/*===- InstrProfiling.c - Support library for PGO instrumentation ---------===*\ |* |* Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions. |* See https://llvm.org/LICENSE.txt for license information. |* SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception |* \*===----------------------------------------------------------------------===*/ // Note: This is linked into the Darwin kernel, and must remain compatible // with freestanding compilation. See `darwin_add_builtin_libraries`. #include #include #include #include #include "InstrProfiling.h" #include "InstrProfilingInternal.h" #define INSTR_PROF_VALUE_PROF_DATA #include "profile/InstrProfData.inc" COMPILER_RT_VISIBILITY uint64_t __llvm_profile_get_magic(void) { return sizeof(void *) == sizeof(uint64_t) ? (INSTR_PROF_RAW_MAGIC_64) : (INSTR_PROF_RAW_MAGIC_32); } COMPILER_RT_VISIBILITY void __llvm_profile_set_dumped(void) { lprofSetProfileDumped(1); } /* Return the number of bytes needed to add to SizeInBytes to make it * the result a multiple of 8. */ COMPILER_RT_VISIBILITY uint8_t __llvm_profile_get_num_padding_bytes(uint64_t SizeInBytes) { return 7 & (sizeof(uint64_t) - SizeInBytes % sizeof(uint64_t)); } COMPILER_RT_VISIBILITY uint64_t __llvm_profile_get_version(void) { return INSTR_PROF_RAW_VERSION_VAR; } COMPILER_RT_VISIBILITY void __llvm_profile_reset_counters(void) { char *I = __llvm_profile_begin_counters(); char *E = __llvm_profile_end_counters(); char ResetValue = (__llvm_profile_get_version() & VARIANT_MASK_BYTE_COVERAGE) ? 0xFF : 0; memset(I, ResetValue, E - I); const __llvm_profile_data *DataBegin = __llvm_profile_begin_data(); const __llvm_profile_data *DataEnd = __llvm_profile_end_data(); const __llvm_profile_data *DI; for (DI = DataBegin; DI < DataEnd; ++DI) { uint64_t CurrentVSiteCount = 0; uint32_t VKI, i; if (!DI->Values) continue; ValueProfNode **ValueCounters = (ValueProfNode **)DI->Values; for (VKI = IPVK_First; VKI <= IPVK_Last; ++VKI) CurrentVSiteCount += DI->NumValueSites[VKI]; for (i = 0; i < CurrentVSiteCount; ++i) { ValueProfNode *CurrVNode = ValueCounters[i]; while (CurrVNode) { CurrVNode->Count = 0; CurrVNode = CurrVNode->Next; } } } lprofSetProfileDumped(0); }