我正在尝试在OSX 10.9上的this gist构建示例:
cd /tmp
git clone https://gist.github.com/ecfd80885b9ddf6734192c056cf48bf4.git fopentest
cd fopentest
bash buildrun.sh
构建成功 - 此外,我可以在终端输出中看到以下内容:
...
+ DYLD_BIND_AT_LAUNCH=YES
+ ./fopentest.exe ./mytestfile.txt
This is a wrapper function for fopen.
=== this is mytestfile.txt ===
Second line here...
Third line here...
这意味着调用DYLD_BIND_AT_LAUNCH=YES ./fopentest.exe ./mytestfile.txt
成功找到了包装器库和函数。
现在,作为一项测试,我想通过dtruss
,OSX “strace” equivalent运行此可执行文件 - 我也在该链接中推荐了sudo chmod u+s /usr/sbin/dtrace
。所以我试试/tmp
文件夹:
$ DYLD_BIND_AT_LAUNCH=YES dtruss ./fopentest.exe ./mytestfile.txt 2>&1 | grep wrap
This is a wrapper function for fopen.
stat64("libwrapper.dylib\0", 0x7FFF5A7DF248, 0x7FFF5A7E00E0) = 0 0
open("libwrapper.dylib\0", 0x0, 0x0) = 3 0
write_nocancel(0x1, "This is a wrapper function for fopen.\n=== this is mytestfile.txt ===\nSecond line here...\nThird line here...\n\0", 0x6C) = 108 0
所以,显然dtruss
可行。但是,我在不同的目录中有完全相同的文件,为什么我尝试运行相同的命令,dtruss
失败:
$ DYLD_BIND_AT_LAUNCH=YES dtruss ./fopentest.exe ./mytestfile.txt 2>&1 | grep wrap
dyld: Library not loaded: libwrapper.dylib
stat64("libwrapper.dylib\0", 0x7FFF4FD85228, 0x7FFF4FD860C0) = 0 0
open("libwrapper.dylib\0", 0x0, 0x0) = -1 Err#2
stat64("/Users/MYNAME/lib/libwrapper.dylib\0", 0x7FFF4FD85A08, 0x7FFF4FD860C0) = -1 Err#2
stat64("/usr/local/lib/libwrapper.dylib\0", 0x7FFF4FD85A08, 0x7FFF4FD860C0) = -1 Err#2
stat64("/usr/lib/libwrapper.dylib\0", 0x7FFF4FD85A18, 0x7FFF4FD860C0) = -1 Err#2
这可能是什么原因?
答案 0 :(得分:0)
嗯,我想我明白原因是什么:dtruss
无法找到库的目录实际上是通过sshfs
挂载的; mount
为此路径显示了这一点:
MYOTHERNAME@myRemotePC:/media/Test1 on /media/Test1 (osxfusefs, nodev, nosuid, synchronous, mounted by MYNAME)
所以,如果我尝试在DYLD_BIND_AT_LAUNCH=YES dtruss ./fopentest.exe ./mytestfile.txt
中拨打/media/Test1/fopentest/
,那么我会得到" dyld: Library not loaded: libwrapper.dylib
"。
但是,如果我将该文件夹移动到"适当的"文件系统,比如$HOME
:mv /media/Test1/fopentest ~/
,我甚至不需要重建,我只需拨打DYLD_BIND_AT_LAUNCH=YES dtruss ./fopentest.exe ./mytestfile.txt
中的~/fopentest/
,呼叫就会成功...
不确定为什么会发生这种情况 - 所以一定会更感谢你提供更丰富的答案......