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去掉对于fishhook的依赖
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yixiangboy committed Mar 18, 2020
1 parent 0d58425 commit 90fdd54
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Showing 8 changed files with 312 additions and 59 deletions.
3 changes: 0 additions & 3 deletions DoraemonKit.podspec
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Expand Up @@ -83,8 +83,5 @@ Pod::Spec.new do |s|
ss.dependency 'DoraemonKit/Core'
#ss.dependency 'FBRetainCycleDetector'
end

s.dependency 'fishhook'

end

Original file line number Diff line number Diff line change
Expand Up @@ -6,11 +6,7 @@
//

#import "DoraemonNSLogManager.h"
#if __has_include(<fishhook/fishhook.h>)
#include <fishhook/fishhook.h>
#else
#include "fishhook.h"
#endif
#import "doraemon_fishhook.h"

//函数指针,用来保存原始的函数的地址
static void(*old_nslog)(NSString *format, ...);
Expand Down Expand Up @@ -43,11 +39,11 @@ + (instancetype)sharedInstance {
}

- (void)startNSLogMonitor{
rebind_symbols((struct rebinding[1]){"NSLog", (void *)myNSLog, (void **)&old_nslog},1);
doraemon_rebind_symbols((struct doraemon_rebinding[1]){"NSLog", (void *)myNSLog, (void **)&old_nslog},1);
}

- (void)stopNSLogMonitor{
rebind_symbols((struct rebinding[1]){"NSLog", (void *)old_nslog, NULL},1);
doraemon_rebind_symbols((struct doraemon_rebinding[1]){"NSLog", (void *)old_nslog, NULL},1);
}

- (void)addNSLog:(NSString *)log{
Expand Down
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Expand Up @@ -13,12 +13,7 @@
#include <sys/time.h>
#include <objc/runtime.h>
#include <dispatch/dispatch.h>

#if __has_include(<fishhook/fishhook.h>)
#include <fishhook/fishhook.h>
#else
#include "fishhook.h"
#endif
#include "doraemon_fishhook.h"

static bool _call_record_enabled = true;
static uint64_t _min_time_cost = 1000; //us
Expand Down Expand Up @@ -223,12 +218,12 @@ void dtp_hook_begin(void) {
// rebind_symbols((struct rebinding[1]){"objc_msgSend", (void *)hook_objc_msgSend, (void **)&orig_objc_msgSend},1);
// });
pthread_key_create(&_thread_key, &release_thread_call_stack);
rebind_symbols((struct rebinding[1]){"objc_msgSend", (void *)hook_objc_msgSend, (void **)&orig_objc_msgSend},1);
doraemon_rebind_symbols((struct doraemon_rebinding[1]){"objc_msgSend", (void *)hook_objc_msgSend, (void **)&orig_objc_msgSend},1);
}

void dtp_hook_end(void) {
_call_record_enabled = false;
rebind_symbols((struct rebinding[1]){"objc_msgSend", (void *)orig_objc_msgSend, NULL},1);
doraemon_rebind_symbols((struct doraemon_rebinding[1]){"objc_msgSend", (void *)orig_objc_msgSend, NULL},1);
}

void dtp_set_min_time(uint64_t us) {
Expand Down
242 changes: 242 additions & 0 deletions iOS/DoraemonKit/Src/Core/Util/fishhook/doraemon_fishhook.c
Original file line number Diff line number Diff line change
@@ -0,0 +1,242 @@
//
// doraemon_fishhook.c
// DoraemonKit-DoraemonKit
//
// Created by didi on 2020/3/18.
//

#include "doraemon_fishhook.h"

#include <dlfcn.h>
#include <stdbool.h>
#include <stdlib.h>
#include <string.h>
#include <sys/mman.h>
#include <sys/types.h>
#include <mach/mach.h>
#include <mach/vm_map.h>
#include <mach/vm_region.h>
#include <mach-o/dyld.h>
#include <mach-o/loader.h>
#include <mach-o/nlist.h>

