[linters] Take current os version into account in the unavailable api check

Reviewed By: jvillard, martinoluca

Differential Revision: D4508223

fbshipit-source-id: c44b75d

infer/src/clang/CLintersContext.ml

@@ -11,6 +11,7 @@ open! IStd
 
 type if_context = {
   within_responds_to_selector_block : string list;
+  ios_version_guard : string list
 }
 
 type context = {

infer/src/clang/CiOSVersionNumbers.ml

@@ -0,0 +1,74 @@
+(*
+ * Copyright (c) 2017 - 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.
+ *)
+open! IStd
+
+(* version macros like kCFCoreFoundationVersionNumber_iOS_9_0 are
+   tied to specific float values, e.g. 1240.1.
+   To be found in CoreFoundation/CFBase.h *)
+
+type machine_readable_version = float
+type human_readable_version = string
+type t = machine_readable_version * human_readable_version
+
+let version_numbers : t list =
+  [(478.23, "2.0");
+   (478.26, "2.1");
+   (478.29, "2.2");
+   (478.47, "3.0");
+   (478.52, "3.1");
+   (478.61, "3.2");
+   (550.32, "4.0");
+   (550.38, "4.1");
+   (550.52, "4.3");
+   (675.00, "5.0");
+   (690.10, "5.1");
+   (793.00, "6.1");
+   (847.20, "7.0");
+   (847.24, "7.1");
+   (1140.1, "8.0");
+   (1141.14, "8.1");
+   (1142.16, "8.2");
+   (1144.17, "8.3");
+   (1145.15, "8.4");
+   (1240.1, "9.0");
+   (1241.11, "9.1");
+   (1242.13, "9.3");
+   (1280.38, "9.4");
+   (1348.0, "10.0");
+   (1348.22, "10.2");]
+
+let sort_versions versions =
+  let compare (version_float1, _) (version_float2, _) =
+    Float.compare version_float1 version_float2 in
+  List.sort ~cmp:compare versions
+
+let version_of number_s : human_readable_version option =
+  let epsilon = 0.001 in
+  let rec version_of_aux version_numbers number =
+    match version_numbers with
+    | (version_n, version_s) :: (next_version_n, next_version_s) :: rest ->
+        if (number -. version_n) < epsilon && (number -. version_n) > -. epsilon then Some version_s
+        else if (number >= (version_n +. epsilon) && number <= (next_version_n -. epsilon))
+        then Some next_version_s
+        else version_of_aux ((next_version_n, next_version_s) :: rest) number
+    | [version_n, version_s] ->
+        if number >= version_n then Some version_s
+        else None
+    | [] -> None in
+  let number_opt =
+    try Some (float_of_string number_s)
+    with Failure _ -> None in
+  match number_opt with
+  | None -> None
+  | Some number -> version_of_aux (sort_versions version_numbers) number
+
+let pp_diff_of_version_opt fmt (expected, actual) =
+  let option_to_string opt = Option.value ~default:"" opt in
+  Format.fprintf fmt
+    "Expected: [%s] Found: [%s]" (option_to_string expected) (option_to_string actual)

infer/src/clang/CiOSVersionNumbers.mli

@@ -0,0 +1,17 @@
+(*
+ * Copyright (c) 2017 - 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.
+ *)
+
+type machine_readable_version = float
+type human_readable_version = string
+type t = machine_readable_version * human_readable_version
+
+val version_of : string -> human_readable_version option
+
+val pp_diff_of_version_opt : Format.formatter ->
+  (human_readable_version option * human_readable_version option) -> unit

infer/src/clang/cFrontend_checkers_main.ml

@@ -56,14 +56,63 @@ let rec get_responds_to_selector stmt =
       get_responds_to_selector stmt
   | _ -> []
 
