d4efc3e097
Currently, WebAssembly/WASI target does not provide direct support for
code coverage.
This patch set fixes several issues to unlock the feature. The main
changes are:
1. Port `compiler-rt/lib/profile` to WebAssembly/WASI.
2. Adjust profile metadata sections for Wasm object file format.
- [CodeGen] Emit `__llvm_covmap` and `__llvm_covfun` as custom sections
instead of data segments.
- [lld] Align the interval space of custom sections at link time.
- [llvm-cov] Copy misaligned custom section data if the start address is
not aligned.
- [llvm-cov] Read `__llvm_prf_names` from data segments
3. [clang] Link with profile runtime libraries if requested
See each commit message for more details and rationale.
This is part of the effort to add code coverage support in Wasm target
of Swift toolchain.
153 lines
5.2 KiB
C
153 lines
5.2 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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#define COMPILER_RT_USED
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#elif __GNUC__
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#ifdef _WIN32
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#define COMPILER_RT_FTRUNCATE(f, l) _chsize(fileno(f), l)
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#define COMPILER_RT_VISIBILITY
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#define COMPILER_RT_WEAK __attribute__((selectany))
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#else
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#define COMPILER_RT_FTRUNCATE(f, l) ftruncate(fileno(f), l)
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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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#endif
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#define COMPILER_RT_ALIGNAS(x) __attribute__((aligned(x)))
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#define COMPILER_RT_ALLOCA __builtin_alloca
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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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#define COMPILER_RT_USED __attribute__((used))
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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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#if defined(__ORBIS__) || defined(__wasi__)
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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 _WIN32
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#include <windows.h>
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#if defined(_MSC_VER) && _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(_WIN32) */
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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(void) {
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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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