opts.c (common_handle_option): Handle new option -fdbg-cnt-list.

2007-06-12  Seongbae Park  <seongbae.park@gmail.com>

	* opts.c (common_handle_option): Handle new option -fdbg-cnt-list.
	* dbgcnt.c (dbg_cnt_set_limit_by_name): Return value
	to indicate an error.
	(dbg_cnt_process_single_pair, dbg_cnt_list_all_counters): New functions
	(dbg_cnt_process_opt): Print an error on a bad argument.
	* dbgcnt.h (dbg_cnt_list_all_counters): New function declaration.
	* common.opt (-fdbg-cnt-list): New.
	* doc/invoke.texi (-fdbg-cnt-list,-fdbg-cnt=): New.

From-SVN: r125657

gcc/ChangeLog

@@ -1,3 +1,14 @@
+2007-06-12  Seongbae Park  <seongbae.park@gmail.com>
+
+	* opts.c (common_handle_option): Handle new option -fdbg-cnt-list.
+	* dbgcnt.c (dbg_cnt_set_limit_by_name): Return value
+	to indicate an error.
+	(dbg_cnt_process_single_pair, dbg_cnt_list_all_counters): New functions
+	(dbg_cnt_process_opt): Print an error on a bad argument.
+	* dbgcnt.h (dbg_cnt_list_all_counters): New function declaration.
+	* common.opt (-fdbg-cnt-list): New.
+	* doc/invoke.texi (-fdbg-cnt-list,-fdbg-cnt=): New.
+
 2007-06-12  Eric Botcazou  <ebotcazou@adacore.com>
 
 	* tree-ssa-alias.c (finalize_ref_all_pointers): Clear pt_anything

gcc/common.opt

@@ -392,9 +392,13 @@ fdata-sections
 Common Report Var(flag_data_sections) Optimization
 Place data items into their own section
 
+fdbg-cnt-list
+Common Report
+List all available debugging counters with their limits and counts.
+
 fdbg-cnt=
 Common RejectNegative Joined
--fdbg-cnt=<counter>:<limit>             Set the debug counter limit.   
+-fdbg-cnt=<counter>:<limit>[,<counter>:<limit>,...]    Set the debug counter limit.   
 
 ; Nonzero for -fdefer-pop: don't pop args after each function call
 ; instead save them up to pop many calls' args with one insns.

gcc/dbgcnt.c

@@ -23,6 +23,7 @@ See dbgcnt.def for usage information.  */
 #include "config.h"
 #include "system.h"
 #include "coretypes.h"
+#include "errors.h"
 
 #include "dbgcnt.h"
 
@@ -70,7 +71,7 @@ dbg_cnt_set_limit_by_index (enum debug_counter index, int value)
   fprintf (stderr, "dbg_cnt '%s' set to %d\n", map[index].name, value);
 }
 
-static void
+static bool
 dbg_cnt_set_limit_by_name (const char *name, int len, int value)
 {
   int i;
@@ -79,29 +80,66 @@ dbg_cnt_set_limit_by_name (const char *name, int len, int value)
       break;
 
   if (i < 0)
-    return;
+    return false;
 
   dbg_cnt_set_limit_by_index (i, value);
+  return true;
+}
+
+
+/* Process a single "name:value" pair.
+   Returns NULL if there's no valid pair is found.
+   Otherwise returns a pointer to the end of the pair. */
+
+static const char *
+dbg_cnt_process_single_pair (const char *arg)
+{
+   char *colon = strchr (arg, ':');
+   char *endptr = NULL;
+   int value;
+   
+   if (colon == NULL)
+     return NULL;
+
+   value = strtol (colon + 1, &endptr, 10);
+
+   if (endptr != NULL && endptr != colon + 1
+       && dbg_cnt_set_limit_by_name (arg, colon - arg, value))
+     return endptr;
+   
+   return NULL;
 }
 
 void
 dbg_cnt_process_opt (const char *arg)
 {
-   char *colon = strchr (arg, ':');
-   char *comma;
-   
-   if (colon == NULL)
-     return;
+   const char *start = arg;
+   const char *next;
+   do {
+     next = dbg_cnt_process_single_pair (arg);
+     if (next == NULL)
+       break;
+   } while (*next == ',' && (arg = next + 1));
 