+let rec is_core_foundation_version_number stmt =
+  let open Clang_ast_t in
+  match stmt with
+  | DeclRefExpr (_, _, _, decl_ref_info) ->
+      (match decl_ref_info.drti_decl_ref with
+       | Some decl_ref_info ->
+           let name_info, _, _ = CAst_utils.get_info_from_decl_ref  decl_ref_info in
+           String.equal name_info.ni_name "kCFCoreFoundationVersionNumber"
+       | None -> false)
+  | ImplicitCastExpr (_, [stmt], _, _) ->
+      is_core_foundation_version_number stmt
+  | _ -> false
+
+let rec current_os_version_constant stmt =
+  let open Clang_ast_t in
+  match stmt with
+  | FloatingLiteral (_, _, _, number) ->
+      CiOSVersionNumbers.version_of number
+  | IntegerLiteral (_, _, _, info) ->
+      CiOSVersionNumbers.version_of info.ili_value
+  | ImplicitCastExpr (_, [stmt], _, _) ->
+      current_os_version_constant stmt
+  | _ -> None
+
+let rec get_current_os_version stmt =
+  let open Clang_ast_t in
+  match stmt with
+  | BinaryOperator (_, [stmt1;stmt2], _, bo_info) when
+      PVariant.(=) bo_info.Clang_ast_t.boi_kind `GE &&
+      is_core_foundation_version_number stmt1 ->
+      Option.to_list (current_os_version_constant stmt2)
+  | BinaryOperator (_, [stmt1;stmt2], _, bo_info) when
+      PVariant.(=) bo_info.Clang_ast_t.boi_kind `LE &&
+      is_core_foundation_version_number stmt2 ->
+      Option.to_list (current_os_version_constant stmt1)
+  | BinaryOperator (_, [stmt1;stmt2], _, bo_info) when
+      PVariant.(=) bo_info.Clang_ast_t.boi_kind `LAnd ->
+      List.append (get_current_os_version stmt1) (get_current_os_version stmt2)
+  | ImplicitCastExpr (_, [stmt], _, _)
+  | ParenExpr (_, [stmt], _)
+  | ExprWithCleanups(_, [stmt], _, _) ->
+      get_current_os_version stmt
+  | _ -> []
+
 let compute_if_context (context:CLintersContext.context) stmt =
-  let prev_responds_to_selector =
+  let selector = get_responds_to_selector stmt in
+  let os_version = get_current_os_version stmt in
+  let within_responds_to_selector_block, ios_version_guard =
     match context.if_context with
-    | Some if_context -> if_context.within_responds_to_selector_block
+    | Some if_context ->
-    | None -> [] in
+        let within_responds_to_selector_block =
-  let within_responds_to_selector_block =
+          List.append selector if_context.within_responds_to_selector_block in
-    List.append (get_responds_to_selector stmt) (prev_responds_to_selector) in
+        let ios_version_guard =
-  Some ({within_responds_to_selector_block} : CLintersContext.if_context)
+          List.append os_version if_context.ios_version_guard in
+        within_responds_to_selector_block, ios_version_guard
+    | None -> selector, os_version in
+  Some ({within_responds_to_selector_block; ios_version_guard} : CLintersContext.if_context)
 
 let is_factory_method (context: CLintersContext.context) decl =
   let interface_decl_opt =

infer/src/clang/cPredicates.ml

@@ -232,11 +232,20 @@ let isa classname an =
        | _ -> false)
   | _ -> false
 
-let decl_unavailable_in_supported_ios_sdk an =
+
+let decl_unavailable_in_supported_ios_sdk (cxt : CLintersContext.context) an =
+  let allowed_os_versions =
+    match Config.iphoneos_target_sdk_version,
+          (cxt.if_context : CLintersContext.if_context option) with
+    | Some iphoneos_target_sdk_version, Some if_context ->
+        iphoneos_target_sdk_version :: if_context.ios_version_guard
+    | Some iphoneos_target_sdk_version, None -> [iphoneos_target_sdk_version]
+    | _ -> [] in
+  let max_allowed_version_opt = List.max_elt allowed_os_versions ~cmp:Utils.compare_versions in
   let available_attr_ios_sdk = get_available_attr_ios_sdk an in
-  match available_attr_ios_sdk, Config.iphoneos_target_sdk_version with
+  match available_attr_ios_sdk, max_allowed_version_opt with
-  | Some available_attr_ios_sdk, Some iphoneos_target_sdk_version ->
+  | Some available_attr_ios_sdk, Some max_allowed_version ->
-      Int.equal (Utils.compare_versions available_attr_ios_sdk iphoneos_target_sdk_version) 1
+      (Utils.compare_versions available_attr_ios_sdk max_allowed_version) > 0
   | _ -> false
 
