| Summary: | Wrong DWARF computation? | ||
|---|---|---|---|
| Product: | [Fedora] Fedora | Reporter: | Jan Kratochvil <jan.kratochvil> |
| Component: | gdb | Assignee: | Jan Kratochvil <jan.kratochvil> |
| Status: | CLOSED ERRATA | QA Contact: | Fedora Extras Quality Assurance <extras-qa> |
| Severity: | unspecified | Docs Contact: | |
| Priority: | unspecified | ||
| Version: | 15 | CC: | jakub, jan.kratochvil, pmuldoon, sergiodj, tromey |
| Target Milestone: | --- | ||
| Target Release: | --- | ||
| Hardware: | Unspecified | ||
| OS: | Linux | ||
| Whiteboard: | |||
| Fixed In Version: | gdb-7.3-43.fc15 | Doc Type: | Bug Fix |
| Doc Text: | Story Points: | --- | |
| Clone Of: | Environment: | ||
| Last Closed: | 2011-09-07 00:16:16 UTC | Type: | --- |
| Regression: | --- | Mount Type: | --- |
| Documentation: | --- | CRM: | |
| Verified Versions: | Category: | --- | |
| oVirt Team: | --- | RHEL 7.3 requirements from Atomic Host: | |
| Cloudforms Team: | --- | Target Upstream Version: | |
It might be a bug Tom Tromey fixed some time ago in sleb128 parsing in gdb. [commit] Fix sleb128 reading http://sourceware.org/ml/gdb-patches/2011-07/msg00270.html gdb-7.3-43.fc15 has been submitted as an update for Fedora 15. https://admin.fedoraproject.org/updates/gdb-7.3-43.fc15 Package gdb-7.3-43.fc15: * should fix your issue, * was pushed to the Fedora 15 testing repository, * should be available at your local mirror within two days. Update it with: # su -c 'yum update --enablerepo=updates-testing gdb-7.3-43.fc15' as soon as you are able to. Please go to the following url: https://admin.fedoraproject.org/updates/gdb-7.3-43.fc15 then log in and leave karma (feedback). gdb-7.3-43.fc15 has been pushed to the Fedora 15 stable repository. If problems still persist, please make note of it in this bug report. |
Jakub Jelinek: I'm seeing something which looks like a gdb bug, at least on F15 volatile int v; __attribute__((noinline, noclone)) unsigned long long foo (unsigned long long x) { unsigned long long j = x * -(0x17ULL << 31);/* { dg-final { gdb-test 12 "j" "-(0x17ULL << 31)" } } */ v++; return x; } int main () { return foo (1) - 1; } gdb prints 18446744073709550592 instead of the expected 18446744013580009472 the DWARF has DW_OP_breg5 0 DW_OP_consts -49392123904 DW_OP_mul DW_OP_stack_value for j (gdb) p/x 18446744073709550592LL $1 = 0xfffffffffffffc00 (gdb) p/x 18446744013580009472LL $2 = 0xfffffff200000000