo");
|
|
return section ? OBJC_PRESENT : OBJC_NOT_PRESENT;
|
|
}
|
|
|
|
std::string NativeLibraryLoadError::ToString() const {
|
|
return message;
|
|
}
|
|
|
|
NativeLibrary LoadNativeLibraryWithOptions(const FilePath& library_path,
|
|
const NativeLibraryOptions& options,
|
|
NativeLibraryLoadError* error) {
|
|
// dlopen() etc. open the file off disk.
|
|
if (library_path.Extension() == "dylib" || !DirectoryExists(library_path)) {
|
|
void* dylib = dlopen(library_path.value().c_str(), RTLD_LAZY);
|
|
if (!dylib) {
|
|
if (error)
|
|
error->message = dlerror();
|
|
return nullptr;
|
|
}
|
|
NativeLibrary native_lib = new NativeLibraryStruct();
|
|
native_lib->type = DYNAMIC_LIB;
|
|
native_lib->dylib = dylib;
|
|
native_lib->objc_status = OBJC_UNKNOWN;
|
|
return native_lib;
|
|
}
|
|
ScopedCFTypeRef<CFURLRef> url(CFURLCreateFromFileSystemRepresentation(
|
|
kCFAllocatorDefault,
|
|
(const UInt8*)library_path.value().c_str(),
|
|
library_path.value().length(),
|
|
true));
|
|
if (!url)
|
|
return nullptr;
|
|
CFBundleRef bundle = CFBundleCreate(kCFAllocatorDefault, url.get());
|
|
if (!bundle)
|
|
return nullptr;
|
|
|
|
NativeLibrary native_lib = new NativeLibraryStruct();
|
|
native_lib->type = BUNDLE;
|
|
native_lib->bundle = bundle;
|
|
native_lib->bundle_resource_ref = CFBundleOpenBundleResourceMap(bundle);
|
|
native_lib->objc_status = OBJC_UNKNOWN;
|
|
return native_lib;
|
|
}
|
|
|
|
void UnloadNativeLibrary(NativeLibrary library) {
|
|
if (library->objc_status == OBJC_NOT_PRESENT) {
|
|
if (library->type == BUNDLE) {
|
|
CFBundleCloseBundleResourceMap(library->bundle,
|
|
library->bundle_resource_ref);
|
|
CFRelease(library->bundle);
|
|
} else {
|
|
dlclose(library->dylib);
|
|
}
|
|
} else {
|
|
VLOG(2) << "Not unloading NativeLibrary because it may contain an ObjC "
|
|
"segment. library->objc_status = " << library->objc_status;
|
|
// Deliberately do not CFRelease the bundle or dlclose the dylib because
|
|
// doing so can corrupt the ObjC runtime method caches. See
|
|
// http://crbug.com/172319 for details.
|
|
}
|
|
delete library;
|
|
}
|
|
|
|
void* GetFunctionPointerFromNativeLibrary(NativeLibrary library,
|
|
StringPiece name) {
|
|
void* function_pointer = nullptr;
|
|
|
|
// Get the function pointer using the right API for the type.
|
|
if (library->type == BUNDLE) {
|
|
ScopedCFTypeRef<CFStringRef> symbol_name(CFStringCreateWithCString(
|
|
kCFAllocatorDefault, name.data(), kCFStringEncodingUTF8));
|
|
function_pointer = CFBundleGetFunctionPointerForName(library->bundle,
|
|
symbol_name);
|
|
} else {
|
|
function_pointer = dlsym(library->dylib, name.data());
|
|
}
|
|
|
|
// If this library hasn't been tested for having ObjC, use the function
|
|
// pointer to look up the section information for the library.
|
|
if (function_pointer && library->objc_status == OBJC_UNKNOWN)
|
|
library->objc_status = GetObjCStatusForImage(function_pointer);
|
|
|
|
return function_pointer;
|
|
}
|
|
|
|
std::string GetNativeLibraryName(StringPiece name) {
|
|
DCHECK(IsStringASCII(name));
|
|
return "lib" + name.as_string() + ".dylib";
|
|
}
|
|
|
|
std::string GetLoadableModuleName(StringPiece name) {
|
|
DCHECK(IsStringASCII(name));
|
|
return name.as_string() + ".so";
|
|
}
|
|
|
|
} // namespace base
|