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Simplify ftrace_hook()

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We now have a test to prove that its transitive closure doesn't perform
floating point computations.
This commit is contained in:
Justine Tunney 2023-06-06 11:10:38 -07:00
parent 61b9677c05
commit b6182db813
No known key found for this signature in database
GPG key ID: BE714B4575D6E328
11 changed files with 142 additions and 85 deletions
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1
libc/integral/c.inc
View file

@ -446,6 +446,7 @@ typedef struct {
#endif
#ifndef optimizespeed
/* warning: corrupts frame pointer; only use on leaf functions */
#if !defined(__STRICT_ANSI__) && \
((__GNUC__ + 0) * 100 + (__GNUC_MINOR__ + 0) >= 407 || \
__has_attribute(__optimize__))

24
libc/runtime/ftrace-hook.S
View file

@ -27,16 +27,6 @@ ftrace_hook:
ret
1: push %rbp
mov %rsp,%rbp
and $-16,%rsp
sub $0x80,%rsp
movaps %xmm0,0x00(%rsp)
movaps %xmm1,0x10(%rsp)
movaps %xmm2,0x20(%rsp)
movaps %xmm3,0x30(%rsp)
movaps %xmm4,0x40(%rsp)
movaps %xmm5,0x50(%rsp)
movaps %xmm6,0x60(%rsp)
movaps %xmm7,0x70(%rsp)
push %rax
push %rax
push %rdi
@ -45,11 +35,7 @@ ftrace_hook:
push %rcx
push %r8
push %r9
push %r10
push %r11
call ftracer
pop %r11
pop %r10
pop %r9
pop %r8
pop %rcx
@ -58,15 +44,7 @@ ftrace_hook:
pop %rdi
pop %rax
pop %rax
movaps 0x00(%rsp),%xmm0
movaps 0x10(%rsp),%xmm1
movaps 0x20(%rsp),%xmm2
movaps 0x30(%rsp),%xmm3
movaps 0x40(%rsp),%xmm4
movaps 0x50(%rsp),%xmm5
movaps 0x60(%rsp),%xmm6
movaps 0x70(%rsp),%xmm7
leave
pop %rbp
ret
#elif defined(__aarch64__)

45
test/libc/runtime/ftrace_test.c Normal file
View file

@ -0,0 +1,45 @@
/*-*- mode:c;indent-tabs-mode:nil;c-basic-offset:2;tab-width:8;coding:utf-8 -*-│
│vi: set net ft=c ts=2 sts=2 sw=2 fenc=utf-8 :vi│
╞══════════════════════════════════════════════════════════════════════════════╡
│ Copyright 2023 Justine Alexandra Roberts Tunney │
│ │
│ Permission to use, copy, modify, and/or distribute this software for │
│ any purpose with or without fee is hereby granted, provided that the │
│ above copyright notice and this permission notice appear in all copies. │
│ │
│ THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL │
│ WARRANTIES WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED │
│ WARRANTIES OF MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE │
│ AUTHOR BE LIABLE FOR ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL │
│ DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR │
│ PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER │
│ TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR │
│ PERFORMANCE OF THIS SOFTWARE. │
╚─────────────────────────────────────────────────────────────────────────────*/
#include "libc/mem/gc.h"
#include "libc/runtime/runtime.h"
#include "libc/stdio/stdio.h"
#include "libc/str/str.h"
#include "libc/testlib/testlib.h"
#include "libc/x/x.h"
char testlib_enable_tmp_setup_teardown;
TEST(ftrace, test) {
const char *ftraceasm;
testlib_extract("/zip/ftraceasm.txt", "ftraceasm.txt", 0755);
ftraceasm = _gc(xslurp("ftraceasm.txt", 0));
#ifdef __x86_64__
if (strstr(ftraceasm, "%xmm") || strstr(ftraceasm, "%ymm")) {
#elif defined(__aarch64__)
if (strstr(ftraceasm, " d0,") || strstr(ftraceasm, " v0.")) {
#else
if (0) {
#endif
fprintf(stderr,
"error: ftrace_hook() depends on floating point code\n"
"you need to objdump o//test/libc/runtime/ftraceasm.elf\n"
"then compile the guilty module with -mgeneral-regs-only\n");
exit(1);
}
}

