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* [gcc r13-3633] analyzer: use std::unique_ptr for checker_event
@ 2022-11-03 17:48 David Malcolm
  0 siblings, 0 replies; only message in thread
From: David Malcolm @ 2022-11-03 17:48 UTC (permalink / raw)
  To: gcc-cvs

https://gcc.gnu.org/g:d60b40b86b166fbdb68523c4164c0003c8244192

commit r13-3633-gd60b40b86b166fbdb68523c4164c0003c8244192
Author: David Malcolm <dmalcolm@redhat.com>
Date:   Thu Nov 3 13:47:02 2022 -0400

    analyzer: use std::unique_ptr for checker_event
    
    gcc/analyzer/ChangeLog:
            * call-info.cc: Use std::unique_ptr for checker_event.
            * checker-path.cc: Likewise.
            * checker-path.h: Likewise.
            * diagnostic-manager.cc: Likewise.
            * engine.cc: Likewise.
            * pending-diagnostic.cc: Likewise.
            * sm-signal.cc: Likewise.
            * varargs.cc: Likewise.
    
    Signed-off-by: David Malcolm <dmalcolm@redhat.com>

Diff:
---
 gcc/analyzer/call-info.cc          |   9 ++-
 gcc/analyzer/checker-path.cc       |  25 ++++---
 gcc/analyzer/checker-path.h        |   4 +-
 gcc/analyzer/diagnostic-manager.cc | 146 +++++++++++++++++++------------------
 gcc/analyzer/engine.cc             |  40 +++++-----
 gcc/analyzer/pending-diagnostic.cc |  13 ++--
 gcc/analyzer/sm-signal.cc          |   2 +-
 gcc/analyzer/varargs.cc            |  14 ++--
 8 files changed, 133 insertions(+), 120 deletions(-)

diff --git a/gcc/analyzer/call-info.cc b/gcc/analyzer/call-info.cc
index 3572e06d14b..ffdab73b165 100644
--- a/gcc/analyzer/call-info.cc
+++ b/gcc/analyzer/call-info.cc
@@ -55,6 +55,7 @@ along with GCC; see the file COPYING3.  If not see
 #include "analyzer/diagnostic-manager.h"
 #include "analyzer/exploded-graph.h"
 #include "analyzer/call-info.h"
+#include "make-unique.h"
 
 #if ENABLE_ANALYZER
 
@@ -113,10 +114,10 @@ call_info::add_events_to_path (checker_path *emission_path,
   tree caller_fndecl = src_point.get_fndecl ();
   const int stack_depth = src_point.get_stack_depth ();
 
-  emission_path->add_event (new call_event (get_call_stmt ()->location,
-					    caller_fndecl,
-					    stack_depth,
-					    this));
+  emission_path->add_event (make_unique<call_event> (get_call_stmt ()->location,
+						     caller_fndecl,
+						     stack_depth,
+						     this));
 }
 
 /* Recreate a call_details instance from this call_info.  */
diff --git a/gcc/analyzer/checker-path.cc b/gcc/analyzer/checker-path.cc
index 49940ce839e..40f9ccfe08f 100644
--- a/gcc/analyzer/checker-path.cc
+++ b/gcc/analyzer/checker-path.cc
@@ -56,6 +56,7 @@ along with GCC; see the file COPYING3.  If not see
 #include "analyzer/diagnostic-manager.h"
 #include "analyzer/checker-path.h"
 #include "analyzer/exploded-graph.h"
+#include "make-unique.h"
 
 #if ENABLE_ANALYZER
 
@@ -1262,16 +1263,16 @@ checker_path::add_region_creation_events (const region *reg,
     if (const svalue *capacity_sval = model->get_capacity (reg))
       capacity = model->get_representative_tree (capacity_sval);
 
