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[Bug breakpoints/18063] New: Buggy behavior after single-stepping into inferior's SIGWINCH handler
- From: "patrick at parcs dot ath.cx" <sourceware-bugzilla at sourceware dot org>
- To: gdb-prs at sourceware dot org
- Date: Sat, 28 Feb 2015 15:38:52 +0000
- Subject: [Bug breakpoints/18063] New: Buggy behavior after single-stepping into inferior's SIGWINCH handler
- Auto-submitted: auto-generated
https://sourceware.org/bugzilla/show_bug.cgi?id=18063
Bug ID: 18063
Summary: Buggy behavior after single-stepping into inferior's
SIGWINCH handler
Product: gdb
Version: HEAD
Status: NEW
Severity: normal
Priority: P2
Component: breakpoints
Assignee: unassigned at sourceware dot org
Reporter: patrick at parcs dot ath.cx
GDB seems to malfunction after catching a SIGWINCH signal and stepping into the
program's SIGWINCH handler. In particular GDB seems to catch an endless stream
of SIGTRAPs when attempting to exit the SIGWINCH handler. This behavior can be
seen when debugging GDB with GDB:
$ gdb gdb
(gdb) catch signal SIGWINCH
Catchpoint 1 (signal SIGWINCH)
(gdb) run
Starting program: /scratchpad/binutils-gdb-build/gdb/gdb
(gdb) <resize terminal>
Catchpoint 1 (signal SIGWINCH), 0x00007ffff6d784f0 in poll () from
/lib/x86_64-linux-gnu/libc.so.6
(gdb) step
Single stepping until exit from function poll,
which has no line number information.
rl_sigwinch_handler (sig=28) at
/home/patrick/code/binutils-gdb/readline/signals.c:246
246 {
(gdb) next
259 RL_SETSTATE(RL_STATE_SIGHANDLER);
(gdb) finish
Run till exit from #0 rl_sigwinch_handler (sig=28) at
/home/patrick/code/binutils-gdb/readline/signals.c:246
Program received signal SIGTRAP, Trace/breakpoint trap.
rl_sigwinch_handler (sig=28) at
/home/patrick/code/binutils-gdb/readline/signals.c:260
260 rl_resize_terminal ();
(gdb) finish
Run till exit from #0 rl_sigwinch_handler (sig=28) at
/home/patrick/code/binutils-gdb/readline/signals.c:260
Program received signal SIGTRAP, Trace/breakpoint trap.
rl_resize_terminal () at
/home/patrick/code/binutils-gdb/readline/terminal.c:364
364 {
(gdb) <ad infinitum..>
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