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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>
73 lines
2.7 KiB
C
73 lines
2.7 KiB
C
// UNSUPPORTED: target={{.*windows.*}}
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// The sanitizer-windows bot is saying:
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// instrprof-write-buffer-internal.c.tmp.buf.profraw: Invalid instrumentation profile data (file header is corrupt)
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// RUN: rm -f %t.buf.profraw %t.profraw
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// RUN: %clang_profgen -w -o %t %s
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// RUN: env LLVM_PROFILE_FILE=%t.profraw %run %t %t.buf.profraw
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// RUN: llvm-profdata show %t.buf.profraw | FileCheck %s -check-prefix=WRITE-BUFFER
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// RUN: not llvm-profdata show %t.profraw 2>&1 | FileCheck %s -check-prefix=ALREADY-DUMPED
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// WRITE-BUFFER: Instrumentation level: Front-end
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// WRITE-BUFFER: Total functions: 1
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// WRITE-BUFFER: Maximum function count: 1
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// WRITE-BUFFER: Maximum internal block count: 0
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// ALREADY-DUMPED: error: {{.+}}: empty raw profile file
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#include <stdint.h>
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#include <stdio.h>
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#include <stdlib.h>
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const void *__llvm_profile_begin_data(void);
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const void *__llvm_profile_end_data(void);
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const char *__llvm_profile_begin_names(void);
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const char *__llvm_profile_end_names(void);
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char *__llvm_profile_begin_counters(void);
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char *__llvm_profile_end_counters(void);
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char *__llvm_profile_begin_bitmap(void);
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char *__llvm_profile_end_bitmap(void);
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uint64_t __llvm_profile_get_size_for_buffer_internal(
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const void *DataBegin, const void *DataEnd, const char *CountersBegin,
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const char *CountersEnd, const char *BitmapBegin, const char *BitmapEnd,
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const char *NamesBegin, const char *NamesEnd, const void *VTableBegin,
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const void *VTableEnd, const char *VNamesBegin, const char *VNamesEnd);
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int __llvm_profile_write_buffer_internal(
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char *Buffer, const void *DataBegin, const void *DataEnd,
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const char *CountersBegin, const char *CountersEnd, const char *BitmapBegin,
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const char *BitmapEnd, const char *NamesBegin, const char *NamesEnd);
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void __llvm_profile_set_dumped(void);
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int main(int argc, const char *argv[]) {
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uint64_t bufsize = __llvm_profile_get_size_for_buffer_internal(
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__llvm_profile_begin_data(), __llvm_profile_end_data(),
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__llvm_profile_begin_counters(), __llvm_profile_end_counters(),
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__llvm_profile_begin_bitmap(), __llvm_profile_end_bitmap(),
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__llvm_profile_begin_names(), __llvm_profile_end_names(), NULL, NULL,
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NULL, NULL);
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char *buf = malloc(bufsize);
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int ret = __llvm_profile_write_buffer_internal(
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buf, __llvm_profile_begin_data(), __llvm_profile_end_data(),
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__llvm_profile_begin_counters(), __llvm_profile_end_counters(),
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__llvm_profile_begin_bitmap(), __llvm_profile_end_bitmap(),
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__llvm_profile_begin_names(), __llvm_profile_end_names());
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if (ret != 0) {
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fprintf(stderr, "failed to write buffer");
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return ret;
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}
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FILE *f = fopen(argv[1], "w");
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fwrite(buf, bufsize, 1, f);
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fclose(f);
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free(buf);
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__llvm_profile_set_dumped();
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return 0;
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}
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