2492b5a125
Make it possible to use online profile merging ("%m" mode) with
continuous sync ("%c" mode).
To implement this, the merged profile is locked in the runtime
initialization step and either a) filled out for the first time or b)
checked for compatibility. Then, the profile can simply be mmap()'d with
MAP_SHARED set. With the mmap() in place, counter updates from every
process which uses an image are mapped onto the same set of physical
pages assigned by the filesystem cache. After the mmap() is set up, the
profile is unlocked.
Differential Revision: https://reviews.llvm.org/D69586
145 lines
4.9 KiB
C
145 lines
4.9 KiB
C
/*===- InstrProfilingPort.h- Support library for PGO instrumentation ------===*\
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|*
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|* Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
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|* See https://llvm.org/LICENSE.txt for license information.
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|* SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
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|*
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\*===----------------------------------------------------------------------===*/
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/* This header must be included after all others so it can provide fallback
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definitions for stuff missing in system headers. */
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#ifndef PROFILE_INSTRPROFILING_PORT_H_
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#define PROFILE_INSTRPROFILING_PORT_H_
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#ifdef _MSC_VER
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#define COMPILER_RT_ALIGNAS(x) __declspec(align(x))
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#define COMPILER_RT_VISIBILITY
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/* FIXME: selectany does not have the same semantics as weak. */
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#define COMPILER_RT_WEAK __declspec(selectany)
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/* Need to include <windows.h> */
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#define COMPILER_RT_ALLOCA _alloca
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/* Need to include <stdio.h> and <io.h> */
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#define COMPILER_RT_FTRUNCATE(f,l) _chsize(_fileno(f),l)
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#define COMPILER_RT_ALWAYS_INLINE __forceinline
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#define COMPILER_RT_CLEANUP(x)
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#elif __GNUC__
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#define COMPILER_RT_ALIGNAS(x) __attribute__((aligned(x)))
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#define COMPILER_RT_VISIBILITY __attribute__((visibility("hidden")))
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#define COMPILER_RT_WEAK __attribute__((weak))
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#define COMPILER_RT_ALLOCA __builtin_alloca
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#define COMPILER_RT_FTRUNCATE(f,l) ftruncate(fileno(f),l)
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#define COMPILER_RT_ALWAYS_INLINE inline __attribute((always_inline))
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#define COMPILER_RT_CLEANUP(x) __attribute__((cleanup(x)))
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#endif
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#if defined(__APPLE__)
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#define COMPILER_RT_SEG "__DATA,"
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#else
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#define COMPILER_RT_SEG ""
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#endif
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#ifdef _MSC_VER
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#define COMPILER_RT_SECTION(Sect) __declspec(allocate(Sect))
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#else
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#define COMPILER_RT_SECTION(Sect) __attribute__((section(Sect)))
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#endif
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#define COMPILER_RT_MAX_HOSTLEN 128
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#ifdef __ORBIS__
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#define COMPILER_RT_GETHOSTNAME(Name, Len) ((void)(Name), (void)(Len), (-1))
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#else
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#define COMPILER_RT_GETHOSTNAME(Name, Len) lprofGetHostName(Name, Len)
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#endif
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#if COMPILER_RT_HAS_ATOMICS == 1
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#ifdef _MSC_VER
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#include <windows.h>
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#if _MSC_VER < 1900
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#define snprintf _snprintf
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#endif
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#if defined(_WIN64)
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#define COMPILER_RT_BOOL_CMPXCHG(Ptr, OldV, NewV) \
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(InterlockedCompareExchange64((LONGLONG volatile *)Ptr, (LONGLONG)NewV, \
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(LONGLONG)OldV) == (LONGLONG)OldV)
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#define COMPILER_RT_PTR_FETCH_ADD(DomType, PtrVar, PtrIncr) \
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(DomType *)InterlockedExchangeAdd64((LONGLONG volatile *)&PtrVar, \
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(LONGLONG)sizeof(DomType) * PtrIncr)
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#else /* !defined(_WIN64) */
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#define COMPILER_RT_BOOL_CMPXCHG(Ptr, OldV, NewV) \
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(InterlockedCompareExchange((LONG volatile *)Ptr, (LONG)NewV, (LONG)OldV) == \
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(LONG)OldV)
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#define COMPILER_RT_PTR_FETCH_ADD(DomType, PtrVar, PtrIncr) \
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(DomType *)InterlockedExchangeAdd((LONG volatile *)&PtrVar, \
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(LONG)sizeof(DomType) * PtrIncr)
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#endif
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#else /* !defined(_MSC_VER) */
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#define COMPILER_RT_BOOL_CMPXCHG(Ptr, OldV, NewV) \
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__sync_bool_compare_and_swap(Ptr, OldV, NewV)
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#define COMPILER_RT_PTR_FETCH_ADD(DomType, PtrVar, PtrIncr) \
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(DomType *)__sync_fetch_and_add((long *)&PtrVar, sizeof(DomType) * PtrIncr)
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#endif
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#else /* COMPILER_RT_HAS_ATOMICS != 1 */
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#include "InstrProfilingUtil.h"
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#define COMPILER_RT_BOOL_CMPXCHG(Ptr, OldV, NewV) \
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lprofBoolCmpXchg((void **)Ptr, OldV, NewV)
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#define COMPILER_RT_PTR_FETCH_ADD(DomType, PtrVar, PtrIncr) \
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(DomType *)lprofPtrFetchAdd((void **)&PtrVar, sizeof(DomType) * PtrIncr)
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#endif
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#if defined(_WIN32)
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#define DIR_SEPARATOR '\\'
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#define DIR_SEPARATOR_2 '/'
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#else
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#define DIR_SEPARATOR '/'
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#endif
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#ifndef DIR_SEPARATOR_2
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#define IS_DIR_SEPARATOR(ch) ((ch) == DIR_SEPARATOR)
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#else /* DIR_SEPARATOR_2 */
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#define IS_DIR_SEPARATOR(ch) \
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(((ch) == DIR_SEPARATOR) || ((ch) == DIR_SEPARATOR_2))
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#endif /* DIR_SEPARATOR_2 */
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#if defined(_WIN32)
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#include <windows.h>
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static inline size_t getpagesize() {
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SYSTEM_INFO S;
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GetNativeSystemInfo(&S);
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return S.dwPageSize;
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}
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#else /* defined(_WIN32) */
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#include <unistd.h>
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#endif /* defined(_WIN32) */
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#define PROF_ERR(Format, ...) \
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fprintf(stderr, "LLVM Profile Error: " Format, __VA_ARGS__);
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#define PROF_WARN(Format, ...) \
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fprintf(stderr, "LLVM Profile Warning: " Format, __VA_ARGS__);
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#define PROF_NOTE(Format, ...) \
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fprintf(stderr, "LLVM Profile Note: " Format, __VA_ARGS__);
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#ifndef MAP_FILE
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#define MAP_FILE 0
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#endif
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#ifndef O_BINARY
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#define O_BINARY 0
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#endif
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#if defined(__FreeBSD__)
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#include <inttypes.h>
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#include <sys/types.h>
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#else /* defined(__FreeBSD__) */
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#include <inttypes.h>
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#include <stdint.h>
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#endif /* defined(__FreeBSD__) && defined(__i386__) */
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#endif /* PROFILE_INSTRPROFILING_PORT_H_ */
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