985486dca4
In `initializeProfileForContinuousMode`, we have already locked the profile file when merging is enabled, so there's no need to lock the same file second time in `openFileForMerging`. On Linux/Darwin, the locking the same file twice doesn't cause any problem. But on Windows, it causes the problem to hang forever. With this minor fix, continuous mode seems working with online merging on Windows. Reviewed By: phosek Differential Revision: https://reviews.llvm.org/D154748
1189 lines
39 KiB
C
1189 lines
39 KiB
C
/*===- InstrProfilingFile.c - Write instrumentation to a file -------------===*\
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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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#if !defined(__Fuchsia__)
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#include <assert.h>
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#include <errno.h>
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#include <stdio.h>
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#include <stdlib.h>
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#include <string.h>
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#ifdef _MSC_VER
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/* For _alloca. */
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#include <malloc.h>
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#endif
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#if defined(_WIN32)
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#include "WindowsMMap.h"
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/* For _chsize_s */
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#include <io.h>
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#include <process.h>
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#else
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#include <sys/file.h>
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#include <sys/mman.h>
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#include <unistd.h>
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#if defined(__linux__)
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#include <sys/types.h>
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#endif
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#endif
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#include "InstrProfiling.h"
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#include "InstrProfilingInternal.h"
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#include "InstrProfilingPort.h"
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#include "InstrProfilingUtil.h"
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/* From where is profile name specified.
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* The order the enumerators define their
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* precedence. Re-order them may lead to
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* runtime behavior change. */
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typedef enum ProfileNameSpecifier {
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PNS_unknown = 0,
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PNS_default,
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PNS_command_line,
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PNS_environment,
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PNS_runtime_api
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} ProfileNameSpecifier;
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static const char *getPNSStr(ProfileNameSpecifier PNS) {
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switch (PNS) {
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case PNS_default:
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return "default setting";
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case PNS_command_line:
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return "command line";
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case PNS_environment:
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return "environment variable";
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case PNS_runtime_api:
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return "runtime API";
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default:
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return "Unknown";
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}
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}
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#define MAX_PID_SIZE 16
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/* Data structure holding the result of parsed filename pattern. */
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typedef struct lprofFilename {
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/* File name string possibly with %p or %h specifiers. */
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const char *FilenamePat;
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/* A flag indicating if FilenamePat's memory is allocated
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* by runtime. */
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unsigned OwnsFilenamePat;
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const char *ProfilePathPrefix;
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char PidChars[MAX_PID_SIZE];
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char *TmpDir;
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char Hostname[COMPILER_RT_MAX_HOSTLEN];
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unsigned NumPids;
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unsigned NumHosts;
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/* When in-process merging is enabled, this parameter specifies
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* the total number of profile data files shared by all the processes
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* spawned from the same binary. By default the value is 1. If merging
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* is not enabled, its value should be 0. This parameter is specified
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* by the %[0-9]m specifier. For instance %2m enables merging using
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* 2 profile data files. %1m is equivalent to %m. Also %m specifier
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* can only appear once at the end of the name pattern. */
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unsigned MergePoolSize;
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ProfileNameSpecifier PNS;
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} lprofFilename;
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static lprofFilename lprofCurFilename = {0, 0, 0, {0}, NULL,
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{0}, 0, 0, 0, PNS_unknown};
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static int ProfileMergeRequested = 0;
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static int getProfileFileSizeForMerging(FILE *ProfileFile,
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uint64_t *ProfileFileSize);
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#if defined(__APPLE__)
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static const int ContinuousModeSupported = 1;
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static const int UseBiasVar = 0;
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static const char *FileOpenMode = "a+b";
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static void *BiasAddr = NULL;
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static void *BiasDefaultAddr = NULL;
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static int mmapForContinuousMode(uint64_t CurrentFileOffset, FILE *File) {
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/* Get the sizes of various profile data sections. Taken from
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* __llvm_profile_get_size_for_buffer(). */
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const __llvm_profile_data *DataBegin = __llvm_profile_begin_data();
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const __llvm_profile_data *DataEnd = __llvm_profile_end_data();
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const char *CountersBegin = __llvm_profile_begin_counters();
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const char *CountersEnd = __llvm_profile_end_counters();
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const char *NamesBegin = __llvm_profile_begin_names();
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const char *NamesEnd = __llvm_profile_end_names();
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const uint64_t NamesSize = (NamesEnd - NamesBegin) * sizeof(char);
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uint64_t DataSize = __llvm_profile_get_data_size(DataBegin, DataEnd);
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uint64_t CountersSize =
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__llvm_profile_get_counters_size(CountersBegin, CountersEnd);
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/* Check that the counter and data sections in this image are
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* page-aligned. */
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unsigned PageSize = getpagesize();
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if ((intptr_t)CountersBegin % PageSize != 0) {
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PROF_ERR("Counters section not page-aligned (start = %p, pagesz = %u).\n",
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CountersBegin, PageSize);
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return 1;
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}
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if ((intptr_t)DataBegin % PageSize != 0) {
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PROF_ERR("Data section not page-aligned (start = %p, pagesz = %u).\n",
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DataBegin, PageSize);
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return 1;
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}
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int Fileno = fileno(File);
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/* Determine how much padding is needed before/after the counters and
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* after the names. */
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uint64_t PaddingBytesBeforeCounters, PaddingBytesAfterCounters,
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PaddingBytesAfterNames;
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__llvm_profile_get_padding_sizes_for_counters(
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DataSize, CountersSize, NamesSize, &PaddingBytesBeforeCounters,
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&PaddingBytesAfterCounters, &PaddingBytesAfterNames);
