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[Bug breakpoints/15184] New: Cannot change dprintf style to agentfor existing dprintfs
- From: "marc.khouzam at ericsson dot com" <sourceware-bugzilla at sourceware dot org>
- To: gdb-prs at sourceware dot org
- Date: Sun, 24 Feb 2013 13:39:29 +0000
- Subject: [Bug breakpoints/15184] New: Cannot change dprintf style to agentfor existing dprintfs
- Auto-submitted: auto-generated
http://sourceware.org/bugzilla/show_bug.cgi?id=15184
Bug #: 15184
Summary: Cannot change dprintf style to agent for existing
dprintfs
Product: gdb
Version: HEAD
Status: NEW
Severity: normal
Priority: P2
Component: breakpoints
AssignedTo: unassigned@sourceware.org
ReportedBy: marc.khouzam@ericsson.com
Classification: Unclassified
Updating the dprintf-style to 'agent' for existing dprintfs will cause: "May
only run agent-printf on the target" when it is time to print and it will
interrupt the inferior.
Here's a session showing the problem:
> gdb.7.6 ~/loopfirst
GNU gdb (GDB) 7.5.50.20130223-cvs
(gdb) l
1 #include <unistd.h>
2 #include <stdio.h>
3
4 int main() {
5 for (int i=0;i<20;i++) {
6 printf("hello");
7 printf("friend\n");
8 printf("home\n");
9 sleep(1);
10 }
(gdb) target remote :9999
Remote debugging using :9999
Reading symbols from /lib/ld-linux.so.2...(no debugging symbols found)...done.
Loaded symbols for /lib/ld-linux.so.2
0x00110850 in ?? () from /lib/ld-linux.so.2
(gdb) dprintf 8,"welcome\n"
Dprintf 1 at 0x804855f: file loopfirst.cc, line 8.
(gdb) b 9
Breakpoint 2 at 0x804856b: file loopfirst.cc, line 9.
(gdb) info b
Num Type Disp Enb Address What
1 dprintf keep y 0x0804855f in main() at loopfirst.cc:8
printf "welcome\n"
continue
2 breakpoint keep y 0x0804856b in main() at loopfirst.cc:9
(gdb) c
Continuing.
welcome
Breakpoint 2, main () at loopfirst.cc:9
9 sleep(1);
(gdb) set dprintf-style agent
(gdb) info b
Num Type Disp Enb Address What
1 dprintf keep y 0x0804855f in main() at loopfirst.cc:8
breakpoint already hit 1 time
agent-printf "welcome\n"
2 breakpoint keep y 0x0804856b in main() at loopfirst.cc:9
breakpoint already hit 1 time
(gdb) c
Continuing.
May only run agent-printf on the target
(gdb) bt
#0 main () at loopfirst.cc:8
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