-   dbg_cnt_set_limit_by_name (arg, colon - arg, atoi (colon + 1));
-
-   comma = strchr (colon + 1, ',');
-   while (comma)
+   if (next == NULL || *next != 0)
      {
-       colon = strchr (comma + 1, ':');
-       if (colon == NULL || !(colon[1] >= '0' && colon[1] <= '9'))
-         return;
-       dbg_cnt_set_limit_by_name (comma + 1, colon - (comma + 1), atoi (colon + 1));
-       comma = strchr (colon + 1, ',');
+       char *buffer = alloca (arg - start + 2);
+       sprintf (buffer, "%*c", (int)(1 + (arg - start)), '^');
+       error ("Can not find a valid counter:value pair:");
+       error ("-fdbg-cnt=%s", start);
+       error ("          %s", buffer);
      }
 }
+
+/* Print name, limit and count of all counters.   */
+
+void dbg_cnt_list_all_counters (void)
+{
+  int i;
+  printf ("  %-30s %-5s %-5s\n", "counter name",  "limit", "value");
+  printf ("----------------------------------------------\n");
+  for (i = 0; i < debug_counter_number_of_counters; i++)
+    printf ("  %-30s %5d %5u\n",
+            map[i].name, limit[map[i].counter], count[map[i].counter]);
+  printf ("\n");
+}

gcc/dbgcnt.h

@@ -35,5 +35,6 @@ enum debug_counter {
 extern bool dbg_cnt_is_enabled (enum debug_counter index);
 extern bool dbg_cnt (enum debug_counter index);
 extern void dbg_cnt_process_opt (const char *arg);
+extern void dbg_cnt_list_all_counters (void);
 
 #endif /* GCC_DBGCNT_H */

gcc/doc/invoke.texi

@@ -269,6 +269,7 @@ Objective-C and Objective-C++ Dialects}.
 @item Debugging Options
 @xref{Debugging Options,,Options for Debugging Your Program or GCC}.
 @gccoptlist{-d@var{letters}  -dumpspecs  -dumpmachine  -dumpversion @gol
+-fdbg-cnt-list -fdbg-cnt=@var{counter-value-list} @gol
 -fdump-noaddr -fdump-unnumbered  -fdump-translation-unit@r{[}-@var{n}@r{]} @gol
 -fdump-class-hierarchy@r{[}-@var{n}@r{]} @gol
 -fdump-ipa-all -fdump-ipa-cgraph @gol
@@ -4211,6 +4212,21 @@ above for a description of @var{auxname} and instructions on how to
 generate test coverage data.  Coverage data will match the source files
 more closely, if you do not optimize.
 
+@item -fdbg-cnt-list
+@opindex fdbg-cnt-list
+Print the name and the counter upperbound for all debug counters.
+
+@item -fdbg-cnt=@var{counter-value-list}
+@opindex fdbg-cnt
+Set the internal debug counter upperbound. @var{counter-value-list} 
+is a comma-separated list of @var{name}:@var{value} pairs
+which sets the upperbound of each debug counter @var{name} to @var{value}.
+All debug counters have the initial upperbound of @var{UINT_MAX},
+thus dbg_cnt() returns true always unless the upperbound is set by this option.
+e.g. With -fdbg-cnt=dce:10,tail_call:0
+dbg_cnt(dce) will return true only for first 10 invocations
+and dbg_cnt(tail_call) will return false always.
+
 @item -d@var{letters}
 @item -fdump-rtl-@var{pass}
 @opindex d

gcc/opts.c

@@ -1434,6 +1434,10 @@ common_handle_option (size_t scode, const char *arg, int value,
       dbg_cnt_process_opt (arg);
       break;
 
+    case OPT_fdbg_cnt_list:
+      dbg_cnt_list_all_counters ();
+      break;
+
     case OPT_fdiagnostics_show_location_:
       if (!strcmp (arg, "once"))
 	diagnostic_prefixing_rule (global_dc) = DIAGNOSTICS_SHOW_PREFIX_ONCE;