Patchwork [v3,1/2] Change iterate_over_breakpoints to take a function_view

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Submitter cbiesinger@chromium.org
Date Oct. 10, 2019, 12:04 a.m.
Message ID <20191010000403.189265-1-cbiesinger@chromium.org>
Download mbox | patch
Permalink /patch/34892/
State New
Headers show

Comments

cbiesinger@chromium.org - Oct. 10, 2019, 12:04 a.m.
From: Christian Biesinger <cbiesinger@google.com>

This allows callers to pass in capturing lambdas.  Also changes the return
type to bool.

2019-10-09  Christian Biesinger  <cbiesinger@google.com>

	* breakpoint.c (iterate_over_breakpoints): Change function pointer
	to a gdb::function_view and return value to bool.
	* breakpoint.h (iterate_over_breakpoints): Likewise.
	* dummy-frame.c (pop_dummy_frame_bpt): Update.
	(pop_dummy_frame): Update.
	* guile/scm-breakpoint.c (bpscm_build_bp_list): Update.
	(gdbscm_breakpoints): Update.
	* python/py-breakpoint.c (build_bp_list): Update.
	(gdbpy_breakpoints): Update.
	* python/py-finishbreakpoint.c (bpfinishpy_detect_out_scope_cb):
	Update.
	(bpfinishpy_handle_stop): Update.
	(bpfinishpy_handle_exit): Update.
	* solib-svr4.c (svr4_update_solib_event_breakpoint): Update.
	(svr4_update_solib_event_breakpoints): Update.
---
 gdb/breakpoint.c                 |  6 +++---
 gdb/breakpoint.h                 |  5 +++--
 gdb/dummy-frame.c                | 13 ++++++-------
 gdb/guile/scm-breakpoint.c       |  8 ++++----
 gdb/python/py-breakpoint.c       |  8 ++++----
 gdb/python/py-finishbreakpoint.c | 15 +++++++++------
 gdb/solib-svr4.c                 |  6 +++---
 7 files changed, 32 insertions(+), 29 deletions(-)

Patch

diff --git a/gdb/breakpoint.c b/gdb/breakpoint.c
index 0a705163386..e17cb69c3e6 100644
--- a/gdb/breakpoint.c
+++ b/gdb/breakpoint.c
@@ -15132,14 +15132,14 @@  save_command (const char *arg, int from_tty)
 }
 
 struct breakpoint *
-iterate_over_breakpoints (int (*callback) (struct breakpoint *, void *),
-			  void *data)
+iterate_over_breakpoints
+  (gdb::function_view<bool (breakpoint *)> callback)
 {
   struct breakpoint *b, *b_tmp;
 
   ALL_BREAKPOINTS_SAFE (b, b_tmp)
     {
-      if ((*callback) (b, data))
+      if (callback (b))
 	return b;
     }
 
diff --git a/gdb/breakpoint.h b/gdb/breakpoint.h
index 9791032c5e8..7472c0ecc45 100644
--- a/gdb/breakpoint.h
+++ b/gdb/breakpoint.h
@@ -29,6 +29,7 @@ 
 #include "location.h"
 #include <vector>
 #include "gdbsupport/array-view.h"
+#include "gdbsupport/function-view.h"
 #include "cli/cli-script.h"
 
 struct block;
@@ -1664,8 +1665,8 @@  public:
    returned.  This can be useful for implementing a search for a
    breakpoint with arbitrary attributes, or for applying an operation
    to every breakpoint.  */
-extern struct breakpoint *iterate_over_breakpoints (int (*) (struct breakpoint *,
-							     void *), void *);
+extern struct breakpoint *iterate_over_breakpoints
+  (gdb::function_view<bool (breakpoint *)>);
 
 /* Nonzero if the specified PC cannot be a location where functions
    have been inlined.  */
diff --git a/gdb/dummy-frame.c b/gdb/dummy-frame.c
index d3ede7c9a0c..aab8ddb337d 100644
--- a/gdb/dummy-frame.c
+++ b/gdb/dummy-frame.c
@@ -126,11 +126,9 @@  remove_dummy_frame (struct dummy_frame **dummy_ptr)
 /* Delete any breakpoint B which is a momentary breakpoint for return from
    inferior call matching DUMMY_VOIDP.  */
 
-static int
-pop_dummy_frame_bpt (struct breakpoint *b, void *dummy_voidp)
+static bool
+pop_dummy_frame_bpt (struct breakpoint *b, struct dummy_frame *dummy)
 {
-  struct dummy_frame *dummy = (struct dummy_frame *) dummy_voidp;
-
   if (b->thread == dummy->id.thread->global_num
       && b->disposition == disp_del && frame_id_eq (b->frame_id, dummy->id.id))
     {
@@ -140,11 +138,11 @@  pop_dummy_frame_bpt (struct breakpoint *b, void *dummy_voidp)
       delete_breakpoint (b);
 
       /* Stop the traversal.  */
-      return 1;
+      return true;
     }
 
   /* Continue the traversal.  */
-  return 0;
+  return false;
 }
 
 /* Pop *DUMMY_PTR, restoring program state to that before the
@@ -168,7 +166,8 @@  pop_dummy_frame (struct dummy_frame **dummy_ptr)
 
   restore_infcall_suspend_state (dummy->caller_state);
 
-  iterate_over_breakpoints (pop_dummy_frame_bpt, dummy);
+  iterate_over_breakpoints ([dummy] (breakpoint* bp)
+			    { return pop_dummy_frame_bpt (bp, dummy); });
 
