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and subject line Bug#185242: libstdc++5-dev: rope segfaults under heavy load
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From: Ian Turner <[EMAIL PROTECTED]>
To: Debian Bug Tracking System <[EMAIL PROTECTED]>
Subject: libstdc++5-dev: rope segfaults under heavy load
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Date: Mon, 17 Mar 2003 20:44:11 -0800
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Package: libstdc++5-dev
Version: 1:3.2.3-0pre5
Severity: important
Consider the following program:
--- BEGIN ropetest.c ---
#include <ext/rope>
using namespace std;
using namespace __gnu_cxx;
unsigned int rand(unsigned int max) {
unsigned int rval = (unsigned int)(((double)max)*rand()/(RAND_MAX));
if (rval == max)
return max-1;
}
int main() {
crope r;
char buf[10240];
while (1) {
if (rand(2) && r.size() < 1024*1024) {
r.append(buf, rand(10240));
} else if (r.size() > 10240) {
r.erase(0, rand(10240));
}
}
return 0;
}
--- END ropetest.c ---
It crashes when compiled with g++-3.0 or g++-3.2 (but not on g++ 2.95):
$ g++ ropetest.c -o ropetest-295 -Wall
$ ./ropetest-295
[ press CTRL-C ]
$ g++-3.0 ropetest.c -o ropetest-300 -Wall
$ ./ropetest-300
Segmentation fault
$ g++-3.2 ropetest.c -o ropetest-320 -Wall -g
$ ./ropetest-320
Aborted
$ gdb g++-3.2
GNU gdb 5.3-debian
[ snip ]
(gdb) run
Starting program: ropetest-320
Program received signal SIGABRT, Aborted.
0x40113a51 in kill () from /lib/libc.so.6
(gdb) bt
#0 0x40113a51 in kill () from /lib/libc.so.6
#1 0x40113872 in raise () from /lib/libc.so.6
#2 0x40114986 in abort () from /lib/libc.so.6
#3 0x4009a9a0 in __cxa_call_unexpected () from /usr/lib/libstdc++.so.5
#4 0x4009a9e4 in std::terminate() () from /usr/lib/libstdc++.so.5
#5 0x4009ab31 in __cxa_throw () from /usr/lib/libstdc++.so.5
#6 0x4009ace1 in operator new(unsigned) () from /usr/lib/libstdc++.so.5
#7 0x4008a4c9 in std::allocator<char>::allocate(unsigned, void const*) ()
from /usr/lib/libstdc++.so.5
#8 0x0804935f in __gnu_cxx::rope<char, std::allocator<char>
>::_S_RopeLeaf_from_unowned_char_ptr(char const*, unsigned,
std::allocator<char>) (
__s=0xbfffd190 "", __size=1073779424, __a={<No data fields>})
at /usr/include/c++/3.2/ext/stl_rope.h:1412
#9 0x08048eef in __gnu_cxx::rope<char, std::allocator<char>
>::_S_destr_concat_char_iter(__gnu_cxx::_Rope_RopeRep<char,
std::allocator<char> >*, char const*, unsigned) (__r=0x0, __s=0xbfffd190 "",
__slen=1073779424)
at /usr/include/c++/3.2/ext/ropeimpl.h:557
#10 0x08048e2d in __gnu_cxx::rope<char, std::allocator<char> >::append(char
const*, unsigned) (this=0xbffff9a0, __iter=0xbfffd190 "", __n=1073779424)
at /usr/include/c++/3.2/ext/stl_rope.h:1795
#11 0x08048c6b in main () at ropetest.cc:19
-- System Information
Debian Release: testing/unstable
Architecture: i386
Kernel: Linux crafter 2.4.19 #1 Fri Sep 27 18:25:53 PDT 2002 i686
Locale: LANG=C, LC_CTYPE=C
Versions of packages libstdc++5-dev depends on:
ii g++-3.2 1:3.2.3-0pre5 The GNU C++ compiler
ii gcc-3.2-base 1:3.2.3-0pre5 The GNU Compiler Collection (base
ii libc6-dev 2.3.1-14 GNU C Library: Development Librari
ii libstdc++5 1:3.2.3-0pre5 The GNU Standard C++ Library v3
---------------------------------------
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Date: Sun, 6 Jul 2003 09:37:12 +0200
To: [EMAIL PROTECTED]
Subject: Re: Bug#185242: libstdc++5-dev: rope segfaults under heavy load
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Not reproducible anymore with current g++-3.2 and g++-3.3, no feedback
received since Thu, 17 Apr 2003 21:36:48 +0200