#ifdef __LP64__
typedef struct mach_header_64 mach_header_t;
typedef struct segment_command_64 segment_command_t;
typedef struct section_64 section_t;
typedef struct nlist_64 nlist_t;
#define LC_SEGMENT_ARCH_DEPENDENT LC_SEGMENT_64
#else
typedef struct mach_header mach_header_t;
typedef struct segment_command segment_command_t;
typedef struct section section_t;
typedef struct nlist nlist_t;
#define LC_SEGMENT_ARCH_DEPENDENT LC_SEGMENT
#endif

#ifndef SEG_DATA_CONST
#define SEG_DATA_CONST "__DATA_CONST"
#endif

struct doraemon_rebindings_entry {
struct doraemon_rebinding *rebindings;
size_t rebindings_nel;
struct doraemon_rebindings_entry *next;
};

static struct doraemon_rebindings_entry *_rebindings_head;

static int doraemon_prepend_rebindings(struct doraemon_rebindings_entry **rebindings_head,
struct doraemon_rebinding rebindings[],
size_t nel) {
struct doraemon_rebindings_entry *new_entry = (struct doraemon_rebindings_entry *) malloc(sizeof(struct doraemon_rebindings_entry));
if (!new_entry) {
return -1;
}
new_entry->rebindings = (struct doraemon_rebinding *) malloc(sizeof(struct doraemon_rebinding) * nel);
if (!new_entry->rebindings) {
free(new_entry);
return -1;
}
memcpy(new_entry->rebindings, rebindings, sizeof(struct doraemon_rebinding) * nel);
new_entry->rebindings_nel = nel;
new_entry->next = *rebindings_head;
*rebindings_head = new_entry;
return 0;
}

static vm_prot_t doraemon_get_protection(void *sectionStart) {
mach_port_t task = mach_task_self();
vm_size_t size = 0;
vm_address_t address = (vm_address_t)sectionStart;
memory_object_name_t object;
#if __LP64__
mach_msg_type_number_t count = VM_REGION_BASIC_INFO_COUNT_64;
vm_region_basic_info_data_64_t info;
kern_return_t info_ret = vm_region_64(
task, &address, &size, VM_REGION_BASIC_INFO_64, (vm_region_info_64_t)&info, &count, &object);
#else
mach_msg_type_number_t count = VM_REGION_BASIC_INFO_COUNT;
vm_region_basic_info_data_t info;
kern_return_t info_ret = vm_region(task, &address, &size, VM_REGION_BASIC_INFO, (vm_region_info_t)&info, &count, &object);
#endif
if (info_ret == KERN_SUCCESS) {
return info.protection;
} else {
return VM_PROT_READ;
}
}

