public inbox for gdb-prs@sourceware.org
help / color / mirror / Atom feed
* [Bug gdb/30338] New: GDB skips line when using "stepi" but keeps line when using "step".
@ 2023-04-12 13:12 hluaw at connect dot ust.hk
0 siblings, 0 replies; only message in thread
From: hluaw at connect dot ust.hk @ 2023-04-12 13:12 UTC (permalink / raw)
To: gdb-prs
https://sourceware.org/bugzilla/show_bug.cgi?id=30338
Bug ID: 30338
Summary: GDB skips line when using "stepi" but keeps line when
using "step".
Product: gdb
Version: 13.1
Status: UNCONFIRMED
Severity: normal
Priority: P2
Component: gdb
Assignee: unassigned at sourceware dot org
Reporter: hluaw at connect dot ust.hk
Target Milestone: ---
Given the code:
int a, b;
int c(void) { a = b & 5; }
int d() { c(); }
int func_1() {
char e;
for (; e;);
}
int main() {
int f;
func_1();
for (; f < 10; f++)
d();
}
Compile with GCC 12.2.0 -O1
Break at func_1, using step and stepi yield different result.
Specifically, step will stop at line 12, while stepi skips line 12.
step
6 for (; e;);
(gdb) s
main () at r.c:11
11 for (; f < 10; f++)
(gdb) s
12 d();
(gdb) s
d () at r.c:3
3 int d() { c(); }
stepi
6 for (; e;);
(gdb) si
main () at r.c:11
11 for (; f < 10; f++)
(gdb)
d () at r.c:3
3 int d() { c(); }
readelf yields this.
[0x0000007c] Special opcode 76: advance Address by 5 to 0x40112d and Line by 1
to 12
[0x0000007d] Advance Line by -9 to 3
It seems that line 12 contains no code?
Is it expected that stepi and step diverges?
--
You are receiving this mail because:
You are on the CC list for the bug.
^ permalink raw reply [flat|nested] only message in thread
only message in thread, other threads:[~2023-04-12 13:12 UTC | newest]
Thread overview: (only message) (download: mbox.gz / follow: Atom feed)
-- links below jump to the message on this page --
2023-04-12 13:12 [Bug gdb/30338] New: GDB skips line when using "stepi" but keeps line when using "step" hluaw at connect dot ust.hk
This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox;
as well as URLs for read-only IMAP folder(s) and NNTP newsgroup(s).