mirror of
https://github.com/darlinghq/darling-cocotron.git
synced 2024-11-23 12:09:51 +00:00
515 lines
15 KiB
C
Executable File
515 lines
15 KiB
C
Executable File
/* Copyright (c) 2006-2007 Christopher J. W. Lloyd
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Permission is hereby granted, free of charge, to any person obtaining a copy of this software and associated documentation files (the "Software"), to deal in the Software without restriction, including without limitation the rights to use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of the Software, and to permit persons to whom the Software is furnished to do so, subject to the following conditions:
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The above copyright notice and this permission notice shall be included in all copies or substantial portions of the Software.
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THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE. */
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#import "ObjCModule.h"
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#import "objc_class.h"
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#import "objc_sel.h"
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#import "objc_log.h"
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#import "objc_malloc.h"
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#import "objc_protocol.h"
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#if defined(__APPLE__)
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#import "OBJCRegisterModule_Darwin.h"
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#endif
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#import <string.h>
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#define INITIAL_CLASS_ARRAY_SIZE 512
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#ifdef SOLARIS
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#import <stdio.h>
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#define PATH_MAX 1024
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#endif
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#ifdef WIN32
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// #import <windows.h>
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#else
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#define __USE_GNU // for dladdr()
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#import <dlfcn.h>
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#import <unistd.h>
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#import <sys/param.h>
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#import <limits.h>
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#endif
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#ifdef BSD
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#import <sys/sysctl.h>
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#endif
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static Class *unresolvedClasses = NULL;
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static int unresolvedClassesSize = 0;
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static Class *sentLoadMessageClasses = NULL;
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static int sentLoadMessageClassesSize = 0;
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static OBJCArray *OBJCObjectFileImageArray(void) {
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static OBJCArray *objectFileImageArray = NULL;
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if(objectFileImageArray == NULL)
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objectFileImageArray = OBJCArrayNew();
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return objectFileImageArray;
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}
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static OBJCObjectFile *OBJCObjectFileWithPath(const char *path) {
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OBJCObjectFile *result = objc_calloc(1, sizeof(OBJCObjectFile));
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result->path = objc_calloc(strlen(path) + 1, sizeof(char));
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strcpy(result->path, path);
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result->moduleArray = OBJCArrayNew();
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return result;
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}
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OBJCObjectFile *OBJCUniqueObjectFileWithPath(const char *path) {
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OBJCObjectFile *result;
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OBJCArray *array = OBJCObjectFileImageArray();
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unsigned long arrayIndex = 0;
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while((result = OBJCArrayEnumerate(array, &arrayIndex)) != NULL) {
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if(strcmp(result->path, path) == 0)
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return result;
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}
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result = OBJCObjectFileWithPath(path);
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OBJCArrayAdd(array, result);
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return result;
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}
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OBJCObjectFile *OBJCObjectFileForPointer(void *ptr) {
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#ifdef WIN32
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// GetModuleHandleEx would work here, but it is only available on XP and above
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return NULL;
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#else
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Dl_info info;
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if(!dladdr(ptr, &info)) {
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OBJCRaiseException("OBJCInternalInconsistencyException", "Can't resolve object file image for module");
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return NULL;
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}
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return OBJCUniqueObjectFileWithPath(info.dli_fname);
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#endif
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}
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void OBJCInitializeProcess() {
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#if defined(__APPLE__)
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OBJCRegisterModule_Darwin(NULL);
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#endif
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}
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OBJCObjectFile *OBJCMainObjectFile() {
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static OBJCObjectFile *mainObjectFile = NULL;
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if(mainObjectFile == NULL) {
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uint32_t length = 0;
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_NSGetExecutablePath(NULL, &length);
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char path[length + 1];
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if(_NSGetExecutablePath(path, &length) < 0)
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path[0] = '\0';
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else
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path[length] = '\0';
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mainObjectFile = OBJCUniqueObjectFileWithPath(path);
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}
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return mainObjectFile;
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}
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void OBJCLinkModuleToActiveObjectFile(OBJCModule *module) {
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OBJCObjectFile *objectFile = OBJCObjectFileForPointer(module);
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if(objectFile == NULL)
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objectFile = OBJCMainObjectFile();
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if(objectFile != NULL)
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OBJCArrayAdd(objectFile->moduleArray, module);
