Package: gcc-4.0 Version: 4.0.2-4 Severity: important gcc -O2 -falign-loops=4 -fomit-frame-pointer -funroll-loops -o buggy buggy.c smarenka@v13sid:~/scratch/segfault-csound$ ./buggy DBname = >>English.xmg<< Segmentation fault If you drop any single one of the parameters, it works. Dropping -O2 to -O1 also works. I wasn't able to find a simpler file that illustrated the problem, but the attached are pretty short. This code works fine on the other ports. Thanks, Stephen -- Stephen R. Marenka If life's not fun, you're not doing it right! <stephen@marenka.net>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#define X_MAXNUM 1832
#define X_HEADER "CSOUND_STRINGS\n"
#define DEBUG (1)
long benlong(long lval) /* coerce a natural long into a bigendian long */
{
char benchar[4];
char *p = benchar;
*p++ = (char)(0xFF & (lval >> 24));
*p++ = (char)(0xFF & (lval >> 16));
*p++ = (char)(0xFF & (lval >> 8));
*p = (char)(0xFF & lval);
return(*(long *)benchar);
}
/* String file will have a header string (X_HEADER) and then 10 characters
making a language for identification
*/
int main(int argc, char **argv)
{
char buff[256];
long strings[X_MAXNUM];
long loc, baseloc;
int j;
int n;
long item = 0;
FILE *db;
FILE *raw;
char dbname[16];
char lang[30] = {'E', 'n', 'g', 'l', 'i', 's', 'h', '\0'};
int order = ('t'<<24)|('x'<<16)|('t'<<8);
if (argc>=2) raw = fopen(argv[1], "rb");
else raw = fopen("onestring", "rb");
if (raw == NULL) {
fprintf(stderr, "Failed to open input file\n");
exit(1);
}
if (argc==3) {
/* 7 is length of `English' and there are 10 maximum */
int len = strlen(argv[2]);
if (len>29) len = 29;
strncpy(lang, argv[2], len);
memset(lang+len, '\0', 30-len); /* Null rest */
}
strcpy(dbname, lang); strcat(dbname, ".xmg"); /* ****** */
if (DEBUG) fprintf(stderr, "DBname = >>%s<<\n", dbname);
db = fopen(dbname, "wb");
if (db == NULL) {
fprintf(stderr, "Failed to create DB file\n");
exit(1);
}
fwrite(&order, sizeof(int), 1, db);
fwrite(X_HEADER, sizeof(X_HEADER)-1, 1, db);
fwrite(lang, sizeof(char), 30, db);
n = X_MAXNUM;
n = benlong(n);
fwrite(&n, sizeof(long), 1, db);
baseloc = ftell(db);
for (j=0; j<X_MAXNUM; j++) strings[j] = 0L;
fwrite(strings, sizeof(long), X_MAXNUM, db); /* Write header */
loc = ftell(db);
if (DEBUG) fprintf(stderr, "Baseloc=%lx Loc=%lx\n", baseloc, loc);
for (;;) { /* Read the text until ended */
long n = 0;
long i;
int ch = getc(raw);
while (ch=='\r' || ch =='\n') ch = getc(raw);
if (DEBUG) fprintf(stderr, "Read '%c'(%.2x)\n", ch, ch);
while (isdigit(ch)) {
if (DEBUG) fprintf(stderr, "Read '%c'(%.2x)\n", ch, ch);
n = n*10+ch-'0';
ch = getc(raw);
}
if (DEBUG) fprintf(stderr, "String# %ld\n", n);
if (ch==EOF) break;
if (ch!=',') {
fprintf(stderr,
"item %ld/%ld: Syntax error -- expecting comma got '%c'%2x\n",
item, n, ch, ch);
exit(1);
}
item = n;
i = 0;
while ((ch=getc(raw))!='"') ;
/* Now read the string */
while ((ch = getc(raw))!='"') {
if (ch=='\\') {
ch=getc(raw);
switch (ch) {
case 'a':
ch = '\a'; break;
case 'b':
ch = '\b'; break;
case 'n':
ch = '\n'; break;
case 'r':
ch = '\r'; break;
case 't':
ch = '\t'; break;
default:
break;
}
}
buff[i++]=ch;
}
buff[i++] = '\0';
strings[n] = loc;
n = benlong(i);
fwrite(&n, sizeof(long), 1, db);
fwrite(buff, sizeof(char), i, db);
loc = ftell(db);
while ((ch=getc(raw))!='\n');
}
fseek(db, baseloc, SEEK_SET);
for (j=0; j<X_MAXNUM; j++) strings[j] = benlong(strings[j]);
fwrite(strings, sizeof(long), X_MAXNUM, db); /* rewrite header */
fclose(raw);
fclose(db);
fprintf(stderr, "OK\n");
return(0);
}
1,"debug:\n"
Attachment:
signature.asc
Description: Digital signature