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syscall/prctl: fix PR_SET_NAME failure if without <pid> arg 

add PR_SET_NAME_EXT/PR_GET_NAME_EXT extension to avoid semantic
conflicts, use extened version for pthread_setname_np/pthread_getname_np

Change-Id: I40404c737977a623130dcd37feb4061b5526e466
Signed-off-by: chao.an <anchao@xiaomi.com>
This commit is contained in:
chao.an 2020-06-30 19:32:41 +08:00 committed by Xiang Xiao
parent 310b572116
commit 3fbdc213b7
3 changed files with 41 additions and 12 deletions
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4
include/pthread.h
View File

@ -207,10 +207,10 @@
*/
#define pthread_setname_np(thread, name) \
prctl((int)PR_SET_NAME, (char*)name, (int)thread)
prctl((int)PR_SET_NAME_EXT, (char*)name, (int)thread)
#define pthread_getname_np(thread, name) \
prctl((int)PR_GET_NAME, (char*)name, (int)thread)
prctl((int)PR_GET_NAME_EXT, (char*)name, (int)thread)
/********************************************************************************
* Public Type Definitions

37
include/sys/prctl.h
View File

@ -47,26 +47,47 @@
/* Supported prctl() commands.
*
* PR_SET_NAME
* Set the name of the calling thread, using the value in the location
* pointed to by (char *) arg2. The name can be up to
* CONFIG_TASK_NAME_SIZE long, including the terminating null byte.
* (If the length of the string, including the terminating null byte,
* exceeds CONFIG_TASK_NAME_SIZE bytes, the string is silently truncated.)
* As an example:
*
* prctl(PR_SET_NAME, "MyName");
*
* PR_GET_NAME
* Return the name of the calling thread, in the buffer pointed to by
* (char *) arg2. The buffer should allow space for up to
* CONFIG_TASK_NAME_SIZE bytes; the returned string will be
* null-terminated. As an example:
*
* char myname[CONFIG_TASK_NAME_SIZE];
* prctl(PR_GET_NAME, myname);
*
* PR_SET_NAME_EXT
* Set the task (or thread) name for the thread whose ID is in required
* arg2 (int), using the value in the location pointed to by required arg1
* (char*). The name can be up to CONFIG_TASK_NAME_SIZE long (including
* any null termination). The thread ID of 0 will set the name of the
* calling thread. As an example:
*
* prctl(PR_SET_NAME, "MyName", 0);
* prctl(PR_SET_NAME_EXT, "MyName", pid);
*
* PR_GET_NAME
* PR_GET_NAME_EXT
* Return the task (or thread) name for the for the thread whose ID is
* optional arg2 (int), in the buffer pointed to by optional arg1 (char *).
* The buffer must be CONFIG_TASK_NAME_SIZE long (including any null
* termination). As an example:
* optional arg2 (int), in the buffer pointed to by optional arg1
* (char *). The buffer must be CONFIG_TASK_NAME_SIZE long (including
* any null termination). As an example:
*
* char myname[CONFIG_TASK_NAME_SIZE];
* prctl(PR_GET_NAME, myname, 0);
* prctl(PR_GET_NAME_EXT, myname, pid);
*/
#define PR_SET_NAME 1
#define PR_GET_NAME 2
#define PR_SET_NAME 1
#define PR_GET_NAME 2
#define PR_SET_NAME_EXT 3
#define PR_GET_NAME_EXT 4
/****************************************************************************
* Public Type Definitions

12
sched/task/task_prctl.c
View File

@ -84,13 +84,21 @@ int prctl(int option, ...)
{
case PR_SET_NAME:
case PR_GET_NAME:
case PR_SET_NAME_EXT:
case PR_GET_NAME_EXT:
#if CONFIG_TASK_NAME_SIZE > 0
{
/* Get the prctl arguments */
FAR char *name = va_arg(ap, FAR char *);
int pid = va_arg(ap, int);
FAR struct tcb_s *tcb;
int pid = 0;
if (option == PR_SET_NAME_EXT ||
option == PR_GET_NAME_EXT)
{
pid = va_arg(ap, int);
}
/* Get the TCB associated with the PID (handling the special case
* of pid==0 meaning "this thread")
@ -127,7 +135,7 @@ int prctl(int option, ...)
/* Now get or set the task name */
if (option == PR_SET_NAME)
if (option == PR_SET_NAME || option == PR_SET_NAME_EXT)
{
/* Ensure that tcb->name will be null-terminated, truncating if
* necessary.