1 /*===- InstrProfilingPlatformWindows.c - Profile data on Windows ----------===*\ 2 |* 3 |* Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions. 4 |* See https://llvm.org/LICENSE.txt for license information. 5 |* SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception 6 |* 7 \*===----------------------------------------------------------------------===*/ 8 9 #include "InstrProfiling.h" 10 #include "InstrProfilingInternal.h" 11 12 #if defined(_WIN32) 13 14 #if defined(_MSC_VER) 15 /* Merge read-write sections into .data. */ 16 #pragma comment(linker, "/MERGE:.lprfb=.data") 17 #pragma comment(linker, "/MERGE:.lprfd=.data") 18 #pragma comment(linker, "/MERGE:.lprfv=.data") 19 #pragma comment(linker, "/MERGE:.lprfnd=.data") 20 /* Do *NOT* merge .lprfn and .lcovmap into .rdata. llvm-cov must be able to find 21 * after the fact. 22 * Do *NOT* merge .lprfc .rdata. When binary profile correlation is enabled, 23 * llvm-cov must be able to find after the fact. 24 */ 25 26 /* Allocate read-only section bounds. */ 27 #pragma section(".lprfn$A", read) 28 #pragma section(".lprfn$Z", read) 29 30 /* Allocate read-write section bounds. */ 31 #pragma section(".lprfd$A", read, write) 32 #pragma section(".lprfd$Z", read, write) 33 #pragma section(".lprfc$A", read, write) 34 #pragma section(".lprfc$Z", read, write) 35 #pragma section(".lprfb$A", read, write) 36 #pragma section(".lprfb$Z", read, write) 37 #pragma section(".lorderfile$A", read, write) 38 #pragma section(".lprfnd$A", read, write) 39 #pragma section(".lprfnd$Z", read, write) 40 #endif 41 42 __llvm_profile_data COMPILER_RT_SECTION(".lprfd$A") DataStart = {0}; 43 __llvm_profile_data COMPILER_RT_SECTION(".lprfd$Z") DataEnd = {0}; 44 45 const char COMPILER_RT_SECTION(".lprfn$A") NamesStart = '\0'; 46 const char COMPILER_RT_SECTION(".lprfn$Z") NamesEnd = '\0'; 47 48 char COMPILER_RT_SECTION(".lprfc$A") CountersStart; 49 char COMPILER_RT_SECTION(".lprfc$Z") CountersEnd; 50 char COMPILER_RT_SECTION(".lprfb$A") BitmapStart; 51 char COMPILER_RT_SECTION(".lprfb$Z") BitmapEnd; 52 uint32_t COMPILER_RT_SECTION(".lorderfile$A") OrderFileStart; 53 54 ValueProfNode COMPILER_RT_SECTION(".lprfnd$A") VNodesStart; 55 ValueProfNode COMPILER_RT_SECTION(".lprfnd$Z") VNodesEnd; 56 57 const __llvm_profile_data *__llvm_profile_begin_data(void) { 58 return &DataStart + 1; 59 } 60 const __llvm_profile_data *__llvm_profile_end_data(void) { return &DataEnd; } 61 62 const char *__llvm_profile_begin_names(void) { return &NamesStart + 1; } 63 const char *__llvm_profile_end_names(void) { return &NamesEnd; } 64 65 char *__llvm_profile_begin_counters(void) { return &CountersStart + 1; } 66 char *__llvm_profile_end_counters(void) { return &CountersEnd; } 67 char *__llvm_profile_begin_bitmap(void) { return &BitmapStart + 1; } 68 char *__llvm_profile_end_bitmap(void) { return &BitmapEnd; } 69 uint32_t *__llvm_profile_begin_orderfile(void) { return &OrderFileStart; } 70 71 ValueProfNode *__llvm_profile_begin_vnodes(void) { return &VNodesStart + 1; } 72 ValueProfNode *__llvm_profile_end_vnodes(void) { return &VNodesEnd; } 73 74 ValueProfNode *CurrentVNode = &VNodesStart + 1; 75 ValueProfNode *EndVNode = &VNodesEnd; 76 77 /* lld-link provides __buildid symbol which ponits to the 16 bytes build id when 78 * using /build-id flag. https://lld.llvm.org/windows_support.html#lld-flags */ 79 #define BUILD_ID_LEN 16 80 COMPILER_RT_WEAK extern uint8_t __buildid[BUILD_ID_LEN]; 81 COMPILER_RT_VISIBILITY int __llvm_write_binary_ids(ProfDataWriter *Writer) { 82 if (*__buildid) { 83 if (Writer && 84 lprofWriteOneBinaryId(Writer, BUILD_ID_LEN, __buildid, 0) == -1) 85 return -1; 86 return sizeof(uint64_t) + BUILD_ID_LEN; 87 } 88 return 0; 89 } 90 91 #endif 92