diff mbox

use in_infcall instead of proceed_to_finish

Message ID 1406875104-13501-1-git-send-email-yao@codesourcery.com
State New, archived
Headers

Commit Message

Yao Qi Aug. 1, 2014, 6:38 a.m. UTC 
  Hi,
When I read this line below in run_inferior_call,

  call_thread->control.proceed_to_finish = 1;

I am confused, and wonder why this flag (about command finish) should
be set for inferior call.  Looks it is used as a flag to save
stop_registers.  However, it is still confusing, IMO.  When GDB does
inferior call, flag in_infcall is set, so we can save stop_registers
when either proceed_to_finish or in_infcall is true, which is easy
to understand.  That is what this patch does.

Regression tested on x86_64-linux and arm-none-eabi.  OK to apply?

gdb:

2014-08-01  Yao Qi  <yao@codesourcery.com>

	* gdbthread.h (struct thread_control_state) <proceed_to_finish>:
	Update comments.
	* infcall.c (run_inferior_call): Don't set proceed_to_finish.
	* infrun.c: Update comments to stop_registers.
	(normal_stop): Save stop_registers when in_infcall is true.
---
 gdb/gdbthread.h |  3 +--
 gdb/infcall.c   |  3 ---
 gdb/infrun.c    | 11 ++++++-----
 3 files changed, 7 insertions(+), 10 deletions(-)
diff mbox

Patch

diff --git a/gdb/gdbthread.h b/gdb/gdbthread.h
index 522b674..794f4d2 100644
--- a/gdb/gdbthread.h
+++ b/gdb/gdbthread.h
@@ -106,8 +106,7 @@  struct thread_control_state
      by keep_going.  */
   int trap_expected;
 
-  /* Nonzero if the thread is being proceeded for a "finish" command
-     or a similar situation when stop_registers should be saved.  */
+  /* Nonzero if the thread is being proceeded for a "finish" command.  */
   int proceed_to_finish;
 
   /* Nonzero if the thread is being proceeded for an inferior function
diff --git a/gdb/infcall.c b/gdb/infcall.c
index 5c65bb5..da09585 100644
--- a/gdb/infcall.c
+++ b/gdb/infcall.c
@@ -400,9 +400,6 @@  run_inferior_call (struct thread_info *call_thread, CORE_ADDR real_pc)
 
   disable_watchpoints_before_interactive_call_start ();
 
-  /* We want stop_registers, please...  */
-  call_thread->control.proceed_to_finish = 1;
-
   TRY_CATCH (e, RETURN_MASK_ALL)
     {
       int was_sync = sync_execution;
diff --git a/gdb/infrun.c b/gdb/infrun.c
index 33aa674..57464c5 100644
--- a/gdb/infrun.c
+++ b/gdb/infrun.c
@@ -355,9 +355,9 @@  show_stop_on_solib_events (struct ui_file *file, int from_tty,
 int stop_after_trap;
 
 /* Save register contents here when executing a "finish" command or are
-   about to pop a stack dummy frame, if-and-only-if proceed_to_finish is set.
-   Thus this contains the return value from the called function (assuming
-   values are returned in a register).  */
+   about to pop a stack dummy frame, if-and-only-if proceed_to_finish
+   or in_infcall is set.  Thus this contains the return value from the
+   called function (assuming values are returned in a register).  */
 
 struct regcache *stop_registers;
 
@@ -6191,8 +6191,9 @@  normal_stop (void)
 
   /* Save the function value return registers, if we care.
      We might be about to restore their previous contents.  */
-  if (inferior_thread ()->control.proceed_to_finish
-      && execution_direction != EXEC_REVERSE)
+  if ((inferior_thread ()->control.proceed_to_finish
+       && execution_direction != EXEC_REVERSE)
+      || inferior_thread ()->control.in_infcall)
     {
       /* This should not be necessary.  */
       if (stop_registers)