Use OS X compatible gcov with experimental_ios_test. -- MOS_MIGRATED_REVID=103549584

diff --git a/src/main/java/com/google/devtools/build/lib/analysis/config/BuildConfiguration.java b/src/main/java/com/google/devtools/build/lib/analysis/config/BuildConfiguration.java
index 43cf12f..fd09e4f 100644
--- a/src/main/java/com/google/devtools/build/lib/analysis/config/BuildConfiguration.java
+++ b/src/main/java/com/google/devtools/build/lib/analysis/config/BuildConfiguration.java

@@ -812,6 +812,15 @@
         category = "undocumented")
     public Label objcGcovBinary;
 
+    // This performs the same function as objc_gcov_binary but applies to experminental_ios_test
+    // rather than ios_test.
+    // TODO(bazel-team): Remove this once experimental_ios_test replaces to ios_test.
+    @Option(name = "experimental_objc_gcov_binary",
+            converter = LabelConverter.class,
+            defaultValue = "//third_party/gcov:gcov_for_xcode_osx",
+            category = "undocumented")
+    public Label experimentalObjcGcovBinary;
+
     @Option(name = "experimental_dynamic_configs",
         defaultValue = "false",
         category = "undocumented",
@@ -875,6 +884,7 @@
       }
       if (collectCodeCoverage) {
         labelMap.put("objc_gcov", objcGcovBinary);
+        labelMap.put("experimental_objc_gcov", experimentalObjcGcovBinary);
       }
     }
   }

diff --git a/src/main/java/com/google/devtools/build/lib/bazel/rules/objc/BazelIosTestRule.java b/src/main/java/com/google/devtools/build/lib/bazel/rules/objc/BazelIosTestRule.java
index 82471dd..8443a45 100644
--- a/src/main/java/com/google/devtools/build/lib/bazel/rules/objc/BazelIosTestRule.java
+++ b/src/main/java/com/google/devtools/build/lib/bazel/rules/objc/BazelIosTestRule.java

@@ -96,7 +96,7 @@
                   return ImmutableList.of();
                 }
                 return ImmutableList.of(
-                    configuration.getFragment(ObjcConfiguration.class).getGcovLabel());
+                    configuration.getFragment(ObjcConfiguration.class).getExperimentalGcovLabel());
               }
             }))
         .build();

diff --git a/src/main/java/com/google/devtools/build/lib/rules/objc/ExperimentalIosTestRule.java b/src/main/java/com/google/devtools/build/lib/rules/objc/ExperimentalIosTestRule.java
index b3e2ff8..129870e 100644
--- a/src/main/java/com/google/devtools/build/lib/rules/objc/ExperimentalIosTestRule.java
+++ b/src/main/java/com/google/devtools/build/lib/rules/objc/ExperimentalIosTestRule.java

@@ -95,7 +95,7 @@
                   return ImmutableList.of();
                 }
                 return ImmutableList.of(
-                    configuration.getFragment(ObjcConfiguration.class).getGcovLabel());
+                    configuration.getFragment(ObjcConfiguration.class).getExperimentalGcovLabel());
               }
             }))
         .build();

diff --git a/src/main/java/com/google/devtools/build/lib/rules/objc/ObjcConfiguration.java b/src/main/java/com/google/devtools/build/lib/rules/objc/ObjcConfiguration.java
index e6846e3..24bd94a4 100644
--- a/src/main/java/com/google/devtools/build/lib/rules/objc/ObjcConfiguration.java
+++ b/src/main/java/com/google/devtools/build/lib/rules/objc/ObjcConfiguration.java

@@ -69,13 +69,14 @@
   private final ConfigurationDistinguisher configurationDistinguisher;
   @Nullable private final Path clientWorkspaceRoot;
 
-  // We only load these labels if the mode which uses them is enabled. That is know as part of the
+  // We only load these labels if the mode which uses them is enabled. That is known as part of the
   // BuildConfiguration. This label needs to be part of a configuration because only configurations
   // can conditionally cause loading.
   // They are referenced from late bound attributes, and if loading wasn't forced in a
   // configuration, the late bound attribute will fail to be initialized because it hasn't been
   // loaded.
   @Nullable private final Label gcovLabel;
+  @Nullable private final Label experimentalGcovLabel;
   @Nullable private final Label dumpSymsLabel;
   @Nullable private final Label defaultProvisioningProfileLabel;
 
@@ -96,6 +97,7 @@
     this.copts = ImmutableList.copyOf(objcOptions.copts);
     this.compilationMode = Preconditions.checkNotNull(options.compilationMode, "compilationMode");
     this.gcovLabel = options.objcGcovBinary;
+    this.experimentalGcovLabel = options.experimentalObjcGcovBinary;
     this.dumpSymsLabel = objcOptions.dumpSyms;
     this.defaultProvisioningProfileLabel = objcOptions.defaultProvisioningProfile;
     this.iosMultiCpus = Preconditions.checkNotNull(objcOptions.iosMultiCpus, "iosMultiCpus");
@@ -217,6 +219,14 @@
   }
 
   /**
+   * Returns the label of the experimental gcov binary, used to get test coverage data for {@code
+   * experimental_ios_test}. Null iff not in coverage mode.
+   */
+  @Nullable public Label getExperimentalGcovLabel() {
+    return experimentalGcovLabel;
+  }
+
+  /**
    * Returns the label of the dump_syms binary, used to get debug symbols from a binary. Null iff
    * !{@link #generateDebugSymbols}.
    */