 

infer/src/clang/cPredicates.mli

@@ -53,7 +53,8 @@ val is_node : string -> Ctl_parser_types.ast_node -> bool
 
 val pp_predicate : Format.formatter -> t -> unit
 
-val decl_unavailable_in_supported_ios_sdk : Ctl_parser_types.ast_node -> bool
+val decl_unavailable_in_supported_ios_sdk : CLintersContext.context -> Ctl_parser_types.ast_node
+  -> bool
 
 val get_available_attr_ios_sdk : Ctl_parser_types.ast_node -> string option
 

infer/src/clang/cTL.ml

@@ -433,7 +433,7 @@ let rec eval_Atomic pred_name args an lcxt =
   | "in_node", [nodename], an -> CPredicates.is_node nodename an
   | "isa", [classname], an -> CPredicates.isa classname an
   | "decl_unavailable_in_supported_ios_sdk", [], an ->
-      CPredicates.decl_unavailable_in_supported_ios_sdk an
+      CPredicates.decl_unavailable_in_supported_ios_sdk lcxt an
   | "within_responds_to_selector_block", [], an ->
       CPredicates.within_responds_to_selector_block lcxt an
   | _ -> failwith ("ERROR: Undefined Predicate or wrong set of arguments: " ^ pred_name)

infer/src/unit/CiOSVersionNumbersTests.ml

@@ -0,0 +1,55 @@
+(*
+ * Copyright (c) 2017 - 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.
+ *)
+
+open! IStd
+open OUnit2
+
+let test_correct_ios_version =
+  let create_test (version : string) (expected_version : string option) _ =
+    let output = CiOSVersionNumbers.version_of version in
+    let cmp = fun s1 s2 -> Option.equal String.equal s1 s2 in
+    assert_equal ~pp_diff:CiOSVersionNumbers.pp_diff_of_version_opt
+      ~cmp:cmp expected_version output in
+  [
+    (
+      "test_correct_ios_version_some_version",
+      "847.20",
+      (Some "7.0")
+    );
+    (
+      "test_correct_ios_version_edge_version",
+      "1348.22",
+      (Some "10.2")
+    );
+    (
+      "test_correct_ios_version_ck",
+      "1223.1",
+      (Some "9.0")
+    );
+    (
+      "test_correct_ios_version_9",
+      "1240.0999",
+      (Some "9.0")
+    );
+    (
+      "test_correct_ios_version_2",
+      "478.230001",
+      (Some "2.0")
+    );
+    (
+      "test_correct_ios_version_smaller",
+      "1.49",
+      (None)
+    )
+  ]
+  |> List.map
+    ~f:(fun (name, test_input, expected_output) ->
+        name >:: create_test test_input expected_output)
+
+let tests = "cios_version_numbers_suite" >::: test_correct_ios_version

infer/src/unit/inferunit.ml

@@ -20,6 +20,7 @@ let () =
     AddressTakenTests.tests;
     BoundedCallTreeTests.tests;
     CopyPropagationTests.tests;
+    CiOSVersionNumbersTests.tests;
     ProcCfgTests.tests;
     LivenessTests.tests;
     SchedulerTests.tests;

infer/tests/codetoanalyze/objc/iosLinters/unavailable_api_allowed_cases.m

@@ -1,89 +0,0 @@
-/*
- * Copyright (c) 2017 - 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 <UIKit/UIKit.h>
-
-@interface Unavailable_api_allowed_cases : NSObject
-
-- (void)m NS_AVAILABLE(10_12, 10_0);
-
-- (void)n NS_AVAILABLE(10_12, 10_0);
-
-@end
-
-@implementation Unavailable_api_allowed_cases
-
-- (void)m {
-}
-
-- (void)n {
-}
-
-// no bug
-- (void)with_responds_to_selector:(Unavailable_api_allowed_cases*)a {
-  if ([a respondsToSelector:@selector(m)]) {
-    int x = 1;
-    [a m];
-    x = 3;
-  }
-}
-// no bug
-- (void)with_responds_to_selector:(Unavailable_api_allowed_cases*)a
-                              and:(BOOL)ok {
-  if ([a respondsToSelector:@selector(m)] && ok) {
-    [a m];
-  }
-}
-
-// bug
-- (void)without_responds_to_selector:(Unavailable_api_allowed_cases*)a {
-  [a m];
-}
-
-// bug
-- (void)with_responds_to_selector_in_else:(Unavailable_api_allowed_cases*)a {
-  if ([a respondsToSelector:@selector(m)]) {
-  } else {
-    [a m];
-  }
-}
-
-// no bug
-- (void)with_responds_to_selector_nested_if:(Unavailable_api_allowed_cases*)a {
-  if ([a respondsToSelector:@selector(m)]) {
-    if ([a respondsToSelector:@selector(n)]) {
-      [a m];
-      [a n];
-    }
-  }
-}
-
-// no bug
-- (void)with_responds_to_selector_two_selectors:
-    (Unavailable_api_allowed_cases*)a {
-  if ([a respondsToSelector:@selector(m)] &&
-      [a respondsToSelector:@selector(n)]) {
-    [a m];
-    [a n];
-  }
-}
-
-// no bug
-- (void)uifont_with_respondstoselector:(CGFloat)size {
-  UIFont* font;
-  if ([UIFont respondsToSelector:@selector(systemFontOfSize:weight:)]) {
-    font = [UIFont systemFontOfSize:size weight:0];
-  }
-}
-
-// bug
-- (void)uifont_without_respondstoselector:(CGFloat)size {
-  UIFont* font = [UIFont systemFontOfSize:size weight:0];
-}
-
-@end

