[ios] Model NSData initWithBytesNoCopy:data length:dataLength

Reviewed By: akotulski

Differential Revision: D4666223

fbshipit-source-id: 2c88ce8

infer/models/objc/src/NSData.m

@@ -40,6 +40,10 @@ NSData* __objc_alloc(NSData*);
     return nil;
 }
 
+- (instancetype)initWithBytesNoCopy:(void*)bytes length:(NSUInteger)length {
+  return [self initWithBytesNoCopy:bytes length:length freeWhenDone:YES];
+}
+
 - (instancetype)initWithBytesNoCopy:(void*)bytes
                              length:(NSUInteger)length
                        freeWhenDone:(BOOL)flag {

infer/tests/codetoanalyze/objc/errors/Makefile

@@ -25,7 +25,8 @@ SOURCES_DEFAULT = \
   field_superclass/B.m \
   memory_leaks_benchmark/MemoryLeakRaii.m \
   memory_leaks_benchmark/NSMakeCollectableExample.m \
-  memory_leaks_benchmark/NSStringInitWithBytesNoCopyExample.m \
+  memory_leaks_benchmark/NSString_models_tests.m \
+	memory_leaks_benchmark/NSData_models_tests.m \
   memory_leaks_benchmark/RetainReleaseExampleBucketing.m \
   npe/Fraction.m \
   npe/NPD_core_foundation.m \

infer/tests/codetoanalyze/objc/errors/issues.exp

@@ -90,9 +90,9 @@ codetoanalyze/objc/errors/variadic_methods/premature_nil_termination.m, Prematur
 codetoanalyze/objc/shared/memory_leaks_benchmark/TollBridgeExample.m, TollBridgeExample_brideRetained, 2, MEMORY_LEAK, [start of procedure brideRetained]
 codetoanalyze/objc/shared/memory_leaks_benchmark/TollBridgeExample.m, TollBridgeExample_bridge, 2, MEMORY_LEAK, [start of procedure bridge]
 codetoanalyze/objc/shared/memory_leaks_benchmark/TollBridgeExample.m, bridgeDictionaryNoLeak, 1, UNINITIALIZED_VALUE, [start of procedure bridgeDictionaryNoLeak()]
-codetoanalyze/objc/errors/memory_leaks_benchmark/NSStringInitWithBytesNoCopyExample.m, StringInitA_macForIV:, 2, MEMORY_LEAK, [start of procedure macForIV:]
+codetoanalyze/objc/errors/memory_leaks_benchmark/NSData_models_tests.m, NSData_models_tests_macForIV:, 2, MEMORY_LEAK, [start of procedure macForIV:]
-codetoanalyze/objc/errors/memory_leaks_benchmark/NSStringInitWithBytesNoCopyExample.m, createURLQueryStringBodyEscaping, 6, PRECONDITION_NOT_MET, [start of procedure createURLQueryStringBodyEscaping(),Condition is true]
+codetoanalyze/objc/errors/memory_leaks_benchmark/NSString_models_tests.m, createURLQueryStringBodyEscaping, 6, PRECONDITION_NOT_MET, [start of procedure createURLQueryStringBodyEscaping(),Condition is true]
-codetoanalyze/objc/errors/memory_leaks_benchmark/NSStringInitWithBytesNoCopyExample.m, createURLQueryStringBodyEscaping, 11, UNINITIALIZED_VALUE, [start of procedure createURLQueryStringBodyEscaping(),Condition is false]
+codetoanalyze/objc/errors/memory_leaks_benchmark/NSString_models_tests.m, createURLQueryStringBodyEscaping, 11, UNINITIALIZED_VALUE, [start of procedure createURLQueryStringBodyEscaping(),Condition is false]
 codetoanalyze/objc/errors/memory_leaks_benchmark/RetainReleaseExampleBucketing.m, RetainReleaseTest, 0, RETURN_VALUE_IGNORED, [start of procedure RetainReleaseTest()]
 codetoanalyze/objc/errors/npe/Fraction.m, test_virtual_call, 7, NULL_DEREFERENCE, [start of procedure test_virtual_call(),start of procedure setNumerator:,return from a call to Fraction_setNumerator:,start of procedure getNumerator,return from a call to Fraction_getNumerator,Condition is true]
 codetoanalyze/objc/errors/npe/NPD_core_foundation.m, NullDeref_createCloseCrossGlyphNoLeak:, 5, Assert_failure, [start of procedure createCloseCrossGlyphNoLeak:]

infer/tests/codetoanalyze/objc/errors/memory_leaks_benchmark/NSData_models_tests.m

@@ -0,0 +1,49 @@
+/*
+ * Copyright (c) 2014 - 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.
+ */
+
+#import <Foundation/Foundation.h>
+#import <stdlib.h>
+
+@interface NSData_models_tests : NSObject
+
+@end
+
+@implementation NSData_models_tests
+
++ (NSData*)randomBytes:(NSUInteger)numOfBytes {
+  uint8_t* buffer = malloc(numOfBytes);
+  NSData* data = [NSData dataWithBytesNoCopy:buffer length:numOfBytes];
+  if (data) {
+    return data;
+  } else {
+    free(buffer);
+    return nil;
+  }
+}
+
+- (NSData*)readDataOfLength:(NSUInteger)length {
+  size_t bytesLength = length;
+  void* bytes = malloc(bytesLength);
+  if (bytes == NULL) {
+    return nil;
+  }
+  return [[NSData alloc] initWithBytesNoCopy:bytes length:5 freeWhenDone:YES];
+}
+
+- (NSData*)decodedImageData:(size_t)dataLength {
+  void* data = calloc(dataLength, 1);
+  return [[NSData alloc] initWithBytesNoCopy:data length:dataLength];
+}
+
+- (NSData*)macForIV:(NSData*)IV {
+  uint8_t* result = malloc(10);
+  return [NSData dataWithBytesNoCopy:result length:10];
+}
+
+@end

infer/tests/codetoanalyze/objc/errors/memory_leaks_benchmark/NSString_models_tests.m

@@ -30,31 +30,6 @@ NSString* createURLQueryStringBodyEscaping(NSDictionary* parameters,
   return resultString;
 }
 
-+ (NSData*)randomBytes:(NSUInteger)numOfBytes {
-  uint8_t* buffer = malloc(numOfBytes);
-  NSData* data = [NSData dataWithBytesNoCopy:buffer length:numOfBytes];
-  if (data) {
-    return data;
-  } else {
-    free(buffer);
-    return nil;
-  }
-}
-
-- (NSData*)readDataOfLength:(NSUInteger)length {
-  size_t bytesLength = length;
-  void* bytes = malloc(bytesLength);
-  if (bytes == NULL) {
-    return nil;
-  }
-  return [[NSData alloc] initWithBytesNoCopy:bytes length:5 freeWhenDone:YES];
-}
-
-- (NSData*)macForIV:(NSData*)IV {
-  uint8_t* result = malloc(10);
-  return [NSData dataWithBytesNoCopy:result length:10];
-}
-
 - (NSString*)hexStringValue {
   size_t hexLen = 2 * 10 * sizeof(char);
   char* outString = (char*)malloc(hexLen + 1);