├── README.md
├── LICENSE
├── ZLJPrinter.h
├── .gitignore
└── ZLJPrinter.m


/README.md:
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1 | # ZLJBlockPrinter
2 | Print MethodSignature And VMAddr of Blocks!
3 | Article:http://iosre.com/t/zljblockprinter-block/15231
4 | 


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/LICENSE:
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 1 | MIT License
 2 | 
 3 | Copyright (c) 2019 zljkevin
 4 | 
 5 | Permission is hereby granted, free of charge, to any person obtaining a copy
 6 | of this software and associated documentation files (the "Software"), to deal
 7 | in the Software without restriction, including without limitation the rights
 8 | to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
 9 | copies of the Software, and to permit persons to whom the Software is
10 | furnished to do so, subject to the following conditions:
11 | 
12 | The above copyright notice and this permission notice shall be included in all
13 | copies or substantial portions of the Software.
14 | 
15 | THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
16 | IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
17 | FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
18 | AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
19 | LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
20 | OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
21 | SOFTWARE.
22 | 


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/ZLJPrinter.h:
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 1 | //
 2 | //  ZLJPrinter.h
 3 | //  SMS
 4 | //
 5 | //  Created by Mu on 2019/8/1.
 6 | //
 7 | 
 8 | #import <Foundation/Foundation.h>
 9 | #import <mach-o/dyld.h>
10 | #import <mach/mach.h>
11 | 
12 | NS_ASSUME_NONNULL_BEGIN
13 | 
14 | @interface ZLJPrinter : NSObject
15 | 
16 | + (NSString *)printBlock:(id)aBlock;
17 | + (NSString *)callStackSymbolsLocateInImages:(NSArray <NSString *>*)images;
18 | 
19 | @end
20 | 
21 | NS_ASSUME_NONNULL_END
22 | 
23 | 
24 | /* block 内存结构
25 |  struct Block_literal_1 {
26 |  void *isa; //16byte initialized to &_NSConcreteStackBlock or &_NSConcreteGlobalBlock
27 |  int flags; //8byte
28 |  int reserved; //8byte
29 |  void (*invoke)(void *, ...); //16byte
30 |  struct Block_descriptor_1 { //16byte
31 |  unsigned long int reserved;         //16byte NULL
32 |  unsigned long int size;         //16byte sizeof(struct Block_literal_1)
33 |  // optional helper functions
34 |  void (*copy_helper)(void *dst, void *src);     //16byte IFF (1<<25)
35 |  void (*dispose_helper)(void *src);             //16byte IFF (1<<25)
36 |  // required ABI.2010.3.16
37 |  const char *signature;                         //16byte IFF (1<<30)
38 |  } *descriptor;
39 |  // imported variables
40 |  };
41 |  
42 |  struct BlockLiteral {
43 |  void *isa;
44 |  int flags;
45 |  int reserved;
46 |  void (*invoke)(void *, ...);
47 |  struct BlockDescriptor *descriptor;
48 |  };
49 |  
50 |  struct BlockDescriptor {
51 |  unsigned long int reserved;
52 |  unsigned long int size;
53 |  void (*copy_helper)(void *dst, void *src);
54 |  void (*dispose_helper)(void *src);
55 |  const char *signature;
56 |  };
57 |  
58 |  */
59 | 


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/.gitignore:
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 1 | # Xcode
 2 | #
 3 | # gitignore contributors: remember to update Global/Xcode.gitignore, Objective-C.gitignore & Swift.gitignore
 4 | 
 5 | ## Build generated
 6 | build/
 7 | DerivedData/
 8 | 
 9 | ## Various settings
10 | *.pbxuser
11 | !default.pbxuser
12 | *.mode1v3
13 | !default.mode1v3
14 | *.mode2v3
15 | !default.mode2v3
16 | *.perspectivev3
17 | !default.perspectivev3
18 | xcuserdata/
19 | 
20 | ## Other
21 | *.moved-aside
22 | *.xccheckout
23 | *.xcscmblueprint
24 | 
25 | ## Obj-C/Swift specific
26 | *.hmap
27 | *.ipa
28 | *.dSYM.zip
29 | *.dSYM
30 | 
31 | # CocoaPods
32 | #
33 | # We recommend against adding the Pods directory to your .gitignore. However
34 | # you should judge for yourself, the pros and cons are mentioned at:
35 | # https://guides.cocoapods.org/using/using-cocoapods.html#should-i-check-the-pods-directory-into-source-control
36 | #
37 | # Pods/
38 | 
39 | # Carthage
40 | #
41 | # Add this line if you want to avoid checking in source code from Carthage dependencies.
42 | # Carthage/Checkouts
43 | 
44 | Carthage/Build
45 | 
46 | # fastlane
47 | #
48 | # It is recommended to not store the screenshots in the git repo. Instead, use fastlane to re-generate the
49 | # screenshots whenever they are needed.
50 | # For more information about the recommended setup visit:
51 | # https://docs.fastlane.tools/best-practices/source-control/#source-control
52 | 
53 | fastlane/report.xml
54 | fastlane/Preview.html
55 | fastlane/screenshots/**/*.png
56 | fastlane/test_output
57 | 
58 | # Code Injection
59 | #
60 | # After new code Injection tools there's a generated folder /iOSInjectionProject
61 | # https://github.com/johnno1962/injectionforxcode
62 | 
63 | iOSInjectionProject/
64 | 