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uint64_t PageAlignedCountersLength = CountersSize + PaddingBytesAfterCounters;
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uint64_t FileOffsetToCounters = CurrentFileOffset +
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sizeof(__llvm_profile_header) + DataSize +
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PaddingBytesBeforeCounters;
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void *CounterMmap = mmap((void *)CountersBegin, PageAlignedCountersLength,
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PROT_READ | PROT_WRITE, MAP_FIXED | MAP_SHARED,
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Fileno, FileOffsetToCounters);
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if (CounterMmap != CountersBegin) {
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PROF_ERR(
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"Continuous counter sync mode is enabled, but mmap() failed (%s).\n"
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" - CountersBegin: %p\n"
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" - PageAlignedCountersLength: %" PRIu64 "\n"
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" - Fileno: %d\n"
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" - FileOffsetToCounters: %" PRIu64 "\n",
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strerror(errno), CountersBegin, PageAlignedCountersLength, Fileno,
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FileOffsetToCounters);
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return 1;
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}
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return 0;
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}
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#elif defined(__ELF__) || defined(_WIN32)
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#define INSTR_PROF_PROFILE_COUNTER_BIAS_DEFAULT_VAR \
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INSTR_PROF_CONCAT(INSTR_PROF_PROFILE_COUNTER_BIAS_VAR, _default)
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COMPILER_RT_VISIBILITY intptr_t INSTR_PROF_PROFILE_COUNTER_BIAS_DEFAULT_VAR = 0;
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/* This variable is a weak external reference which could be used to detect
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* whether or not the compiler defined this symbol. */
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#if defined(_MSC_VER)
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COMPILER_RT_VISIBILITY extern intptr_t INSTR_PROF_PROFILE_COUNTER_BIAS_VAR;
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#if defined(_M_IX86) || defined(__i386__)
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#define WIN_SYM_PREFIX "_"
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#else
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#define WIN_SYM_PREFIX
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#endif
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#pragma comment( \
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linker, "/alternatename:" WIN_SYM_PREFIX INSTR_PROF_QUOTE( \
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INSTR_PROF_PROFILE_COUNTER_BIAS_VAR) "=" WIN_SYM_PREFIX \
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INSTR_PROF_QUOTE(INSTR_PROF_PROFILE_COUNTER_BIAS_DEFAULT_VAR))
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#else
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COMPILER_RT_VISIBILITY extern intptr_t INSTR_PROF_PROFILE_COUNTER_BIAS_VAR
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__attribute__((weak, alias(INSTR_PROF_QUOTE(
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INSTR_PROF_PROFILE_COUNTER_BIAS_DEFAULT_VAR))));
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#endif
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static const int ContinuousModeSupported = 1;
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static const int UseBiasVar = 1;
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/* TODO: If there are two DSOs, the second DSO initilization will truncate the
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* first profile file. */
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static const char *FileOpenMode = "w+b";
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/* This symbol is defined by the compiler when runtime counter relocation is
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* used and runtime provides a weak alias so we can check if it's defined. */
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static void *BiasAddr = &INSTR_PROF_PROFILE_COUNTER_BIAS_VAR;
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static void *BiasDefaultAddr = &INSTR_PROF_PROFILE_COUNTER_BIAS_DEFAULT_VAR;
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static int mmapForContinuousMode(uint64_t CurrentFileOffset, FILE *File) {
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/* Get the sizes of various profile data sections. Taken from
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* __llvm_profile_get_size_for_buffer(). */
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const __llvm_profile_data *DataBegin = __llvm_profile_begin_data();
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const __llvm_profile_data *DataEnd = __llvm_profile_end_data();
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const char *CountersBegin = __llvm_profile_begin_counters();
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const char *CountersEnd = __llvm_profile_end_counters();
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uint64_t DataSize = __llvm_profile_get_data_size(DataBegin, DataEnd);
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/* Get the file size. */
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uint64_t FileSize = 0;
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if (getProfileFileSizeForMerging(File, &FileSize))
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return 1;
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/* Map the profile. */
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char *Profile = (char *)mmap(NULL, FileSize, PROT_READ | PROT_WRITE,
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MAP_SHARED, fileno(File), 0);
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if (Profile == MAP_FAILED) {
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PROF_ERR("Unable to mmap profile: %s\n", strerror(errno));
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return 1;
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}
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const uint64_t CountersOffsetInBiasMode =
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sizeof(__llvm_profile_header) + __llvm_write_binary_ids(NULL) + DataSize;
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/* Update the profile fields based on the current mapping. */
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INSTR_PROF_PROFILE_COUNTER_BIAS_VAR =
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(intptr_t)Profile - (uintptr_t)CountersBegin + CountersOffsetInBiasMode;
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/* Return the memory allocated for counters to OS. */
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lprofReleaseMemoryPagesToOS((uintptr_t)CountersBegin, (uintptr_t)CountersEnd);
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return 0;
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}
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#else
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static const int ContinuousModeSupported = 0;
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static const int UseBiasVar = 0;
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static const char *FileOpenMode = "a+b";
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static void *BiasAddr = NULL;
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static void *BiasDefaultAddr = NULL;
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static int mmapForContinuousMode(uint64_t CurrentFileOffset, FILE *File) {
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return 0;
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}
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#endif
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static int isProfileMergeRequested(void) { return ProfileMergeRequested; }
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static void setProfileMergeRequested(int EnableMerge) {
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ProfileMergeRequested = EnableMerge;
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}
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static FILE *ProfileFile = NULL;
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static FILE *getProfileFile(void) { return ProfileFile; }
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static void setProfileFile(FILE *File) { ProfileFile = File; }
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static int getCurFilenameLength(void);
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static const char *getCurFilename(char *FilenameBuf, int ForceUseBuf);
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static unsigned doMerging(void) {
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return lprofCurFilename.MergePoolSize || isProfileMergeRequested();
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}
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/* Return 1 if there is an error, otherwise return 0. */
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static uint32_t fileWriter(ProfDataWriter *This, ProfDataIOVec *IOVecs,
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uint32_t NumIOVecs) {
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uint32_t I;
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FILE *File = (FILE *)This->WriterCtx;
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char Zeroes[sizeof(uint64_t)] = {0};
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for (I = 0; I < NumIOVecs; I++) {
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if (IOVecs[I].Data) {
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if (fwrite(IOVecs[I].Data, IOVecs[I].ElmSize, IOVecs[I].NumElm, File) !=
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IOVecs[I].NumElm)
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return 1;
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} else if (IOVecs[I].UseZeroPadding) {
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size_t BytesToWrite = IOVecs[I].ElmSize * IOVecs[I].NumElm;
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while (BytesToWrite > 0) {
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size_t PartialWriteLen =
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(sizeof(uint64_t) > BytesToWrite) ? BytesToWrite : sizeof(uint64_t);
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if (fwrite(Zeroes, sizeof(uint8_t), PartialWriteLen, File) !=
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PartialWriteLen) {
