Bug 161562
| Summary: | gdb failing to recognize types at first | ||
|---|---|---|---|
| Product: | [Fedora] Fedora | Reporter: | Joe Orton <jorton> |
| Component: | gdb | Assignee: | Jan Kratochvil <jan.kratochvil> |
| Status: | CLOSED INSUFFICIENT_DATA | QA Contact: | |
| Severity: | medium | Docs Contact: | |
| Priority: | medium | ||
| Version: | 4 | CC: | cagney |
| Target Milestone: | --- | ||
| Target Release: | --- | ||
| Hardware: | All | ||
| OS: | Linux | ||
| Whiteboard: | |||
| Fixed In Version: | Doc Type: | Bug Fix | |
| Doc Text: | Story Points: | --- | |
| Clone Of: | Environment: | ||
| Last Closed: | 2008-02-17 04:10:53 UTC | Type: | --- |
| Regression: | --- | Mount Type: | --- |
| Documentation: | --- | CRM: | |
| Verified Versions: | Category: | --- | |
| oVirt Team: | --- | RHEL 7.3 requirements from Atomic Host: | |
| Cloudforms Team: | --- | Target Upstream Version: | |
| Embargoed: | |||
This is reproducible with the core dump from https://bugzilla.redhat.com/bugzilla/attachment.cgi?id=115920 in bug 160480 (gzipped) an up to date FC4 install: gdb-6.3.0.0-1.21 php-5.0.4-10 php-debuginfo-5.0.4-10 [root@trash ~]# gdb /usr/sbin/httpd core.4350 ... Loaded symbols for /usr/lib/php/modules/mysqli.so #0 0x020f4efd in zend_hash_del_key_or_index (ht=0x8ff19bc, arKey=Variable "arKey" is not available. ) at /usr/src/debug/php-5.0.4/Zend/zend_hash.c:462 462 p = ht->arBuckets[nIndex]; (gdb) ptype ps_globals type = <data variable, no debug info> (gdb) print ps_globals $1 = 145746432 (gdb) print (char *)ps_globals $2 = 0x8afea00 "/var/lib/php/session" (gdb) ptype ps_globals type = <data variable, no debug info> (gdb) print ps_globals $3 = 145746432 (gdb) print (zend_ps_globals *)ps_globals $4 = (php_ps_globals *) 0x8afea00 (gdb) ptype ps_globals type = struct _php_ps_globals { char *save_path; char *session_name; ... etc and from then on, it's OK. This report targets the FC3 or FC4 products, which have now been EOL'd. Could you please check that it still applies to a current Fedora release, and either update the target product or close it ? Thanks. Fedora Core 4 is no longer maintained. Setting status to "INSUFFICIENT_DATA". If you can reproduce this bug in the current Fedora release, please reopen this bug and assign it to the corresponding Fedora version. |
I keep seeing this when trying to debug PHP: there is a global structure, ps_globals; when printing it the first time, gdb claims ignorance about its type. After printing it casted to the correct type, gdb will subsequently recognize the type as expected. Using debuginfo packages. (gdb) print ps_globals $2 = 160245824 (gdb) print (zend_ps_globals *)ps_globals $3 = (php_ps_globals *) 0x98d2840 (gdb) print (zend_ps_globals *)ps_globals $4 = (php_ps_globals *) 0x98d2840 (gdb) print ps_globals $5 = {save_path = 0x98d2840 "/var/lib/php/session", session_name = 0x9929ac0 "PHPSESSID", ... rest of structure, as expected.