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Get rid of kmalloc()

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This changes *NSYNC to allocate waiters on the stack so our locks don't
need to depend on dynamic memory. This make our runtiem simpler, and it
also fixes bugs with thread cancellation support.
This commit is contained in:
Justine Tunney 2023-09-11 21:34:53 -07:00
parent 77a7873057
commit a359de7893
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GPG key ID: BE714B4575D6E328
57 changed files with 405 additions and 472 deletions
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26
tool/build/runitd.c
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@ -264,9 +264,8 @@ void StartTcpServer(void) {
INFOF("listening on tcp:%s", DescribeAddress(&g_servaddr));
if (g_sendready) {
printf("ready %hu\n", ntohs(g_servaddr.sin_port));
fflush(stdout);
fclose(stdout);
dup2(g_bogusfd, fileno(stdout));
close(1);
dup2(g_bogusfd, 1);
}
}
@ -698,6 +697,7 @@ WaitAgain:
}
void HandleClient(void) {
struct stat st;
struct Client *client;
client = calloc(1, sizeof(struct Client));
client->addrsize = sizeof(client->addr);
@ -720,6 +720,9 @@ void HandleClient(void) {
WARNF("poll failed %m");
}
}
if (fstat(2, &st) != -1 && st.st_size > kLogMaxBytes) {
ftruncate(2, 0); // auto rotate log
}
sigset_t mask;
pthread_attr_t attr;
sigfillset(&mask);
@ -749,17 +752,18 @@ int Serve(void) {
}
void Daemonize(void) {
VERBF("Daemonize");
struct stat st;
if (fork() > 0) _exit(0);
setsid();
if (fork() > 0) _exit(0);
dup2(g_bogusfd, fileno(stdin));
if (!g_sendready) dup2(g_bogusfd, fileno(stdout));
freopen(kLogFile, "ae", stderr);
if (fstat(fileno(stderr), &st) != -1 && st.st_size > kLogMaxBytes) {
ftruncate(fileno(stderr), 0);
dup2(g_bogusfd, 0);
if (!g_sendready) dup2(g_bogusfd, 1);
close(2);
open(kLogFile, O_CREAT | O_WRONLY | O_APPEND | O_CLOEXEC, 0644);
extern long __klog_handle;
if (__klog_handle > 0) {
close(__klog_handle);
}
__klog_handle = 2;
}
int main(int argc, char *argv[]) {
@ -779,8 +783,8 @@ int main(int argc, char *argv[]) {
} else {
g_bogusfd = open("/dev/zero", O_RDONLY | O_CLOEXEC);
}
if (g_daemonize) Daemonize();
mkdir("o", 0700);
if (g_daemonize) Daemonize();
Serve();
free(g_psk);
#if IsModeDbg()