-  add_event (new region_creation_event (reg, capacity, RCE_MEM_SPACE,
-					loc, fndecl, depth));
+  add_event (make_unique<region_creation_event> (reg, capacity, RCE_MEM_SPACE,
+						 loc, fndecl, depth));
 
   if (capacity)
-    add_event (new region_creation_event (reg, capacity, RCE_CAPACITY,
-					  loc, fndecl, depth));
+    add_event (make_unique<region_creation_event> (reg, capacity, RCE_CAPACITY,
+						   loc, fndecl, depth));
 
   if (debug)
-    add_event (new region_creation_event (reg, capacity, RCE_DEBUG,
-					  loc, fndecl, depth));
+    add_event (make_unique<region_creation_event> (reg, capacity, RCE_DEBUG,
+						   loc, fndecl, depth));
 }
 
 /* Add a warning_event to the end of this path.  */
@@ -1281,12 +1282,12 @@ checker_path::add_final_event (const state_machine *sm,
 			       const exploded_node *enode, const gimple *stmt,
 			       tree var, state_machine::state_t state)
 {
-  checker_event *end_of_path
-    = new warning_event (get_stmt_location (stmt, enode->get_function ()),
-			 enode->get_function ()->decl,
-			 enode->get_stack_depth (),
-			 sm, var, state);
-  add_event (end_of_path);
+  add_event
+    (make_unique<warning_event> (get_stmt_location (stmt,
+						    enode->get_function ()),
+				 enode->get_function ()->decl,
+				 enode->get_stack_depth (),
+				 sm, var, state));
 }
 
 void
diff --git a/gcc/analyzer/checker-path.h b/gcc/analyzer/checker-path.h
index 5d009340189..c8de5c9be2c 100644
--- a/gcc/analyzer/checker-path.h
+++ b/gcc/analyzer/checker-path.h
@@ -631,9 +631,9 @@ public:
 
   void maybe_log (logger *logger, const char *desc) const;
 
-  void add_event (checker_event *event)
+  void add_event (std::unique_ptr<checker_event> event)
   {
-    m_events.safe_push (event);
+    m_events.safe_push (event.release ());
   }
 
   void delete_event (int idx)
diff --git a/gcc/analyzer/diagnostic-manager.cc b/gcc/analyzer/diagnostic-manager.cc
index 0a8a2e8df8c..e77547567c1 100644
--- a/gcc/analyzer/diagnostic-manager.cc
+++ b/gcc/analyzer/diagnostic-manager.cc
@@ -1559,15 +1559,16 @@ public:
 
     int stack_depth = src_stack_depth;
 
-    m_emission_path->add_event (new state_change_event (supernode,
-							stmt,
-							stack_depth,
-							sm,
-							NULL,
-							src_sm_val,
-							dst_sm_val,
-							NULL,
-							dst_state));
+    m_emission_path->add_event
+      (make_unique<state_change_event> (supernode,
+					stmt,
+					stack_depth,
+					sm,
+					NULL,
+					src_sm_val,
+					dst_sm_val,
+					NULL,
+					dst_state));
     return false;
   }
 
@@ -1602,15 +1603,16 @@ public:
     if (!stmt)
       return false;
 
-    m_emission_path->add_event (new state_change_event (supernode,
-							stmt,
-							stack_depth,
-							sm,
-							sval,
-							src_sm_val,
-							dst_sm_val,
-							dst_origin_sval,
-							dst_state));
+    m_emission_path->add_event
+      (make_unique<state_change_event> (supernode,
+					stmt,
+					stack_depth,
+					sm,
+					sval,
+					src_sm_val,
+					dst_sm_val,
+					dst_origin_sval,
+					dst_state));
     return false;
   }
 
@@ -1743,14 +1745,15 @@ struct null_assignment_sm_context : public sm_context
     const supernode *supernode = m_point->get_supernode ();
     int stack_depth = m_point->get_stack_depth ();
 
-    m_emission_path->add_event (new state_change_event (supernode,
-							m_stmt,
-							stack_depth,
-							m_sm,
-							var_new_sval,
-							from, to,
-							NULL,
-							*m_new_state));
+    m_emission_path->add_event
+      (make_unique<state_change_event> (supernode,
+					m_stmt,
+					stack_depth,
+					m_sm,
+					var_new_sval,
+					from, to,
+					NULL,
+					*m_new_state));
   }
 
   void set_next_state (const gimple *stmt,
@@ -1765,14 +1768,15 @@ struct null_assignment_sm_context : public sm_context
     const supernode *supernode = m_point->get_supernode ();
     int stack_depth = m_point->get_stack_depth ();
 
