Adding memory leak bucket for cpp

Reviewed By: @cristianoc

Differential Revision: D2540503

fb-gh-sync-id: 4324009

infer/bin/inferlib.py

@@ -149,12 +149,12 @@ infer_group.add_argument('--absolute-paths',
                           default=False,
                           help='Report errors with absolute paths')
 
-infer_group.add_argument('--objc_ml_buckets',
-                           dest='objc_ml_buckets',
+infer_group.add_argument('--ml_buckets',
+                         dest='ml_buckets',
                          help='memory leak buckets to be checked, '
                               'separated by commas. The possible '
                               'buckets are cf (Core Foundation), '
-                                'arc, narc (No arc)')
+                              'arc, narc (No arc), cpp')
 
 infer_group.add_argument('-nt', '--notest', action='store_true',
                            dest='notest',
@@ -503,8 +503,8 @@ class Infer:
         if self.args.infer_cache:
             infer_options += ['-infer_cache', self.args.infer_cache]
 
-        if self.args.objc_ml_buckets:
-            infer_options += ['-objc_ml_buckets', self.args.objc_ml_buckets]
+        if self.args.ml_buckets:
+            infer_options += ['-ml_buckets', self.args.ml_buckets]
 
         if self.args.notest:
             infer_options += ['-notest']

infer/src/backend/abs.ml

@@ -1129,7 +1129,7 @@ let should_raise_objc_leak prop hpred =
   match hpred with
   | Sil.Hpointsto(e, Sil.Estruct((fn, Sil.Eexp( (Sil.Const (Sil.Cint i)), _)):: _, _), Sil.Sizeof (typ, _))
     when Ident.fieldname_is_hidden fn && Sil.Int.gt i Sil.Int.zero (* counter > 0 *) ->
-      Mleak_buckets.should_raise_leak typ
+      Mleak_buckets.should_raise_objc_leak typ
   | _ -> None
 
 let print_retain_cycle _prop =
@@ -1293,9 +1293,11 @@ let check_junk ?original_prop pname tenv prop =
               let resource = match Errdesc.hpred_is_open_resource prop hpred with
                 | Some res -> res
                 | None -> Sil.Rmemory Sil.Mmalloc in
-              let objc_ml_bucket_opt =
+              let ml_bucket_opt =
                 match resource with
                 | Sil.Rmemory Sil.Mobjc -> should_raise_objc_leak prop hpred
+                | Sil.Rmemory Sil.Mnew when !Config.curr_language = Config.C_CPP ->
+                    Mleak_buckets.should_raise_cpp_leak ()
                 | _ -> None in
               let exn_retain_cycle cycle =
                 print_retain_cycle original_prop;
@@ -1306,7 +1308,7 @@ let check_junk ?original_prop pname tenv prop =
                    try assert false with Assert_failure x -> x) in
               let exn_leak = Exceptions.Leak
                   (fp_part, prop, hpred,
-                   Errdesc.explain_leak tenv hpred prop alloc_attribute objc_ml_bucket_opt,
+                   Errdesc.explain_leak tenv hpred prop alloc_attribute ml_bucket_opt,
                    !Absarray.array_abstraction_performed,
                    resource,
                    try assert false with Assert_failure x -> x) in
@@ -1320,8 +1322,9 @@ let check_junk ?original_prop pname tenv prop =
                      if cycle_has_weak_or_unretained_or_assign_field cycle then
                        true, exn_retain_cycle cycle
                      else false, exn_retain_cycle cycle
-                 | Some _, Sil.Rmemory Sil.Mobjc ->
-                     objc_ml_bucket_opt = None, exn_leak
+                 | Some _, Sil.Rmemory Sil.Mobjc
+                 | Some _, Sil.Rmemory Sil.Mnew when !Config.curr_language = Config.C_CPP ->
+                     ml_bucket_opt = None, exn_leak
                  | Some _, Sil.Rmemory _ -> !Config.curr_language = Config.Java, exn_leak
                  | Some _, Sil.Rignore -> true, exn_leak
                  | Some _, Sil.Rfile -> false, exn_leak

infer/src/backend/inferanalyze.ml

@@ -87,8 +87,8 @@ let excluded_files : string list ref = ref []
 (** Absolute path to the project source, used for relative paths in the exclude list *)
 let source_path = ref ""
 
