[PGO] Enable building compiler-rt profile support library on Windows
Summary: This change configures Windows builds to build the complier-rt profile support library (clang_rt.profile-i386.lib). Windows API incompatibilities in the compiler-rt profile lib are also fixed. Reviewers: davidxl, dnovillo Subscribers: llvm-commits Differential Revision: http://reviews.llvm.org/D15830 llvm-svn: 256848
This commit is contained in:
Nathan Slingerland
parent
a7d7f7cf33
commit
ba86c9279b
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@ -559,7 +559,7 @@ else()
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endif()
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if (PROFILE_SUPPORTED_ARCH AND
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OS_NAME MATCHES "Darwin|Linux|FreeBSD")
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OS_NAME MATCHES "Darwin|Linux|FreeBSD|Windows")
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set(COMPILER_RT_HAS_PROFILE TRUE)
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else()
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set(COMPILER_RT_HAS_PROFILE FALSE)
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@ -35,7 +35,8 @@ set(PROFILE_SOURCES
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InstrProfilingPlatformLinux.c
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InstrProfilingPlatformOther.c
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InstrProfilingRuntime.cc
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InstrProfilingUtil.c)
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InstrProfilingUtil.c
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WindowsMMap.c)
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if(UNIX)
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set(EXTRA_FLAGS
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@ -27,8 +27,13 @@
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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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#if defined(_WIN32)
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#include "WindowsMMap.h"
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#else
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#include <sys/mman.h>
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#include <sys/file.h>
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#endif
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#define I386_FREEBSD (defined(__FreeBSD__) && defined(__i386__))
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@ -37,6 +42,7 @@
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#endif
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#if defined(_MSC_VER)
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typedef unsigned char uint8_t;
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typedef unsigned int uint32_t;
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typedef unsigned long long uint64_t;
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#elif I386_FREEBSD
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@ -17,6 +17,10 @@
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#define UNCONST(ptr) ((void *)(uintptr_t)(ptr))
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#ifdef _MSC_VER
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#define snprintf _snprintf
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#endif
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/* Return 1 if there is an error, otherwise return 0. */
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static uint32_t fileWriter(ProfDataIOVec *IOVecs, uint32_t NumIOVecs,
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void **WriterCtx) {
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@ -0,0 +1,128 @@
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/*
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* This code is derived from uClibc (original license follows).
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* https://git.uclibc.org/uClibc/tree/utils/mmap-windows.c
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*/
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/* mmap() replacement for Windows
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*
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* Author: Mike Frysinger <vapier@gentoo.org>
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* Placed into the public domain
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*/
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/* References:
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* CreateFileMapping: http://msdn.microsoft.com/en-us/library/aa366537(VS.85).aspx
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* CloseHandle: http://msdn.microsoft.com/en-us/library/ms724211(VS.85).aspx
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* MapViewOfFile: http://msdn.microsoft.com/en-us/library/aa366761(VS.85).aspx
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* UnmapViewOfFile: http://msdn.microsoft.com/en-us/library/aa366882(VS.85).aspx
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*/
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#if defined(_WIN32)
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#include "WindowsMMap.h"
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#include "InstrProfiling.h"
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#ifdef __USE_FILE_OFFSET64
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# define DWORD_HI(x) (x >> 32)
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# define DWORD_LO(x) ((x) & 0xffffffff)
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#else
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# define DWORD_HI(x) (0)
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# define DWORD_LO(x) (x)
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#endif
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COMPILER_RT_VISIBILITY
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void *mmap(void *start, size_t length, int prot, int flags, int fd, off_t offset)
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{
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if (prot & ~(PROT_READ | PROT_WRITE | PROT_EXEC))
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return MAP_FAILED;
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if (fd == -1) {
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if (!(flags & MAP_ANON) || offset)
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return MAP_FAILED;
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} else if (flags & MAP_ANON)
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return MAP_FAILED;
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DWORD flProtect;
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if (prot & PROT_WRITE) {
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if (prot & PROT_EXEC)
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flProtect = PAGE_EXECUTE_READWRITE;
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else
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flProtect = PAGE_READWRITE;
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} else if (prot & PROT_EXEC) {
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if (prot & PROT_READ)
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flProtect = PAGE_EXECUTE_READ;
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else if (prot & PROT_EXEC)
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flProtect = PAGE_EXECUTE;
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} else
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flProtect = PAGE_READONLY;
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off_t end = length + offset;
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HANDLE mmap_fd, h;
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if (fd == -1)
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mmap_fd = INVALID_HANDLE_VALUE;
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else
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mmap_fd = (HANDLE)_get_osfhandle(fd);
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h = CreateFileMapping(mmap_fd, NULL, flProtect, DWORD_HI(end), DWORD_LO(end), NULL);