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/ZLJPrinter.m:
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  1 | //
  2 | //  ZLJPrinter.m
  3 | //  SMS
  4 | //
  5 | //  Created by Mu on 2019/8/1.
  6 | //
  7 | 
  8 | #import "ZLJPrinter.h"
  9 | 
 10 | @implementation ZLJPrinter
 11 | 
 12 | + (NSString *)callStackSymbolsLocateInImages:(NSArray <NSString *>*)images{
 13 |     
 14 |     NSArray <NSString *>*preSetImages = [@[
 15 |                                            @"libdyld.dylib",
 16 |                                            @"UIKit",
 17 |                                            @"GraphicsServices",
 18 |                                            @"CoreFoundation",
 19 |                                            @"Foundation",
 20 |                                            @"CoreTelephony",
 21 |                                            ] mutableCopy];
 22 |     
 23 |     NSMutableDictionary <NSString *, NSNumber *>*baseAddrDic = [[NSMutableDictionary alloc]init];
 24 |     
 25 |     for(int i = 0; i < _dyld_image_count(); i++)
 26 |     {
 27 |         intptr_t  base_addr = _dyld_get_image_vmaddr_slide(i);
 28 |         const char *name = _dyld_get_image_name(i);
 29 |         NSString *nameStr = [NSString stringWithUTF8String:name];
 30 |         
 31 |         if ([images containsObject:[nameStr lastPathComponent]] ||
 32 |             [preSetImages containsObject:[nameStr lastPathComponent]]) {
 33 |             [baseAddrDic setObject:@(base_addr) forKey:[nameStr lastPathComponent]];
 34 |         }
 35 |     }
 36 |     
 37 |     NSArray <NSString *>*syms = [NSThread  callStackSymbols];
 38 |     
 39 |     NSMutableString *retStr = [[NSMutableString alloc]init];
 40 |     [retStr appendString:@"\n\n/***ZLJ CallStackSymbols Start***/\n"];
 41 |     for (NSString *sym in syms) {
 42 |         
 43 |         NSMutableArray <NSString *>*symUnits = [[sym componentsSeparatedByString:@" "] mutableCopy];
 44 |         while ([symUnits containsObject:@""]) {
 45 |             [symUnits removeObject:@""];
 46 |         }
 47 |         
 48 |         if (symUnits.count >= 3 && [symUnits[2] hasPrefix:@"0x"]) {
 49 |             
 50 |             char *symVMAddrStr = (char *)symUnits[2].UTF8String;
 51 |             char *endPtr;
 52 |             NSInteger symVMAddr = strtol(symVMAddrStr, &endPtr, 16);
 53 |             
 54 |             if ([baseAddrDic.allKeys containsObject:symUnits[1]]) {
 55 |                 NSInteger symFileAddr = symVMAddr - [baseAddrDic objectForKey:symUnits[1]].integerValue;
 56 |                 if (symFileAddr <= 0) {
 57 |                     [retStr appendFormat:@"%@ = 0x%lx ≈ symFileAddr\n", sym, symUnits.lastObject.integerValue];
 58 |                 }else{
 59 |                     [retStr appendFormat:@"%@  symFileAddr 0x%lx\n", sym, symFileAddr];
 60 |                 }
 61 |             }else{
 62 |                 [retStr appendFormat:@"%@\n", sym];
 63 |             }
 64 |             
 65 |         }else{
 66 |             [retStr appendFormat:@"%@\n", sym];
 67 |         }
 68 |     }
 69 |     [retStr appendString:@"/***ZLJ CallStackSymbols End***/\n\n"];
 70 |     
 71 |     NSLog(@"%@",retStr);
 72 |     
 73 |     return retStr;
 74 | }
 75 | 
 76 | 
 77 | + (NSString *)printBlock:(id)aBlock{
 78 |     
 79 |     if (!([aBlock isKindOfClass:NSClassFromString(@"__NSGlobalBlock__")] ||
 80 |           [aBlock isKindOfClass:NSClassFromString(@"__NSMallocBlock__")] ||
 81 |           [aBlock isKindOfClass:NSClassFromString(@"__NSStackBlock__")]    )) {
 82 |         return @"ZLJBlockPrinter Error: Not A Block!";
 83 |     }
 84 |     
 85 |     uint64_t blockInMemory[4];      //block 在内存中的前4个uint64_t
 86 |     uint64_t descriptor[5];         //block的descriptor 在内存中的前5个uint64_t
 87 |     char *signatureCStr;
 88 |     NSMethodSignature *blockSignature;
 89 |     
 90 |     void *aBlockPtr = (__bridge void *)(aBlock);
 91 |     memcpy(blockInMemory, (void *)aBlockPtr, sizeof(blockInMemory));