23
test/libc/runtime/prog/ftraceasm.c Normal file
View file

@ -0,0 +1,23 @@
/*-*- mode:c;indent-tabs-mode:nil;c-basic-offset:2;tab-width:8;coding:utf-8 -*-│
│vi: set net ft=c ts=2 sts=2 sw=2 fenc=utf-8 :vi│
╞══════════════════════════════════════════════════════════════════════════════╡
│ Copyright 2023 Justine Alexandra Roberts Tunney │
│ │
│ Permission to use, copy, modify, and/or distribute this software for │
│ any purpose with or without fee is hereby granted, provided that the │
│ above copyright notice and this permission notice appear in all copies. │
│ │
│ THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL │
│ WARRANTIES WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED │
│ WARRANTIES OF MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE │
│ AUTHOR BE LIABLE FOR ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL │
│ DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR │
│ PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER │
│ TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR │
│ PERFORMANCE OF THIS SOFTWARE. │
╚─────────────────────────────────────────────────────────────────────────────*/
void ftrace_hook(void);
void _start(void) {
ftrace_hook();
}

13
test/libc/runtime/test.mk
View file

@ -52,6 +52,7 @@ o/$(MODE)/test/libc/runtime/runtime.pkg: \
o/$(MODE)/test/libc/runtime/%.com.dbg: \
$(TEST_LIBC_RUNTIME_DEPS) \
o/$(MODE)/test/libc/mem/prog/life.elf.zip.o \
o/$(MODE)/test/libc/runtime/prog/ftraceasm.txt.zip.o \
o/$(MODE)/test/libc/runtime/%.o \
o/$(MODE)/test/libc/runtime/runtime.pkg \
$(LIBC_TESTMAIN) \
@ -81,6 +82,18 @@ o/$(MODE)/test/libc/runtime/itsatrap_test.o: private \
-fno-sanitize=all \
-ftrapv
o/$(MODE)/test/libc/runtime/prog/ftraceasm.elf: \
$(TEST_LIBC_RUNTIME_DEPS) \
o/$(MODE)/test/libc/runtime/prog/ftraceasm.o \
o/$(MODE)/test/libc/runtime/runtime.pkg
@$(ELFLINK)
o/$(MODE)/test/libc/runtime/prog/ftraceasm.txt: \
o/$(MODE)/test/libc/runtime/prog/ftraceasm.elf
@$(OBJDUMP) -d $< >$@
o/$(MODE)/test/libc/runtime/prog/ftraceasm.txt.zip.o: private \
ZIPOBJ_FLAGS += \
-B
.PHONY: o/$(MODE)/test/libc/runtime
o/$(MODE)/test/libc/runtime: \
$(TEST_LIBC_RUNTIME_BINS) \

4
third_party/python/Objects/unicodeobject.c vendored
View file

@ -5,6 +5,7 @@
│ https://docs.python.org/3/license.html │
╚─────────────────────────────────────────────────────────────────────────────*/
#define PY_SSIZE_T_CLEAN
#include "third_party/python/Include/unicodeobject.h"
#include "libc/assert.h"
#include "libc/errno.h"
#include "libc/fmt/fmt.h"
@ -39,7 +40,6 @@
#include "third_party/python/Include/sliceobject.h"
#include "third_party/python/Include/tupleobject.h"
#include "third_party/python/Include/ucnhash.h"
#include "third_party/python/Include/unicodeobject.h"
#include "third_party/python/Include/warnings.h"
#include "third_party/python/Include/yoink.h"
#include "third_party/python/Modules/unicodedata.h"
@ -4902,7 +4902,7 @@ PyUnicode_DecodeUTF8(const char *s,
# error C 'long' size should be either 4 or 8!
#endif
static optimizespeed Py_ssize_t
static Py_ssize_t
ascii_decode(const char *start, const char *end, Py_UCS1 *dest)
{
const char *p = start;

