This is the mail archive of the
gdb-prs@sourceware.org
mailing list for the GDB project.
[Bug gdb/15562] New: record: lowest instr# is 0, not 1
- From: "jan.kratochvil at redhat dot com" <sourceware-bugzilla at sourceware dot org>
- To: gdb-prs at sourceware dot org
- Date: Sun, 02 Jun 2013 14:28:41 +0000
- Subject: [Bug gdb/15562] New: record: lowest instr# is 0, not 1
- Auto-submitted: auto-generated
http://sourceware.org/bugzilla/show_bug.cgi?id=15562
Bug ID: 15562
Summary: record: lowest instr# is 0, not 1
Product: gdb
Version: HEAD
Status: NEW
Severity: normal
Priority: P2
Component: gdb
Assignee: unassigned at sourceware dot org
Reporter: jan.kratochvil at redhat dot com
Target: x86_64-unknown-linux-gnu
In the sample output below is:
Lowest recorded instruction number is 1.
but there should be:
Lowest recorded instruction number is 0.
This patch is looks like working but it is not right:
record_full_info:
/* Find entry for first actual instruction in the log. */
- for (p = record_full_first.next;
+ for (p = &record_full_first;
IMO the static record record_full_first should not exist, all records should be
dynamically allocated with only pointers to them.
This bug is there at least already in gdb-7.2.
(gdb) x/3i $pc
=> 0x48ed37 <main+15>: lea -0x20(%rbp),%rax
0x48ed3b <main+19>: mov $0x20,%edx
0x48ed40 <main+24>: mov $0x0,%esi
(gdb) record
(gdb) stepi
0x000000000048ed3b 29 memset (&args, 0, sizeof args);
(gdb) stepi
0x000000000048ed40 29 memset (&args, 0, sizeof args);
(gdb) info record
Active record target: record-full
Record mode:
Lowest recorded instruction number is 1.
Highest recorded instruction number is 2.
Log contains 2 instructions.
Max logged instructions is 10000000.
(gdb) record goto 1
Go backward to insn number 1
#0 0x000000000048ed3b in main (argc=1, argv=0x7fffffffdb08) at gdb.c:29
29 memset (&args, 0, sizeof args);
(gdb) x/i $pc
=> 0x48ed3b <main+19>: mov $0x20,%edx
(gdb) record goto 0
Go backward to insn number 0
#0 main (argc=1, argv=0x7fffffffdb08) at gdb.c:29
29 memset (&args, 0, sizeof args);
(gdb) x/i $pc
=> 0x48ed37 <main+15>: lea -0x20(%rbp),%rax
--
You are receiving this mail because:
You are on the CC list for the bug.