Index: llvm/test/tools/llvm-profdata/malformed-ptr-to-counter-array.test
===================================================================
--- llvm/test/tools/llvm-profdata/malformed-ptr-to-counter-array.test
+++ llvm/test/tools/llvm-profdata/malformed-ptr-to-counter-array.test
@@ -1,5 +1,50 @@
-REQUIRES: zlib
+// Header
+//
+// INSTR_PROF_RAW_HEADER(uint64_t, Magic, __llvm_profile_get_magic())
+// INSTR_PROF_RAW_HEADER(uint64_t, Version, __llvm_profile_get_version())
+// INSTR_PROF_RAW_HEADER(uint64_t, DataSize, DataSize)
+// INSTR_PROF_RAW_HEADER(uint64_t, CountersSize, CountersSize)
+// INSTR_PROF_RAW_HEADER(uint64_t, NamesSize,  NamesSize)
+// INSTR_PROF_RAW_HEADER(uint64_t, CountersDelta, (uintptr_t)CountersBegin)
+// INSTR_PROF_RAW_HEADER(uint64_t, NamesDelta, (uintptr_t)NamesBegin)
+// INSTR_PROF_RAW_HEADER(uint64_t, ValueKindLast, IPVK_Last)
 
-RUN: not llvm-profdata merge -o /dev/null %p/Inputs/malformed-ptr-to-counter-array.profraw 2>&1 | FileCheck %s
+RUN: printf '\201rforpl\377' > %t.profraw
+RUN: printf '\4\0\0\0\0\0\0\0' >> %t.profraw
+RUN: printf '\1\0\0\0\0\0\0\0' >> %t.profraw
+RUN: printf '\2\0\0\0\0\0\0\0' >> %t.profraw
+RUN: printf '\10\0\0\0\0\0\0\0' >> %t.profraw
+RUN: printf '\0\0\6\0\1\0\0\0' >> %t.profraw
+RUN: printf '\0\0\6\0\2\0\0\0' >> %t.profraw
+RUN: printf '\0\0\0\0\0\0\0\0' >> %t.profraw
+
+// Data Section
+//
+// struct ProfData {
+// #define INSTR_PROF_DATA(Type, LLVMType, Name, Initializer) \
+//    Type Name;
+// #include "llvm/ProfileData/InstrProfData.inc"
+// };
+
+RUN: printf '\067\265\035\031\112\165\023\344' >> %t.profraw
+RUN: printf '\02\0\0\0\0\0\0\0' >> %t.profraw
+
+// Note: The CounterPtr here is off-by-one. This should trigger a malformed profile error.
+RUN: printf '\0\0\6\0\1\0\0\1' >> %t.profraw
+
+RUN: printf '\0\0\0\0\0\0\0\0' >> %t.profraw
+RUN: printf '\0\0\0\0\0\0\0\0' >> %t.profraw
+RUN: printf '\02\0\0\0\0\0\0\0' >> %t.profraw
+
+// Counter Section
+
+RUN: printf '\067\0\0\0\0\0\0\0' >> %t.profraw
+RUN: printf '\101\0\0\0\0\0\0\0' >> %t.profraw
+
+// Name Section
+
+RUN: printf '\3\0bar\0\0\0' >> %t.profraw
+
+RUN: not llvm-profdata merge -o /dev/null %t.profraw 2>&1 | FileCheck %s
 
 CHECK: Malformed instrumentation profile data