diff options
Diffstat (limited to 'compiler-rt/lib/profile/InstrProfilingMerge.c')
| -rw-r--r-- | compiler-rt/lib/profile/InstrProfilingMerge.c | 19 |
1 files changed, 19 insertions, 0 deletions
diff --git a/compiler-rt/lib/profile/InstrProfilingMerge.c b/compiler-rt/lib/profile/InstrProfilingMerge.c index 9ea8bb5a76a..a2021154df7 100644 --- a/compiler-rt/lib/profile/InstrProfilingMerge.c +++ b/compiler-rt/lib/profile/InstrProfilingMerge.c @@ -19,6 +19,22 @@ COMPILER_RT_WEAK void (*VPMergeHook)(ValueProfData *, __llvm_profile_data *) = NULL; +COMPILER_RT_VISIBILITY +uint64_t lprofGetLoadModuleSignature() { + /* A very fast way to compute a module signature. */ + uint64_t CounterSize = (uint64_t)(__llvm_profile_end_counters() - + __llvm_profile_begin_counters()); + uint64_t DataSize = __llvm_profile_get_data_size(__llvm_profile_begin_data(), + __llvm_profile_end_data()); + uint64_t NamesSize = + (uint64_t)(__llvm_profile_end_names() - __llvm_profile_begin_names()); + uint64_t NumVnodes = + (uint64_t)(__llvm_profile_end_vnodes() - __llvm_profile_begin_vnodes()); + const __llvm_profile_data *FirstD = __llvm_profile_begin_data(); + + return (NamesSize << 40) + (CounterSize << 30) + (DataSize << 20) + + (NumVnodes << 10) + (DataSize > 0 ? FirstD->NameRef : 0); +} /* Returns 1 if profile is not structurally compatible. */ COMPILER_RT_VISIBILITY @@ -31,6 +47,9 @@ int __llvm_profile_check_compatibility(const char *ProfileData, (__llvm_profile_data *)(ProfileData + sizeof(__llvm_profile_header)); SrcDataEnd = SrcDataStart + Header->DataSize; + if (ProfileSize < sizeof(__llvm_profile_header)) + return 1; + /* Check the header first. */ if (Header->Magic != __llvm_profile_get_magic() || Header->Version != __llvm_profile_get_version() || |
