[cost] Add PERFORMANCE_VARIATION FP test for Java access methods

Reviewed By: mbouaziz

Differential Revision: D15695390

fbshipit-source-id: 45f6bb68a

infer/tests/build_systems/differential_of_costs_report/costs_summary.json.exp

@@ -1 +1 @@
-{"top":{"current":4,"previous":2},"zero":{"current":0,"previous":0},"degrees":[{"degree":0,"current":6,"previous":4},{"degree":100,"current":2,"previous":4},{"degree":101,"current":4,"previous":0},{"degree":200,"current":0,"previous":4}]}
+{"top":{"current":4,"previous":2},"zero":{"current":0,"previous":0},"degrees":[{"degree":0,"current":7,"previous":7},{"degree":100,"current":2,"previous":4},{"degree":101,"current":4,"previous":0},{"degree":200,"current":3,"previous":4}]}

infer/tests/build_systems/differential_of_costs_report/introduced.exp

@@ -1,5 +1,7 @@
-INFINITE_EXECUTION_TIME_CALL, no_bucket, src/DiffExample.java, DiffExample.f1(int):void, 0, [Unbounded loop,Loop at line 26]
-PERFORMANCE_VARIATION, no_bucket, src/DiffExample.java, DiffExample.f4(int):int, 0, [Updated Cost is 6 + 5 ⋅ k (degree is 1),{k},Loop at line 45]
+PERFORMANCE_VARIATION, no_bucket, src/DiffExample.java, DiffExample$1.toString():java.lang.String, 0, [Updated Cost is 16 + 13 ⋅ this.this$0.z + 5 ⋅ this.this$0.z × this.this$0.z (degree is 2),{this.this$0.z},call to void DiffExample.f8(int),call to int DiffExample.f4(int),Loop at line 57,{this.this$0.z},call to void DiffExample.f8(int),Loop at line 79]
+PERFORMANCE_VARIATION, no_bucket, src/DiffExample.java, DiffExample.access$000(int):void, 0, [Updated Cost is 7 + 13 ⋅ x0 + 5 ⋅ x0 × x0 (degree is 2),{x0},call to void DiffExample.f8(int),call to int DiffExample.f4(int),Loop at line 57,{x0},call to void DiffExample.f8(int),Loop at line 79]
+INFINITE_EXECUTION_TIME_CALL, no_bucket, src/DiffExample.java, DiffExample.f1(int):void, 0, [Unbounded loop,Loop at line 38]
+PERFORMANCE_VARIATION, no_bucket, src/DiffExample.java, DiffExample.f4(int):int, 0, [Updated Cost is 6 + 5 ⋅ k (degree is 1),{k},Loop at line 57]
 PERFORMANCE_VARIATION, no_bucket, src/DiffExample.java, DiffExample.f5(java.util.ArrayList):void, 0, [Updated Cost is 2 + list.length × log(list.length) (degree is 1 + 1⋅log),{list.length},Modeled call to Collections.sort,{list.length},Modeled call to Collections.sort]
 INFINITE_EXECUTION_TIME_CALL, no_bucket, src/DiffExampleColdStart.java, DiffExampleColdStart.f1(int):void, 0, [Unbounded loop,Loop at line 26]
 TIME_COMPLEXITY_INCREASE_COLD_START, no_bucket, src/DiffExampleColdStart.java, DiffExampleColdStart.f4(int):int, 0, [Updated Cost is 6 + 5 ⋅ k (degree is 1),{k},Loop at line 45]

infer/tests/build_systems/differential_of_costs_report/preexisting.exp

@@ -1,2 +1,2 @@
-INFINITE_EXECUTION_TIME_CALL, no_bucket, src/DiffExample.java, DiffExample.f7(int):void, 0, [Call to void DiffExample.f1(int),Unbounded loop,Loop at line 26]
+INFINITE_EXECUTION_TIME_CALL, no_bucket, src/DiffExample.java, DiffExample.f7(int):void, 0, [Call to void DiffExample.f1(int),Unbounded loop,Loop at line 38]
 INFINITE_EXECUTION_TIME_CALL, no_bucket, src/DiffExampleColdStart.java, DiffExampleColdStart.f7(int):void, 0, [Call to void DiffExampleColdStart.f1(int),Unbounded loop,Loop at line 26]

infer/tests/build_systems/differential_of_costs_report/src/DiffExample.java.current

@@ -10,6 +10,7 @@ import java.util.ArrayList;
 // This class has the following costs:
 // 1 bottom (zero), 2 constant, 1 linear, 1 top
 // constructor: constant
+// private access$000 method for accessing f8 
 // f1: top
 // f2: bottom (zero)
 // f3: constant
@@ -17,9 +18,20 @@ import java.util.ArrayList;
 // f5: n log n
 // f6: n log n
 // f7: top by call to f1
+// f8: quadratic
 
 public class DiffExample {
 
+  int z;
+  ArrayList<String> list =
+      new ArrayList<String>() {
+      
+        @Override
+        public String toString() {
+           f8(z);
+          return super.toString();
+        }
+      };
     // cost: top
     private static void f1(int k) {
         int i = 0;
@@ -61,4 +73,12 @@ public class DiffExample {
     private static void f7(int k) {
         f1(k);
     }
+
+   // cost: quadratic
+    private static void f8(int k) {
+        for (int i = 0; i < k; i++) {
+            f4(k);
+        }
+    }
+
 }

infer/tests/build_systems/differential_of_costs_report/src/DiffExample.java.previous

@@ -5,9 +5,12 @@
  * LICENSE file in the root directory of this source tree.
  */
  
+import java.util.ArrayList;
+
 // This class has the following costs:
 // 2 constant, 1 linear, 1 quadratic
 // constructor: constant
+// private access$000 method for accessing f4 
 // f1: linear
 // f2: quadratic
 // f4: constant
@@ -16,6 +19,17 @@
 // f7: top
 
 public class DiffExample {
+
+  int z;
+  ArrayList<String> list =
+      new ArrayList<String>() {
+ 
+        @Override
+        public String toString() {
+          f4(z);  
+          return super.toString();
+        }
+      };
     // cost: linear
     private static int f1(int k) {
         for (int i = 0; i < k; i++) {