[memprof] Report an error when buildid and profile do not match

Author: zcfh

llvm/lib/ProfileData/MemProfReader.cpp

@@ -444,7 +444,11 @@ Error RawMemProfReader::setupForSymbolization() {
       ProfiledTextSegmentEnd = Entry.End;
     }
   }
-  assert(NumMatched != 0 && "No matching executable segments in segment info.");
+  if (NumMatched == 0)
+    return make_error<StringError>(
+        Twine("No matching executable segments found in binary ") +
+            Binary.getBinary()->getFileName(),
+        inconvertibleErrorCode());
   assert((PreferredTextSegmentAddress == 0 ||
           (PreferredTextSegmentAddress == ProfiledTextSegmentStart)) &&
          "Expect text segment address to be 0 or equal to profiled text "

llvm/test/tools/llvm-profdata/memprof-buildid.test

@@ -14,3 +14,11 @@ CHECK: Build ID: [[ID:[[:xdigit:]]+]]
 
 COM: Then match it with the profdata output.
 CHECK-COUNT-1: BuildId: {{.*}}[[ID]]
+
+Test that profile build id does not match build id in the binary
+RUN: not llvm-profdata show --memory %p/Inputs/buildid.memprofraw --profiled-binary %p/Inputs/basic.memprofexe -o - 2>&1 | FileCheck %s -check-prefix=BUILDID-NOT-MATCH
+
+Test error message when profile build id does not match build id in a different binary.
+RUN: not llvm-profdata merge %p/Inputs/buildid.memprofraw %p/Inputs/basic.memprofraw  --profiled-binary %p/Inputs/basic.memprofexe -o %t4.prof 2>&1 | FileCheck %s -check-prefix=BUILDID-NOT-MATCH
+
+BUILDID-NOT-MATCH: No matching executable segments found in binary