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gdb: restore thread after detaching or killing an inferior

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The "detach inferiors N" command causes the current inferior to
switch.  E.g.:

  $ gdb a.out
  Reading symbols from a.out...
  (gdb) start
  ...
  (gdb) add-inferior
  [New inferior 2]
  Added inferior 2 on connection 1 (native)
  (gdb) inferior 2
  [Switching to inferior 2 [<null>] (<noexec>)]
  (gdb) info inferiors
    Num  Description       Connection           Executable
    1    process 18242     1 (native)           /path/to/a.out
  * 2    <null>            1 (native)
  (gdb) detach inferiors 1
  Detaching from program: /path/to/a.out, process 18242
  [Inferior 1 (process 18242) detached]
  (gdb) info inferiors
    Num  Description       Connection           Executable
  * 1    <null>                                 /path/to/a.out
    2    <null>            1 (native)
  (gdb)

The same switch happens with the "kill inferiors N" command.  Prevent
it by restoring the current thread.

gdb/ChangeLog:
2020-10-29  Tankut Baris Aktemur  <tankut.baris.aktemur@intel.com>

	PR gdb/19318
	* inferior.c (detach_inferior_command): Restore the current thread.
	(kill_inferior_command): Ditto.

gdb/testsuite/ChangeLog:
2020-10-29  Tankut Baris Aktemur  <tankut.baris.aktemur@intel.com>

	* gdb.base/kill-detach-inferiors-cmd.exp: Check that 'kill
	inferiors' and 'detach inferiors' do not change the current
	inferior.
This commit is contained in:
Tankut Baris Aktemur
2020-10-29 15:33:39 +01:00
parent 00c19b8e78
commit cfaa8f7692
4 changed files with 18 additions and 0 deletions
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6
gdb/ChangeLog
View File

@ -1,3 +1,9 @@
2020-10-29 Tankut Baris Aktemur <tankut.baris.aktemur@intel.com>
PR gdb/19318
* inferior.c (detach_inferior_command): Restore the current thread.
(kill_inferior_command): Ditto.
2020-10-28 Tom de Vries <tdevries@suse.de>
PR symtab/26772

4
gdb/inferior.c
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@ -547,6 +547,8 @@ detach_inferior_command (const char *args, int from_tty)
if (!args || !*args)
error (_("Requires argument (inferior id(s) to detach)"));
scoped_restore_current_thread restore_thread;
number_or_range_parser parser (args);
while (!parser.finished ())
{
@ -584,6 +586,8 @@ kill_inferior_command (const char *args, int from_tty)
if (!args || !*args)
error (_("Requires argument (inferior id(s) to kill)"));
scoped_restore_current_thread restore_thread;
number_or_range_parser parser (args);
while (!parser.finished ())
{

6
gdb/testsuite/ChangeLog
View File

@ -1,3 +1,9 @@
2020-10-29 Tankut Baris Aktemur <tankut.baris.aktemur@intel.com>
* gdb.base/kill-detach-inferiors-cmd.exp: Check that 'kill
inferiors' and 'detach inferiors' do not change the current
inferior.
2020-10-29 Tom de Vries <tdevries@suse.de>
* gdb.threads/tls.exp: Fix DUPLICATEs.

2
gdb/testsuite/gdb.base/kill-detach-inferiors-cmd.exp
View File

@ -46,9 +46,11 @@ gdb_test "attach $test_pid" "Attaching to process.*" "attach to pid"
# Kill the first two inferiors, and detach the third.
gdb_test_no_output "kill inferiors 1 2"
gdb_test "info inferiors 3" "\r\n\\* 3 \[^\r\n\]+" "inf 3 is still current"
gdb_test "inferior 1" "Switching to inferior 1.*"
gdb_test "kill" "The program is not being run.*"
gdb_test "detach inferiors 3" "Detaching from program.*process $test_pid.*"
gdb_test "info inferiors 1" "\r\n\\* 1 \[^\r\n\]+" "inf 1 is still current"
# No inferiors should be running anymore.
gdb_test "kill inferiors 1 2 3" \