 92 |     memcpy(descriptor, (void *)blockInMemory[3], sizeof(descriptor));
 93 |     
 94 |     BOOL hasSignature = ((blockInMemory[1] & 0x00000000FFFFFFFF)  & (1 << 30)) != 0;
 95 |     if (!hasSignature) {
 96 |         return @"ZLJBlockPrinter: Block Do Not Have Signature!";
 97 |     }
 98 |     
 99 |     BOOL hasCopyDisposeHelper = ((blockInMemory[1] & 0x00000000FFFFFFFF)  & (1 << 25)) != 0;
100 |     
101 |     if (hasCopyDisposeHelper) {
102 |         signatureCStr = (char *)descriptor[4];
103 |     }else{
104 |         signatureCStr = (char *)descriptor[2];
105 |     }
106 |     blockSignature = [NSMethodSignature signatureWithObjCTypes:signatureCStr];
107 |     
108 |     NSString *retStr = [NSString stringWithFormat:@"\n%@\nBlockVmaddrSlide:0x%llx\nBlockSignature:%@",
109 |                         aBlock,
110 |                         blockInMemory[2],
111 |                         blockSignature.debugDescription];
112 |     NSLog(@"%@",retStr);
113 |     
114 |     return retStr;
115 | }
116 | 
117 | //+ (NSString *)printBlock:(id)aBlock inImage:(nullable NSString *)imageName{
118 | //
119 | //    if (!([aBlock isKindOfClass:NSClassFromString(@"__NSGlobalBlock__")] ||
120 | //          [aBlock isKindOfClass:NSClassFromString(@"__NSMallocBlock__")] ||
121 | //          [aBlock isKindOfClass:NSClassFromString(@"__NSStackBlock__")]    )) {
122 | //        return @"ZLJBlockPrinter Error: Not A Block!";
123 | //    }
124 | //
125 | //    uint64_t blockInMemory[4];      //block 在内存中的前4个uint64_t
126 | //    uint64_t descriptor[5];         //block的descriptor 在内存中的前5个uint64_t
127 | //    char *signatureCStr;
128 | //    NSMethodSignature *blockSignature;
129 | //
130 | //    void *aBlockPtr = (__bridge void *)(aBlock);
131 | //    memcpy(blockInMemory, (void *)aBlockPtr, sizeof(blockInMemory));
132 | //    memcpy(descriptor, (void *)blockInMemory[3], sizeof(descriptor));
133 | //
134 | //    BOOL hasSignature = ((blockInMemory[1] & 0x00000000FFFFFFFF)  & (1 << 30)) != 0;
135 | //    if (!hasSignature) {
136 | //        return @"ZLJBlockPrinter: Block Do Not Have Signature!";
137 | //    }
138 | //
139 | //
140 | //    BOOL hasCopyDisposeHelper = ((blockInMemory[1] & 0x00000000FFFFFFFF)  & (1 << 25)) != 0;
141 | //
142 | //    if (hasCopyDisposeHelper) {
143 | //        signatureCStr = (char *)descriptor[4];
144 | //    }else{
145 | //        signatureCStr = (char *)descriptor[2];
146 | //    }
147 | //    blockSignature = [NSMethodSignature signatureWithObjCTypes:signatureCStr];
148 | //
149 | //
150 | //    uint64_t block_file_slide = 0;
151 | //    if (imageName.length && [aBlock isKindOfClass:NSClassFromString(@"__NSGlobalBlock__")]) {
152 | //        NSInteger image_vmaddr_slide = 0;
153 | //        for(int i = 0; i < _dyld_image_count(); i++)
154 | //        {
155 | //            const char *name = _dyld_get_image_name(i);
156 | //            NSString *nameStr = [NSString stringWithUTF8String:name];
157 | //            if ([nameStr containsString:imageName]) {
158 | //                image_vmaddr_slide = _dyld_get_image_vmaddr_slide(i);
159 | //                break;
160 | //            }
161 | //        }
162 | //        block_file_slide = blockInMemory[2] - image_vmaddr_slide;
163 | //    }
164 | //
165 | //    NSString *ret = nil;
166 | //    if (imageName.length && [aBlock isKindOfClass:NSClassFromString(@"__NSGlobalBlock__")]) {
167 | //        ret = [NSString stringWithFormat:@"\n%@\nBlockVmaddrSlide(Check This Address In LLDB):0x%llx\nBlockFileSlide(Jump To This Address In IDA):0x%llx\nBlockSignature:%@", [aBlock class], blockInMemory[2], block_file_slide, blockSignature.debugDescription];
168 | //    }else{
169 | //        ret = [NSString stringWithFormat:@"\n%@\nBlockVmaddrSlide(Check This Address In LLDB):0x%llx\nBlockSignature:%@", aBlock, blockInMemory[2], blockSignature.debugDescription];
170 | //    }
171 | //
172 | //    return ret;
173 | //}
174 | 
175 | 
176 | @end
177 | 


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