-(** List of obj memory leak buckets to be checked in objc *)
-let objc_ml_buckets_arg = ref "cf"
+(** List of obj memory leak buckets to be checked in Objective-C/C++ *)
+let ml_buckets_arg = ref "cf"
 
 (** Whether specs can be cleaned up before starting analysis *)
 let allow_specs_cleanup = ref false
@@ -148,8 +148,8 @@ let arg_desc =
         "-version", Arg.Unit print_version, None, "print version information and exit";
         "-version_json", Arg.Unit print_version_json, None, "print version json formatted";
         "-objcm", Arg.Set Config.objc_memory_model_on, None, "Use ObjC memory model";
-        "-objc_ml_buckets", Arg.Set_string objc_ml_buckets_arg, Some "objc_ml_buckets",
-        "memory leak buckets to be checked, separated by commas. The possible buckets are cf (Core Foundation), arc, narc (No arc)";
+        "-ml_buckets", Arg.Set_string ml_buckets_arg, Some "ml_buckets",
+        "memory leak buckets to be checked, separated by commas. The possible buckets are cf (Core Foundation), arc, narc (No arc), cpp";
       ] in
     Arg2.create_options_desc false "Analysis Options" desc in
   let reserved_arg =
@@ -891,7 +891,7 @@ let () =
     else !err_file_cmdline in
   let analyzer_out_of = open_output_file Logging.set_out_formatter analyzer_out_file in
   let analyzer_err_of = open_output_file Logging.set_err_formatter analyzer_err_file in
-  if (!Config.curr_language = Config.C_CPP) then Mleak_buckets.init_buckets !objc_ml_buckets_arg;
+  if (!Config.curr_language = Config.C_CPP) then Mleak_buckets.init_buckets !ml_buckets_arg;
 
   process_cluster_cmdline_exit ();
 

infer/src/backend/mleak_buckets.ml

@@ -7,7 +7,8 @@
  * LICENSE file in the root directory of this source tree. An additional grant
  * of patent rights can be found in the PATENTS file in the same directory.
  *)
-(** This module handles buckets of memory leaks in Objective-C *)
+
+(** This module handles buckets of memory leaks in Objective-C/C++ *)
 
 open Utils
 
@@ -19,14 +20,16 @@ type mleak_bucket =
   | MLeak_cf
   | MLeak_arc
   | MLeak_no_arc
+  | MLeak_cpp
 
-let objc_ml_buckets = ref []
+let ml_buckets = ref []
 
 let bucket_from_string bucket_s =
   match bucket_s with
   | "cf" -> MLeak_cf
   | "arc" -> MLeak_arc
   | "narc" -> MLeak_no_arc
+  | "cpp" -> MLeak_cpp
   | _ -> assert false
 
 let bucket_to_string bucket =
@@ -34,12 +37,14 @@ let bucket_to_string bucket =
   | MLeak_cf -> "Core Foundation"
   | MLeak_arc -> "Arc"
   | MLeak_no_arc -> "No arc"
+  | MLeak_cpp -> "Cpp"
 
 let bucket_to_message bucket =
   match bucket with
   | MLeak_cf -> "[CF]"
   | MLeak_arc -> "[ARC]"
   | MLeak_no_arc -> "[NO ARC]"
+  | MLeak_cpp -> "[CPP]"
 
 let mleak_bucket_compare b1 b2 =
   match b1, b2 with
@@ -50,18 +55,21 @@ let mleak_bucket_compare b1 b2 =
   | MLeak_arc, _ -> -1
   | _, MLeak_arc -> 1
   | MLeak_no_arc, MLeak_no_arc -> 0
+  | MLeak_no_arc, _ -> -1
+  | _, MLeak_no_arc -> 1
+  | MLeak_cpp, MLeak_cpp -> 0
 
 let mleak_bucket_eq b1 b2 =
   mleak_bucket_compare b1 b2 = 0
 
-let init_buckets objc_ml_buckets_arg =
+let init_buckets ml_buckets_arg =
   let buckets =
-    Str.split (Str.regexp bucket_delimiter) objc_ml_buckets_arg in
+    Str.split (Str.regexp bucket_delimiter) ml_buckets_arg in
   let buckets =
     match buckets with
     | ["all"] -> []
     | _ -> list_map bucket_from_string buckets in
-  objc_ml_buckets := buckets
+  ml_buckets := buckets
 
 let contains_cf ml_buckets =
   list_mem mleak_bucket_eq MLeak_cf ml_buckets
@@ -72,28 +80,37 @@ let contains_arc ml_buckets =
 let contains_narc ml_buckets =
   list_mem mleak_bucket_eq MLeak_no_arc ml_buckets
 