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}
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static OBJCArray *OBJCModuleQueueWithReset(BOOL reset) {
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static OBJCArray *ownershipQueue = NULL;
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OBJCArray *result;
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if(ownershipQueue == NULL)
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ownershipQueue = OBJCArrayNew();
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result = ownershipQueue;
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if(reset)
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ownershipQueue = NULL;
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return result;
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}
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static OBJCArray *OBJCModuleQueue() {
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return OBJCModuleQueueWithReset(NO);
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}
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static void OBJCSymbolTableRegisterSelectors(OBJCSymbolTable *symbolTable) {
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objc_selector_internal *selectorReferences = symbolTable->selectorReferences;
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if(selectorReferences != NULL) {
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while(objc_getSelectorReferenceName(selectorReferences) != NULL) {
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objc_setSelectorReferenceName(&selectorReferences, sel_registerNameNoCopy(objc_getSelectorReferenceName(selectorReferences)));
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selectorReferences++;
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}
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}
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}
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void OBJCAddToUnResolvedClasses(Class class) {
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Class superClass = class->super_class;
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//check for root object
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if(superClass) {
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for(int i = 0; i < unresolvedClassesSize; i++) {
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Class currentClass = unresolvedClasses[i];
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if(currentClass == NULL || currentClass == (Class)-1) {
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unresolvedClasses[i] = class;
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return;
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}
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}
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int newCSize = 0;
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if(unresolvedClassesSize == 0) {
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newCSize = INITIAL_CLASS_ARRAY_SIZE;
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} else {
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newCSize = 2 * unresolvedClassesSize;
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}
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unresolvedClasses = (Class *)realloc(unresolvedClasses, newCSize * sizeof(Class));
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for(int i = unresolvedClassesSize; i < newCSize; i++) {
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unresolvedClasses[i] = NULL;
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}
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unresolvedClasses[unresolvedClassesSize] = class;
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unresolvedClassesSize = newCSize;
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}
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}
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BOOL OBJCCheckClassIsResolved(Class class) {
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if(class->super_class == 0) {
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//root object
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return YES;
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}
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Class superClass;
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if(!(class->info & CLASS_INFO_LINKED)) {
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return NO;
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} else {
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superClass = class_getSuperclass(class);
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}
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if(superClass != Nil) {
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return OBJCCheckClassIsResolved(superClass);
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} else {
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return NO;
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}
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}
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void OBJCSendLoadMessage(Class class) {
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int i = 0;
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for(; i < sentLoadMessageClassesSize; i++) {
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if(sentLoadMessageClasses[i] == NULL) {
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break;
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} else if(sentLoadMessageClasses[i] == class) {
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//message already sent
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return;
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}
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}
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if(class->super_class != 0) {
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//send load first to the superclass
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OBJCSendLoadMessage(class->super_class);
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}
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//check for space and increase size if neeeded
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if(i == sentLoadMessageClassesSize) {
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int newCSize = 0;
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if(sentLoadMessageClassesSize == 0) {
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newCSize = INITIAL_CLASS_ARRAY_SIZE;
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} else {
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newCSize = 2 * sentLoadMessageClassesSize;
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}
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sentLoadMessageClasses = (Class *)realloc(sentLoadMessageClasses, newCSize * sizeof(Class));
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for(int j = sentLoadMessageClassesSize; j < newCSize; j++) {
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sentLoadMessageClasses[j] = NULL;
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}
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sentLoadMessageClasses[sentLoadMessageClassesSize] = class;
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sentLoadMessageClassesSize = newCSize;
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} else {
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sentLoadMessageClasses[i] = class;
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}
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SEL loadSelector = sel_registerName("load");
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Method m = class_getClassMethod(class, loadSelector);
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if(m) {
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IMP imp = method_getImplementation(m);
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if(imp) {
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(*imp)((id) class, loadSelector);
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}
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}
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}
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void OBJCSendLoadMessages() {
