dsc_extractor工具安装及使用 （dyld_share
此贴步骤通过狗神原贴整理，问题为自己总结
1、leo-MacBook-Pro:~ leo$ cd ~
2、leo-MacBook-Pro:~ leo$ mkdir dsc_extractor
3、leo-MacBook-Pro:~ leo$ cd dsc_extractor
4、leo-MacBook-Pro:~ leo$ wget http://opensource.apple.com/tarballs/dyld/dyld-210.2.3.tar.gz （提示无wget 个通过brew安装 brew install wget）
5、leo-MacBook-Pro:dsc_extractor leo$ tar xvf dyld-210.2.3.tar.gz
6、leo-MacBook-Pro:~ leo$ cd dyld-210.2.3/launch-cache/
7、leo-MacBook-Pro:launch-cache leo$ touch dsc_extractor.patch (ls 看下多出一个 dsc_extractor.patch 文件)
8、拷贝如下内容到dsc_extractor.patch文件中
https://gist.githubusercontent.com/lightbulbone/6092321/raw/305c9cc67a2379cdf852903de2d4b102c8e7bf4a/dsc_extractor.patch
9、leo-MacBook-Pro:launch-cache leo$ patch < dsc_extractor.patch (如遇问题可参考问题一)
10、leo-MacBook-Pro:launch-cache leo$ clang++ -o dsc_extractor dsc_extractor.cpp dsc_iterator.cpp （如遇问题可参考问题二）
xtractor.cpp dsc_iterator.cpp
In file included from dsc_extractor.cpp:51:
/Applications/Xcode.app/Contents/Developer/Toolchains/XcodeDefault.xctoolchain/usr/include/c++/v1/ext/hash_map:213:5: warning:
Use of the header <ext/hash_map> is deprecated. Migrate to
<unordered_map> [-W#warnings]
# warning Use of the header <ext/hash_map> is deprecat...
^
1 warning generated.
安装成功
11、使用
leo-MacBook-Pro:launch-cache leo$ ./dsc_extractor /Users/leo/Desktop/iosRETest/dyld_shared_cache_arm64 /Users/leo/Desktop/iosRETest/dyldarm64
launch-cache目录下，./dsc_extractor dyld_shared_cache存放目录 /xxx/xx/x/解出的文件存放目录
问题一：
leo-MacBook-Pro:launch-cache leo$ patch < dsc_extractor.patch
patching file dsc_extractor.cpp
patch unexpectedly ends in middle of line
patch: **** unexpected end of file in patch
原处：
-#if 0
+/* #if 0 */
修改成
-#if 1
+/* #if 1 */
在+/* #endif */ 后 按下回车，添加一行
再次运行
patch < dsc_extractor.patch
问题二：
leo-MacBook-Pro:launch-cache leo$ clang++ -o dsc_extractor dsc_extractor.cpp dsc_iterator.cpp
In file included from dsc_extractor.cpp:51:
/Applications/Xcode.app/Contents/Developer/Toolchains/XcodeDefault.xctoolchain/usr/include/c++/v1/ext/hash_map:213:5: warning:
Use of the header <ext/hash_map> is deprecated. Migrate to
<unordered_map> [-W#warnings]
# warning Use of the header <ext/hash_map> is deprecat...
^
dsc_extractor.cpp:232:20: error: assigning to 'char *' from
incompatible type 'const char *'
...while ( (slash = strchr(afterSlash, '/')) != NULL ) {
^~~~~~~~~~~~~~~~~~~~~~~
dsc_extractor.cpp:460:2: error: unterminated conditional
directive
#if 0
^
1 warning and 2 errors generated.
原处：230行
const char* afterSlash = &dirs[1];
修改成：
char* afterSlash = &dirs[1]; 去除const
原处：460行
#if 0
修改成：
#if 1
原处：488行
/* #endif */
修改成：
#endif 放开注释
再次运行
clang++ -o dsc_extractor dsc_extractor.cpp dsc_iterator.cpp