+let contains_cpp ml_buckets =
+  list_mem mleak_bucket_eq MLeak_cpp ml_buckets
+
 let should_raise_leak_cf typ =
-  if contains_cf !objc_ml_buckets then
+  if contains_cf !ml_buckets then
     Objc_models.is_core_lib_type typ
   else false
 
 let should_raise_leak_arc () =
-  if contains_arc !objc_ml_buckets then
+  if contains_arc !ml_buckets then
     !Config.arc_mode
   else false
 
 let should_raise_leak_no_arc () =
-  if contains_narc !objc_ml_buckets then
+  if contains_narc !ml_buckets then
     not (!Config.arc_mode)
   else false
 
-(* Returns whether a memory leak should be raised. If objc_ml_buckets is not there, *)
-(* then raise all memory leaks. *)
+(* Returns whether a memory leak should be raised for a C++ object.*)
+(* If ml_buckets contains cpp, then check leaks from C++ objects. *)
+let should_raise_cpp_leak () =
+  if contains_cpp !ml_buckets then
+    Some (bucket_to_message MLeak_cpp)
+  else None
+
+(* Returns whether a memory leak should be raised. *)
 (* If cf is passed, then check leaks from Core Foundation. *)
 (* If arc is passed, check leaks from code that compiles with arc*)
 (* If no arc is passed check the leaks from code that compiles without arc *)
-let should_raise_leak typ =
-  if list_length !objc_ml_buckets = 0 then Some ""
+let should_raise_objc_leak typ =
+  if list_length !ml_buckets = 0 then Some ""
   else
   if should_raise_leak_cf typ then Some (bucket_to_message MLeak_cf)
   else if should_raise_leak_arc () then Some (bucket_to_message MLeak_arc)

infer/src/backend/mleak_buckets.mli

@@ -13,10 +13,12 @@ val objc_arc_flag : string
 
 val init_buckets : string -> unit
 
-(* Returns whether a memory leak should be raised. If objc_ml_buckets is not there, *)
-(* then raise all memory leaks. *)
+(* Returns whether a memory leak should be raised.  *)
 (* If cf is passed, then check leaks from Core Foundation. *)
 (* If arc is passed, check leaks from code that compiles with arc*)
 (* If no arc is passed check the leaks from code that compiles without arc *)
-val should_raise_leak : Sil.typ -> string option
+val should_raise_objc_leak : Sil.typ -> string option
 
+(* Returns whether a memory leak should be raised for a C++ object.*)
+(* If ml_buckets contains cpp, then check leaks from C++ objects. *)
+val should_raise_cpp_leak : unit -> string option

infer/tests/codetoanalyze/cpp/errors/memory_leaks/object_leak.cpp

@@ -0,0 +1,20 @@
+/*
+* Copyright (c) 2015 - present Facebook, Inc.
+* All rights reserved.
+*
+* This source code is licensed under the BSD style license found in the
+* LICENSE file in the root directory of this source tree. An additional grant
+* of patent rights can be found in the PATENTS file in the same directory.
+*/
+
+class Rectangle {
+    int width, height;
+public:
+    Rectangle(int x, int y) : width(x), height(y) {}
+    int area(void) { return width * height; }
+};
+
+int main() {
+    Rectangle *bar = new Rectangle (5, 6);
+    return 0;
+}

