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Re: [PATCH] Fix PR16508
- From: Yao Qi <yao at codesourcery dot com>
- To: Pedro Alves <palves at redhat dot com>
- Cc: Tom Tromey <tromey at redhat dot com>, <gdb-patches at sourceware dot org>
- Date: Thu, 6 Mar 2014 11:36:47 +0800
- Subject: Re: [PATCH] Fix PR16508
- Authentication-results: sourceware.org; auth=none
- References: <1392447370-22318-1-git-send-email-yao at codesourcery dot com> <87lhwo76qv dot fsf at fleche dot redhat dot com> <53178A28 dot 8060206 at redhat dot com>
On 03/06/2014 04:33 AM, Pedro Alves wrote:
> Note that the first argument to prepare_for_testing is
> what is passed to untested (and really only used for that),
> so a better alternative even is to do:
>
> if [prepare_for_testing "failed to prepare for trace tests" \
> $executable $srcfile [list debug]] {
>
> Although we do that all over the place, passing $expfile
> to untested is useless, as that information will be
> in the gdb.sum before UNTESTED anyway.
>
> I'd support us starting to use this pattern more.
OK, let us use this pattern. Patch below is pushed in.
--
Yao (éå)
commit ccd34f75c5f6e05469f80ceece793de62fdf66db
Author: Yao Qi <yao@codesourcery.com>
Date: Sat Feb 15 08:48:53 2014 +0800
Fix PR16508
This patch fixes PR16508, which is about MI "-trace-find frame-number 0"
behaves differently from CLI "tfind 0". In CLI, we check both
status->running and status->filename, but in MI, we only check
status->running, which looks wrong to me. This patch moves the code
of checking to a new function check_trace_running, and use it in
both CLI and MI.
This patch also adds a test case pr16508.exp, which fails without this
fix, and passes with the fix applied.
FAIL: gdb.trace/pr16508.exp: interpreter-exec mi "-trace-find frame-number 0"
gdb:
2014-03-06 Yao Qi <yao@codesourcery.com>
PR breakpoints/16508
* tracepoint.c (check_trace_running): New function.
(trace_find_command): Move code to check_trace_running and
call check_trace_running.
(trace_find_pc_command): Likewise.
(trace_find_tracepoint_command): Likewise.
(trace_find_line_command): Likewise.
(trace_find_range_command): Likewise.
* tracepoint.h (check_trace_running): Likewise.
* mi/mi-main.c (mi_cmd_trace_find): Call check_trace_running.
gdb/testsuite:
2014-03-06 Yao Qi <yao@codesourcery.com>
* gdb.trace/pr16508.exp: New file.
diff --git a/gdb/ChangeLog b/gdb/ChangeLog
index e3911e9..b5a92fb 100644
--- a/gdb/ChangeLog
+++ b/gdb/ChangeLog
@@ -1,5 +1,18 @@
2014-03-06 Yao Qi <yao@codesourcery.com>
+ PR breakpoints/16508
+ * tracepoint.c (check_trace_running): New function.
+ (trace_find_command): Move code to check_trace_running and
+ call check_trace_running.
+ (trace_find_pc_command): Likewise.
+ (trace_find_tracepoint_command): Likewise.
+ (trace_find_line_command): Likewise.
+ (trace_find_range_command): Likewise.
+ * tracepoint.h (check_trace_running): Likewise.
+ * mi/mi-main.c (mi_cmd_trace_find): Call check_trace_running.
+
+2014-03-06 Yao Qi <yao@codesourcery.com>
+
* target.h (struct target_ops) <to_traceframe_info>: Use
TARGET_DEFAULT_NORETURN (tcomplain ()).
* target-delegates.c: Regenerated.
diff --git a/gdb/mi/mi-main.c b/gdb/mi/mi-main.c
index 6983e49..8941743 100644
--- a/gdb/mi/mi-main.c
+++ b/gdb/mi/mi-main.c
@@ -2484,8 +2484,7 @@ mi_cmd_trace_find (char *command, char **argv, int argc)
return;
}
- if (current_trace_status ()->running)
- error (_("May not look at trace frames while trace is running."));
+ check_trace_running (current_trace_status ());
if (strcmp (mode, "frame-number") == 0)
{
diff --git a/gdb/testsuite/ChangeLog b/gdb/testsuite/ChangeLog
index 65b4f95..a078554 100644
--- a/gdb/testsuite/ChangeLog
+++ b/gdb/testsuite/ChangeLog
@@ -1,3 +1,7 @@
+2014-03-06 Yao Qi <yao@codesourcery.com>
+
+ * gdb.trace/pr16508.exp: New file.
+
2014-03-05 Pedro Alves <palves@redhat.com>
PR gdb/16575
diff --git a/gdb/testsuite/gdb.trace/pr16508.exp b/gdb/testsuite/gdb.trace/pr16508.exp
new file mode 100644
index 0000000..ff01b40
--- /dev/null
+++ b/gdb/testsuite/gdb.trace/pr16508.exp
@@ -0,0 +1,63 @@
+# Copyright 2014 Free Software Foundation, Inc.