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return 1;
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}
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BytesToWrite -= PartialWriteLen;
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}
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} else {
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if (fseek(File, IOVecs[I].ElmSize * IOVecs[I].NumElm, SEEK_CUR) == -1)
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return 1;
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}
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}
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return 0;
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}
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/* TODO: make buffer size controllable by an internal option, and compiler can pass the size
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to runtime via a variable. */
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static uint32_t orderFileWriter(FILE *File, const uint32_t *DataStart) {
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if (fwrite(DataStart, sizeof(uint32_t), INSTR_ORDER_FILE_BUFFER_SIZE, File) !=
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INSTR_ORDER_FILE_BUFFER_SIZE)
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return 1;
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return 0;
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}
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static void initFileWriter(ProfDataWriter *This, FILE *File) {
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This->Write = fileWriter;
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This->WriterCtx = File;
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}
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COMPILER_RT_VISIBILITY ProfBufferIO *
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lprofCreateBufferIOInternal(void *File, uint32_t BufferSz) {
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FreeHook = &free;
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DynamicBufferIOBuffer = (uint8_t *)calloc(BufferSz, 1);
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VPBufferSize = BufferSz;
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ProfDataWriter *fileWriter =
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(ProfDataWriter *)calloc(sizeof(ProfDataWriter), 1);
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initFileWriter(fileWriter, File);
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ProfBufferIO *IO = lprofCreateBufferIO(fileWriter);
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IO->OwnFileWriter = 1;
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return IO;
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}
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static void setupIOBuffer(void) {
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const char *BufferSzStr = 0;
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BufferSzStr = getenv("LLVM_VP_BUFFER_SIZE");
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if (BufferSzStr && BufferSzStr[0]) {
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VPBufferSize = atoi(BufferSzStr);
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DynamicBufferIOBuffer = (uint8_t *)calloc(VPBufferSize, 1);
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}
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}
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/* Get the size of the profile file. If there are any errors, print the
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* message under the assumption that the profile is being read for merging
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* purposes, and return -1. Otherwise return the file size in the inout param
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* \p ProfileFileSize. */
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static int getProfileFileSizeForMerging(FILE *ProfileFile,
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uint64_t *ProfileFileSize) {
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if (fseek(ProfileFile, 0L, SEEK_END) == -1) {
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PROF_ERR("Unable to merge profile data, unable to get size: %s\n",
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strerror(errno));
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return -1;
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}
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*ProfileFileSize = ftell(ProfileFile);
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/* Restore file offset. */
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if (fseek(ProfileFile, 0L, SEEK_SET) == -1) {
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PROF_ERR("Unable to merge profile data, unable to rewind: %s\n",
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strerror(errno));
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return -1;
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}
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if (*ProfileFileSize > 0 &&
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*ProfileFileSize < sizeof(__llvm_profile_header)) {
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PROF_WARN("Unable to merge profile data: %s\n",
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"source profile file is too small.");
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return -1;
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}
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return 0;
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}
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/* mmap() \p ProfileFile for profile merging purposes, assuming that an
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* exclusive lock is held on the file and that \p ProfileFileSize is the
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* length of the file. Return the mmap'd buffer in the inout variable
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* \p ProfileBuffer. Returns -1 on failure. On success, the caller is
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* responsible for unmapping the mmap'd buffer in \p ProfileBuffer. */
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static int mmapProfileForMerging(FILE *ProfileFile, uint64_t ProfileFileSize,
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char **ProfileBuffer) {
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*ProfileBuffer = mmap(NULL, ProfileFileSize, PROT_READ, MAP_SHARED | MAP_FILE,
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fileno(ProfileFile), 0);
|
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if (*ProfileBuffer == MAP_FAILED) {
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PROF_ERR("Unable to merge profile data, mmap failed: %s\n",
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strerror(errno));
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return -1;
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}
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|
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if (__llvm_profile_check_compatibility(*ProfileBuffer, ProfileFileSize)) {
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(void)munmap(*ProfileBuffer, ProfileFileSize);
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PROF_WARN("Unable to merge profile data: %s\n",
|
|
"source profile file is not compatible.");
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return -1;
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|
}
|
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return 0;
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}
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|
|
/* Read profile data in \c ProfileFile and merge with in-memory
|
|
profile counters. Returns -1 if there is fatal error, otheriwse
|
|
0 is returned. Returning 0 does not mean merge is actually
|
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performed. If merge is actually done, *MergeDone is set to 1.
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*/
|
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static int doProfileMerging(FILE *ProfileFile, int *MergeDone) {
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uint64_t ProfileFileSize;
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char *ProfileBuffer;
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|
|
|
/* Get the size of the profile on disk. */
|
|
if (getProfileFileSizeForMerging(ProfileFile, &ProfileFileSize) == -1)
|
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return -1;
|
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|
|
/* Nothing to merge. */
|
|
if (!ProfileFileSize)
|
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return 0;
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|
|
|
/* mmap() the profile and check that it is compatible with the data in
|
|
* the current image. */
|
|
if (mmapProfileForMerging(ProfileFile, ProfileFileSize, &ProfileBuffer) == -1)
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return -1;
|
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|
|
/* Now start merging */
|
|
if (__llvm_profile_merge_from_buffer(ProfileBuffer, ProfileFileSize)) {
|
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PROF_ERR("%s\n", "Invalid profile data to merge");
|
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(void)munmap(ProfileBuffer, ProfileFileSize);
|
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return -1;
|
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}
|
|
|
|
// Truncate the file in case merging of value profile did not happen to
|
|
// prevent from leaving garbage data at the end of the profile file.
|
|
(void)COMPILER_RT_FTRUNCATE(ProfileFile,
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|
__llvm_profile_get_size_for_buffer());
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|
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(void)munmap(ProfileBuffer, ProfileFileSize);
|
|
*MergeDone = 1;
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|
|
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return 0;
|
|
}
|
|
|
|
/* Create the directory holding the file, if needed. */
|
|
static void createProfileDir(const char *Filename) {
|
|
size_t Length = strlen(Filename);
|
|
if (lprofFindFirstDirSeparator(Filename)) {
|
|
char *Copy = (char *)COMPILER_RT_ALLOCA(Length + 1);
|
|
strncpy(Copy, Filename, Length + 1);
|
|
__llvm_profile_recursive_mkdir(Copy);
|
|
}
|
|
}
|
|
|
|
/* Open the profile data for merging. It opens the file in r+b mode with
|
|
* file locking. If the file has content which is compatible with the
|
|
* current process, it also reads in the profile data in the file and merge
|
|
* it with in-memory counters. After the profile data is merged in memory,
|
|
* the original profile data is truncated and gets ready for the profile
|
|
* dumper. With profile merging enabled, each executable as well as any of
|
|
* its instrumented shared libraries dump profile data into their own data file.