static void doraemon_perform_rebinding_with_section(struct doraemon_rebindings_entry *rebindings,
section_t *section,
intptr_t slide,
nlist_t *symtab,
char *strtab,
uint32_t *indirect_symtab) {
const bool isDataConst = strcmp(section->segname, "__DATA_CONST") == 0;
uint32_t *indirect_symbol_indices = indirect_symtab + section->reserved1;
void **indirect_symbol_bindings = (void **)((uintptr_t)slide + section->addr);
vm_prot_t oldProtection = VM_PROT_READ;
if (isDataConst) {
oldProtection = doraemon_get_protection(rebindings);
mprotect(indirect_symbol_bindings, section->size, PROT_READ | PROT_WRITE);
}
for (uint i = 0; i < section->size / sizeof(void *); i++) {
uint32_t symtab_index = indirect_symbol_indices[i];
if (symtab_index == INDIRECT_SYMBOL_ABS || symtab_index == INDIRECT_SYMBOL_LOCAL ||
symtab_index == (INDIRECT_SYMBOL_LOCAL | INDIRECT_SYMBOL_ABS)) {
continue;
}
uint32_t strtab_offset = symtab[symtab_index].n_un.n_strx;
char *symbol_name = strtab + strtab_offset;
bool symbol_name_longer_than_1 = symbol_name[0] && symbol_name[1];
struct doraemon_rebindings_entry *cur = rebindings;
while (cur) {
for (uint j = 0; j < cur->rebindings_nel; j++) {
if (symbol_name_longer_than_1 &&
strcmp(&symbol_name[1], cur->rebindings[j].name) == 0) {
if (cur->rebindings[j].replaced != NULL &&
indirect_symbol_bindings[i] != cur->rebindings[j].replacement) {
*(cur->rebindings[j].replaced) = indirect_symbol_bindings[i];
}
indirect_symbol_bindings[i] = cur->rebindings[j].replacement;
goto symbol_loop;
}
}
cur = cur->next;
}
symbol_loop:;
}
if (isDataConst) {
int protection = 0;
if (oldProtection & VM_PROT_READ) {
protection |= PROT_READ;
}
if (oldProtection & VM_PROT_WRITE) {
protection |= PROT_WRITE;
}
if (oldProtection & VM_PROT_EXECUTE) {
protection |= PROT_EXEC;
}
mprotect(indirect_symbol_bindings, section->size, protection);
}
}

static void doraemon_rebind_symbols_for_image(struct doraemon_rebindings_entry *rebindings,
const struct mach_header *header,
intptr_t slide) {
Dl_info info;
if (dladdr(header, &info) == 0) {
return;
}

segment_command_t *cur_seg_cmd;
segment_command_t *linkedit_segment = NULL;
struct symtab_command* symtab_cmd = NULL;
struct dysymtab_command* dysymtab_cmd = NULL;

uintptr_t cur = (uintptr_t)header + sizeof(mach_header_t);
for (uint i = 0; i < header->ncmds; i++, cur += cur_seg_cmd->cmdsize) {
cur_seg_cmd = (segment_command_t *)cur;
if (cur_seg_cmd->cmd == LC_SEGMENT_ARCH_DEPENDENT) {
if (strcmp(cur_seg_cmd->segname, SEG_LINKEDIT) == 0) {
linkedit_segment = cur_seg_cmd;
}
} else if (cur_seg_cmd->cmd == LC_SYMTAB) {
symtab_cmd = (struct symtab_command*)cur_seg_cmd;
} else if (cur_seg_cmd->cmd == LC_DYSYMTAB) {
dysymtab_cmd = (struct dysymtab_command*)cur_seg_cmd;
}
}

if (!symtab_cmd || !dysymtab_cmd || !linkedit_segment ||
!dysymtab_cmd->nindirectsyms) {
return;
}

// Find base symbol/string table addresses
uintptr_t linkedit_base = (uintptr_t)slide + linkedit_segment->vmaddr - linkedit_segment->fileoff;
nlist_t *symtab = (nlist_t *)(linkedit_base + symtab_cmd->symoff);
char *strtab = (char *)(linkedit_base + symtab_cmd->stroff);

// Get indirect symbol table (array of uint32_t indices into symbol table)
uint32_t *indirect_symtab = (uint32_t *)(linkedit_base + dysymtab_cmd->indirectsymoff);

cur = (uintptr_t)header + sizeof(mach_header_t);
for (uint i = 0; i < header->ncmds; i++, cur += cur_seg_cmd->cmdsize) {
cur_seg_cmd = (segment_command_t *)cur;
if (cur_seg_cmd->cmd == LC_SEGMENT_ARCH_DEPENDENT) {
if (strcmp(cur_seg_cmd->segname, SEG_DATA) != 0 &&
strcmp(cur_seg_cmd->segname, SEG_DATA_CONST) != 0) {
continue;
}
for (uint j = 0; j < cur_seg_cmd->nsects; j++) {
section_t *sect =
(section_t *)(cur + sizeof(segment_command_t)) + j;
if ((sect->flags & SECTION_TYPE) == S_LAZY_SYMBOL_POINTERS) {
doraemon_perform_rebinding_with_section(rebindings, sect, slide, symtab, strtab, indirect_symtab);
}
if ((sect->flags & SECTION_TYPE) == S_NON_LAZY_SYMBOL_POINTERS) {
doraemon_perform_rebinding_with_section(rebindings, sect, slide, symtab, strtab, indirect_symtab);
}
}
}
}
}