infer/tests/endtoend/cpp/MemoryLeakCppBucketTest.java

@@ -0,0 +1,62 @@
+/*
+* Copyright (c) 2015 - present Facebook, Inc.
+* All rights reserved.
+*
+* This source code is licensed under the BSD style license found in the
+* LICENSE file in the root directory of this source tree. An additional grant
+* of patent rights can be found in the PATENTS file in the same directory.
+*/
+
+package endtoend.cpp;
+
+import static org.hamcrest.MatcherAssert.assertThat;
+import static utils.matchers.ResultContainsExactly.containsExactly;
+
+import com.google.common.collect.ImmutableList;
+
+import org.junit.BeforeClass;
+import org.junit.ClassRule;
+import org.junit.Test;
+
+import java.io.IOException;
+
+import utils.DebuggableTemporaryFolder;
+import utils.InferException;
+import utils.InferResults;
+import utils.InferRunner;
+
+public class MemoryLeakCppBucketTest {
+
+  public static final String FILE =
+      "infer/tests/codetoanalyze/cpp/errors/memory_leaks/object_leak.cpp";
+
+  private static ImmutableList<String> inferCmd;
+
+  public static final String MEMORY_LEAK = "MEMORY_LEAK";
+
+  @ClassRule
+  public static DebuggableTemporaryFolder folder =
+      new DebuggableTemporaryFolder();
+
+  @BeforeClass
+  public static void runInfer() throws InterruptedException, IOException {
+    inferCmd = InferRunner.createCPPInferCommandWithMLBuckets(folder, FILE, "cpp");
+  }
+
+  @Test
+  public void whenInferRunsOnObject_leakThenMLIsFound()
+      throws InterruptedException, IOException, InferException {
+    InferResults inferResults = InferRunner.runInferCPP(inferCmd);
+    String[] methods = { "main" };
+    assertThat(
+        "Results should contain " + MEMORY_LEAK,
+        inferResults,
+        containsExactly(
+            MEMORY_LEAK,
+            FILE,
+            methods
+        )
+    );
+  }
+
+}

infer/tests/endtoend/cpp/MemoryLeakTest.java

@@ -0,0 +1,62 @@
+/*
+* Copyright (c) 2015 - present Facebook, Inc.
+* All rights reserved.
+*
+* This source code is licensed under the BSD style license found in the
+* LICENSE file in the root directory of this source tree. An additional grant
+* of patent rights can be found in the PATENTS file in the same directory.
+*/
+
+package endtoend.cpp;
+
+import static org.hamcrest.MatcherAssert.assertThat;
+import static utils.matchers.ResultContainsExactly.containsExactly;
+
+import com.google.common.collect.ImmutableList;
+
+import org.junit.BeforeClass;
+import org.junit.ClassRule;
+import org.junit.Test;
+
+import java.io.IOException;
+
+import utils.DebuggableTemporaryFolder;
+import utils.InferException;
+import utils.InferResults;
+import utils.InferRunner;
+
+public class MemoryLeakTest {
+
+  public static final String FILE =
+      "infer/tests/codetoanalyze/cpp/errors/memory_leaks/object_leak.cpp";
+
+  private static ImmutableList<String> inferCmd;
+
+  public static final String MEMORY_LEAK = "MEMORY_LEAK";
+
+  @ClassRule
+  public static DebuggableTemporaryFolder folder =
+      new DebuggableTemporaryFolder();
+
+  @BeforeClass
+  public static void runInfer() throws InterruptedException, IOException {
+    inferCmd = InferRunner.createCPPInferCommand(folder, FILE);
+  }
+
+  @Test
+  public void whenInferRunsOnObject_leakThenMLIsNotFound()
+      throws InterruptedException, IOException, InferException {
+    InferResults inferResults = InferRunner.runInferCPP(inferCmd);
+    String[] methods = { }; // no memory leak
+    assertThat(
+        "Results should contain " + MEMORY_LEAK,
+        inferResults,
+        containsExactly(
+            MEMORY_LEAK,
+            FILE,
+            methods
+        )
+    );
+  }
+
+}

infer/tests/utils/InferRunner.java

@@ -253,7 +253,7 @@ public class InferRunner {
     ImmutableList.Builder<String> ml_bucketsOption =
         new ImmutableList.Builder<>();
     ml_bucketsOption
-        .add("--objc_ml_buckets")
+        .add("--ml_buckets")
         .add(ml_buckets == null ? "all" : ml_buckets);
     ImmutableList<String> inferCmd = new ImmutableList.Builder<String>()
         .add("infer")
@@ -360,6 +360,20 @@ public class InferRunner {
         false);
   }
 
+  public static ImmutableList<String> createCPPInferCommandWithMLBuckets(
+      TemporaryFolder folder,
+      String sourceFile,
+      String ml_bucket) throws IOException, InterruptedException {
+    return createClangInferCommand(
+        folder,
+        sourceFile,
+        Language.CPP,
+        true,
+        null,
+        ml_bucket,
+        false);
+  }
+
   public static ImmutableList<String> createObjCInferCommand(
       TemporaryFolder folder,
       String sourceFile) throws IOException, InterruptedException {