-    m_emission_path->add_event (new state_change_event (supernode,
-							m_stmt,
-							stack_depth,
-							m_sm,
-							sval,
-							from, to,
-							NULL,
-							*m_new_state));
+    m_emission_path->add_event
+      (make_unique<state_change_event> (supernode,
+					m_stmt,
+					stack_depth,
+					m_sm,
+					sval,
+					from, to,
+					NULL,
+					*m_new_state));
   }
 
   void warn (const supernode *, const gimple *,
@@ -1907,7 +1911,7 @@ diagnostic_manager::add_events_for_eedge (const path_builder &pb,
       if (dst_point.get_supernode ()->entry_p ())
 	{
 	  emission_path->add_event
-	    (new function_entry_event
+	    (make_unique<function_entry_event>
 	     (dst_point.get_supernode ()->get_start_location (),
 	      dst_point.get_fndecl (),
 	      dst_stack_depth));
@@ -1943,16 +1947,16 @@ diagnostic_manager::add_events_for_eedge (const path_builder &pb,
 	const gcall *call = dyn_cast <const gcall *> (stmt);
 	if (call && is_setjmp_call_p (call))
 	  emission_path->add_event
-	    (new setjmp_event (stmt->location,
-			       dst_node,
-			       dst_point.get_fndecl (),
-			       dst_stack_depth,
-			       call));
+	    (make_unique<setjmp_event> (stmt->location,
+					dst_node,
+					dst_point.get_fndecl (),
+					dst_stack_depth,
+					call));
 	else
 	  emission_path->add_event
-	    (new statement_event (stmt,
-				  dst_point.get_fndecl (),
-				  dst_stack_depth, dst_state));
+	    (make_unique<statement_event> (stmt,
+					   dst_point.get_fndecl (),
+					   dst_stack_depth, dst_state));
 
 	/* Create state change events for assignment to NULL.
 	   Iterate through the stmts in dst_enode, adding state change
@@ -2042,11 +2046,12 @@ diagnostic_manager::add_events_for_eedge (const path_builder &pb,
 		 "this path would have been rejected as infeasible"
 		 " at this edge: ");
       pb.get_feasibility_problem ()->dump_to_pp (&pp);
-      emission_path->add_event (new precanned_custom_event
-				(dst_point.get_location (),
-				 dst_point.get_fndecl (),
-				 dst_stack_depth,
-				 pp_formatted_text (&pp)));
+      emission_path->add_event
+	(make_unique<precanned_custom_event>
+	 (dst_point.get_location (),
+	  dst_point.get_fndecl (),
+	  dst_stack_depth,
+	  pp_formatted_text (&pp)));
     }
 }
 
@@ -2157,17 +2162,18 @@ diagnostic_manager::add_events_for_superedge (const path_builder &pb,
     case SUPEREDGE_CFG_EDGE:
       {
 	emission_path->add_event
-	  (new start_cfg_edge_event (eedge,
-			       (last_stmt
-				? last_stmt->location
-				: UNKNOWN_LOCATION),
-			       src_point.get_fndecl (),
-			       src_stack_depth));
+	  (make_unique<start_cfg_edge_event> (eedge,
+					      (last_stmt
+					       ? last_stmt->location
+					       : UNKNOWN_LOCATION),
+					      src_point.get_fndecl (),
+					      src_stack_depth));
 	emission_path->add_event
-	  (new end_cfg_edge_event (eedge,
-				   dst_point.get_supernode ()->get_start_location (),
-				   dst_point.get_fndecl (),
-				   dst_stack_depth));
+	  (make_unique<end_cfg_edge_event>
+	    (eedge,
+	     dst_point.get_supernode ()->get_start_location (),
+	     dst_point.get_fndecl (),
+	     dst_stack_depth));
       }
       break;
 
