Re: [PATCH v2] Fix PR gdb/18653: gdb disturbs inferior's inherited signal dispositions

[Yao Qi <qiyaoltc@gmail.com>]

Pedro Alves <palves@redhat.com> writes:

> diff --git a/gdb/testsuite/gdb.base/signals-state-child.exp b/gdb/testsuite/gdb.base/signals-state-child.exp
> new file mode 100644
> index 0000000..f5fdcb2

> +
> +set gdb_txt [standard_output_file gdb.txt]
> +set standalone_txt [standard_output_file standalone.txt]
> +remote_exec host "rm -f $gdb_txt"
> +remote_exec host "rm -f $standalone_txt"
> +
> +set options [list debug "additional_flags=-DOUTPUT_TXT=\"$gdb_txt\""]
> +if {[build_executable $testfile.exp $testfile $srcfile $options]} {
> +    untested $testfile.exp
> +    return -1
> +}

$gdb_txt and $standalone_txt is the file location on build, but we pass
them to the test file, which will be run on target.  It won't work if
build != target.

> +
> +set options [list debug "additional_flags=-DOUTPUT_TXT=\"$standalone_txt\""]
> +if {[build_executable $testfile.exp $testfile-standalone $srcfile $options]} {
> +    untested $testfile.exp
> +    return -1
> +}
> +
> +# Run the program directly, and dump its initial signal actions and
> +# mask in "standalone.txt".
> +
> +# Use remote_spawn instead of remote_exec, like how we spawn gdb.
> +# This is in order to take the same code code paths in dejagnu
> +# compared to when running the program through gdb.  E.g., because
> +# local_exec uses -ignore SIGHUP, while remote_spawn does not, if we
> +# used remote_exec, the test program would start with SIGHUP ignored
> +# when run standalone, but not when run through gdb.
> +set res [remote_spawn host "$binfile-standalone"]

s/host/target/

> +if { $res < 0 || $res == "" } {
> +    untested "spawning $binfile-standalone failed"
> +    return 1
> +} else {
> +    pass "collect standalone signals state"
> +}
> +remote_close host

How about the patch below?  It follows the way we fix the problem of
this kind in mi-traceframe-changed.exp and tfile.exp.

How about the patch below?  It should go to master and 7.12 branch.

-- 
Yao (齐尧)

From 6be8c11c9dc2f733449c1a988dee5f8354f5dfc6 Mon Sep 17 00:00:00 2001
From: Yao Qi <yao.qi@linaro.org>
Date: Fri, 19 Aug 2016 14:49:31 +0100
Subject: [PATCH] Fix signals-state-child.exp in remote testing

Remote testing isn't considered in signals-state-child.exp, so the it
fails like

shell diff -s /scratch/yao/gdb/build-git/aarch64-linux-gnu/gdb/testsuite/outputs/gdb.base/signals-state-child/standalone.txt /scratch/yao/gdb/build-git/aarch64-linux-gnu/gdb/testsuite/outputs/gdb.base/signals-state-child/gdb.txt^M
diff: /scratch/yao/gdb/build-git/aarch64-linux-gnu/gdb/testsuite/outputs/gdb.base/signals-state-child/standalone.txt: No such file or directory^M
(gdb) FAIL: gdb.base/signals-state-child.exp: signals states are identical

This patch is to fix it.

gdb/testsuite:

2016-08-22  Yao Qi  <yao.qi@linaro.org>

	* gdb.base/signals-state-child.exp: Set variables gdb_txt and
	standalone_txt.  Delete gdb_txt and standalone_txt on host
	and target.  Spawn the binary on target.  Copy files from
	target to host.

diff --git a/gdb/testsuite/gdb.base/signals-state-child.exp b/gdb/testsuite/gdb.base/signals-state-child.exp
index f5fdcb2..cd6a9a5 100644
--- a/gdb/testsuite/gdb.base/signals-state-child.exp
+++ b/gdb/testsuite/gdb.base/signals-state-child.exp
@@ -29,10 +29,20 @@
 
 standard_testfile
 
-set gdb_txt [standard_output_file gdb.txt]
-set standalone_txt [standard_output_file standalone.txt]
-remote_exec host "rm -f $gdb_txt"
-remote_exec host "rm -f $standalone_txt"
+if {![is_remote host] && ![is_remote target]} {
+    set gdb_txt [standard_output_file gdb.txt]
+    set standalone_txt [standard_output_file standalone.txt]
+    set purely_local 1
+} else {
+    set gdb_txt gdb.txt
+    set standalone_txt standalone.txt
+    set purely_local 0
+}
+
+remote_file host delete $gdb_txt
+remote_file host delete $standalone_txt
+remote_file target delete $gdb_txt
+remote_file target delete $standalone_txt
 
 set options [list debug "additional_flags=-DOUTPUT_TXT=\"$gdb_txt\""]
 if {[build_executable $testfile.exp $testfile $srcfile $options]} {
@@ -55,14 +65,14 @@ if {[build_executable $testfile.exp $testfile-standalone $srcfile $options]} {
 # local_exec uses -ignore SIGHUP, while remote_spawn does not, if we
 # used remote_exec, the test program would start with SIGHUP ignored
 # when run standalone, but not when run through gdb.
-set res [remote_spawn host "$binfile-standalone"]
+set res [remote_spawn target "$binfile-standalone"]
 if { $res < 0 || $res == "" } {
     untested "spawning $binfile-standalone failed"
     return 1
 } else {
     pass "collect standalone signals state"
 }
-remote_close host
+remote_close target
 
 # Now run the program through gdb, and dump its initial signal actions
 # and mask in "gdb.txt".
@@ -76,6 +86,12 @@ if { ! [ runto_main ] } then {
 
 gdb_continue_to_end "collect signals state under gdb"
 
+if {!$purely_local} {
+    # Copy file from target to host through build.
+    remote_download host [remote_upload target gdb.txt] gdb.txt
+    remote_download host [remote_upload target standalone.txt] standalone.txt
+}
+
 # Diff the .txt files.  They should be identical.
 gdb_test "shell diff -s $standalone_txt $gdb_txt" \
     "Files .* are identical.*" \