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//until NSObject is not in runtime we don't need to check
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if(objc_lookUpClass("NSObject") == Nil) {
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return;
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}
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for(int i = 0; i < unresolvedClassesSize; i++) {
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Class class = unresolvedClasses[i];
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if(class == NULL) {
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continue;
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}
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if(OBJCCheckClassIsResolved(class) == YES) {
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//remove it from unresolved
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unresolvedClasses[i] = NULL;
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} else {
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//still unresolved classes, wait for more classes
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return;
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}
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}
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int i, capacity = objc_getClassList(NULL, 0);
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Class list[capacity];
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objc_getClassList(list, capacity);
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for(i = 0; i < capacity; i++) {
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OBJCSendLoadMessage(list[i]);
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}
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}
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static void OBJCSymbolTableRegisterClasses(OBJCSymbolTable *symbolTable) {
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unsigned i, count = symbolTable->classCount;
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for(i = 0; i < count; i++) {
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struct objc_class *class = (struct objc_class *)symbolTable->definitions[i];
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// mark class and metaclass as having a direct method list pointer
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class->info |= CLASS_NO_METHOD_ARRAY;
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class->isa->info |= CLASS_NO_METHOD_ARRAY;
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OBJCRegisterClass(class);
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OBJCAddToUnResolvedClasses(class);
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if(strcmp(class_getName(class), "Protocol") == 0) {
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// Fix protocol classes where isa is not yet set. This is the case for all
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// classes loaded before Protocol class is loaded.
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int i, capacity = objc_getClassList(NULL, 0);
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Class list[capacity];
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objc_getClassList(list, capacity);
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for(i = 0; i < capacity; i++) {
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Class class = list[i];
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struct objc_protocol_list *protocols;
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for(protocols = class->protocols; protocols != NULL; protocols = protocols->next) {
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unsigned i;
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for(i = 0; i < protocols->count; i++) {
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OBJCProtocolTemplate *template = (OBJCProtocolTemplate *)protocols->list[i];
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OBJCRegisterProtocol(template);
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}
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}
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}
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}
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}
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}
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static void OBJCSymbolTableRegisterCategories(OBJCSymbolTable *symbolTable) {
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static OBJCArray *unlinkedCategories = NULL;
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unsigned offset = symbolTable->classCount;
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unsigned i, count = symbolTable->categoryCount;
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if(unlinkedCategories != NULL && objc_lookUpClass("Protocol") != Nil) {
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int unlinkedIndex = unlinkedCategories->count;
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while(--unlinkedIndex >= 0) {
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Category category = OBJCArrayItemAtIndex(unlinkedCategories, unlinkedIndex);
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Class class = (Class)objc_lookUpClass(category->className);
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if(class != Nil) {
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OBJCRegisterCategoryInClass(category, class);
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OBJCArrayRemoveItemAtIndex(unlinkedCategories, unlinkedIndex);
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}
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}
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}
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for(i = 0; i < count; i++) {
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Category category = (Category)symbolTable->definitions[offset + i];
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Class class = (Class)objc_lookUpClass(category->className);
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if(class != Nil && objc_lookUpClass("Protocol") != Nil)
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OBJCRegisterCategoryInClass(category, class);
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else {
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if(unlinkedCategories == NULL)
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unlinkedCategories = OBJCArrayNew();
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OBJCArrayAdd(unlinkedCategories, category);
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}
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}
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}
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// GNU style for now
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static void OBJCSymbolTableRegisterStringsIfNeeded(OBJCSymbolTable *symbolTable) {
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static OBJCArray *unlinkedObjects = NULL;
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unsigned long offset = symbolTable->classCount + symbolTable->categoryCount;
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OBJCStaticInstanceList **listOfLists = symbolTable->definitions[offset];
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if(unlinkedObjects != NULL) {
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int count = unlinkedObjects->count;
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while(--count >= 0) {
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OBJCStaticInstanceList *staticInstances = OBJCArrayItemAtIndex(unlinkedObjects, count);
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Class class = (Class)objc_lookUpClass(staticInstances->name);
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if(class != Nil) {
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unsigned i;
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for(i = 0; staticInstances->instances[i] != nil; i++)
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object_setClass(staticInstances->instances[i], class);
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OBJCArrayRemoveItemAtIndex(unlinkedObjects, count);
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}
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}
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}
