<br><br><div class="gmail_quote">On Fri, Jan 27, 2012 at 7:58 AM, Alexander Potapenko <span dir="ltr"><<a href="mailto:glider@google.com">glider@google.com</a>></span> wrote:<br><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex">
Kostya,<br>
<br>
it seems to me that this patch broke the support for ObjC.<br></blockquote><div>It is very unlikely that this patch broke the objc support in asan. </div><div>btw, can we have objc tests on linux? </div><div><br></div><div>
--kcc </div><div> </div><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex">
<br>
$ gobjdump -D bin_darwin/asan_test32<br>
...<br>
<br>
0013b460 <+[LoadSomething load]>:<br>
13b460: 55 push %ebp<br>
13b461: 89 e5 mov %esp,%ebp<br>
13b463: 53 push %ebx<br>
13b464: 57 push %edi<br>
13b465: 56 push %esi<br>
13b466: 83 ec 0c sub $0xc,%esp<br>
13b469: e8 00 00 00 00 call 13b46e <+[LoadSomething<br>
load]+0xe><br>
13b46e: 5b pop %ebx<br>
13b46f: 8d b3 72 75 1b 00 lea 0x1b7572(%ebx),%esi<br>
13b475: 89 34 24 mov %esi,(%esp)<br>
13b478: e8 4f 77 17 00 call 2b2bcc <_strlen$stub><br>
13b47d: 85 c0 test %eax,%eax<br>
13b47f: 74 22 je 13b4a3 <+[LoadSomething<br>
load]+0x43><br>
13b481: 31 ff xor %edi,%edi<br>
13b483: 8d 9b 72 75 1b 00 lea 0x1b7572(%ebx),%ebx<br>
13b489: 0f 1f 80 00 00 00 00 nopl 0x0(%eax)<br>
13b490: 8a 06 mov (%esi),%al<br>
13b492: 88 45 f3 mov %al,-0xd(%ebp)<br>
13b495: 89 1c 24 mov %ebx,(%esp)<br>
13b498: 46 inc %esi<br>
13b499: 47 inc %edi<br>
13b49a: e8 2d 77 17 00 call 2b2bcc <_strlen$stub><br>
13b49f: 39 c7 cmp %eax,%edi<br>
13b4a1: 72 ed jb 13b490 <+[LoadSomething<br>
load]+0x30><br>
13b4a3: 83 c4 0c add $0xc,%esp<br>
13b4a6: 5e pop %esi<br>
13b4a7: 5f pop %edi<br>
13b4a8: 5b pop %ebx<br>
13b4a9: 5d pop %ebp<br>
13b4aa: c3 ret<br>
13b4ab: 0f 1f 44 00 00 nopl 0x0(%eax,%eax,1)<br>
...<br>
<br>
-- as you can see, __asan_init is not called at the beginning of the function.<br>
This leads to crashes in Chromium, because some instrumented code ends<br>
up being called from such load methods before __asan_init.<br>
I'm going to take a look, but it'll be great if you know how to fix<br>
this off the top of your head.<br>
</blockquote></div><br>