[PATCH 11/15] More target unification

[Gary Benson <gbenson@redhat.com>]

This unifies a few more top-level target functions -- target_resume,
target_wait, and target_stop -- and the declaration of the variable
"non_stop".  This follows the usual pattern, where clients of "common"
are expected to define the objects appropriately, thus simplifying
common/agent.c a bit more.

gdb/
2014-07-09  Tom Tromey  <tromey@redhat.com>

	* target/target.h (target_resume, target_wait, target_stop)
	(non_stop): Moved from target.h.
	* target.h (target_resume, target_wait, target_stop, non_stop):
	Move to target/target.h.
	* common/agent.c (agent_run_command): Always use target_resume,
	target_stop, and target_wait.

gdb/gdbserver/
2014-07-09  Tom Tromey  <tromey@redhat.com>

	* target.c (target_wait, target_stop, target_resume): New
	functions.
---
 gdb/ChangeLog           |    9 +++++++++
 gdb/common/agent.c      |   27 +--------------------------
 gdb/gdbserver/ChangeLog |    5 +++++
 gdb/gdbserver/target.c  |   34 ++++++++++++++++++++++++++++++++++
 gdb/target.h            |   31 -------------------------------
 gdb/target/target.h     |   38 ++++++++++++++++++++++++++++++++++++++
 6 files changed, 87 insertions(+), 57 deletions(-)

diff --git a/gdb/common/agent.c b/gdb/common/agent.c
index 52de3d4..0fde2fd 100644
--- a/gdb/common/agent.c
+++ b/gdb/common/agent.c
@@ -230,18 +230,7 @@ agent_run_command (int pid, const char *cmd, int len)
   DEBUG_AGENT ("agent: resumed helper thread\n");
 
   /* Resume helper thread.  */
-#ifdef GDBSERVER
-{
-  struct thread_resume resume_info;
-
-  resume_info.thread = ptid;
-  resume_info.kind = resume_continue;
-  resume_info.sig = GDB_SIGNAL_0;
-  (*the_target->resume) (&resume_info, 1);
-}
-#else
- target_resume (ptid, 0, GDB_SIGNAL_0);
-#endif
+  target_resume (ptid, 0, GDB_SIGNAL_0);
 
   fd = gdb_connect_sync_socket (pid);
   if (fd >= 0)
@@ -277,25 +266,11 @@ agent_run_command (int pid, const char *cmd, int len)
       int was_non_stop = non_stop;
       /* Stop thread PTID.  */
       DEBUG_AGENT ("agent: stop helper thread\n");
-#ifdef GDBSERVER
-      {
-	struct thread_resume resume_info;
-
-	resume_info.thread = ptid;
-	resume_info.kind = resume_stop;
-	resume_info.sig = GDB_SIGNAL_0;
-	(*the_target->resume) (&resume_info, 1);
-      }
-
-      non_stop = 1;
-      mywait (ptid, &status, 0, 0);
-#else
       non_stop = 1;
       target_stop (ptid);
 
       memset (&status, 0, sizeof (status));
       target_wait (ptid, &status, 0);
-#endif
       non_stop = was_non_stop;
     }
 
diff --git a/gdb/gdbserver/target.c b/gdb/gdbserver/target.c
index 44e1e11..f93163e 100644
--- a/gdb/gdbserver/target.c
+++ b/gdb/gdbserver/target.c
@@ -134,6 +134,40 @@ mywait (ptid_t ptid, struct target_waitstatus *ourstatus, int options,
   return ret;
 }
 
+/* See target/target.h.  */
+
+ptid_t
+target_wait (ptid_t ptid, struct target_waitstatus *status, int options)
+{
+  return mywait (ptid, status, options, 0);
+}
+
+/* See target/target.h.  */
+
+void
+target_stop (ptid_t ptid)
+{
+  struct thread_resume resume_info;
+
+  resume_info.thread = ptid;
+  resume_info.kind = resume_stop;
+  resume_info.sig = GDB_SIGNAL_0;
+  (*the_target->resume) (&resume_info, 1);
+}
+
+/* See target/target.h.  */
+
+void
+target_resume (ptid_t ptid, int step, enum gdb_signal signal)
+{
+  struct thread_resume resume_info;
+
+  resume_info.thread = ptid;
+  resume_info.kind = step ? resume_step : resume_continue;
+  resume_info.sig = GDB_SIGNAL_0;
+  (*the_target->resume) (&resume_info, 1);
+}
+
 int
 start_non_stop (int nonstop)
 {
diff --git a/gdb/target.h b/gdb/target.h
index 8a2faca..2a4783c 100644
--- a/gdb/target.h
+++ b/gdb/target.h
@@ -1191,31 +1191,6 @@ extern void target_detach (const char *, int);
 
 extern void target_disconnect (const char *, int);
 
