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Improve synchronization

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- Fix bugs in kDos2Errno definition
- malloc() should now be thread safe
- Fix bug in rollup.com header generator
- Fix open(O_APPEND) on the New Technology
- Fix select() on the New Technology and test it
- Work towards refactoring i/o for thread safety
- Socket reads and writes on NT now poll for signals
- Work towards i/o completion ports on the New Technology
- Make read() and write() intermittently check for signals
- Blinkenlights keyboard i/o so much better on NT w/ poll()
- You can now poll() files and sockets at the same time on NT
- Fix bug in appendr() that manifests with dlmalloc footers off
This commit is contained in:
Justine Tunney 2022-04-14 23:39:48 -07:00
parent 233144b19d
commit 933411ba99
266 changed files with 8761 additions and 4344 deletions
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58
libc/sock/sendto.c
View file

@ -18,9 +18,11 @@
╚─────────────────────────────────────────────────────────────────────────────*/
#include "libc/assert.h"
#include "libc/calls/internal.h"
#include "libc/calls/strace.internal.h"
#include "libc/calls/struct/iovec.h"
#include "libc/dce.h"
#include "libc/intrin/asan.internal.h"
#include "libc/macros.internal.h"
#include "libc/sock/internal.h"
#include "libc/sock/sock.h"
#include "libc/str/str.h"
@ -49,36 +51,44 @@
*/
ssize_t sendto(int fd, const void *buf, size_t size, uint32_t flags,
const void *opt_addr, uint32_t addrsize) {
ssize_t rc;
char addr2[sizeof(struct sockaddr_un_bsd)];
if (IsAsan() && (!__asan_is_valid(buf, size) ||
(opt_addr && !__asan_is_valid(opt_addr, addrsize)))) {
return efault();
}
_firewall(opt_addr, addrsize);
if (!IsWindows()) {
if (!IsBsd() || !opt_addr) {
return sys_sendto(fd, buf, size, flags, opt_addr, addrsize);
} else {
char addr2[sizeof(
struct sockaddr_un_bsd)]; /* sockaddr_un_bsd is the largest */
if (addrsize > sizeof(addr2)) return einval();
memcpy(&addr2, opt_addr, addrsize);
sockaddr2bsd(&addr2[0]);
return sys_sendto(fd, buf, size, flags, &addr2[0], addrsize);
}
rc = efault();
} else {
if (__isfdopen(fd)) {
if (__isfdkind(fd, kFdSocket)) {
return sys_sendto_nt(fd, (struct iovec[]){{buf, size}}, 1, flags,
opt_addr, addrsize);
} else if (__isfdkind(fd, kFdFile)) { /* e.g. socketpair() */
if (flags) return einval();
if (opt_addr) return eisconn();
return sys_write_nt(fd, (struct iovec[]){{buf, size}}, 1, -1);
_firewall(opt_addr, addrsize);
if (!IsWindows()) {
if (!IsBsd() || !opt_addr) {
rc = sys_sendto(fd, buf, size, flags, opt_addr, addrsize);
} else if (addrsize > sizeof(addr2)) {
rc = einval();
} else {
return enotsock();
memcpy(&addr2, opt_addr, addrsize);
sockaddr2bsd(&addr2[0]);
rc = sys_sendto(fd, buf, size, flags, &addr2[0], addrsize);
}
} else if (__isfdopen(fd)) {
if (__isfdkind(fd, kFdSocket)) {
rc = sys_sendto_nt(fd, (struct iovec[]){{buf, size}}, 1, flags,
opt_addr, addrsize);
} else if (__isfdkind(fd, kFdFile)) {
if (flags) {
rc = einval();
} else if (opt_addr) {
rc = eisconn();
} else {
rc = sys_write_nt(fd, (struct iovec[]){{buf, size}}, 1, -1);
}
} else {
rc = enotsock();
}
} else {
return ebadf();
rc = ebadf();
}
}
STRACE("sendto(%d, %#.*hhs%s, %'zu, %#x, %p, %u) → %'ld% lm", fd,
MAX(0, MIN(40, rc)), buf, rc > 40 ? "..." : "", size, flags, opt_addr,
addrsize, rc);
return rc;
}