|
|
*/
|
|
static FILE *openFileForMerging(const char *ProfileFileName, int *MergeDone) {
|
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FILE *ProfileFile = getProfileFile();
|
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int rc;
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|
|
|
if (!ProfileFile) {
|
|
createProfileDir(ProfileFileName);
|
|
ProfileFile = lprofOpenFileEx(ProfileFileName);
|
|
}
|
|
if (!ProfileFile)
|
|
return NULL;
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|
|
rc = doProfileMerging(ProfileFile, MergeDone);
|
|
if (rc || (!*MergeDone && COMPILER_RT_FTRUNCATE(ProfileFile, 0L)) ||
|
|
fseek(ProfileFile, 0L, SEEK_SET) == -1) {
|
|
PROF_ERR("Profile Merging of file %s failed: %s\n", ProfileFileName,
|
|
strerror(errno));
|
|
fclose(ProfileFile);
|
|
return NULL;
|
|
}
|
|
return ProfileFile;
|
|
}
|
|
|
|
static FILE *getFileObject(const char *OutputName) {
|
|
FILE *File;
|
|
File = getProfileFile();
|
|
if (File != NULL) {
|
|
return File;
|
|
}
|
|
|
|
return fopen(OutputName, "ab");
|
|
}
|
|
|
|
/* Write profile data to file \c OutputName. */
|
|
static int writeFile(const char *OutputName) {
|
|
int RetVal;
|
|
FILE *OutputFile;
|
|
|
|
int MergeDone = 0;
|
|
VPMergeHook = &lprofMergeValueProfData;
|
|
if (doMerging())
|
|
OutputFile = openFileForMerging(OutputName, &MergeDone);
|
|
else
|
|
OutputFile = getFileObject(OutputName);
|
|
|
|
if (!OutputFile)
|
|
return -1;
|
|
|
|
FreeHook = &free;
|
|
setupIOBuffer();
|
|
ProfDataWriter fileWriter;
|
|
initFileWriter(&fileWriter, OutputFile);
|
|
RetVal = lprofWriteData(&fileWriter, lprofGetVPDataReader(), MergeDone);
|
|
|
|
if (OutputFile == getProfileFile()) {
|
|
fflush(OutputFile);
|
|
} else {
|
|
fclose(OutputFile);
|
|
}
|
|
|
|
return RetVal;
|
|
}
|
|
|
|
/* Write order data to file \c OutputName. */
|
|
static int writeOrderFile(const char *OutputName) {
|
|
int RetVal;
|
|
FILE *OutputFile;
|
|
|
|
OutputFile = fopen(OutputName, "w");
|
|
|
|
if (!OutputFile) {
|
|
PROF_WARN("can't open file with mode ab: %s\n", OutputName);
|
|
return -1;
|
|
}
|
|
|
|
FreeHook = &free;
|
|
setupIOBuffer();
|
|
const uint32_t *DataBegin = __llvm_profile_begin_orderfile();
|
|
RetVal = orderFileWriter(OutputFile, DataBegin);
|
|
|
|
fclose(OutputFile);
|
|
return RetVal;
|
|
}
|
|
|
|
#define LPROF_INIT_ONCE_ENV "__LLVM_PROFILE_RT_INIT_ONCE"
|
|
|
|
static void truncateCurrentFile(void) {
|
|
const char *Filename;
|
|
char *FilenameBuf;
|
|
FILE *File;
|
|
int Length;
|
|
|
|
Length = getCurFilenameLength();
|
|
FilenameBuf = (char *)COMPILER_RT_ALLOCA(Length + 1);
|
|
Filename = getCurFilename(FilenameBuf, 0);
|
|
if (!Filename)
|
|
return;
|
|
|
|
/* Only create the profile directory and truncate an existing profile once.
|
|
* In continuous mode, this is necessary, as the profile is written-to by the
|
|
* runtime initializer. */
|
|
int initialized = getenv(LPROF_INIT_ONCE_ENV) != NULL;
|
|
if (initialized)
|
|
return;
|
|
#if defined(_WIN32)
|
|
_putenv(LPROF_INIT_ONCE_ENV "=" LPROF_INIT_ONCE_ENV);
|
|
#else
|
|
setenv(LPROF_INIT_ONCE_ENV, LPROF_INIT_ONCE_ENV, 1);
|
|
#endif
|
|
|
|
/* Create the profile dir (even if online merging is enabled), so that
|
|
* the profile file can be set up if continuous mode is enabled. */
|
|
createProfileDir(Filename);
|
|
|
|
/* By pass file truncation to allow online raw profile merging. */
|
|
if (lprofCurFilename.MergePoolSize)
|
|
return;
|
|
|
|
/* Truncate the file. Later we'll reopen and append. */
|
|
File = fopen(Filename, "w");
|
|
if (!File)
|
|
return;
|
|
fclose(File);
|
|
}
|
|
|
|
/* Write a partial profile to \p Filename, which is required to be backed by
|
|
* the open file object \p File. */
|
|
static int writeProfileWithFileObject(const char *Filename, FILE *File) {
|
|
setProfileFile(File);
|
|
int rc = writeFile(Filename);
|
|
if (rc)
|
|
PROF_ERR("Failed to write file \"%s\": %s\n", Filename, strerror(errno));
|
|
setProfileFile(NULL);
|
|
return rc;
|
|
}
|
|
|
|
static void initializeProfileForContinuousMode(void) {
|
|
if (!__llvm_profile_is_continuous_mode_enabled())
|
|
return;
|
|
if (!ContinuousModeSupported) {
|
|
PROF_ERR("%s\n", "continuous mode is unsupported on this platform");
|
|
return;
|
|
}
|
|
if (UseBiasVar && BiasAddr == BiasDefaultAddr) {
|
|
PROF_ERR("%s\n", "__llvm_profile_counter_bias is undefined");
|
|
return;
|
|
}
|
|
|
|
/* Get the sizes of counter section. */
|
|
uint64_t CountersSize = __llvm_profile_get_counters_size(
|
|
__llvm_profile_begin_counters(), __llvm_profile_end_counters());
|
|
|
|
int Length = getCurFilenameLength();
|
|
char *FilenameBuf = (char *)COMPILER_RT_ALLOCA(Length + 1);
|
|
const char *Filename = getCurFilename(FilenameBuf, 0);
|
|
if (!Filename)
|
|
return;
|
|
|
|
FILE *File = NULL;
|
|
uint64_t CurrentFileOffset = 0;
|
|
if (doMerging()) {
|
|
/* We are merging profiles. Map the counter section as shared memory into
|
|
* the profile, i.e. into each participating process. An increment in one
|
|
* process should be visible to every other process with the same counter
|
|
* section mapped. */
|
|
File = lprofOpenFileEx(Filename);
|
|
if (!File)
|
|
return;
|
|
|
|
uint64_t ProfileFileSize = 0;
|
|
if (getProfileFileSizeForMerging(File, &ProfileFileSize) == -1) {
|
|
lprofUnlockFileHandle(File);
|
|
fclose(File);
|
|
return;
|
|
}
|
|
if (ProfileFileSize == 0) {
|
|
/* Grow the profile so that mmap() can succeed. Leak the file handle, as
|
|
* the file should stay open. */
|
|
if (writeProfileWithFileObject(Filename, File) != 0) {
|
|
lprofUnlockFileHandle(File);
|
|
fclose(File);
|
|
return;
|
|
}
|
|
} else {
|
|
/* The merged profile has a non-zero length. Check that it is compatible
|
|
* with the data in this process. */
|
|
char *ProfileBuffer;
|
|
if (mmapProfileForMerging(File, ProfileFileSize, &ProfileBuffer) == -1) {
|
|
lprofUnlockFileHandle(File);
|
|
fclose(File);
|
|
return;
|
|
}
|
|
(void)munmap(ProfileBuffer, ProfileFileSize);
|
|
}
|
|
} else {
|
|
File = fopen(Filename, FileOpenMode);
|
|
if (!File)
|
|
return;
|
|
/* Check that the offset within the file is page-aligned. */
|
|
CurrentFileOffset = ftell(File);
|
|
unsigned PageSize = getpagesize();
|
|
if (CurrentFileOffset % PageSize != 0) {
|
|
PROF_ERR("Continuous counter sync mode is enabled, but raw profile is not"
|
|
"page-aligned. CurrentFileOffset = %" PRIu64 ", pagesz = %u.\n",
|
|
(uint64_t)CurrentFileOffset, PageSize);
|
|
return;
|
|
}
|
|
if (writeProfileWithFileObject(Filename, File) != 0) {
|
|
fclose(File);
|
|
return;
|
|
}
|
|
}
|
|
|
|
/* mmap() the profile counters so long as there is at least one counter.
