Convert probes to type-safe registry API

This changes the probes code in elfread.c to use the type-safe
registry API.  While doing this, I saw that the caller of get_probes
owns the probes, so I went through the code and changed the vectors to
store unique_ptrs, making the ownership relationship more clear.

gdb/ChangeLog
2019-05-08  Tom Tromey  <tom@tromey.com>

	* symfile.h (struct sym_probe_fns) <sym_get_probes>: Change type.
	* symfile-debug.c (debug_sym_get_probes): Change type.
	* stap-probe.c (handle_stap_probe):
	(stap_static_probe_ops::get_probes): Change type.
	* probe.h (class static_probe_ops) <get_probes>: Change type.
	* probe.c (class any_static_probe_ops) <get_probes>: Change type.
	(parse_probes_in_pspace): Update.
	(find_probes_in_objfile, find_probe_by_pc, collect_probes):
	Update.
	(any_static_probe_ops::get_probes): Change type.
	* elfread.c (elfread_data): New typedef.
	(probe_key): Change type.
	(elf_get_probes): Likewise.  Update.
	(probe_key_free): Remove.
	(_initialize_elfread): Update.
	* dtrace-probe.c (class dtrace_static_probe_ops) <get_probes>:
	Change type.
	(dtrace_process_dof_probe, dtrace_process_dof)
	(dtrace_static_probe_ops::get_probe): Change type.

1 files changed, 14 insertions, 14 deletions

diff --git a/gdb/probe.c b/gdb/probe.c
index b9337a9..7bc75d8 100644
--- a/gdb/probe.c
+++ b/gdb/probe.c
@@ -47,7 +47,7 @@ public:
   bool is_linespec (const char **linespecp) const override;
 
   /* See probe.h.  */
-  void get_probes (std::vector<probe *> *probesp,
+  void get_probes (std::vector<std::unique_ptr<probe>> *probesp,
 		   struct objfile *objfile) const override;
 
   /* See probe.h.  */
@@ -84,10 +84,10 @@ parse_probes_in_pspace (const static_probe_ops *spops,
 			   objfile_namestr) != 0)
 	continue;
 
-      const std::vector<probe *> &probes
+      const std::vector<std::unique_ptr<probe>> &probes
 	= objfile->sf->sym_probe_fns->sym_get_probes (objfile);
 
-      for (probe *p : probes)
+      for (auto &p : probes)
 	{
 	  if (spops != &any_static_probe_ops && p->get_static_ops () != spops)
 	    continue;
@@ -103,7 +103,7 @@ parse_probes_in_pspace (const static_probe_ops *spops,
 	  sal.explicit_pc = 1;
 	  sal.section = find_pc_overlay (sal.pc);
 	  sal.pspace = search_pspace;
-	  sal.prob = p;
+	  sal.prob = p.get ();
 	  sal.objfile = objfile;
 
 	  result->push_back (std::move (sal));
@@ -223,9 +223,9 @@ find_probes_in_objfile (struct objfile *objfile, const char *provider,
   if (!objfile->sf || !objfile->sf->sym_probe_fns)
     return result;
 
-  const std::vector<probe *> &probes
+  const std::vector<std::unique_ptr<probe>> &probes
     = objfile->sf->sym_probe_fns->sym_get_probes (objfile);
-  for (probe *p : probes)
+  for (auto &p : probes)
     {
       if (p->get_provider () != provider)
 	continue;
@@ -233,7 +233,7 @@ find_probes_in_objfile (struct objfile *objfile, const char *provider,
       if (p->get_name () != name)
 	continue;
 
-      result.push_back (p);
+      result.push_back (p.get ());
     }
 
   return result;
@@ -256,13 +256,13 @@ find_probe_by_pc (CORE_ADDR pc)
 	continue;
 
       /* If this proves too inefficient, we can replace with a hash.  */
-      const std::vector<probe *> &probes
+      const std::vector<std::unique_ptr<probe>> &probes
 	= objfile->sf->sym_probe_fns->sym_get_probes (objfile);
-      for (probe *p : probes)
+      for (auto &p : probes)
 	if (p->get_relocated_address (objfile) == pc)
 	  {
 	    result.objfile = objfile;
-	    result.prob = p;
+	    result.prob = p.get ();
 	    return result;
 	  }
     }
@@ -305,10 +305,10 @@ collect_probes (const std::string &objname, const std::string &provider,
 	    continue;
 	}
 
-      const std::vector<probe *> &probes
+      const std::vector<std::unique_ptr<probe>> &probes
 	= objfile->sf->sym_probe_fns->sym_get_probes (objfile);
 
-      for (probe *p : probes)
+      for (auto &p : probes)
 	{
 	  if (spops != &any_static_probe_ops && p->get_static_ops () != spops)
 	    continue;
@@ -321,7 +321,7 @@ collect_probes (const std::string &objname, const std::string &provider,
 	      && probe_pat->exec (p->get_name ().c_str (), 0, NULL, 0) != 0)
 	    continue;
 
-	  result.emplace_back (p, objfile);
+	  result.emplace_back (p.get (), objfile);
 	}
     }
 
@@ -750,7 +750,7 @@ any_static_probe_ops::is_linespec (const char **linespecp) const
 /* Implementation of 'get_probes' method.  */
 
 void
-any_static_probe_ops::get_probes (std::vector<probe *> *probesp,
+any_static_probe_ops::get_probes (std::vector<std::unique_ptr<probe>> *probesp,
 				  struct objfile *objfile) const
 {
   /* No probes can be provided by this dummy backend.  */