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[1999-01-29 21:06 UTC] morrilie at hotmail dot com
The problem: segfaults in dbmfetch() and dbmfirstkey(). dbmopen(), dbmclose(), dbminsert() work fine. when running php from a shell script all is ok. Problem appears only when running php from commandline or as apache module. Sample script: #!/bin/sh php -f 003.php3t That's all. Same command on the cli causes segfault. php 3.0.6 apache 1.3.4 linux 2.0.36 gdbm 1.7.3 backtrace: #0 php3_dbmfetch(ht=0x80f93a8, return_value=0x80c745c, list=0x80e8920, plist=0x80e88f4) at functions/db.c:617 #1 phpparse() at control_functions_inline.h:930 #2 php3_parse(yyparse=0x80f3998) at main.c:1474 #3 main(...) at main.c:1782 #4 ___crt_dummy___ () Return_value, which is a pointer, has some small value , and writing results of the operation at functions/db.c:617 causes segfaults. I encountered values 0x5 0x6 0x1d. Just looked at *list. (it is a hashtable) - it has ridiculous fields! nTableSize = 1936287828 and others not differ much. *plist seems to make sense *ht - nonsense PatchesPull RequestsHistoryAllCommentsChangesGit/SVN commits
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Last updated: Fri May 09 03:01:30 2025 UTC |
This seems to be a bug in gcc (at least in version 2.7.2). If you want to test it, compile the following code with gcc 2.7.2 both with -fomit-frame-pointer and without. With -fomit-frame-pointer, it will segfault. At least on my Linux box. #include <stdio.h> #include <gdbm.h> int main(int argc, char **argv) { GDBM_FILE db; datum key, val; char* keystr = "key"; char* valstr = "value"; key.dptr = keystr; key.dsize = 3; val.dptr = valstr; val.dsize = 5; if ((db = gdbm_open("destroyme", 512, GDBM_WRCREAT, 0666, NULL)) != NULL) { if (!gdbm_store(db, key, val, GDBM_REPLACE)) { val = gdbm_fetch(db, key); printf("%u %s\n", val.dsize, val.dptr); gdbm_close(db); return 0; } printf("Couldn't store key!\n"); gdbm_close(db); return 2; } printf("Couldn't open db!\n"); return 1; }