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if(listOfLists != NULL) {
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for(; *listOfLists != NULL; listOfLists++) {
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OBJCStaticInstanceList *staticInstances = *listOfLists;
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Class class = (Class)objc_lookUpClass(staticInstances->name);
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unsigned i;
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if(class != Nil) {
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for(i = 0; staticInstances->instances[i] != nil; i++)
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object_setClass(staticInstances->instances[i], class);
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} else {
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if(unlinkedObjects == NULL)
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unlinkedObjects = OBJCArrayNew();
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OBJCArrayAdd(unlinkedObjects, staticInstances);
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}
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}
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}
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}
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static void OBJCSymbolTableRegisterProtocolsIfNeeded(OBJCSymbolTable *symbolTable) {
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// FIX or address issue
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#if 0
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// this needs to handle unknown protocol class
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unsigned offset=symbolTable->classCount+symbolTable->categoryCount+symbolTable->objectDefCount;
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unsigned i,count=symbolTable->protocolDefCount;
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for(i=0;i<count;i++){
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OBJCProtocolTemplate *template=(OBJCProtocolTemplate *)symbolTable->definitions[offset+i];
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OBJCRegisterProtocol(template);
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}
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#endif
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}
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void OBJCQueueModule(OBJCModule *module) {
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if(module->symbolTable != NULL) {
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OBJCArrayAdd(OBJCModuleQueue(), module);
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OBJCLinkModuleToActiveObjectFile(module);
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OBJCSymbolTableRegisterSelectors(module->symbolTable);
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OBJCSymbolTableRegisterClasses(module->symbolTable);
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OBJCSymbolTableRegisterCategories(module->symbolTable);
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#if !defined(__APPLE__)
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OBJCSymbolTableRegisterStringsIfNeeded(module->symbolTable);
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OBJCSymbolTableRegisterProtocolsIfNeeded(module->symbolTable);
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#endif
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OBJCLinkClassTable();
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#if !defined(__APPLE__)
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OBJCSendLoadMessages();
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#endif
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}
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}
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void OBJCResetModuleQueue(void) {
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OBJCArray *queue = OBJCModuleQueueWithReset(YES);
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OBJCArrayDealloc(queue);
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}
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void OBJCLinkQueuedModulesToObjectFileWithPath(const char *path) {
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OBJCObjectFile *objectFile = OBJCUniqueObjectFileWithPath(path);
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OBJCArray *queue = OBJCModuleQueueWithReset(YES);
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OBJCModule *module;
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unsigned long state = 0;
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while((module = OBJCArrayEnumerate(queue, &state)) != NULL)
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OBJCArrayAdd(objectFile->moduleArray, module);
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OBJCArrayDealloc(queue);
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}
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OBJCObjectFile *OBJCObjectFileFromClass(Class class) {
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OBJCArray *array = OBJCObjectFileImageArray();
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int count = array->count;
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while(--count >= 0) {
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OBJCObjectFile *objectFile = OBJCArrayItemAtIndex(array, count);
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OBJCModule *module;
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unsigned long moduleIndex = 0;
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while((module = OBJCArrayEnumerate(objectFile->moduleArray, &moduleIndex)) != NULL) {
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unsigned classIndex;
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if(module->symbolTable != NULL) {
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for(classIndex = 0; classIndex < module->symbolTable->classCount; classIndex++) {
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if(module->symbolTable->definitions[classIndex] == class) {
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return objectFile;
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}
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}
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}
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}
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}
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return NULL;
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}
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const char *class_getImageName(Class cls) {
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OBJCObjectFile *file = OBJCObjectFileFromClass(cls);
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if(file)
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return file->path;
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return NULL;
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}
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const char *objc_mainImageName() {
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OBJCObjectFile *file = OBJCMainObjectFile();
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if(file != NULL)
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return file->path;
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return NULL;
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}
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const char **objc_copyImageNames(unsigned *countp) {
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OBJCArray *array = OBJCObjectFileImageArray();
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unsigned long arrayIndex = 0, count = OBJCArrayCount(array);
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const char **result = malloc(count * sizeof(char *));
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OBJCObjectFile *objectFile;
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while((objectFile = OBJCArrayEnumerate(array, &arrayIndex)) != NULL)
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result[arrayIndex - 1] = objectFile->path;
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*countp = count;
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return result;
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}
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