@@ -2180,12 +2186,12 @@ diagnostic_manager::add_events_for_superedge (const path_builder &pb,
 	/* TODO: add a subclass for this, or generate events for the
 	   summary.  */
 	emission_path->add_event
-	  (new debug_event ((last_stmt
-			     ? last_stmt->location
-			     : UNKNOWN_LOCATION),
-			    src_point.get_fndecl (),
-			    src_stack_depth,
-			    "call summary"));
+	  (make_unique<debug_event> ((last_stmt
+				      ? last_stmt->location
+				      : UNKNOWN_LOCATION),
+				     src_point.get_fndecl (),
+				     src_stack_depth,
+				     "call summary"));
       }
       break;
 
@@ -2196,12 +2202,12 @@ diagnostic_manager::add_events_for_superedge (const path_builder &pb,
 
 	const gcall *call_stmt = return_edge->get_call_stmt ();
 	emission_path->add_event
-	  (new return_event (eedge,
-			     (call_stmt
-			      ? call_stmt->location
-			      : UNKNOWN_LOCATION),
-			     dst_point.get_fndecl (),
-			     dst_stack_depth));
+	  (make_unique<return_event> (eedge,
+				      (call_stmt
+				       ? call_stmt->location
+				       : UNKNOWN_LOCATION),
+				      dst_point.get_fndecl (),
+				      dst_stack_depth));
       }
       break;
     }
diff --git a/gcc/analyzer/engine.cc b/gcc/analyzer/engine.cc
index a727553028b..59a4e6f6097 100644
--- a/gcc/analyzer/engine.cc
+++ b/gcc/analyzer/engine.cc
@@ -1772,7 +1772,8 @@ public:
 	   src_point.get_fndecl (),
 	   src_stack_depth,
 	   "stack frame is popped here, invalidating saved environment");
-	emission_path->add_event (m_stack_pop_event);
+	emission_path->add_event
+	  (std::unique_ptr<custom_event> (m_stack_pop_event));
 	return false;
       }
     return false;
@@ -2015,19 +2016,21 @@ dynamic_call_info_t::add_events_to_path (checker_path *emission_path,
   const int dest_stack_depth = dest_point.get_stack_depth ();
 
   if (m_is_returning_call)
-    emission_path->add_event (new return_event (eedge,
-						(m_dynamic_call
-						 ? m_dynamic_call->location
-						 : UNKNOWN_LOCATION),
-						dest_point.get_fndecl (),
-						dest_stack_depth));
+    emission_path->add_event
+      (make_unique<return_event> (eedge,
+				  (m_dynamic_call
+				   ? m_dynamic_call->location
+				   : UNKNOWN_LOCATION),
+				  dest_point.get_fndecl (),
+				  dest_stack_depth));
   else
-    emission_path->add_event (new call_event (eedge,
-					      (m_dynamic_call
-					       ? m_dynamic_call->location
-					       : UNKNOWN_LOCATION),
-					      src_point.get_fndecl (),
-					      src_stack_depth));
+    emission_path->add_event
+      (make_unique<call_event> (eedge,
+				(m_dynamic_call
+				 ? m_dynamic_call->location
+				 : UNKNOWN_LOCATION),
+				src_point.get_fndecl (),
+				src_stack_depth));
 }
 
 /* class rewind_info_t : public custom_edge_info.  */
@@ -2072,12 +2075,12 @@ rewind_info_t::add_events_to_path (checker_path *emission_path,
   const int dst_stack_depth = dst_point.get_stack_depth ();
 
   emission_path->add_event
-    (new rewind_from_longjmp_event
+    (make_unique<rewind_from_longjmp_event>
      (&eedge, get_longjmp_call ()->location,
       src_point.get_fndecl (),
       src_stack_depth, this));
   emission_path->add_event
-    (new rewind_to_setjmp_event
+    (make_unique<rewind_to_setjmp_event>
      (&eedge, get_setjmp_call ()->location,
       dst_point.get_fndecl (),
       dst_stack_depth, this));
@@ -2666,7 +2669,7 @@ public:
 			   const exploded_edge &) const final override
   {
     emission_path->add_event
-      (new tainted_args_function_custom_event
+      (make_unique<tainted_args_function_custom_event>
        (DECL_SOURCE_LOCATION (m_fndecl), m_fndecl, 0));
   }
 
