gdb: Implement native dumpcore function

Add new API for systems with native kernel support for dumping
a process on demand. Wire it into the gdb's gcore functionality.

gdb/ChangeLog:

       * target.h (supports_dumpcore, dumpcore): New
       function declarations.
       * target.c (supports_dumpcore, dumpcore): New
       functions.
       * target-delegates.c: Rebuild.
       * gcore.c (gcore_command): Use target_supports_dumpcore ()
       and target_dumpcore ().

1 files changed, 18 insertions, 0 deletions

diff --git a/gdb/target.h b/gdb/target.h
index 4e8d4cc..71d575f 100644
--- a/gdb/target.h
+++ b/gdb/target.h
@@ -881,6 +881,14 @@ struct target_ops
     virtual bool supports_evaluation_of_breakpoint_conditions ()
       TARGET_DEFAULT_RETURN (false);
 
+    /* Does this target support native dumpcore API?  */
+    virtual bool supports_dumpcore ()
+      TARGET_DEFAULT_RETURN (false);
+
+    /* Generate the core file with native target API.  */
+    virtual void dumpcore (const char *filename)
+      TARGET_DEFAULT_IGNORE ();
+
     /* Does this target support evaluation of breakpoint commands on its
        end?  */
     virtual bool can_run_breakpoint_commands ()
@@ -1499,6 +1507,16 @@ int target_supports_disable_randomization (void);
 #define target_supports_evaluation_of_breakpoint_conditions() \
   (current_top_target ()->supports_evaluation_of_breakpoint_conditions) ()
 
+/* Does this target support dumpcore API?  */
+
+#define target_supports_dumpcore() \
+  (current_top_target ()->supports_dumpcore) ()
+
+/* Generate the core file with target API.  */
+
+#define target_dumpcore(x) \
+  (current_top_target ()->dumpcore (x))
+
 /* Returns true if this target can handle breakpoint commands
    on its end.  */