658804a522
Implements declarations for being able to use clang's thread safety analysis in client libraries that utilize uv's mutexes. Also enable them for building libuv itself. This is a static version of the Thread Sanitizer tests that are already in use on Unix. We will need to add a clang CI agent for Windows to enable the testing there.
94 lines
2.5 KiB
C
94 lines
2.5 KiB
C
/* Copyright libuv contributors. All rights reserved.
|
|
*
|
|
* Permission is hereby granted, free of charge, to any person obtaining a copy
|
|
* of this software and associated documentation files (the "Software"), to
|
|
* deal in the Software without restriction, including without limitation the
|
|
* rights to use, copy, modify, merge, publish, distribute, sublicense, and/or
|
|
* sell copies of the Software, and to permit persons to whom the Software is
|
|
* furnished to do so, subject to the following conditions:
|
|
*
|
|
* The above copyright notice and this permission notice shall be included in
|
|
* all copies or substantial portions of the Software.
|
|
*
|
|
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
|
|
* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
|
|
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
|
|
* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
|
|
* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
|
|
* FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS
|
|
* IN THE SOFTWARE.
|
|
*/
|
|
|
|
#include "uv.h"
|
|
#include "internal.h"
|
|
|
|
#include <sys/stat.h>
|
|
#include <unistd.h>
|
|
|
|
static uv_once_t once = UV_ONCE_INIT;
|
|
static int status;
|
|
|
|
|
|
int uv__random_readpath(const char* path, void* buf, size_t buflen) {
|
|
struct stat s;
|
|
size_t pos;
|
|
ssize_t n;
|
|
int fd;
|
|
|
|
fd = uv__open_cloexec(path, O_RDONLY);
|
|
|
|
if (fd < 0)
|
|
return fd;
|
|
|
|
if (uv__fstat(fd, &s)) {
|
|
uv__close(fd);
|
|
return UV__ERR(errno);
|
|
}
|
|
|
|
if (!S_ISCHR(s.st_mode)) {
|
|
uv__close(fd);
|
|
return UV_EIO;
|
|
}
|
|
|
|
for (pos = 0; pos != buflen; pos += n) {
|
|
do
|
|
n = read(fd, (char*) buf + pos, buflen - pos);
|
|
while (n == -1 && errno == EINTR);
|
|
|
|
if (n == -1) {
|
|
uv__close(fd);
|
|
return UV__ERR(errno);
|
|
}
|
|
|
|
if (n == 0) {
|
|
uv__close(fd);
|
|
return UV_EIO;
|
|
}
|
|
}
|
|
|
|
uv__close(fd);
|
|
return 0;
|
|
}
|
|
|
|
|
|
static void uv__random_devurandom_init(void) {
|
|
char c;
|
|
|
|
/* Linux's random(4) man page suggests applications should read at least
|
|
* once from /dev/random before switching to /dev/urandom in order to seed
|
|
* the system RNG. Reads from /dev/random can of course block indefinitely
|
|
* until entropy is available but that's the point.
|
|
*/
|
|
status = uv__random_readpath("/dev/random", &c, 1);
|
|
}
|
|
|
|
|
|
int uv__random_devurandom(void* buf, size_t buflen) UV_EXCLUDES(&once) {
|
|
uv_once(&once, uv__random_devurandom_init);
|
|
|
|
if (status != 0)
|
|
return status;
|
|
|
|
return uv__random_readpath("/dev/urandom", buf, buflen);
|
|
}
|