------- Additional Comments From ctsa at u dot washington dot edu 2005-02-07
23:12 -------
(In reply to comment #0)
> I'm getting a segfault on what I believe to be valid code using gcc 4.0 but
> not
> when using gcc 3.4 or 3.3. I've reduced this situation down to a relatively
> short testcase file, details follow.
>
> testcase.cc:
> """
> #include <cstring>
> #include <map>
> #include <utility>
>
> using namespace std;
>
> struct ltstr
> {
> bool operator()(const char* s1, const char* s2) const
> {
> return strcmp(s1, s2) < 0;
> }
> };
>
>
> char codon_trans_known(const char*c){
> typedef map<const char*,char,ltstr> lup_map;
>
> const static pair<const char*,char> tab_tmp[] = {
>
>
make_pair("TTT",'F'),make_pair("TCT",'S'),make_pair("TAT",'Y'),make_pair("TGT",'C'),
>
>
make_pair("TTC",'F'),make_pair("TCC",'S'),make_pair("TAC",'Y'),make_pair("TGC",'C'),
>
>
make_pair("TTA",'L'),make_pair("TCA",'S'),make_pair("TAA",'*'),make_pair("TGA",'*'),
>
>
make_pair("TTG",'L'),make_pair("TCG",'S'),make_pair("TAG",'*'),make_pair("TGG",'W'),
>
>
>
make_pair("CTT",'L'),make_pair("CCT",'P'),make_pair("CAT",'H'),make_pair("CGT",'R'),
>
>
make_pair("CTC",'L'),make_pair("CCC",'P'),make_pair("CAC",'H'),make_pair("CGC",'R'),
>
>
make_pair("CTA",'L'),make_pair("CCA",'P'),make_pair("CAA",'Q'),make_pair("CGA",'R'),
>
>
make_pair("CTG",'L'),make_pair("CCG",'P'),make_pair("CAG",'Q'),make_pair("CGG",'R'),
>
>
>
make_pair("ATT",'I'),make_pair("ACT",'T'),make_pair("AAT",'N'),make_pair("AGT",'S'),
>
>
make_pair("ATC",'I'),make_pair("ACC",'T'),make_pair("AAC",'N'),make_pair("AGC",'S'),
>
>
make_pair("ATA",'I'),make_pair("ACA",'T'),make_pair("AAA",'K'),make_pair("AGA",'R'),
>
>
make_pair("ATG",'M'),make_pair("ACG",'T'),make_pair("AAG",'K'),make_pair("AGG",'R'),
>
>
>
make_pair("GTT",'V'),make_pair("GCT",'A'),make_pair("GAT",'D'),make_pair("GGT",'G'),
>
>
make_pair("GTC",'V'),make_pair("GCC",'A'),make_pair("GAC",'D'),make_pair("GGC",'G'),
>
>
make_pair("GTA",'V'),make_pair("GCA",'A'),make_pair("GAA",'E'),make_pair("GGA",'G'),
>
>
make_pair("GTG",'V'),make_pair("GCG",'A'),make_pair("GAG",'E'),make_pair("GGG",'G')};
>
> const static int tsize = sizeof(tab_tmp)/sizeof(tab_tmp[0]);
>
> const static lup_map codon_table1(tab_tmp,tab_tmp+tsize);
>
> lup_map::const_iterator s=codon_table1.find(c);
> if( s != codon_table1.end() ){
> return s->second;
> } else {
> return 'X';
> }
> }
>
>
> main(){
> char a = codon_trans_known("AAA");
> }
> """
>
> when I build with the following optimizations:
> g++ -O2 -finline-functions -finline-limit=604 testcase.cc
>
> ...I get a segfault with any value of inline-limit =< 604 . This only occurs
> with -O2 or -O3, so I haven't been able to get a meaningful backtrace either.
> All I can tell is that an invalid char pointer has been passed to the strcmp
> call in ltstr.
>
>
> I'm using this week's gcc snapshot:
>
> $ gcc -v
> Using built-in specs.
> Configured with: /home/ctsa/tmp/gcc-4.0-20050130/configure --disable-checking
> --prefix=/home/ctsa/opt/i686-linux/gcc-4.0-20050130 --enable-concept-checks
> --enable-languages=c,c++ --enable-__cxa_atexit
> Thread model: posix
> gcc version 4.0.0 20050130 (experimental)
>
> I've also observed this problem with last week's snapshot build of 4.0
> (20050123), but cannot replicate this with 3.4.3 or 3.3.5
Note that that's any value for inline-limit equal to or GREATER than 604.
--
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=19813