+# This program is free software; you can redistribute it and/or modify
+# it under the terms of the GNU General Public License as published by
+# the Free Software Foundation; either version 3 of the License, or
+# (at your option) any later version.
+#
+# This program is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+# GNU General Public License for more details.
+#
+# You should have received a copy of the GNU General Public License
+# along with this program. If not, see <http://www.gnu.org/licenses/>.
+
+load_lib "trace-support.exp"
+
+standard_testfile read-memory.c
+set executable $testfile
+
+if [prepare_for_testing "failed to prepare for trace tests" \
+ $executable $srcfile [list debug]] {
+ return -1
+}
+
+if ![runto_main] {
+ fail "Can't run to main to check for trace support"
+ return -1
+}
+
+if ![gdb_target_supports_trace] {
+ unsupported "target does not support trace"
+ return -1
+}
+
+gdb_test "trace start" ".*"
+gdb_breakpoint "end"
+
+gdb_test_no_output "tstart"
+
+gdb_test "continue" ".*Breakpoint \[0-9\]+, end .*"
+
+set tracefile [standard_output_file ${testfile}]
+
+# Save trace frames to tfile.
+gdb_test "tsave ${tracefile}.tf" \
+ "Trace data saved to file '${tracefile}.tf'.*" \
+ "save tfile trace file"
+
+# Change target to tfile.
+set test "change to tfile target"
+gdb_test_multiple "target tfile ${tracefile}.tf" "$test" {
+ -re "A program is being debugged already. Kill it. .y or n. " {
+ send_gdb "y\n"
+ exp_continue
+ }
+ -re "$gdb_prompt $" {
+ pass "$test"
+ }
+}
+
+gdb_test "tfind 0" "Found trace frame 0, tracepoint .*"
+
+gdb_test "interpreter-exec mi \"-trace-find frame-number 0\"" "done.*"
diff --git a/gdb/tracepoint.c b/gdb/tracepoint.c
index 51d59b6..cea40e3 100644
--- a/gdb/tracepoint.c
+++ b/gdb/tracepoint.c
@@ -2443,6 +2443,15 @@ tfind_1 (enum trace_find_type type, int num,
}
}
+/* Error on looking at traceframes while trace is running. */
+
+void
+check_trace_running (struct trace_status *status)
+{
+ if (status->running && status->filename == NULL)
+ error (_("May not look at trace frames while trace is running."));
+}
+
/* trace_find_command takes a trace frame number n,
sends "QTFrame:<n>" to the target,
and accepts a reply that may contain several optional pieces
@@ -2463,9 +2472,7 @@ trace_find_command (char *args, int from_tty)
{ /* This should only be called with a numeric argument. */
int frameno = -1;
- if (current_trace_status ()->running
- && current_trace_status ()->filename == NULL)
- error (_("May not look at trace frames while trace is running."));
+ check_trace_running (current_trace_status ());
if (args == 0 || *args == 0)
{ /* TFIND with no args means find NEXT trace frame. */
@@ -2515,9 +2522,7 @@ trace_find_pc_command (char *args, int from_tty)
{
CORE_ADDR pc;
- if (current_trace_status ()->running
- && current_trace_status ()->filename == NULL)
- error (_("May not look at trace frames while trace is running."));
+ check_trace_running (current_trace_status ());
if (args == 0 || *args == 0)
pc = regcache_read_pc (get_current_regcache ());
@@ -2534,9 +2539,7 @@ trace_find_tracepoint_command (char *args, int from_tty)
int tdp;
struct tracepoint *tp;
- if (current_trace_status ()->running
- && current_trace_status ()->filename == NULL)
- error (_("May not look at trace frames while trace is running."));
+ check_trace_running (current_trace_status ());
if (args == 0 || *args == 0)
{
@@ -2574,9 +2577,7 @@ trace_find_line_command (char *args, int from_tty)
struct symtab_and_line sal;
struct cleanup *old_chain;
- if (current_trace_status ()->running
- && current_trace_status ()->filename == NULL)
- error (_("May not look at trace frames while trace is running."));
+ check_trace_running (current_trace_status ());
if (args == 0 || *args == 0)
{
@@ -2640,9 +2641,7 @@ trace_find_range_command (char *args, int from_tty)
static CORE_ADDR start, stop;
char *tmp;
- if (current_trace_status ()->running
- && current_trace_status ()->filename == NULL)
- error (_("May not look at trace frames while trace is running."));
+ check_trace_running (current_trace_status ());
if (args == 0 || *args == 0)
{ /* XXX FIXME: what should default behavior be? */
diff --git a/gdb/tracepoint.h b/gdb/tracepoint.h
index 6b00b30..8a1abbf 100644
--- a/gdb/tracepoint.h
+++ b/gdb/tracepoint.h
@@ -334,6 +334,8 @@ extern void query_if_trace_running (int from_tty);
extern void disconnect_tracing (void);
extern void trace_reset_local_state (void);
+extern void check_trace_running (struct trace_status *);
+
extern void start_tracing (char *notes);
extern void stop_tracing (char *notes);