<html>
<head>
<base href="http://llvm.org/bugs/" />
</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 --- - AddressSanitizerFunctionPass assertion due to lifetime intrinsic"
href="http://llvm.org/bugs/show_bug.cgi?id=17867">17867</a>
</td>
</tr>
<tr>
<th>Summary</th>
<td>AddressSanitizerFunctionPass assertion due to lifetime intrinsic
</td>
</tr>
<tr>
<th>Product</th>
<td>libraries
</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>Transformation Utilities
</td>
</tr>
<tr>
<th>Assignee</th>
<td>unassignedbugs@nondot.org
</td>
</tr>
<tr>
<th>Reporter</th>
<td>nicholas@mxc.ca
</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>echo 'int main() { unsigned char c = 0; return 0; }' |
llvm-commit/Debug+Asserts/bin/clang -x c - -fsanitize=address,use-after-scope
Produces this crash:
clang: AddressSanitizer.cpp:1476: void
{anonymous}::FunctionStackPoisoner::poisonStack(): Assertion `AI' failed.
By the way, I can't seem to reproduce this with just a .bc file and opt, even
with all the hidden flags. Please make sure that this is possible.
0x00007ffff69ec1e5 in __GI_raise (sig=sig@entry=6)
at ../nptl/sysdeps/unix/sysv/linux/raise.c:56
56 ../nptl/sysdeps/unix/sysv/linux/raise.c: No such file or directory.
(gdb) bt
#0 0x00007ffff69ec1e5 in __GI_raise (sig=sig@entry=6)
at ../nptl/sysdeps/unix/sysv/linux/raise.c:56
#1 0x00007ffff69ef398 in __GI_abort () at abort.c:90
#2 0x00007ffff69e5272 in __assert_fail_base (
fmt=0x7ffff6b22900 "%s%s%s:%u: %s%sAssertion `%s' failed.\n%n",
assertion=assertion@entry=0x3ad4c04 "AI",
file=file@entry=0x3ad45ca "AddressSanitizer.cpp", line=line@entry=1476,
function=function@entry=0x3adb0a0 <(anonymous
namespace)::FunctionStackPoisoner::poisonStack()::__PRETTY_FUNCTION__> "void
{anonymous}::FunctionStackPoisoner::poisonStack()") at assert.c:92
#3 0x00007ffff69e5322 in __GI___assert_fail (assertion=0x3ad4c04 "AI",
file=0x3ad45ca "AddressSanitizer.cpp", line=1476,
function=0x3adb0a0 <(anonymous
namespace)::FunctionStackPoisoner::poisonStack()::__PRETTY_FUNCTION__> "void
{anonymous}::FunctionStackPoisoner::poisonStack()") at assert.c:101
#4 0x000000000212a6a1 in (anonymous
namespace)::FunctionStackPoisoner::poisonStack (this=0x7fffffffbf60) at
AddressSanitizer.cpp:1476
#5 0x0000000002124b92 in (anonymous
namespace)::FunctionStackPoisoner::runOnFunction (this=0x7fffffffbf60) at
AddressSanitizer.cpp:451
#6 0x0000000002129164 in (anonymous
namespace)::AddressSanitizer::runOnFunction (this=0x53055b0, F=...) at
AddressSanitizer.cpp:1243
#7 0x0000000003070aa2 in llvm::FPPassManager::runOnFunction (this=0x5305b80,
F=...) at PassManager.cpp:1530
(gdb) frame 4
#4 0x000000000212a6a1 in (anonymous
namespace)::FunctionStackPoisoner::poisonStack (this=0x7fffffffbf60) at
AddressSanitizer.cpp:1476
1476 assert(AI);
(gdb) p AllocaPoisonCallVec.size()
$3 = 2
(gdb) p i
$6 = 0
(gdb) p AllocaVec[i]
$7 = (llvm::AllocaInst *&) @0x7fffffffc158: 0x528a608
(gdb) p AllocaVec[i]->dump()
%retval = alloca i32, align 4
$8 = void
(gdb) p APC
$9 = (const (anonymous namespace)::FunctionStackPoisoner::AllocaPoisonCall &)
@0x7fffffffc318: {
InsBefore = 0x52e5608,
Size = 1,
DoPoison = false
}
(gdb) p ((llvm::Instruction*)APC.InsBefore)->dump()
call void @llvm.lifetime.start(i64 1, i8* %c) #1
$11 = void</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>