|
|
* If there aren't any counters, mmap() would fail with EINVAL. */
|
|
if (CountersSize > 0)
|
|
mmapForContinuousMode(CurrentFileOffset, File);
|
|
|
|
if (doMerging()) {
|
|
lprofUnlockFileHandle(File);
|
|
fclose(File);
|
|
}
|
|
}
|
|
|
|
static const char *DefaultProfileName = "default.profraw";
|
|
static void resetFilenameToDefault(void) {
|
|
if (lprofCurFilename.FilenamePat && lprofCurFilename.OwnsFilenamePat) {
|
|
free((void *)lprofCurFilename.FilenamePat);
|
|
}
|
|
memset(&lprofCurFilename, 0, sizeof(lprofCurFilename));
|
|
lprofCurFilename.FilenamePat = DefaultProfileName;
|
|
lprofCurFilename.PNS = PNS_default;
|
|
}
|
|
|
|
static unsigned getMergePoolSize(const char *FilenamePat, int *I) {
|
|
unsigned J = 0, Num = 0;
|
|
for (;; ++J) {
|
|
char C = FilenamePat[*I + J];
|
|
if (C == 'm') {
|
|
*I += J;
|
|
return Num ? Num : 1;
|
|
}
|
|
if (C < '0' || C > '9')
|
|
break;
|
|
Num = Num * 10 + C - '0';
|
|
|
|
/* If FilenamePat[*I+J] is between '0' and '9', the next byte is guaranteed
|
|
* to be in-bound as the string is null terminated. */
|
|
}
|
|
return 0;
|
|
}
|
|
|
|
/* Assert that Idx does index past a string null terminator. Return the
|
|
* result of the check. */
|
|
static int checkBounds(int Idx, int Strlen) {
|
|
assert(Idx <= Strlen && "Indexing past string null terminator");
|
|
return Idx <= Strlen;
|
|
}
|
|
|
|
/* Parses the pattern string \p FilenamePat and stores the result to
|
|
* lprofcurFilename structure. */
|
|
static int parseFilenamePattern(const char *FilenamePat,
|
|
unsigned CopyFilenamePat) {
|
|
int NumPids = 0, NumHosts = 0, I;
|
|
char *PidChars = &lprofCurFilename.PidChars[0];
|
|
char *Hostname = &lprofCurFilename.Hostname[0];
|
|
int MergingEnabled = 0;
|
|
int FilenamePatLen = strlen(FilenamePat);
|
|
|
|
/* Clean up cached prefix and filename. */
|
|
if (lprofCurFilename.ProfilePathPrefix)
|
|
free((void *)lprofCurFilename.ProfilePathPrefix);
|
|
|
|
if (lprofCurFilename.FilenamePat && lprofCurFilename.OwnsFilenamePat) {
|
|
free((void *)lprofCurFilename.FilenamePat);
|
|
}
|
|
|
|
memset(&lprofCurFilename, 0, sizeof(lprofCurFilename));
|
|
|
|
if (!CopyFilenamePat)
|
|
lprofCurFilename.FilenamePat = FilenamePat;
|
|
else {
|
|
lprofCurFilename.FilenamePat = strdup(FilenamePat);
|
|
lprofCurFilename.OwnsFilenamePat = 1;
|
|
}
|
|
/* Check the filename for "%p", which indicates a pid-substitution. */
|
|
for (I = 0; checkBounds(I, FilenamePatLen) && FilenamePat[I]; ++I) {
|
|
if (FilenamePat[I] == '%') {
|
|
++I; /* Advance to the next character. */
|
|
if (!checkBounds(I, FilenamePatLen))
|
|
break;
|
|
if (FilenamePat[I] == 'p') {
|
|
if (!NumPids++) {
|
|
if (snprintf(PidChars, MAX_PID_SIZE, "%ld", (long)getpid()) <= 0) {
|
|
PROF_WARN("Unable to get pid for filename pattern %s. Using the "
|
|
"default name.",
|
|
FilenamePat);
|
|
return -1;
|
|
}
|
|
}
|
|
} else if (FilenamePat[I] == 'h') {
|
|
if (!NumHosts++)
|
|
if (COMPILER_RT_GETHOSTNAME(Hostname, COMPILER_RT_MAX_HOSTLEN)) {
|
|
PROF_WARN("Unable to get hostname for filename pattern %s. Using "
|
|
"the default name.",
|
|
FilenamePat);
|
|
return -1;
|
|
}
|
|
} else if (FilenamePat[I] == 't') {
|
|
lprofCurFilename.TmpDir = getenv("TMPDIR");
|
|
if (!lprofCurFilename.TmpDir) {
|
|
PROF_WARN("Unable to get the TMPDIR environment variable, referenced "
|
|
"in %s. Using the default path.",
|
|
FilenamePat);
|
|
return -1;
|
|
}
|
|
} else if (FilenamePat[I] == 'c') {
|
|
if (__llvm_profile_is_continuous_mode_enabled()) {
|
|
PROF_WARN("%%c specifier can only be specified once in %s.\n",
|
|
FilenamePat);
|
|
return -1;
|
|
}
|
|
#if defined(__APPLE__) || defined(__ELF__) || defined(_WIN32)
|
|
__llvm_profile_set_page_size(getpagesize());
|
|
__llvm_profile_enable_continuous_mode();
|
|
#else
|
|
PROF_WARN("%s", "Continous mode is currently only supported for Mach-O,"
|
|
" ELF and COFF formats.");
|
|
return -1;
|
|
#endif
|
|
} else {
|
|
unsigned MergePoolSize = getMergePoolSize(FilenamePat, &I);
|
|
if (!MergePoolSize)
|
|
continue;
|
|
if (MergingEnabled) {
|
|
PROF_WARN("%%m specifier can only be specified once in %s.\n",
|
|
FilenamePat);
|
|
return -1;
|
|
}
|
|
MergingEnabled = 1;
|
|
lprofCurFilename.MergePoolSize = MergePoolSize;
|
|
}
|
|
}
|
|
}
|
|
|
|
lprofCurFilename.NumPids = NumPids;
|
|
lprofCurFilename.NumHosts = NumHosts;
|
|
return 0;
|
|
}
|
|
|
|
static void parseAndSetFilename(const char *FilenamePat,
|
|
ProfileNameSpecifier PNS,
|
|
unsigned CopyFilenamePat) {
|
|
|
|
const char *OldFilenamePat = lprofCurFilename.FilenamePat;
