<html>
<head>
<base href="https://bugs.llvm.org/">
</head>
<body><table border="1" cellspacing="0" cellpadding="8">
<tr>
<th>Bug ID</th>
<td><a class="bz_bug_link
bz_status_NEW "
title="NEW - linux command will be deadlock when linked with libasan"
href="https://bugs.llvm.org/show_bug.cgi?id=49879">49879</a>
</td>
</tr>
<tr>
<th>Summary</th>
<td>linux command will be deadlock when linked with libasan
</td>
</tr>
<tr>
<th>Product</th>
<td>compiler-rt
</td>
</tr>
<tr>
<th>Version</th>
<td>10.0
</td>
</tr>
<tr>
<th>Hardware</th>
<td>PC
</td>
</tr>
<tr>
<th>OS</th>
<td>Linux
</td>
</tr>
<tr>
<th>Status</th>
<td>NEW
</td>
</tr>
<tr>
<th>Severity</th>
<td>enhancement
</td>
</tr>
<tr>
<th>Priority</th>
<td>P
</td>
</tr>
<tr>
<th>Component</th>
<td>asan
</td>
</tr>
<tr>
<th>Assignee</th>
<td>unassignedbugs@nondot.org
</td>
</tr>
<tr>
<th>Reporter</th>
<td>hndxvon@163.com
</td>
</tr>
<tr>
<th>CC</th>
<td>llvm-bugs@lists.llvm.org
</td>
</tr></table>
<p>
<div>
<pre>Hello,
centos seems to be incompatible with libasan(8.0.1).
Run a linux command(like ps,free) with LD_PRELOAD envrionable variable on
centos aarch64 kunpeng920 (gcc-9.2/glibc-2.30),
It will locked.
Run my scripts:
export ASAN_OPTIONS=detect_leaks=0:halt_on_error=0
export LD_LIBRARY_PATH=/usr/lib64/clang/8.0.1/lib/
export LD_PRELOAD=/lib64/clang/8.0.1/lib/libclang_rt.asan-aarch64.so
ps
------------------------------------------------------------------------
(gdb) bt
#0 0x0000ffffb244ecd8 in pthread_rwlock_wrlock () from /lib64/libpthread.so.0
#1 0x0000ffffb279501c in textdomain () from /lib64/libc.so.6
#2 0x0000ffffb29f72a0 in __interceptor_textdomain (domainname=0x40cab8
"procps-ng") at
../lib/asan/../sanitizer_common/sanitizer_common_interceptors.inc:413
#3 0x0000000000402b10 in main ()
(gdb) info threads
Id Target Id Frame
* 1 Thread 0xffffb2126480 (LWP 25205) "ps" 0x0000ffffb279501c in textdomain
() from /lib64/libc.so.6
There is only one thread. how could it generate deadlock?
But unset LD_PRELOAD, ps runs ok.
Try update compiler-rt to 10.0.0, this deadlock still exists.
Then I encountered a detailed stack of deadlock, such as:
The ASAN runtime calls dlerror (which uses gettext) during init, which causes a
deadlock.
#0 __dcigettext (domainname=0xfffff73fb1e8 <_libc_intl_domainname> "libc",
msgid1=0xfffff3b01ea0 "undefined symbol: swift_demangle",
msgid2=msgid2@entry=0x0, plural=plural@entry=0, n=n@entry=0,
category=category@entry=5) at dcigettext.c:485
#1 0x0000fffff72f6068 in __GI___dcgettext (domainname=<optimized out>,
msgid=<optimized out>, category=category@entry=5) at dcgettext.c:47
#2 0x0000fffff7450b48 in __dlerror () at dlerror.c:102
#3 0x0000fffff7588ccc in AsanInitInternal ()
at ../projects/compiler-rt/lib/asan/asan_rtl.cpp:521
#4 0x0000fffff7580698 in __interceptor_malloc ()
at ../projects/compiler-rt/lib/asan/asan_malloc_linux.cpp:144
#5 0x0000fffff72f5d58 in set_binding_values (
domainname=0xfffff6c21290 "libgpg-error", dirnamep=0xffffffffefb8,
codesetp=0x0) at bindtextdom.c:202
#6 0x0000fffff72f5fcc in set_binding_values (codesetp=0x0,
dirnamep=0xffffffffefb8, domainname=<optimized out>) at bindtextdom.c:82
#7 __bindtextdomain (domainname=<optimized out>, dirname=<optimized out>)
at bindtextdom.c:320
#8 0x0000fffff6c0c860 in gpg_err_init () from /usr/lib64/libgpg-error.so.0
#9 0x0000fffff7fcc630 in call_init (l=<optimized out>, argc=argc@entry=1,
argv=argv@entry=0xfffffffff068, env=env@entry=0xfffffffff078)
at dl-init.c:74
#10 0x0000fffff7fcc72c in call_init (env=0xfffffffff078, argv=0xfffffffff068,
argc=1, l=<optimized out>) at dl-init.c:37
#11 _dl_init (main_map=0xfffff7fff280, argc=1, argv=0xfffffffff068,
env=0xfffffffff078) at dl-init.c:121
#12 0x0000fffff7fbee08 in _dl_start_user () from /lib/ld-linux-aarch64.so.1
Thank you for helping.</pre>
</div>
</p>
<hr>
<span>You are receiving this mail because:</span>
<ul>
<li>You are on the CC list for the bug.</li>
</ul>
</body>
</html>