8b6af00173
Summary: The llvm-cov tool needs to be able to find coverage names in the executable, so the .lprfn and .lcovmap sections cannot be merged into .rdata. Also, the linker merges .lprfn$M into .lprfn, so llvm-cov needs to handle that when looking up sections. It has to support running on both relocatable object files and linked PE files. Lastly, when loading .lprfn from a PE file, llvm-cov needs to skip the leading zero byte added by the profile runtime. Reviewers: vsk Subscribers: hiraditya, #sanitizers, llvm-commits Tags: #sanitizers, #llvm Differential Revision: https://reviews.llvm.org/D58661 llvm-svn: 354840
66 lines
2.3 KiB
C
66 lines
2.3 KiB
C
/*===- InstrProfilingPlatformWindows.c - Profile data on Windows ----------===*\
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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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#include "InstrProfiling.h"
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#if defined(_WIN32)
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#if defined(_MSC_VER)
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/* Merge read-write sections into .data. */
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#pragma comment(linker, "/MERGE:.lprfc=.data")
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#pragma comment(linker, "/MERGE:.lprfd=.data")
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#pragma comment(linker, "/MERGE:.lprfv=.data")
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#pragma comment(linker, "/MERGE:.lprfnd=.data")
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/* Do *NOT* merge .lprfn and .lcovmap into .rdata. llvm-cov must be able to find
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* after the fact.
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*/
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/* Allocate read-only section bounds. */
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#pragma section(".lprfn$A", read)
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#pragma section(".lprfn$Z", read)
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/* Allocate read-write section bounds. */
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#pragma section(".lprfd$A", read, write)
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#pragma section(".lprfd$Z", read, write)
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#pragma section(".lprfc$A", read, write)
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#pragma section(".lprfc$Z", read, write)
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#pragma section(".lprfnd$A", read, write)
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#pragma section(".lprfnd$Z", read, write)
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#endif
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__llvm_profile_data COMPILER_RT_SECTION(".lprfd$A") DataStart = {0};
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__llvm_profile_data COMPILER_RT_SECTION(".lprfd$Z") DataEnd = {0};
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const char COMPILER_RT_SECTION(".lprfn$A") NamesStart = '\0';
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const char COMPILER_RT_SECTION(".lprfn$Z") NamesEnd = '\0';
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uint64_t COMPILER_RT_SECTION(".lprfc$A") CountersStart;
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uint64_t COMPILER_RT_SECTION(".lprfc$Z") CountersEnd;
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ValueProfNode COMPILER_RT_SECTION(".lprfnd$A") VNodesStart;
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ValueProfNode COMPILER_RT_SECTION(".lprfnd$Z") VNodesEnd;
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const __llvm_profile_data *__llvm_profile_begin_data(void) {
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return &DataStart + 1;
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}
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const __llvm_profile_data *__llvm_profile_end_data(void) { return &DataEnd; }
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const char *__llvm_profile_begin_names(void) { return &NamesStart + 1; }
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const char *__llvm_profile_end_names(void) { return &NamesEnd; }
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uint64_t *__llvm_profile_begin_counters(void) { return &CountersStart + 1; }
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uint64_t *__llvm_profile_end_counters(void) { return &CountersEnd; }
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ValueProfNode *__llvm_profile_begin_vnodes(void) { return &VNodesStart + 1; }
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ValueProfNode *__llvm_profile_end_vnodes(void) { return &VNodesEnd; }
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ValueProfNode *CurrentVNode = &VNodesStart + 1;
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ValueProfNode *EndVNode = &VNodesEnd;
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#endif
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