To determine whether a signal is real-time signal or standard signal, the POSIX standard https://www.man7.org/linux/man-pages/man7/signal.7.html defines a real-time signal between SIGRTMIN and SIGRTMAX , which can store multiple copies, otherwise only one can be retained.
Signed-off-by: xinhaiteng <xinhaiteng@xiaomi.com>
If we are running on a single CPU architecture, then we know interrupts
are disabled and there is no need to explicitly call enter_critical_section().
However, in the SMP case, enter_critical_section() is required prevent
multiple cpu to enter timer_start.
Signed-off-by: zhangyuan21 <zhangyuan21@xiaomi.com>
core0 may write the data used by other cpu, this will cause cache inconsistency.
so need fulsh dcache before start other cpus.
Signed-off-by: zhangyuan21 <zhangyuan21@xiaomi.com>
The memory allocated with strdup and asprintf is done via lib_malloc
so we need to use lib_free to deallocate memory otherwise the assertion
"Free memory from the wrong heap" is hit with flat mode and user separated
heap enabled mode.
Signed-off-by: Petro Karashchenko <petro.karashchenko@gmail.com>
We can use the driver in nuttx to download
files with debugger
Signed-off-by: anjiahao <anjiahao@xiaomi.com>
Signed-off-by: chao an <anchao@xiaomi.com>
reproduce:
static void *pthread(void *arg)
{
system(arg);
}
void test (int argc, char *argv[])
{
pthread_create(&pthread0, &attr, pthread, argv[1]);
pthread_create(&pthread1, &attr, pthread, argv[2]);
}
only one pthread system() returnd, othres hanged
rootcause:
As we known, system() will create a new task called:
system -c XX
The example:
parent group child groups
pthread0 -> waitpid() -> system -c ps -> exit() -> nxtask_signalparent()
pthread1 -> waitpid() -> system -c ls -> exit() -> nxtask_signalparent()
Each child group exit with function nxtask_signalparent(),
As we expect:
system -c ps will signal pthread0
system -c ls will signal pthread1
But actually:
system -c ps will signal pthread0/1
system -c ls will signal pthread0/1
As the spec, we know, this behavior is normal:
https://man7.org/linux/man-pages/man2/sigwaitinfo.2.html
So for this situation, when the signo is SIGCHLD, we broadcast.
Signed-off-by: ligd <liguiding1@xiaomi.com>
Standard POSIX specification in URL “https://pubs.opengroup.org/onlinepubs/9699919799/functions/mq_timedsend.html” requires that "EBADF" be returned when message queue not opened for writing.So i update the related descriptions in this file, no function changed.
Signed-off-by: yangjiao <yangjiao@xiaomi.com>
Standard POSIX specification in URL “https://pubs.opengroup.org/onlinepubs/9699919799/functions/mq_send.html” requires that "EBADF" be returned when mqdes is not open for writing. And message priorities range from 0 to {MQ_PRIO_MAX}-1. In this change, i update them to follow POSIX spec.
Signed-off-by: yangjiao <yangjiao@xiaomi.com>
In POSIX testcase "open_posix_testsuite/conformance/interfaces/mq_receive/11-2.c", it will return "EPERM" when message queue is not opened for reading, but the standard POSIX specification in URL “https://pubs.opengroup.org/onlinepubs/9699919799/functions/mq_receive.html” requires that "EBADF" be returned.So in this change, i update it.
Signed-off-by: yangjiao <yangjiao@xiaomi.com>
When supporting high-priority interrupts, updating the
g_running_tasks within a high-priority interrupt may be
cause problems. The g_running_tasks should only be updated
when it is determined that a task context switch has occurred.
Signed-off-by: zhangyuan21 <zhangyuan21@xiaomi.com>
fix ltp pthread_cond_wait_1 test question, child should inherit parent
priority by default.
nsh> ltp_pthread_cond_wait_1
Error: the policy or priority not correct
Signed-off-by: yangyalei <yangyalei@xiaomi.com>
The nxspawn_dup2 function will return a value greater than 0,
so the loop should only exit if ret is less than 0.
Signed-off-by: zhangyuan21 <zhangyuan21@xiaomi.com>
pass ltp sigaction case 19-5.c, 23-5,c and 28-5.c.
When SIGCONT is dispatched, resume all members of the task group.
So there is nothing do in default action.
Signed-off-by: fangxinyong <fangxinyong@xiaomi.com>
1. as we can use fork to implement vfork, so we rename the vfork to
fork, and use the fork method as the base to implement vfork method
2. create the vfork function as a libc function based on fork
function
Signed-off-by: guoshichao <guoshichao@xiaomi.com>
xinhaiteng