From 0c7e1a4602a41a1caf637823f67948be31d27732 Mon Sep 17 00:00:00 2001 From: Pedro Alves Date: Tue, 18 Mar 2014 17:50:28 +0000 Subject: PR gdb/13860: make "-exec-foo"'s MI output equal to "foo"'s MI output. Part of PR gdb/13860 is about the mi-solib.exp test's output being different in sync vs async modes. sync: >./gdb -nx -q ./testsuite/gdb.mi/solib-main -ex "set stop-on-solib-events 1" -ex "set target-async off" -i=mi =thread-group-added,id="i1" ~"Reading symbols from /home/pedro/gdb/mygit/build/gdb/testsuite/gdb.mi/solib-main..." ~"done.\n" (gdb) &"start\n" ~"Temporary breakpoint 1 at 0x400608: file ../../../src/gdb/testsuite/gdb.mi/solib-main.c, line 21.\n" =breakpoint-created,bkpt={number="1",type="breakpoint",disp="del",enabled="y",addr="0x0000000000400608",func="main",file="../../../src/gdb/testsuite/gdb.mi/solib-main.c",fullname="/home/pedro/gdb/mygit/src/gdb/testsuite/gdb.mi/solib-main.c",line="21",times="0",original-location="main"} ~"Starting program: /home/pedro/gdb/mygit/build/gdb/testsuite/gdb.mi/solib-main \n" =thread-group-started,id="i1",pid="17724" =thread-created,id="1",group-id="i1" ^running *running,thread-id="all" (gdb) =library-loaded,id="/lib64/ld-linux-x86-64.so.2",target-name="/lib64/ld-linux-x86-64.so.2",host-name="/lib64/ld-linux-x86-64.so.2",symbols-loaded="0",thread-group="i1" ~"Stopped due to shared library event (no libraries added or removed)\n" *stopped,reason="solib-event",frame={addr="0x000000379180f990",func="_dl_debug_state",args=[],from="/lib64/ld-linux-x86-64.so.2"},thread-id="1",stopped-threads="all",core="3" (gdb) async: >./gdb -nx -q ./testsuite/gdb.mi/solib-main -ex "set stop-on-solib-events 1" -ex "set target-async on" -i=mi =thread-group-added,id="i1" ~"Reading symbols from /home/pedro/gdb/mygit/build/gdb/testsuite/gdb.mi/solib-main..." ~"done.\n" (gdb) start &"start\n" ~"Temporary breakpoint 1 at 0x400608: file ../../../src/gdb/testsuite/gdb.mi/solib-main.c, line 21.\n" =breakpoint-created,bkpt={number="1",type="breakpoint",disp="del",enabled="y",addr="0x0000000000400608",func="main",file="../../../src/gdb/testsuite/gdb.mi/solib-main.c",fullname="/home/pedro/gdb/mygit/src/gdb/testsuite/gdb.mi/solib-main.c",line="21",times="0",original-location="main"} ~"Starting program: /home/pedro/gdb/mygit/build/gdb/testsuite/gdb.mi/solib-main \n" =thread-group-started,id="i1",pid="17729" =thread-created,id="1",group-id="i1" ^running *running,thread-id="all" =library-loaded,id="/lib64/ld-linux-x86-64.so.2",target-name="/lib64/ld-linux-x86-64.so.2",host-name="/lib64/ld-linux-x86-64.so.2",symbols-loaded="0",thread-group="i1" (gdb) *stopped,reason="solib-event",thread-id="1",stopped-threads="all",core="1" For now, let's focus only on the *stopped event. We see that the async output is missing frame info. And this causes a test failure in async mode, as "mi_expect_stop solib-event" wants to see the frame info. However, if we compare the event output when a real MI execution command is used, compared to a CLI command (e.g., run vs -exec-run, next vs -exec-next, etc.), we see: >./gdb -nx -q ./testsuite/gdb.mi/solib-main -ex "set stop-on-solib-events 1" -ex "set target-async off" -i=mi =thread-group-added,id="i1" ~"Reading symbols from /home/pedro/gdb/mygit/build/gdb/testsuite/gdb.mi/solib-main..." ~"done.