|
|
ProfileNameSpecifier OldPNS = lprofCurFilename.PNS;
|
|
|
|
/* The old profile name specifier takes precedence over the old one. */
|
|
if (PNS < OldPNS)
|
|
return;
|
|
|
|
if (!FilenamePat)
|
|
FilenamePat = DefaultProfileName;
|
|
|
|
if (OldFilenamePat && !strcmp(OldFilenamePat, FilenamePat)) {
|
|
lprofCurFilename.PNS = PNS;
|
|
return;
|
|
}
|
|
|
|
/* When PNS >= OldPNS, the last one wins. */
|
|
if (!FilenamePat || parseFilenamePattern(FilenamePat, CopyFilenamePat))
|
|
resetFilenameToDefault();
|
|
lprofCurFilename.PNS = PNS;
|
|
|
|
if (!OldFilenamePat) {
|
|
if (getenv("LLVM_PROFILE_VERBOSE"))
|
|
PROF_NOTE("Set profile file path to \"%s\" via %s.\n",
|
|
lprofCurFilename.FilenamePat, getPNSStr(PNS));
|
|
} else {
|
|
if (getenv("LLVM_PROFILE_VERBOSE"))
|
|
PROF_NOTE("Override old profile path \"%s\" via %s to \"%s\" via %s.\n",
|
|
OldFilenamePat, getPNSStr(OldPNS), lprofCurFilename.FilenamePat,
|
|
getPNSStr(PNS));
|
|
}
|
|
|
|
truncateCurrentFile();
|
|
if (__llvm_profile_is_continuous_mode_enabled())
|
|
initializeProfileForContinuousMode();
|
|
}
|
|
|
|
/* Return buffer length that is required to store the current profile
|
|
* filename with PID and hostname substitutions. */
|
|
/* The length to hold uint64_t followed by 3 digits pool id including '_' */
|
|
#define SIGLEN 24
|
|
static int getCurFilenameLength(void) {
|
|
int Len;
|
|
if (!lprofCurFilename.FilenamePat || !lprofCurFilename.FilenamePat[0])
|
|
return 0;
|
|
|
|
if (!(lprofCurFilename.NumPids || lprofCurFilename.NumHosts ||
|
|
lprofCurFilename.TmpDir || lprofCurFilename.MergePoolSize))
|
|
return strlen(lprofCurFilename.FilenamePat);
|
|
|
|
Len = strlen(lprofCurFilename.FilenamePat) +
|
|
lprofCurFilename.NumPids * (strlen(lprofCurFilename.PidChars) - 2) +
|
|
lprofCurFilename.NumHosts * (strlen(lprofCurFilename.Hostname) - 2) +
|
|
(lprofCurFilename.TmpDir ? (strlen(lprofCurFilename.TmpDir) - 1) : 0);
|
|
if (lprofCurFilename.MergePoolSize)
|
|
Len += SIGLEN;
|
|
return Len;
|
|
}
|
|
|
|
/* Return the pointer to the current profile file name (after substituting
|
|
* PIDs and Hostnames in filename pattern. \p FilenameBuf is the buffer
|
|
* to store the resulting filename. If no substitution is needed, the
|
|
* current filename pattern string is directly returned, unless ForceUseBuf
|
|
* is enabled. */
|
|
static const char *getCurFilename(char *FilenameBuf, int ForceUseBuf) {
|
|
int I, J, PidLength, HostNameLength, TmpDirLength, FilenamePatLength;
|
|
const char *FilenamePat = lprofCurFilename.FilenamePat;
|
|
|
|
if (!lprofCurFilename.FilenamePat || !lprofCurFilename.FilenamePat[0])
|
|
return 0;
|
|
|
|
if (!(lprofCurFilename.NumPids || lprofCurFilename.NumHosts ||
|
|
lprofCurFilename.TmpDir || lprofCurFilename.MergePoolSize ||
|
|
__llvm_profile_is_continuous_mode_enabled())) {
|
|
if (!ForceUseBuf)
|
|
return lprofCurFilename.FilenamePat;
|
|
|
|
FilenamePatLength = strlen(lprofCurFilename.FilenamePat);
|
|
memcpy(FilenameBuf, lprofCurFilename.FilenamePat, FilenamePatLength);
|
|
FilenameBuf[FilenamePatLength] = '\0';
|
|
return FilenameBuf;
|
|
}
|
|
|
|
PidLength = strlen(lprofCurFilename.PidChars);
|
|
HostNameLength = strlen(lprofCurFilename.Hostname);
|
|
TmpDirLength = lprofCurFilename.TmpDir ? strlen(lprofCurFilename.TmpDir) : 0;
|
|
/* Construct the new filename. */
|
|
for (I = 0, J = 0; FilenamePat[I]; ++I)
|
|
if (FilenamePat[I] == '%') {
|
|
if (FilenamePat[++I] == 'p') {
|
|
memcpy(FilenameBuf + J, lprofCurFilename.PidChars, PidLength);
|
|
J += PidLength;
|
|
} else if (FilenamePat[I] == 'h') {
|
|
memcpy(FilenameBuf + J, lprofCurFilename.Hostname, HostNameLength);
|
|
J += HostNameLength;
|
|
} else if (FilenamePat[I] == 't') {
|
|
memcpy(FilenameBuf + J, lprofCurFilename.TmpDir, TmpDirLength);
|
|
FilenameBuf[J + TmpDirLength] = DIR_SEPARATOR;
|
|
J += TmpDirLength + 1;
|
|
} else {
|
|
if (!getMergePoolSize(FilenamePat, &I))
|
|
continue;
|
|
char LoadModuleSignature[SIGLEN + 1];
|
|
int S;
|
|
int ProfilePoolId = getpid() % lprofCurFilename.MergePoolSize;
|
|
S = snprintf(LoadModuleSignature, SIGLEN + 1, "%" PRIu64 "_%d",
|
|
lprofGetLoadModuleSignature(), ProfilePoolId);
|
|
if (S == -1 || S > SIGLEN)
|
|
S = SIGLEN;
|
|
memcpy(FilenameBuf + J, LoadModuleSignature, S);
|
|
J += S;
|
|
}
|
|
/* Drop any unknown substitutions. */
|
|
} else
|
|
FilenameBuf[J++] = FilenamePat[I];
|
|
FilenameBuf[J] = 0;
|
|
|
|
return FilenameBuf;
|
|
}
|
|
|
|
/* Returns the pointer to the environment variable
|
|
* string. Returns null if the env var is not set. */
|
|