2
third_party/python/Parser/acceler.c vendored
View file

@ -66,7 +66,7 @@ fixdfa(grammar *g, dfa *d)
fixstate(g, s);
}
static optimizespeed void
static void
fixstate(grammar *g, state *s)
{
arc *a;

4
third_party/python/Parser/parsetok.c vendored
View file

@ -4,12 +4,12 @@
│ Python 3 │
│ https://docs.python.org/3/license.html │
╚─────────────────────────────────────────────────────────────────────────────*/
#include "third_party/python/Include/parsetok.h"
#include "third_party/python/Include/errcode.h"
#include "third_party/python/Include/graminit.h"
#include "third_party/python/Include/grammar.h"
#include "third_party/python/Include/node.h"
#include "third_party/python/Include/objimpl.h"
#include "third_party/python/Include/parsetok.h"
#include "third_party/python/Include/pgenheaders.h"
#include "third_party/python/Include/pyerrors.h"
#include "third_party/python/Parser/parser.h"
@ -184,7 +184,7 @@ warn(const char *msg, const char *filename, int lineno)
/* Parse input coming from the given tokenizer structure.
Return error code. */
static optimizespeed node *
static node *
parsetok(struct tok_state *tok, grammar *g, int start, perrdetail *err_ret,
int *flags)
{

8
third_party/stb/stb_image.c vendored
View file

@ -1031,11 +1031,9 @@ static const unsigned char stbi__jpeg_dezigzag[64 + 15] = {
63, 63, 63, 63, 63, 63, 63, 63, 63, 63, 63, 63, 63, 63, 63};
// decode one 64-entry block
static optimizespeed int stbi__jpeg_decode_block(stbi__jpeg *j, short data[64],
stbi__huffman *hdc,
stbi__huffman *hac,
int16_t *fac, int b,
uint16_t *dequant) {
static int stbi__jpeg_decode_block(stbi__jpeg *j, short data[64],
stbi__huffman *hdc, stbi__huffman *hac,
int16_t *fac, int b, uint16_t *dequant) {
unsigned int zig;
int diff, dc, k, t, c, r, s, rs;
if (j->code_bits < 16) stbi__grow_buffer_unsafe(j);

5
third_party/stb/stb_image_resize.c vendored
View file

@ -16,12 +16,12 @@
│ TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR │
│ PERFORMANCE OF THIS SOFTWARE. │
╚─────────────────────────────────────────────────────────────────────────────*/
#include "third_party/stb/stb_image_resize.h"
#include "libc/assert.h"
#include "libc/macros.internal.h"
#include "libc/math.h"
#include "libc/mem/mem.h"
#include "libc/str/str.h"
#include "third_party/stb/stb_image_resize.h"
asm(".ident\t\"\\n\\n\
stb_image_resize (Public Domain)\\n\
@ -853,8 +853,7 @@ static float* stbir__get_decode_buffer(stbir__info* stbir_info) {
#define STBIR__DECODE(type, colorspace) \
((type) * (STBIR_MAX_COLORSPACES) + (colorspace))
static optimizespeed void stbir__decode_scanline(stbir__info* stbir_info,
int n) {
static void stbir__decode_scanline(stbir__info* stbir_info, int n) {
int c;
int channels = stbir_info->channels;
int alpha_channel = stbir_info->alpha_channel;

2
third_party/unzip/fileio.c vendored
View file

@ -2868,7 +2868,7 @@ char *str2oem(dst, src)
/* Function memset() */
/*********************/
zvoid *memset(buf, init, len)
zvoid *memset_(buf, init, len)
register zvoid *buf; /* buffer location */
register int init; /* initializer character */
register unsigned int len; /* length of the buffer */