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

@@ -1,5 +1,7 @@
-codetoanalyze/objc/ioslinters/unavailable_api_allowed_cases.m, Unavailable_api_allowed_cases_uifont_without_respondstoselector:, 86, UNAVAILABLE_API_IN_SUPPORTED_IOS_SDK, []
+codetoanalyze/objc/ioslinters/unavailable_api_allowed_cases.m, Unavailable_api_allowed_cases_m2, 120, UNAVAILABLE_API_IN_SUPPORTED_IOS_SDK, []
-codetoanalyze/objc/ioslinters/unavailable_api_allowed_cases.m, Unavailable_api_allowed_cases_with_responds_to_selector_in_else:, 52, UNAVAILABLE_API_IN_SUPPORTED_IOS_SDK, []
+codetoanalyze/objc/ioslinters/unavailable_api_allowed_cases.m, Unavailable_api_allowed_cases_m3:, 128, UNAVAILABLE_API_IN_SUPPORTED_IOS_SDK, []
-codetoanalyze/objc/ioslinters/unavailable_api_allowed_cases.m, Unavailable_api_allowed_cases_without_responds_to_selector:, 45, UNAVAILABLE_API_IN_SUPPORTED_IOS_SDK, []
+codetoanalyze/objc/ioslinters/unavailable_api_allowed_cases.m, Unavailable_api_allowed_cases_uifont_without_respondstoselector:, 102, UNAVAILABLE_API_IN_SUPPORTED_IOS_SDK, []
+codetoanalyze/objc/ioslinters/unavailable_api_allowed_cases.m, Unavailable_api_allowed_cases_with_responds_to_selector_in_else:, 68, UNAVAILABLE_API_IN_SUPPORTED_IOS_SDK, []
+codetoanalyze/objc/ioslinters/unavailable_api_allowed_cases.m, Unavailable_api_allowed_cases_without_responds_to_selector:, 61, UNAVAILABLE_API_IN_SUPPORTED_IOS_SDK, []
 codetoanalyze/objc/ioslinters/unavailable_api_in_supported_ios_sdk.m, OpenURLOptionsFromSourceApplication, 18, UNAVAILABLE_API_IN_SUPPORTED_IOS_SDK, []
 codetoanalyze/objc/ioslinters/unavailable_api_in_supported_ios_sdk.m, Unavailable_api_in_supported_ios_sdk_test:and:, 11, UNAVAILABLE_API_IN_SUPPORTED_IOS_SDK, []

