llvm/compiler-rt/lib/profile/InstrProfilingMerge.c

/*===- InstrProfilingMerge.c - Profile in-process Merging  ---------------===*\
|*
|* 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
|*
|*===----------------------------------------------------------------------===*
|* This file defines the API needed for in-process merging of profile data
|* stored in memory buffer.
\*===---------------------------------------------------------------------===*/

#include "InstrProfiling.h"
#include "InstrProfilingInternal.h"
#include "InstrProfilingUtil.h"

#define INSTR_PROF_VALUE_PROF_DATA
#include "profile/InstrProfData.inc"

COMPILER_RT_VISIBILITY
void (*VPMergeHook)(ValueProfData *, __llvm_profile_data *);

COMPILER_RT_VISIBILITY
uint64_t lprofGetLoadModuleSignature(void) { … }

#ifdef __GNUC__
#pragma GCC diagnostic push
#pragma GCC diagnostic ignored "-Wcast-qual"
#elif defined(__clang__)
#pragma clang diagnostic push
#pragma clang diagnostic ignored "-Wcast-qual"
#endif

/* Returns 1 if profile is not structurally compatible.  */
COMPILER_RT_VISIBILITY
int __llvm_profile_check_compatibility(const char *ProfileData,
                                       uint64_t ProfileSize) { … }

static uintptr_t signextIfWin64(void *V) { … }

// Skip names section, vtable profile data section and vtable names section
// for runtime profile merge. To merge runtime addresses from multiple
// profiles collected from the same instrumented binary, the binary should be
// loaded at fixed base address (e.g., build with -no-pie, or run with ASLR
// disabled). In this set-up these three sections remain unchanged.
static uint64_t
getDistanceFromCounterToValueProf(const __llvm_profile_header *const Header) { … }

COMPILER_RT_VISIBILITY
int __llvm_profile_merge_from_buffer(const char *ProfileData,
                                     uint64_t ProfileSize) { … }

#ifdef __GNUC__
#pragma GCC diagnostic pop
#elif defined(__clang__)
#pragma clang diagnostic pop
#endif