16e74fd489
New change on top of [reviewed patch](https://github.com/llvm/llvm-project/pull/81691) are [in commits after this one](d0757f46b3). Previous commits are restored from the remote branch with timestamps. 1. Fix build breakage for non-ELF platforms, by defining the missing functions {`__llvm_profile_begin_vtables`, `__llvm_profile_end_vtables`, `__llvm_profile_begin_vtabnames `, `__llvm_profile_end_vtabnames`} everywhere. * Tested on mac laptop (for darwins) and Windows. Specifically, functions in `InstrProfilingPlatformWindows.c` returns `NULL` to make it more explicit that type prof isn't supported; see comments for the reason. * For the rest (AIX, other), mostly follow existing examples (like this [one](f95b2f1acf)) 2. Rename `__llvm_prf_vtabnames` -> `__llvm_prf_vns` for shorter section name, and make returned pointers [const](a825d2a4ec (diff-4de780ce726d76b7abc9d3353aef95013e7b21e7bda01be8940cc6574fb0b5ffR120-R121)) **Original Description** * Raw profile format - Header: records the byte size of compressed vtable names, and the number of profiled vtable entries (call it `VTableProfData`). Header also records padded bytes of each section. - Payload: adds a section for compressed vtable names, and a section to store `VTableProfData`. Both sections are padded so the size is a multiple of 8. * Indexed profile format - Header: records the byte offset of compressed vtable names. - Payload: adds a section to store compressed vtable names. This section is used by `llvm-profdata` to show the list of vtables profiled for an instrumented site. [The originally reviewed patch](https://github.com/llvm/llvm-project/pull/66825) will have profile reader/write change and llvm-profdata change. - To ensure this PR has all the necessary profile format change along with profile version bump, created a copy of the originally reviewed patch in https://github.com/llvm/llvm-project/pull/80761. The copy doesn't have profile format change, but it has the set of tests which covers type profile generation, profile read and profile merge. Tests pass there. rfc in https://discourse.llvm.org/t/rfc-dynamic-type-profiling-and-optimizations-in-llvm/74600 --------- Co-authored-by: modiking <modiking213@gmail.com>
108 lines
3.9 KiB
C
108 lines
3.9 KiB
C
/*===- InstrProfilingPlatformDarwin.c - Profile data on Darwin ------------===*\
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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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// Note: This is linked into the Darwin kernel, and must remain compatible
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// with freestanding compilation. See `darwin_add_builtin_libraries`.
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#include "InstrProfiling.h"
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#include "InstrProfilingInternal.h"
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#if defined(__APPLE__)
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/* Use linker magic to find the bounds of the Data section. */
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COMPILER_RT_VISIBILITY
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extern __llvm_profile_data
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DataStart __asm("section$start$__DATA$" INSTR_PROF_DATA_SECT_NAME);
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COMPILER_RT_VISIBILITY
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extern __llvm_profile_data
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DataEnd __asm("section$end$__DATA$" INSTR_PROF_DATA_SECT_NAME);
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COMPILER_RT_VISIBILITY
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extern char
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NamesStart __asm("section$start$__DATA$" INSTR_PROF_NAME_SECT_NAME);
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COMPILER_RT_VISIBILITY
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extern char NamesEnd __asm("section$end$__DATA$" INSTR_PROF_NAME_SECT_NAME);
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COMPILER_RT_VISIBILITY
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extern char
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CountersStart __asm("section$start$__DATA$" INSTR_PROF_CNTS_SECT_NAME);
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COMPILER_RT_VISIBILITY
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extern char CountersEnd __asm("section$end$__DATA$" INSTR_PROF_CNTS_SECT_NAME);
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COMPILER_RT_VISIBILITY
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extern char
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BitmapStart __asm("section$start$__DATA$" INSTR_PROF_BITS_SECT_NAME);
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COMPILER_RT_VISIBILITY
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extern char BitmapEnd __asm("section$end$__DATA$" INSTR_PROF_BITS_SECT_NAME);
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COMPILER_RT_VISIBILITY
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extern VTableProfData
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VTableProfStart __asm("section$start$__DATA$" INSTR_PROF_VTAB_SECT_NAME);
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COMPILER_RT_VISIBILITY
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extern VTableProfData
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VTableProfEnd __asm("section$end$__DATA$" INSTR_PROF_VTAB_SECT_NAME);
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COMPILER_RT_VISIBILITY
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extern char
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VNameStart __asm("section$start$__DATA$" INSTR_PROF_VNAME_SECT_NAME);
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COMPILER_RT_VISIBILITY
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extern char VNameEnd __asm("section$end$__DATA$" INSTR_PROF_VNAME_SECT_NAME);
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COMPILER_RT_VISIBILITY
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extern uint32_t
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OrderFileStart __asm("section$start$__DATA$" INSTR_PROF_ORDERFILE_SECT_NAME);
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COMPILER_RT_VISIBILITY
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extern ValueProfNode
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VNodesStart __asm("section$start$__DATA$" INSTR_PROF_VNODES_SECT_NAME);
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COMPILER_RT_VISIBILITY
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extern ValueProfNode
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VNodesEnd __asm("section$end$__DATA$" INSTR_PROF_VNODES_SECT_NAME);
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COMPILER_RT_VISIBILITY
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const __llvm_profile_data *__llvm_profile_begin_data(void) {
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return &DataStart;
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}
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COMPILER_RT_VISIBILITY
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const __llvm_profile_data *__llvm_profile_end_data(void) { return &DataEnd; }
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COMPILER_RT_VISIBILITY
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const char *__llvm_profile_begin_names(void) { return &NamesStart; }
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COMPILER_RT_VISIBILITY
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const char *__llvm_profile_end_names(void) { return &NamesEnd; }
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COMPILER_RT_VISIBILITY
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char *__llvm_profile_begin_counters(void) { return &CountersStart; }
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COMPILER_RT_VISIBILITY
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char *__llvm_profile_end_counters(void) { return &CountersEnd; }
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COMPILER_RT_VISIBILITY
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char *__llvm_profile_begin_bitmap(void) { return &BitmapStart; }
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COMPILER_RT_VISIBILITY
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char *__llvm_profile_end_bitmap(void) { return &BitmapEnd; }
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COMPILER_RT_VISIBILITY
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const VTableProfData *__llvm_profile_begin_vtables(void) {
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return &VTableProfStart;
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}
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COMPILER_RT_VISIBILITY
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const VTableProfData *__llvm_profile_end_vtables(void) {
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return &VTableProfEnd;
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}
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COMPILER_RT_VISIBILITY
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const char *__llvm_profile_begin_vtabnames(void) { return &VNameStart; }
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COMPILER_RT_VISIBILITY
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const char *__llvm_profile_end_vtabnames(void) { return &VNameEnd; }
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COMPILER_RT_VISIBILITY
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uint32_t *__llvm_profile_begin_orderfile(void) { return &OrderFileStart; }
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COMPILER_RT_VISIBILITY
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ValueProfNode *__llvm_profile_begin_vnodes(void) {
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return &VNodesStart;
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}
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COMPILER_RT_VISIBILITY
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ValueProfNode *__llvm_profile_end_vnodes(void) { return &VNodesEnd; }
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COMPILER_RT_VISIBILITY ValueProfNode *CurrentVNode = &VNodesStart;
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COMPILER_RT_VISIBILITY ValueProfNode *EndVNode = &VNodesEnd;
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COMPILER_RT_VISIBILITY int __llvm_write_binary_ids(ProfDataWriter *Writer) {
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return 0;
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}
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#endif
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