mirror of
https://github.com/jart/cosmopolitan.git
synced 2025-02-01 03:53:33 +00:00
d1d4388201
It hasn't been helpful enough to be justify the maintenance burden. What actually does help is mprotect(), kprintf(), --ftrace and --strace which can always be counted upon to work correctly. We aren't losing much with this change. Support for ASAN on AARCH64 was never implemented. Applying ASAN to the core libc runtimes was disabled many months ago. If there is some way to have an ASAN runtime for user programs that is less invasive we can potentially consider reintroducing support. But now is premature.
75 lines
3.1 KiB
C
75 lines
3.1 KiB
C
/*-*- mode:c;indent-tabs-mode:nil;c-basic-offset:2;tab-width:8;coding:utf-8 -*-│
|
|
│ vi: set et 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/calls/blockcancel.internal.h"
|
|
#include "libc/calls/calls.h"
|
|
#include "libc/dce.h"
|
|
#include "libc/runtime/runtime.h"
|
|
|
|
#define ASAN_ERROR "error: tinyprint() passed invalid memory, or missing NULL\n"
|
|
|
|
static bool tinyflush(int fd, char *buf, size_t n, ssize_t *toto) {
|
|
ssize_t rc;
|
|
if ((rc = write(fd, buf, n)) != -1) {
|
|
*toto += rc;
|
|
return false;
|
|
} else {
|
|
if (!*toto) {
|
|
--*toto;
|
|
}
|
|
return true;
|
|
}
|
|
}
|
|
|
|
/**
|
|
* Writes strings to file descriptor, e.g.
|
|
*
|
|
* tinyprint(1, "hello", " ", "world", "\n", NULL);
|
|
*
|
|
* This function is intended so that small command line programs (e.g.
|
|
* build utilities) can print succinct error messages automatically to
|
|
* standard io without linking too much binary footprint.
|
|
*
|
|
* @param fd is file descriptor
|
|
* @param s is NUL-terminated string, or NULL
|
|
* @return bytes written on success, or -1 w/ errno
|
|
*/
|
|
ssize_t tinyprint(int fd, const char *s, ...) {
|
|
int c;
|
|
size_t n;
|
|
va_list va;
|
|
ssize_t toto;
|
|
char buf[512];
|
|
BLOCK_CANCELATION;
|
|
va_start(va, s);
|
|
for (toto = n = 0; s; s = va_arg(va, const char *)) {
|
|
while ((c = *s++)) {
|
|
buf[n++] = c;
|
|
if (n == sizeof(buf)) {
|
|
if (tinyflush(fd, buf, n, &toto)) {
|
|
return toto;
|
|
}
|
|
n = 0;
|
|
}
|
|
}
|
|
}
|
|
va_end(va);
|
|
tinyflush(fd, buf, n, &toto);
|
|
ALLOW_CANCELATION;
|
|
return toto;
|
|
}
|