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if (h == NULL)
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return MAP_FAILED;
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DWORD dwDesiredAccess;
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if (prot & PROT_WRITE)
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dwDesiredAccess = FILE_MAP_WRITE;
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else
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dwDesiredAccess = FILE_MAP_READ;
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if (prot & PROT_EXEC)
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dwDesiredAccess |= FILE_MAP_EXECUTE;
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if (flags & MAP_PRIVATE)
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dwDesiredAccess |= FILE_MAP_COPY;
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void *ret = MapViewOfFile(h, dwDesiredAccess, DWORD_HI(offset), DWORD_LO(offset), length);
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if (ret == NULL) {
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CloseHandle(h);
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ret = MAP_FAILED;
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}
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return ret;
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}
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COMPILER_RT_VISIBILITY
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void munmap(void *addr, size_t length)
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{
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UnmapViewOfFile(addr);
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/* ruh-ro, we leaked handle from CreateFileMapping() ... */
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}
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COMPILER_RT_VISIBILITY
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int msync(void *addr, size_t length, int flags)
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{
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if (flags & MS_INVALIDATE)
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return -1; /* Not supported. */
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/* Exactly one of MS_ASYNC or MS_SYNC must be specified. */
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switch (flags & (MS_ASYNC | MS_SYNC)) {
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case MS_SYNC:
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case MS_ASYNC:
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break;
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default:
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return -1;
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}
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if (!FlushViewOfFile(addr, length))
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return -1;
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if (flags & MS_SYNC) {
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/* FIXME: No longer have access to handle from CreateFileMapping(). */
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/*
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* if (!FlushFileBuffers(h))
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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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COMPILER_RT_VISIBILITY
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int flock(int fd, int operation)
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{
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return -1; /* Not supported. */
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}
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#undef DWORD_HI
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#undef DWORD_LO
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#endif /* _WIN32 */
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@ -0,0 +1,65 @@
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/*===- WindowsMMap.h - Support library for PGO instrumentation ------------===*\
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|*
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|* The LLVM Compiler Infrastructure
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|*
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|* This file is distributed under the University of Illinois Open Source
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|* License. See LICENSE.TXT for details.
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|*
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\*===----------------------------------------------------------------------===*/
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#ifndef PROFILE_INSTRPROFILING_WINDOWS_MMAP_H
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#define PROFILE_INSTRPROFILING_WINDOWS_MMAP_H
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#if defined(_WIN32)
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#include <BaseTsd.h>
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#include <io.h>
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#include <sys/types.h>
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/*
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* mmap() flags
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*/
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#define PROT_READ 0x1
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#define PROT_WRITE 0x2
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/* This flag is only available in WinXP+ */
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#ifdef FILE_MAP_EXECUTE
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#define PROT_EXEC 0x4
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#else
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#define PROT_EXEC 0x0
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#define FILE_MAP_EXECUTE 0
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#endif
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#define MAP_FILE 0x00
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#define MAP_SHARED 0x01
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#define MAP_PRIVATE 0x02
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#define MAP_ANONYMOUS 0x20
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#define MAP_ANON MAP_ANONYMOUS
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#define MAP_FAILED ((void *) -1)
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/*
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* msync() flags
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*/
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#define MS_ASYNC 0x0001 /* return immediately */
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#define MS_INVALIDATE 0x0002 /* invalidate all cached data */
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#define MS_SYNC 0x0010 /* msync synchronously */
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/*
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* flock() operations
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*/
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#define LOCK_SH 1 /* shared lock */
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#define LOCK_EX 2 /* exclusive lock */
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#define LOCK_NB 4 /* don't block when locking */
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#define LOCK_UN 8 /* unlock */
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void *mmap(void *start, size_t length, int prot, int flags, int fd,
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off_t offset);
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void munmap(void *addr, size_t length);
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int msync(void *addr, size_t length, int flags);
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int flock(int fd, int operation);
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#endif /* _WIN32 */
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#endif /* PROFILE_INSTRPROFILING_WINDOWS_MMAP_H */
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