static void _doraemon_rebind_symbols_for_image(const struct mach_header *header,
intptr_t slide) {
doraemon_rebind_symbols_for_image(_rebindings_head, header, slide);
}

int doraemon_rebind_symbols_image(void *header,
intptr_t slide,
struct doraemon_rebinding rebindings[],
size_t rebindings_nel) {
struct doraemon_rebindings_entry *rebindings_head = NULL;
int retval = doraemon_prepend_rebindings(&rebindings_head, rebindings, rebindings_nel);
doraemon_rebind_symbols_for_image(rebindings_head, (const struct mach_header *) header, slide);
if (rebindings_head) {
free(rebindings_head->rebindings);
}
free(rebindings_head);
return retval;
}

int doraemon_rebind_symbols(struct doraemon_rebinding rebindings[], size_t rebindings_nel) {
int retval = doraemon_prepend_rebindings(&_rebindings_head, rebindings, rebindings_nel);
if (retval < 0) {
return retval;
}
// If this was the first call, register callback for image additions (which is also invoked for
// existing images, otherwise, just run on existing images
if (!_rebindings_head->next) {
_dyld_register_func_for_add_image(_doraemon_rebind_symbols_for_image);
} else {
uint32_t c = _dyld_image_count();
for (uint32_t i = 0; i < c; i++) {
_doraemon_rebind_symbols_for_image(_dyld_get_image_header(i), _dyld_get_image_vmaddr_slide(i));
}
}
return retval;
}
59 changes: 59 additions & 0 deletions iOS/DoraemonKit/Src/Core/Util/fishhook/doraemon_fishhook.h
Original file line number Diff line number Diff line change
@@ -0,0 +1,59 @@
//
// doraemon_fishhook.h
// DoraemonKit-DoraemonKit
//
// Created by didi on 2020/3/18.
//

#ifndef doraemon_fishhook_h
#define doraemon_fishhook_h

#include <stddef.h>
#include <stdint.h>

#if !defined(DORAEMON_FISHHOOK_EXPORT)
#define DORAEMON_FISHHOOK_VISIBILITY __attribute__((visibility("hidden")))
#else
#define DORAEMON_FISHHOOK_VISIBILITY __attribute__((visibility("default")))
#endif

#ifdef __cplusplus
extern "C" {
#endif //__cplusplus

/*
* A structure representing a particular intended rebinding from a symbol
* name to its replacement
*/
struct doraemon_rebinding {
const char *name;
void *replacement;
void **replaced;
};

/*
* For each rebinding in rebindings, rebinds references to external, indirect
* symbols with the specified name to instead point at replacement for each
* image in the calling process as well as for all future images that are loaded
* by the process. If rebind_functions is called more than once, the symbols to
* rebind are added to the existing list of rebindingdoraemon_rebind_symbolsl
* is rebound more than once, the later rebinding will take precedence.
*/
DORAEMON_FISHHOOK_VISIBILITY
int doraemon_rebind_symbols(struct doraemon_rebinding rebindings[], size_t rebindings_nel);

/*
* Rebinds as above, but only in the specified image. The header should point
* to the mach-o header, the slide should be the slide offset. Others as above.
*/
DORAEMON_FISHHOOK_VISIBILITY
int doraemon_rebind_symbols_image(void *header,
intptr_t slide,
struct doraemon_rebinding rebindings[],
size_t rebindings_nel);
#ifdef __cplusplus
}
#endif //__cplusplus


#endif /* doraemon_fishhook_h */
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