进制重排

#import "DZHomeViewController.h"

#import <dlfcn.h> // 动态库的显式调用

#import <libkern/OSAtomic.h> //

/*

 考虑到插桩方法会调用很多次，使用锁会影响性能，所以使用苹果底层的`原子队列`，其内部实际上是一个链表，遵循先进先出

 **/

static OSQueueHead symbolList = OS_ATOMIC_QUEUE_INIT;

// 定义符号结构体

typedef struct {

    void *pc;

    void *next;

} PCNode;

@interface DZHomeViewController ()

@end

@implementation DZHomeViewController

void(^blockTest)(void) = ^(void) {

};

+ (void)load {

}

+ (void)initialize {

}

- (void)viewDidLoad {
    [super viewDidLoad];    
}

- (void)touchesBegan:(NSSet<UITouch *> *)touches withEvent:(UIEvent *)event {
  //    [self deziTest];
    NSMutableArray <NSString *> * symbolNames = [NSMutableArray array];

    while (YES) {

        PCNode *node = OSAtomicDequeue(&symbolList, offsetof(PCNode, next));

        if (node == NULL) {

            break;

        }

        Dl_info info;

        dladdr(node->pc, &info);

        NSString * name = @(info.dli_sname);

        BOOL  isObjc = [name hasPrefix:@"+["] || [name hasPrefix:@"-["];

        NSString * symbolName = isObjc ? name: [@"_" stringByAppendingString:name];

        [symbolNames addObject:symbolName];

    }

    // 取反

    NSEnumerator *emt = [symbolNames reverseObjectEnumerator];

    //去重

    NSMutableArray<NSString *> *funcs = [NSMutableArray arrayWithCapacity:symbolNames.count];

    NSString *name;

    while (name = [emt nextObject]) {

        if (![funcs containsObject:name]) {

            [funcs addObject:name];

        }

    }

    //干掉自己!

    [funcs removeObject:[NSString stringWithFormat:@"%s",__FUNCTION__]];

    //将数组变成字符串

    NSString *funcStr = [funcs  componentsJoinedByString:@"\n"];

    NSString *filePath = [NSTemporaryDirectory() stringByAppendingPathComponent:@"fontResources.order"];

    NSData *fileContents = [funcStr dataUsingEncoding:NSUTF8StringEncoding];

    [[NSFileManager defaultManager] createFileAtPath:filePath contents:fileContents attributes:nil];

    NSLog(@"%@",funcStr);

}

- (void)deziTest {
    blockTest();
}

void __sanitizer_cov_trace_pc_guard_init(uint32_t *start, uint32_t *stop) {

  static uint64_t N;  // Counter for the guards.

  if (start == stop || *start) return;  // Initialize only once.

  printf("INIT: %p %p\n", start, stop);

  for (uint32_t *x = start; x < stop; x++)

    *x = ++N;  // Guards should start from 1.

}

void __sanitizer_cov_trace_pc_guard(uint32_t *guard) {

    /*  精确定位 哪里开始 到哪里结束!  在这里面做判断写条件!*/

    void *PC = __builtin_return_address(0);

    DeziNode *node = malloc(sizeof(DeziNode));

    *node = (DeziNode){PC,NULL};

    //进入

    OSAtomicEnqueue(&symbolList, node, offsetof(DeziNode, next));

    Dl_info info; // 动态链接库时 通过传递指针给Mach-O头部Mach-O header，引用一个Dl_info结构体

    dladdr(PC, &info);

    printf("----------------------------------------\nfname:%s \nfbase:%p \nsname:%s \nsaddr:%p\n",

           info.dli_fname,

           info.dli_fbase,

           info.dli_sname,

           info.dli_saddr);

}

@end

typedef struct dl_info {

    const char      *dli_fname;     /* 共享对象的路径名 */

    void            *dli_fbase;     /* 共享对象的基本地址 */

    const char      *dli_sname;     /* 最近的符号的名称 */

    void            *dli_saddr;     /* 最近的符号地址 */

} Dl_info;

void __sanitizer_cov_trace_pc_guard(uint32_t *guard) {

    /* 定位插桩方法的下一个方法，也就是程序中的真实调用方法 */

    void *PC = __builtin_return_address(0);

    PCNode *node = malloc(sizeof(PCNode));

    *node = (PCNode){PC,NULL};

    // 进入 &symbolList链表表头，node节点数据，offsetof(PCNode, next) 下一个成员在链表中的偏移地址

    OSAtomicEnqueue(&symbolList, node, offsetof(PCNode, next));

}

- (void)touchesBegan:(NSSet<UITouch *> *)touches withEvent:(UIEvent *)event {
    NSMutableArray <NSString *> *symbolNames = [NSMutableArray array];

    while (YES) {

        // &symbolList链表表头，

        PCNode *node = OSAtomicDequeue(&symbolList, offsetof(PCNode, next));

        if (node == NULL) {

            break;

        }

        Dl_info info;

        dladdr(node->pc, &info);

        NSString * name = @(info.dli_sname);

        BOOL isObjc = [name hasPrefix:@"+["] || [name hasPrefix:@"-["];

        NSString *symbolName = isObjc ? name: [@"_" stringByAppendingString:name];

        [symbolNames addObject:symbolName];

    }

    // 由于先进先出的特性，所以要取反

    NSEnumerator *emt = [symbolNames reverseObjectEnumerator];

    // 去重

    NSMutableArray<NSString *> *funcs = [NSMutableArray arrayWithCapacity:symbolNames.count];

    NSString *name;

    while (name = [emt nextObject]) {

        if (![funcs containsObject:name]) {

            [funcs addObject:name];

        }

    }

    // 去掉自己

    [funcs removeObject:[NSString stringWithFormat:@"%s",__FUNCTION__]];

    // 将数组变成字符串

    NSString *funcStr = [funcs  componentsJoinedByString:@"\n"];

    NSString *filePath = [NSTemporaryDirectory() stringByAppendingPathComponent:@"fontResources.order"];

    NSData *fileContents = [funcStr dataUsingEncoding:NSUTF8StringEncoding];

    [[NSFileManager defaultManager] createFileAtPath:filePath contents:fileContents attributes:nil];

    NSLog(@"%@",funcStr);

}