static const char *getFilenamePatFromEnv(void) {
|
|
const char *Filename = getenv("LLVM_PROFILE_FILE");
|
|
if (!Filename || !Filename[0])
|
|
return 0;
|
|
return Filename;
|
|
}
|
|
|
|
COMPILER_RT_VISIBILITY
|
|
const char *__llvm_profile_get_path_prefix(void) {
|
|
int Length;
|
|
char *FilenameBuf, *Prefix;
|
|
const char *Filename, *PrefixEnd;
|
|
|
|
if (lprofCurFilename.ProfilePathPrefix)
|
|
return lprofCurFilename.ProfilePathPrefix;
|
|
|
|
Length = getCurFilenameLength();
|
|
FilenameBuf = (char *)COMPILER_RT_ALLOCA(Length + 1);
|
|
Filename = getCurFilename(FilenameBuf, 0);
|
|
if (!Filename)
|
|
return "\0";
|
|
|
|
PrefixEnd = lprofFindLastDirSeparator(Filename);
|
|
if (!PrefixEnd)
|
|
return "\0";
|
|
|
|
Length = PrefixEnd - Filename + 1;
|
|
Prefix = (char *)malloc(Length + 1);
|
|
if (!Prefix) {
|
|
PROF_ERR("Failed to %s\n", "allocate memory.");
|
|
return "\0";
|
|
}
|
|
memcpy(Prefix, Filename, Length);
|
|
Prefix[Length] = '\0';
|
|
lprofCurFilename.ProfilePathPrefix = Prefix;
|
|
return Prefix;
|
|
}
|
|
|
|
COMPILER_RT_VISIBILITY
|
|
const char *__llvm_profile_get_filename(void) {
|
|
int Length;
|
|
char *FilenameBuf;
|
|
const char *Filename;
|
|
|
|
Length = getCurFilenameLength();
|
|
FilenameBuf = (char *)malloc(Length + 1);
|
|
if (!FilenameBuf) {
|
|
PROF_ERR("Failed to %s\n", "allocate memory.");
|
|
return "\0";
|
|
}
|
|
Filename = getCurFilename(FilenameBuf, 1);
|
|
if (!Filename)
|
|
return "\0";
|
|
|
|
return FilenameBuf;
|
|
}
|
|
|
|
/* This API initializes the file handling, both user specified
|
|
* profile path via -fprofile-instr-generate= and LLVM_PROFILE_FILE
|
|
* environment variable can override this default value.
|
|
*/
|
|
COMPILER_RT_VISIBILITY
|
|
void __llvm_profile_initialize_file(void) {
|
|
const char *EnvFilenamePat;
|
|
const char *SelectedPat = NULL;
|
|
ProfileNameSpecifier PNS = PNS_unknown;
|
|
int hasCommandLineOverrider = (INSTR_PROF_PROFILE_NAME_VAR[0] != 0);
|
|
|
|
EnvFilenamePat = getFilenamePatFromEnv();
|
|
if (EnvFilenamePat) {
|
|
/* Pass CopyFilenamePat = 1, to ensure that the filename would be valid
|
|
at the moment when __llvm_profile_write_file() gets executed. */
|
|
parseAndSetFilename(EnvFilenamePat, PNS_environment, 1);
|
|
return;
|
|
} else if (hasCommandLineOverrider) {
|
|
SelectedPat = INSTR_PROF_PROFILE_NAME_VAR;
|
|
PNS = PNS_command_line;
|
|
} else {
|
|
SelectedPat = NULL;
|
|
PNS = PNS_default;
|
|
}
|
|
|
|
parseAndSetFilename(SelectedPat, PNS, 0);
|
|
}
|
|
|
|
/* This method is invoked by the runtime initialization hook
|
|
* InstrProfilingRuntime.o if it is linked in.
|
|
*/
|
|
COMPILER_RT_VISIBILITY
|
|
void __llvm_profile_initialize(void) {
|
|
__llvm_profile_initialize_file();
|
|
if (!__llvm_profile_is_continuous_mode_enabled())
|
|
__llvm_profile_register_write_file_atexit();
|
|
}
|
|
|
|
/* This API is directly called by the user application code. It has the
|
|
* highest precedence compared with LLVM_PROFILE_FILE environment variable
|
|
* and command line option -fprofile-instr-generate=<profile_name>.
|
|
*/
|
|
COMPILER_RT_VISIBILITY
|
|
void __llvm_profile_set_filename(const char *FilenamePat) {
|
|
if (__llvm_profile_is_continuous_mode_enabled())
|
|
return;
|
|
parseAndSetFilename(FilenamePat, PNS_runtime_api, 1);
|
|
}
|
|
|
|
/* The public API for writing profile data into the file with name
|
|
* set by previous calls to __llvm_profile_set_filename or
|
|
* __llvm_profile_override_default_filename or
|
|
* __llvm_profile_initialize_file. */
|
|
COMPILER_RT_VISIBILITY
|
|
int __llvm_profile_write_file(void) {
|
|
int rc, Length;
|
|
const char *Filename;
|
|
char *FilenameBuf;
|
|
int PDeathSig = 0;
|
|
|
|
if (lprofProfileDumped() || __llvm_profile_is_continuous_mode_enabled()) {
|
|
PROF_NOTE("Profile data not written to file: %s.\n", "already written");
|
|
return 0;
|
|
}
|
|
|
|
Length = getCurFilenameLength();
|
|
FilenameBuf = (char *)COMPILER_RT_ALLOCA(Length + 1);
|
|
Filename = getCurFilename(FilenameBuf, 0);
|
|
|
|
/* Check the filename. */
|
|
if (!Filename) {
|
|
PROF_ERR("Failed to write file : %s\n", "Filename not set");
|
|
return -1;
|
|
}
|
|
|
|
/* Check if there is llvm/runtime version mismatch. */
|
|
if (GET_VERSION(__llvm_profile_get_version()) != INSTR_PROF_RAW_VERSION) {
|
|
PROF_ERR("Runtime and instrumentation version mismatch : "
|
|
"expected %d, but get %d\n",
|
|
INSTR_PROF_RAW_VERSION,
|
|
(int)GET_VERSION(__llvm_profile_get_version()));
|
|
return -1;
|
|
}
|
|
|
|
// Temporarily suspend getting SIGKILL when the parent exits.
