问题描述
在使用valgrind运行iOS 4.2应用程序时出现问题。
我从Macports安装了valgrind 3.6.0-SVN。 XCode 3.2.5。
当我修改我的main（）运行valgrind我得到以下输出：
检测到在iPhone上不存在的系统库中调用符号的尝试：
open $ UNIX2003从函数_vgrZU_libSystemZdZaZddylib_arc4random调用映像vgpreload_core-x86-darwin.so 。
如果您在gdb中运行模拟器二进制文件时遇到此问题，请确保首先将start-with-shell设置为off。
== 99640 ==
== 99640 ==使用信号6（SIGABRT）的默认动作进程终止
== 99640 ==在0x8B5DEF6：__kill（in / usr /lib/libSystem.B.dylib）
== 99640 == by 0x8BF062C：raise（in /usr/lib/libSystem.B.dylib）
== 99640 == by 0x8C066E3：abort（in /usr/lib/libSystem.B.dylib）
== 99640 == by 0x33F2547：__springboard_unimplemented（在/Developer/Platforms/iPhoneSimulator.platform/Developer/SDKs/iPhoneSimulator4.2.sdk/usr/lib/libSystem中.dylib）
== 99640 == by 0x33FC208：open $ UNIX2003（在/Developer/Platforms/iPhoneSimulator.platform/Developer/SDKs/iPhoneSimulator4.2.sdk/usr/lib/libSystem.dylib中）
== 99640 == by 0x1AAD6F3：arc4random（vg_preloaded.c：163）
== 99640 == by 0x8AFFB7E：create_scalable_zone（in /usr/lib/libSystem.B.dylib）
== 99640 == by 0x8AFF7EA：_malloc_initialize（in /usr/lib/libSystem.B.dylib）
== 99640 == by 0x8B23449：malloc_create_zone（in /usr/lib/libSystem.B.dylib）
= = 99640 == 0x8B233F8：_dispatch_c cache_init（在/usr/lib/libSystem.B.dylib中）
== 99640 == by 0x8B21E0D：dispatch_once_f（in /usr/lib/libSystem.B.dylib）
== 99640 ==由0x8B233D3：_dispatch_continuation_alloc_from_heap（在/usr/lib/libSystem.B.dylib中）
错误似乎很清楚。如何解决这个问题？我听说过在SDK 3.x上运行valgrind的成功尝试。有什么变化？
任何其他建议？
一个可怕的黑客，我不知道这是什么意思...但它确实解决了这个问题：
在你的valgrind源代码中，打开vg_preloaded.c并找到第163行（在您的堆栈跟踪中引用）。更改那里的代码：
/ * if（rnd< 0）rnd = open（/ dev / ，O_RDONLY）;
read（rnd，& result，sizeof（result））; * /
result = random（）;
这似乎是使valgrind不工作的唯一的事情...你的里程可能会有所不同。 / p>
Having problems running iOS 4.2 apps with valgrind.
I installed valgrind 3.6.0-SVN from Macports. XCode 3.2.5.
When I modify my main() to run valgrind I get the following output:
Detected an attempt to call a symbol in system libraries that is not present on the iPhone: open$UNIX2003 called from function _vgrZU_libSystemZdZaZddylib_arc4random in image vgpreload_core-x86-darwin.so. If you are encountering this problem running a simulator binary within gdb, make sure you 'set start-with-shell off' first. ==99640== ==99640== Process terminating with default action of signal 6 (SIGABRT) ==99640== at 0x8B5DEF6: __kill (in /usr/lib/libSystem.B.dylib) ==99640== by 0x8BF062C: raise (in /usr/lib/libSystem.B.dylib) ==99640== by 0x8C066E3: abort (in /usr/lib/libSystem.B.dylib) ==99640== by 0x33F2547: __springboard_unimplemented (in /Developer/Platforms/iPhoneSimulator.platform/Developer/SDKs/iPhoneSimulator4.2.sdk/usr/lib/libSystem.dylib) ==99640== by 0x33FC208: open$UNIX2003 (in /Developer/Platforms/iPhoneSimulator.platform/Developer/SDKs/iPhoneSimulator4.2.sdk/usr/lib/libSystem.dylib) ==99640== by 0x1AAD6F3: arc4random (vg_preloaded.c:163) ==99640== by 0x8AFFB7E: create_scalable_zone (in /usr/lib/libSystem.B.dylib) ==99640== by 0x8AFF7EA: _malloc_initialize (in /usr/lib/libSystem.B.dylib) ==99640== by 0x8B23449: malloc_create_zone (in /usr/lib/libSystem.B.dylib) ==99640== by 0x8B233F8: _dispatch_ccache_init (in /usr/lib/libSystem.B.dylib) ==99640== by 0x8B21E0D: dispatch_once_f (in /usr/lib/libSystem.B.dylib) ==99640== by 0x8B233D3: _dispatch_continuation_alloc_from_heap (in /usr/lib/libSystem.B.dylib)
The error seems to be pretty clear. How can I fix this? I've heard of successful attempts running valgrind on SDK 3.x. What has changed?
Any other advice?
This is a hideous hack, and I have no idea what the implications are... but it did solve the problem:
In your valgrind source, open up vg_preloaded.c and find line 163 (referenced in your stack trace there). Change the code that is there to:
/* if (rnd < 0) rnd = open("/dev/random", O_RDONLY);
read(rnd, &result, sizeof(result)); */
result = random();
This appears to be the only thing that keeps valgrind from working... Your mileage may vary.
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