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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
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11 changed files with 142 additions and 85 deletions
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test/libc/runtime/ftrace_test.c Normal file
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/*-*- 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);
}
}