@@ -3111,14 +3114,15 @@ public:
     /* Show the field in the struct declaration, e.g.
        "(1) field 'store' is marked with '__attribute__((tainted_args))'"  */
     emission_path->add_event
-      (new tainted_args_field_custom_event (m_field));
+      (make_unique<tainted_args_field_custom_event> (m_field));
 
     /* Show the callback in the initializer
        e.g.
        "(2) function 'gadget_dev_desc_UDC_store' used as initializer
        for field 'store' marked with '__attribute__((tainted_args))'".  */
     emission_path->add_event
-      (new tainted_args_callback_custom_event (m_loc, m_fndecl, 0, m_field));
+      (make_unique<tainted_args_callback_custom_event> (m_loc, m_fndecl,
+							0, m_field));
   }
 
 private:
diff --git a/gcc/analyzer/pending-diagnostic.cc b/gcc/analyzer/pending-diagnostic.cc
index a21c86f37b5..fdbe6153f2c 100644
--- a/gcc/analyzer/pending-diagnostic.cc
+++ b/gcc/analyzer/pending-diagnostic.cc
@@ -50,6 +50,7 @@ along with GCC; see the file COPYING3.  If not see
 #include "analyzer/exploded-graph.h"
 #include "diagnostic-path.h"
 #include "analyzer/checker-path.h"
+#include "make-unique.h"
 
 #if ENABLE_ANALYZER
 
@@ -178,12 +179,12 @@ pending_diagnostic::add_call_event (const exploded_edge &eedge,
   const int src_stack_depth = src_point.get_stack_depth ();
   const gimple *last_stmt = src_point.get_supernode ()->get_last_stmt ();
   emission_path->add_event
-    (new call_event (eedge,
-		     (last_stmt
-		      ? last_stmt->location
-		      : UNKNOWN_LOCATION),
-		     src_point.get_fndecl (),
-		     src_stack_depth));
+    (make_unique<call_event> (eedge,
+			      (last_stmt
+			       ? last_stmt->location
+			       : UNKNOWN_LOCATION),
+			      src_point.get_fndecl (),
+			      src_stack_depth));
 }
 
 } // namespace ana
diff --git a/gcc/analyzer/sm-signal.cc b/gcc/analyzer/sm-signal.cc
index 08476b63df0..87e21a41715 100644
--- a/gcc/analyzer/sm-signal.cc
+++ b/gcc/analyzer/sm-signal.cc
@@ -234,7 +234,7 @@ public:
     const final override
   {
     emission_path->add_event
-      (new precanned_custom_event
+      (make_unique<precanned_custom_event>
        (UNKNOWN_LOCATION, NULL_TREE, 0,
 	"later on,"
 	" when the signal is delivered to the process"));
diff --git a/gcc/analyzer/varargs.cc b/gcc/analyzer/varargs.cc
index 8b1d8091e17..f7d4838ecb1 100644
--- a/gcc/analyzer/varargs.cc
+++ b/gcc/analyzer/varargs.cc
@@ -788,13 +788,13 @@ public:
 	  = get_num_variadic_arguments (dst_node->get_function ()->decl,
 					call_stmt);
 	emission_path->add_event
-	  (new va_arg_call_event (eedge,
-				  (last_stmt
-				   ? last_stmt->location
-				   : UNKNOWN_LOCATION),
-				  src_point.get_fndecl (),
-				  src_stack_depth,
-				  num_variadic_arguments));
+	  (make_unique<va_arg_call_event> (eedge,
+					   (last_stmt
+					    ? last_stmt->location
+					    : UNKNOWN_LOCATION),
+					   src_point.get_fndecl (),
+					   src_stack_depth,
+					   num_variadic_arguments));
       }
     else
       pending_diagnostic::add_call_event (eedge, emission_path);

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