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<base href="http://llvm.org/bugs/" />
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<body><table border="1" cellspacing="0" cellpadding="8">
<tr>
<th>Bug ID</th>
<td><a class="bz_bug_link
bz_status_NEW "
title="NEW --- - crash with -fsanitize=undefined during Firefox build"
href="http://llvm.org/bugs/show_bug.cgi?id=17402">17402</a>
</td>
</tr>
<tr>
<th>Summary</th>
<td>crash with -fsanitize=undefined during Firefox build
</td>
</tr>
<tr>
<th>Product</th>
<td>clang
</td>
</tr>
<tr>
<th>Version</th>
<td>trunk
</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>normal
</td>
</tr>
<tr>
<th>Priority</th>
<td>P
</td>
</tr>
<tr>
<th>Component</th>
<td>-New Bugs
</td>
</tr>
<tr>
<th>Assignee</th>
<td>unassignedclangbugs@nondot.org
</td>
</tr>
<tr>
<th>Reporter</th>
<td>octoploid@yandex.com
</td>
</tr>
<tr>
<th>CC</th>
<td>llvmbugs@cs.uiuc.edu
</td>
</tr>
<tr>
<th>Classification</th>
<td>Unclassified
</td>
</tr></table>
<p>
<div>
<pre>During a build of Firefox with -fsanitize=undefined I get:
clang++ -o nsEscape.o -c -I../../dist/stl_wrappers -I../../dist/system_wrappers
-include /home/markus/mozilla-central/config/gcc_hidden.h -DMOZ_GLUE_IN_PROGRAM
-DMOZILLA_INTE
RNAL_API -DIMPL_LIBXUL -DSTATIC_EXPORTABLE_JS_API -DNO_NSPR_10_SUPPORT
-DOS_POSIX=1 -DOS_LINUX=1 -I/home/markus/mozilla-central/ipc/chromium/src
-I/home/markus/mozilla-cent
ral/ipc/glue -I../../ipc/ipdl/_ipdlheaders -I..
-I/home/markus/mozilla-central/xpcom/io -I. -I../../dist/include
-I/var/tmp/moz-build-dir/dist/include/nspr -I/var/tmp/moz-b
uild-dir/dist/include/nss -fPIC -Qunused-arguments -DMOZILLA_CLIENT
-include ../../mozilla-config.h -MD -MP -MF .deps/nsEscape.o.pp
-Qunused-arguments -Qunused-argume
nts -Wall -Wpointer-arith -Woverloaded-virtual -Werror=return-type
-Wtype-limits -Wempty-body -Wsign-compare -Wno-invalid-offsetof
-Wno-c++0x-extensions -Wno-extended-offseto
f -Wno-unknown-warning-option -Wno-return-type-c-linkage -Wno-mismatched-tags
-fsanitize=undefined -fno-sanitize=vptr -march=native -fno-exceptions
-fno-strict-aliasing -fno-
rtti -fno-exceptions -fno-math-errno -std=gnu++0x -pthread -pipe -DNDEBUG
-DTRIMMED -O3 -fomit-frame-pointer
/home/markus/mozilla-central/xpcom/io/nsEscape.cpp
nsIOUtil.o
clang-3.4: error: unable to execute command: Segmentation fault
clang-3.4: error: clang frontend command failed due to signal (use -v to see
invocation)
clang version 3.4 (<a href="http://llvm.org/git/clang.git">http://llvm.org/git/clang.git</a>
5c805e92a5f70a913bc3bfcd15c44875974c2111) (<a href="http://llvm.org/git/llvm.git">http://llvm.org/git/llvm.git</a>
3f4f420ab7acb10221ba971543a7eed5489fb626)
Target: x86_64-unknown-linux-gnu
Thread model: posix
Reduced:
markus@x4 io % cat test.ii
typedef enum {
url_XPAlphas = 1
} nsEscapeMask;
int a;
int *b;
char d[] = "";
int *fn1(nsEscapeMask p1) {
int *e = 0;
if (p1 == 0)
for (;; a++) {
int c = *e++;
if (p1)
*b++ = 0;
*b++ = d[c];
}
return 0;
}
markus@x4 io % clang++ -Wall -Wextra -c -fsanitize=undefined -std=gnu++0x -O3
test.ii
clang-3.4: error: unable to execute command: Segmentation fault
clang-3.4: error: clang frontend command failed due to signal (use -v to see
invocation)
clang version 3.4 (<a href="http://llvm.org/git/clang.git">http://llvm.org/git/clang.git</a>
5c805e92a5f70a913bc3bfcd15c44875974c2111) (<a href="http://llvm.org/git/llvm.git">http://llvm.org/git/llvm.git</a>
3f4f420ab7acb10221ba971543a7eed5489fb626)
Target: x86_64-unknown-linux-gnu
Thread model: posix
clang-3.4: note: diagnostic msg: PLEASE submit a bug report to
<a href="http://llvm.org/bugs/">http://llvm.org/bugs/</a> and include the crash backtrace, preprocessed source, and
associated run script.
clang-3.4: note: diagnostic msg: Error generating preprocessed source(s) - no
preprocessable inputs.</pre>
</div>
</p>
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