[PATCH 11/15 v2] 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/
2014-07-16  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/
2014-07-16  Tom Tromey  <tromey@redhat.com>
	    Gary Benson  <gbenson@redhat.com>

	* target.c (target_wait, target_stop, target_resume): New
	functions.
---
 gdb/ChangeLog           |    9 +++++++++
 gdb/common/agent.c      |   27 +--------------------------
 gdb/gdbserver/ChangeLog |    6 ++++++
 gdb/gdbserver/target.c  |   34 ++++++++++++++++++++++++++++++++++
 gdb/target.h            |   31 -------------------------------
 gdb/target/target.h     |   39 +++++++++++++++++++++++++++++++++++++++
 6 files changed, 89 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..6ba375c 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 = signal;
+  (*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 4ac3440..1b34ce2 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);
+
 /* Read LEN bytes of target memory at address MEMADDR, placing the
    results in GDB's memory at MYADDR.  Return zero for success,
    nonzero if any error occurs.  Implementations of this function may
@@ -54,4 +85,12 @@ 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