-/* Resume execution of the target process PTID (or a group of
-   threads).  STEP says whether to single-step or to run free; SIGGNAL
-   is the signal to be given to the target, or GDB_SIGNAL_0 for no
-   signal.  The caller may not pass GDB_SIGNAL_DEFAULT.  A specific
-   PTID means `step/resume only this process id'.  A wildcard PTID
-   (all threads, or all threads of process) means `step/resume
-   INFERIOR_PTID, and let other threads (for which the wildcard PTID
-   matches) resume with their 'thread->suspend.stop_signal' signal
-   (usually GDB_SIGNAL_0) if it is in "pass" state, or with no signal
-   if in "no pass" state.  */
-
-extern void target_resume (ptid_t ptid, int step, enum gdb_signal signal);
-
-/* Wait for process pid to do something.  PTID = -1 to wait for any
-   pid to do something.  Return pid of child, or -1 in case of error;
-   store status through argument pointer STATUS.  Note that it is
-   _NOT_ OK to throw_exception() out of target_wait() without popping
-   the debugging target from the stack; GDB isn't prepared to get back
-   to the prompt with a debugging target but without the frame cache,
-   stop_pc, etc., set up.  OPTIONS is a bitwise OR of TARGET_W*
-   options.  */
-
-extern ptid_t target_wait (ptid_t ptid, struct target_waitstatus *status,
-			   int options);
-
 /* Fetch at least register REGNO, or all regs if regno == -1.  No result.  */
 
 extern void target_fetch_registers (struct regcache *regcache, int regno);
@@ -1557,12 +1532,6 @@ extern int target_thread_alive (ptid_t ptid);
 
 extern void target_find_new_threads (void);
 
-/* Make target stop in a continuable fashion.  (For instance, under
-   Unix, this should act like SIGSTOP).  This function is normally
-   used by GUIs to implement a stop button.  */
-
-extern void target_stop (ptid_t ptid);
-
 /* Send the specified COMMAND to the target's monitor
    (shell,interpreter) for execution.  The result of the query is
    placed in OUTBUF.  */
diff --git a/gdb/target/target.h b/gdb/target/target.h
index b3bd719..cb96181 100644
--- a/gdb/target/target.h
+++ b/gdb/target/target.h
@@ -22,6 +22,37 @@
 
 /* This header is a stopgap until more code is shared.  */
 
+/* Resume execution of the target process PTID (or a group of
+   threads).  STEP says whether to single-step or to run free; SIGGNAL
+   is the signal to be given to the target, or GDB_SIGNAL_0 for no
+   signal.  The caller may not pass GDB_SIGNAL_DEFAULT.  A specific
+   PTID means `step/resume only this process id'.  A wildcard PTID
+   (all threads, or all threads of process) means `step/resume
+   INFERIOR_PTID, and let other threads (for which the wildcard PTID
+   matches) resume with their 'thread->suspend.stop_signal' signal
+   (usually GDB_SIGNAL_0) if it is in "pass" state, or with no signal
+   if in "no pass" state.  */
+
+extern void target_resume (ptid_t ptid, int step, enum gdb_signal signal);
+
+/* Wait for process pid to do something.  PTID = -1 to wait for any
+   pid to do something.  Return pid of child, or -1 in case of error;
+   store status through argument pointer STATUS.  Note that it is
+   _NOT_ OK to throw_exception() out of target_wait() without popping
+   the debugging target from the stack; GDB isn't prepared to get back
+   to the prompt with a debugging target but without the frame cache,
+   stop_pc, etc., set up.  OPTIONS is a bitwise OR of TARGET_W*
+   options.  */
+
+extern ptid_t target_wait (ptid_t ptid, struct target_waitstatus *status,
+			   int options);
+
+/* Make target stop in a continuable fashion.  (For instance, under
+   Unix, this should act like SIGSTOP).  This function is normally
+   used by GUIs to implement a stop button.  */
+
+extern void target_stop (ptid_t ptid);
+
 extern int target_read_memory (CORE_ADDR memaddr, gdb_byte *myaddr,
 			       ssize_t len);
 
@@ -31,4 +62,11 @@ extern int target_read_uint32 (CORE_ADDR memaddr, unsigned int *result);
 extern int target_write_memory (CORE_ADDR memaddr, const gdb_byte *myaddr,
 				ssize_t len);
 
+/* If set, the inferior should be controlled in non-stop mode.  In
+   this mode, each thread is controlled independently.  Execution
+   commands apply only to the selected thread by default, and stop
+   events stop only the thread that had the event -- the other threads
+   are kept running freely.  */
+extern int non_stop;
+
 #endif /* TARGET_COMMON_H */
-- 
1.7.1