infer/tests/codetoanalyze/objc/ioslinters/unavailable_api_allowed_cases.m

@@ -0,0 +1,188 @@
+/*
+ * Copyright (c) 2017 - 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 <UIKit/UIKit.h>
+
+@interface Unavailable_api_allowed_cases : NSObject
+
+- (void)m NS_AVAILABLE(10_12, 10_0);
+
+- (void)n NS_AVAILABLE(10_12, 10_0);
+
+@end
+
+#define CK_AT_LEAST_IOS9 (kCFCoreFoundationVersionNumber >= 1223.1)
+
+#define AT_LEAST_IOS9 \
+  (kCFCoreFoundationVersionNumber >= kCFCoreFoundationVersionNumber_iOS_9_0)
+
+#ifndef kCFCoreFoundationVersionNumber_iOS_10_0
+#define kCFCoreFoundationVersionNumber_iOS_10_0 1348
+#endif
+
+#ifndef kCFCoreFoundationVersionNumber_iOS_10_2
+#define kCFCoreFoundationVersionNumber_iOS_10_2 1348.22
+#endif
+
+#define AT_LEAST_IOS10 \
+  (kCFCoreFoundationVersionNumber >= kCFCoreFoundationVersionNumber_iOS_10_0)
+
+@implementation Unavailable_api_allowed_cases
+
+- (void)m {
+}
+
+- (void)n {
+}
+
+// no bug
+- (void)with_responds_to_selector:(Unavailable_api_allowed_cases*)a {
+  if ([a respondsToSelector:@selector(m)]) {
+    int x = 1;
+    [a m];
+    x = 3;
+  }
+}
+// no bug
+- (void)with_responds_to_selector:(Unavailable_api_allowed_cases*)a
+                              and:(BOOL)ok {
+  if ([a respondsToSelector:@selector(m)] && ok) {
+    [a m];
+  }
+}
+
+// bug
+- (void)without_responds_to_selector:(Unavailable_api_allowed_cases*)a {
+  [a m];
+}
+
+// bug
+- (void)with_responds_to_selector_in_else:(Unavailable_api_allowed_cases*)a {
+  if ([a respondsToSelector:@selector(m)]) {
+  } else {
+    [a m];
+  }
+}
+
+// no bug
+- (void)with_responds_to_selector_nested_if:(Unavailable_api_allowed_cases*)a {
+  if ([a respondsToSelector:@selector(m)]) {
+    if ([a respondsToSelector:@selector(n)]) {
+      [a m];
+      [a n];
+    }
+  }
+}
+
+// no bug
+- (void)with_responds_to_selector_two_selectors:
+    (Unavailable_api_allowed_cases*)a {
+  if ([a respondsToSelector:@selector(m)] &&
+      [a respondsToSelector:@selector(n)]) {
+    [a m];
+    [a n];
+  }
+}
+
+// no bug
+- (void)uifont_with_respondstoselector:(CGFloat)size {
+  UIFont* font;
+  if ([UIFont respondsToSelector:@selector(systemFontOfSize:weight:)]) {
+    font = [UIFont systemFontOfSize:size weight:0];
+  }
+}
+
+// bug
+- (void)uifont_without_respondstoselector:(CGFloat)size {
+  UIFont* font = [UIFont systemFontOfSize:size weight:0];
+}
+
+// no bug
+- (void)m1 {
+  NSDictionary* destinationPixelBufferAttributes;
+  if (kCFCoreFoundationVersionNumber >=
+      kCFCoreFoundationVersionNumber_iOS_9_0) {
+    destinationPixelBufferAttributes = @{
+      (NSString*)kCVPixelBufferOpenGLESTextureCacheCompatibilityKey : @YES
+    };
+  }
+}
+
+// bug
+- (void)m2 {
+  NSDictionary* destinationPixelBufferAttributes;
+  destinationPixelBufferAttributes =
+      @{(NSString*)kCVPixelBufferOpenGLESTextureCacheCompatibilityKey : @YES };
+}
+
+// bug
+- (void)m3:(BOOL)ok {
+  NSDictionary* destinationPixelBufferAttributes;
+  if (ok) {
+    destinationPixelBufferAttributes = @{
+      (NSString*)kCVPixelBufferOpenGLESTextureCacheCompatibilityKey : @YES
+    };
+  }
+}
+
+// no bug
+- (void)m4:(BOOL)ok {
+  NSDictionary* destinationPixelBufferAttributes;
+  if (kCFCoreFoundationVersionNumber >=
+          kCFCoreFoundationVersionNumber_iOS_9_0 &&
+      ok) {
+    destinationPixelBufferAttributes = @{
+      (NSString*)kCVPixelBufferOpenGLESTextureCacheCompatibilityKey : @YES
+    };
+  }
+}
+
+// no bug
+- (void)m5 {
+  NSDictionary* destinationPixelBufferAttributes;
+  if (kCFCoreFoundationVersionNumber >=
+          kCFCoreFoundationVersionNumber_iOS_9_0 &&
+      kCFCoreFoundationVersionNumber >=
+          kCFCoreFoundationVersionNumber_iOS_7_0) {
+    destinationPixelBufferAttributes = @{
+      (NSString*)kCVPixelBufferOpenGLESTextureCacheCompatibilityKey : @YES
+    };
+  }
+}
+
+// no bug
+- (void)m6 {
+  NSDictionary* destinationPixelBufferAttributes;
+  if (AT_LEAST_IOS9) {
+    destinationPixelBufferAttributes = @{
+      (NSString*)kCVPixelBufferOpenGLESTextureCacheCompatibilityKey : @YES
+    };
+  }
+}
+
+// no bug
+- (void)m7 {
+  NSDictionary* destinationPixelBufferAttributes;
+  if (CK_AT_LEAST_IOS9) {
+    destinationPixelBufferAttributes = @{
+      (NSString*)kCVPixelBufferOpenGLESTextureCacheCompatibilityKey : @YES
+    };
+  }
+}
+
+// no bug
+- (void)m8 {
+  NSDictionary* destinationPixelBufferAttributes;
+  if (AT_LEAST_IOS10) {
+    destinationPixelBufferAttributes = @{
+      (NSString*)kCVPixelBufferOpenGLESTextureCacheCompatibilityKey : @YES
+    };
+  }
+}
+
+@end