\n" (gdb) r &"r\n" ~"Starting program: /home/pedro/gdb/mygit/build/gdb/testsuite/gdb.mi/solib-main \n" =thread-group-started,id="i1",pid="17751" =thread-created,id="1",group-id="i1" ^running *running,thread-id="all" (gdb) =library-loaded,id="/lib64/ld-linux-x86-64.so.2",target-name="/lib64/ld-linux-x86-64.so.2",host-name="/lib64/ld-linux-x86-64.so.2",symbols-loaded="0",thread-group="i1" ~"Stopped due to shared library event (no libraries added or removed)\n" *stopped,reason="solib-event",frame={addr="0x000000379180f990",func="_dl_debug_state",args=[],from="/lib64/ld-linux-x86-64.so.2"},thread-id="1",stopped-threads="all",core="3" (gdb) -exec-run =thread-exited,id="1",group-id="i1" =thread-group-exited,id="i1" =library-unloaded,id="/lib64/ld-linux-x86-64.so.2",target-name="/lib64/ld-linux-x86-64.so.2",host-name="/lib64/ld-linux-x86-64.so.2",thread-group="i1" =thread-group-started,id="i1",pid="17754" =thread-created,id="1",group-id="i1" ^running *running,thread-id="all" (gdb) =library-loaded,id="/lib64/ld-linux-x86-64.so.2",target-name="/lib64/ld-linux-x86-64.so.2",host-name="/lib64/ld-linux-x86-64.so.2",symbols-loaded="0",thread-group="i1" *stopped,reason="solib-event",thread-id="1",stopped-threads="all",core="1" =thread-selected,id="1" (gdb) As seen above, with MI commands, the *stopped event _doesn't_ have frame info. This is because normal_stop, as commanded by the result of bpstat_print, skips printing frame info in this case (it's an "event", not a "breakpoint"), and when the interpreter is MI, mi_on_normal_stop skips calling print_stack_frame, as the normal_stop call was already done with the MI uiout. This explains why the async output is different even with a CLI command. Its because in async mode, the mi_on_normal_stop path is always taken; it is always reached with the MI uiout, because the stop is handled from the event loop, instead of from within `proceed -> wait_for_inferior -> normal_stop' with the interpreter overridden, as in sync mode. This patch fixes the issue by making all cases output the same *stopped event, by factoring out the print code from normal_stop, and using it from mi_on_normal_stop as well. I chose the *stopped output without a frame, mainly because that is what you already get if you use MI execution commands, the commands frontends are supposed to use (except when implementing a console). This patch makes it simpler to tweak the MI output differently if desired, as we only have to change the centralized print_stop_event (taking into account whether the uiout is MI-like), and all different modes will change accordingly. Tested on x86_64 Fedora 17, no regressions. The mi-solib.exp test no longer fails in async mode with this patch, so the patch removes the kfail. 2014-03-18 Pedro Alves PR gdb/13860 * inferior.h (print_stop_event): Declare. * infrun.c (print_stop_event): New, factored out from ... (normal_stop): ... this. * mi/mi-interp.c (mi_on_normal_stop): Use print_stop_event instead of bpstat_print/print_stack_frame. 2014-03-18 Pedro Alves PR gdb/13860 * gdb.mi/mi-solib.exp: Remove gdb/13860 kfail. * lib/mi-support.exp (mi_expect_stop): Add special handling for solib-event. --- gdb/inferior.h | 2 ++ 1 file changed, 2 insertions(+) (limited to 'gdb/inferior.h') diff --git a/gdb/inferior.h b/gdb/inferior.h index 6c0730af01..b15f692a65 100644 --- a/gdb/inferior.h +++ b/gdb/inferior.h @@ -195,6 +195,8 @@ extern void start_remote (int from_tty); extern void normal_stop (void); +extern void print_stop_event (struct target_waitstatus *ws); + extern int signal_stop_state (int); extern int signal_print_state (int); -- cgit v1.2.3