   /* restore_infcall_control_state frees inf_state,
      all that remains is to pop *dummy_ptr.  */
diff --git a/gdb/guile/scm-breakpoint.c b/gdb/guile/scm-breakpoint.c
index 9a4efee92dc..b97c5022e50 100644
--- a/gdb/guile/scm-breakpoint.c
+++ b/gdb/guile/scm-breakpoint.c
@@ -505,10 +505,9 @@  gdbscm_delete_breakpoint_x (SCM self)
 
 /* iterate_over_breakpoints function for gdbscm_breakpoints.  */
 
-static int
-bpscm_build_bp_list (struct breakpoint *bp, void *arg)
+static bool
+bpscm_build_bp_list (struct breakpoint *bp, SCM *list)
 {
-  SCM *list = (SCM *) arg;
   breakpoint_smob *bp_smob = bp->scm_bp_object;
 
   /* Lazily create wrappers for breakpoints created outside Scheme.  */
@@ -548,7 +547,8 @@  gdbscm_breakpoints (void)
   /* If iterate_over_breakpoints returns non-NULL it means the iteration
      terminated early.
      In that case abandon building the list and return #f.  */
-  if (iterate_over_breakpoints (bpscm_build_bp_list, &list) != NULL)
+  if (iterate_over_breakpoints
+      ([&] (breakpoint *bp) { return bpscm_build_bp_list(bp, &list); }) != NULL)
     return SCM_BOOL_F;
 
   return scm_reverse_x (list, SCM_EOL);
diff --git a/gdb/python/py-breakpoint.c b/gdb/python/py-breakpoint.c
index 698d91e9d32..cf3311a5e1f 100644
--- a/gdb/python/py-breakpoint.c
+++ b/gdb/python/py-breakpoint.c
@@ -871,10 +871,9 @@  bppy_init (PyObject *self, PyObject *args, PyObject *kwargs)
 
 
 
-static int
-build_bp_list (struct breakpoint *b, void *arg)
+static bool
+build_bp_list (struct breakpoint *b, PyObject *list)
 {
-  PyObject *list = (PyObject *) arg;
   PyObject *bp = (PyObject *) b->py_bp_object;
   int iserr = 0;
 
@@ -906,7 +905,8 @@  gdbpy_breakpoints (PyObject *self, PyObject *args)
   /* If iterate_over_breakpoints returns non NULL it signals an error
      condition.  In that case abandon building the list and return
      NULL.  */
-  if (iterate_over_breakpoints (build_bp_list, list.get ()) != NULL)
+  if (iterate_over_breakpoints
+      ([&] (breakpoint *bp) { return build_bp_list(bp, list.get ()); }) != NULL)
     return NULL;
 
   return PyList_AsTuple (list.get ());
diff --git a/gdb/python/py-finishbreakpoint.c b/gdb/python/py-finishbreakpoint.c
index 7784a92bffb..3cbc2b10d75 100644
--- a/gdb/python/py-finishbreakpoint.c
+++ b/gdb/python/py-finishbreakpoint.c
@@ -341,10 +341,10 @@  bpfinishpy_out_of_scope (struct finish_breakpoint_object *bpfinish_obj)
 /* Callback for `bpfinishpy_detect_out_scope'.  Triggers Python's
    `B->out_of_scope' function if B is a FinishBreakpoint out of its scope.  */
 
-static int
-bpfinishpy_detect_out_scope_cb (struct breakpoint *b, void *args)
+static bool
+bpfinishpy_detect_out_scope_cb (struct breakpoint *b,
+				struct breakpoint *bp_stopped)
 {
-  struct breakpoint *bp_stopped = (struct breakpoint *) args;
   PyObject *py_bp = (PyObject *) b->py_bp_object;
 
   /* Trigger out_of_scope if this is a FinishBreakpoint and its frame is
@@ -383,8 +383,9 @@  bpfinishpy_handle_stop (struct bpstats *bs, int print_frame)
 {
   gdbpy_enter enter_py (get_current_arch (), current_language);
 
-  iterate_over_breakpoints (bpfinishpy_detect_out_scope_cb,
-                            bs == NULL ? NULL : bs->breakpoint_at);
+  iterate_over_breakpoints ([&] (breakpoint *bp) {
+			    return bpfinishpy_detect_out_scope_cb
+			      (bp, bs == NULL ? NULL : bs->breakpoint_at); });
 }
 
 /* Attached to `exit' notifications, triggers all the necessary out of
@@ -395,7 +396,9 @@  bpfinishpy_handle_exit (struct inferior *inf)
 {
   gdbpy_enter enter_py (target_gdbarch (), current_language);
 
-  iterate_over_breakpoints (bpfinishpy_detect_out_scope_cb, NULL);
+  iterate_over_breakpoints ([&] (breakpoint *bp) {
+			    return bpfinishpy_detect_out_scope_cb
+			      (bp, nullptr); });
 }
 
 /* Initialize the Python finish breakpoint code.  */
diff --git a/gdb/solib-svr4.c b/gdb/solib-svr4.c
index aa4af346b45..834596ab867 100644
--- a/gdb/solib-svr4.c
+++ b/gdb/solib-svr4.c
@@ -1991,8 +1991,8 @@  svr4_handle_solib_event (void)
 
 /* Helper function for svr4_update_solib_event_breakpoints.  */
 
-static int
-svr4_update_solib_event_breakpoint (struct breakpoint *b, void *arg)
+static bool
+svr4_update_solib_event_breakpoint (struct breakpoint *b)
 {
   struct bp_location *loc;
 
@@ -2036,7 +2036,7 @@  svr4_update_solib_event_breakpoint (struct breakpoint *b, void *arg)
 static void
 svr4_update_solib_event_breakpoints (void)
 {
-  iterate_over_breakpoints (svr4_update_solib_event_breakpoint, NULL);
+  iterate_over_breakpoints (svr4_update_solib_event_breakpoint);
 }
 
 /* Create and register solib event breakpoints.  PROBES is an array