[BOLT] Detect and reject binaries built for coverage.

Summary: Don't attempt to optimize binaries built with coverage support. (cherry picked from FBD4810330)
llvm · Mar 31, 2017 · f7d32f7 · f7d32f7
1 parent c166a8c
commit f7d32f7
Showing 1 changed file with 5 additions and 0 deletions.
diff --git a/bolt/RewriteInstance.cpp b/bolt/RewriteInstance.cpp
@@ -837,6 +837,11 @@ void RewriteInstance::discoverFileObjects() {
                 "support. Cannot optimize.\n";
       exit(1);
     }
+    if (NameOrError && NameOrError->startswith("__llvm_coverage_mapping")) {
+      errs() << "BOLT-ERROR: input file was compiled or linked with coverage "
+                "support. Cannot optimize.\n";
+      exit(1);
+    }
 
     if (Symbol.getFlags() & SymbolRef::SF_Undefined)
       continue;