|
|
PDeathSig = lprofSuspendSigKill();
|
|
|
|
/* Write profile data to the file. */
|
|
rc = writeFile(Filename);
|
|
if (rc)
|
|
PROF_ERR("Failed to write file \"%s\": %s\n", Filename, strerror(errno));
|
|
|
|
// Restore SIGKILL.
|
|
if (PDeathSig == 1)
|
|
lprofRestoreSigKill();
|
|
|
|
return rc;
|
|
}
|
|
|
|
COMPILER_RT_VISIBILITY
|
|
int __llvm_profile_dump(void) {
|
|
if (!doMerging())
|
|
PROF_WARN("Later invocation of __llvm_profile_dump can lead to clobbering "
|
|
" of previously dumped profile data : %s. Either use %%m "
|
|
"in profile name or change profile name before dumping.\n",
|
|
"online profile merging is not on");
|
|
int rc = __llvm_profile_write_file();
|
|
lprofSetProfileDumped(1);
|
|
return rc;
|
|
}
|
|
|
|
/* Order file data will be saved in a file with suffx .order. */
|
|
static const char *OrderFileSuffix = ".order";
|
|
|
|
COMPILER_RT_VISIBILITY
|
|
int __llvm_orderfile_write_file(void) {
|
|
int rc, Length, LengthBeforeAppend, SuffixLength;
|
|
const char *Filename;
|
|
char *FilenameBuf;
|
|
int PDeathSig = 0;
|
|
|
|
SuffixLength = strlen(OrderFileSuffix);
|
|
Length = getCurFilenameLength() + SuffixLength;
|
|
FilenameBuf = (char *)COMPILER_RT_ALLOCA(Length + 1);
|
|
Filename = getCurFilename(FilenameBuf, 1);
|
|
|
|
/* Check the filename. */
|
|
if (!Filename) {
|
|
PROF_ERR("Failed to write file : %s\n", "Filename not set");
|
|
return -1;
|
|
}
|
|
|
|
/* Append order file suffix */
|
|
LengthBeforeAppend = strlen(Filename);
|
|
memcpy(FilenameBuf + LengthBeforeAppend, OrderFileSuffix, SuffixLength);
|
|
FilenameBuf[LengthBeforeAppend + SuffixLength] = '\0';
|
|
|
|
/* Check if there is llvm/runtime version mismatch. */
|
|
if (GET_VERSION(__llvm_profile_get_version()) != INSTR_PROF_RAW_VERSION) {
|
|
PROF_ERR("Runtime and instrumentation version mismatch : "
|
|
"expected %d, but get %d\n",
|
|
INSTR_PROF_RAW_VERSION,
|
|
(int)GET_VERSION(__llvm_profile_get_version()));
|
|
return -1;
|
|
}
|
|
|
|
// Temporarily suspend getting SIGKILL when the parent exits.
|
|
PDeathSig = lprofSuspendSigKill();
|
|
|
|
/* Write order data to the file. */
|
|
rc = writeOrderFile(Filename);
|
|
if (rc)
|
|
PROF_ERR("Failed to write file \"%s\": %s\n", Filename, strerror(errno));
|
|
|
|
// Restore SIGKILL.
|
|
if (PDeathSig == 1)
|
|
lprofRestoreSigKill();
|
|
|
|
return rc;
|
|
}
|
|
|
|
COMPILER_RT_VISIBILITY
|
|
int __llvm_orderfile_dump(void) {
|
|
int rc = __llvm_orderfile_write_file();
|
|
return rc;
|
|
}
|
|
|
|
static void writeFileWithoutReturn(void) { __llvm_profile_write_file(); }
|
|
|
|
COMPILER_RT_VISIBILITY
|
|
int __llvm_profile_register_write_file_atexit(void) {
|
|
static int HasBeenRegistered = 0;
|
|
|
|
if (HasBeenRegistered)
|
|
return 0;
|
|
|
|
lprofSetupValueProfiler();
|
|
|
|
HasBeenRegistered = 1;
|
|
return atexit(writeFileWithoutReturn);
|
|
}
|
|
|
|
COMPILER_RT_VISIBILITY int __llvm_profile_set_file_object(FILE *File,
|
|
int EnableMerge) {
|
|
if (__llvm_profile_is_continuous_mode_enabled()) {
|
|
if (!EnableMerge) {
|
|
PROF_WARN("__llvm_profile_set_file_object(fd=%d) not supported in "
|
|
"continuous sync mode when merging is disabled\n",
|
|
fileno(File));
|
|
return 1;
|
|
}
|
|
if (lprofLockFileHandle(File) != 0) {
|
|
PROF_WARN("Data may be corrupted during profile merging : %s\n",
|
|
"Fail to obtain file lock due to system limit.");
|
|
}
|
|
uint64_t ProfileFileSize = 0;
|
|
if (getProfileFileSizeForMerging(File, &ProfileFileSize) == -1) {
|
|
lprofUnlockFileHandle(File);
|
|
return 1;
|
|
}
|
|
if (ProfileFileSize == 0) {
|
|
FreeHook = &free;
|
|
setupIOBuffer();
|
|
ProfDataWriter fileWriter;
|
|
initFileWriter(&fileWriter, File);
|
|
if (lprofWriteData(&fileWriter, 0, 0)) {
|
|
lprofUnlockFileHandle(File);
|
|
PROF_ERR("Failed to write file \"%d\": %s\n", fileno(File),
|
|
strerror(errno));
|
|
return 1;
|
|
}
|
|
fflush(File);
|
|
} else {
|
|
/* The merged profile has a non-zero length. Check that it is compatible
|
|
* with the data in this process. */
|
|
char *ProfileBuffer;
|
|
if (mmapProfileForMerging(File, ProfileFileSize, &ProfileBuffer) == -1) {
|
|
lprofUnlockFileHandle(File);
|
|
return 1;
|
|
}
|
|
(void)munmap(ProfileBuffer, ProfileFileSize);
|
|
}
|
|
mmapForContinuousMode(0, File);
|
|
lprofUnlockFileHandle(File);
|
|
} else {
|
|
setProfileFile(File);
|
|
setProfileMergeRequested(EnableMerge);
|
|
}
|
|
return 0;
|
|
}
|
|
|
|
#endif
|