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libc/time: add g_lcl_lock to protect local context in localsub 

0x0c1561f8 in localsub (tmp=0x3c887088, offset=0, timep=0x3c887078) at time/lib_localtime.c:1993
localtime_r (timep=0x3c887078, timep@entry=0x3c887088, tmp=0x3c887088, tmp@entry=0x3c887098) at time/lib_localtime.c:2819
0x0c1225c8 in nx_vsyslog (priority=7, fmt=0x2c6d9700 <error: Cannot access memory at address 0x2c6d9700>,
ap=0x3c887170, ap@entry=0x3c887178) at syslog/vsyslog.c:135
0x0c152068 in vsyslog (priority=priority@entry=7,
fmt=fmt@entry=0x2c6d9700 <error: Cannot access memory at address 0x2c6d9700>, ap=ap@entry=...) at syslog/lib_syslog.c:68
0x0c152098 in syslog (priority=priority@entry=7, fmt=0x2c6d9700 <error: Cannot access memory at address 0x2c6d9700>) at syslog/lib_syslog.c:100

Signed-off-by: dongjiuzhu1 <dongjiuzhu1@xiaomi.com>
This commit is contained in:
dongjiuzhu1 2024-01-03 11:24:25 +08:00 committed by Xiang Xiao
parent a9bc198bc3
commit 7f99a15ccf
1 changed files with 33 additions and 18 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

51
libs/libc/time/lib_localtime.c
View File

@ -396,6 +396,30 @@ static int tzparse(FAR const char *name, FAR struct state_s *sp,
* Private Functions
****************************************************************************/
static inline void tz_lock(FAR rmutex_t *lock)
{
#ifndef __KERNEL__
if (up_interrupt_context() || (sched_idletask() && OSINIT_IDLELOOP()))
{
return;
}
#endif
nxrmutex_lock(lock);
}
static inline void tz_unlock(FAR rmutex_t *lock)
{
#ifndef __KERNEL__
if (up_interrupt_context() || (sched_idletask() && OSINIT_IDLELOOP()))
{
return;
}
#endif
nxrmutex_unlock(lock);
}
/* Initialize *S to a value based on UTOFF, ISDST, and DESIGIDX. */
static void init_ttinfo(FAR struct ttinfo_s *s, int_fast32_t utoff,
@ -1912,6 +1936,7 @@ static FAR struct tm *localsub(FAR const time_t *timep,
return NULL;
}
tz_lock(&g_lcl_lock);
if ((sp->goback && t < sp->ats[0]) ||
(sp->goahead && t > sp->ats[sp->timecnt - 1]))
{
@ -1948,6 +1973,7 @@ static FAR struct tm *localsub(FAR const time_t *timep,
if (newt < sp->ats[0] || newt > sp->ats[sp->timecnt - 1])
{
tz_unlock(&g_lcl_lock);
return NULL; /* "cannot happen" */
}
@ -1968,12 +1994,14 @@ static FAR struct tm *localsub(FAR const time_t *timep,
if (newy < INT_MIN || newy > INT_MAX)
{
tz_unlock(&g_lcl_lock);
return NULL;
}
result->tm_year = newy;
}
tz_unlock(&g_lcl_lock);
return result;
}
@ -2019,6 +2047,7 @@ static FAR struct tm *localsub(FAR const time_t *timep,
result->tm_zone = tzname[result->tm_isdst];
}
tz_unlock(&g_lcl_lock);
return result;
}
@ -2029,14 +2058,7 @@ static FAR struct tm *gmtsub(FAR const time_t *timep,
{
if (!g_gmt_isset)
{
#ifndef __KERNEL__
if (up_interrupt_context() || (sched_idletask() && OSINIT_IDLELOOP()))
{
return NULL;
}
#endif
nxrmutex_lock(&g_gmt_lock);
tz_lock(&g_gmt_lock);
if (!g_gmt_isset)
{
@ -2048,7 +2070,7 @@ static FAR struct tm *gmtsub(FAR const time_t *timep,
}
}
nxrmutex_unlock(&g_gmt_lock);
tz_unlock(&g_gmt_lock);
}
tmp->tm_zone = ((FAR char *)(offset ? g_wildabbr :
@ -2758,13 +2780,6 @@ void tzset(void)
{
FAR const char *name;
#ifndef __KERNEL__
if (up_interrupt_context() || (sched_idletask() && OSINIT_IDLELOOP()))
{
return;
}
#endif
name = getenv("TZ");
if (name == NULL)
{
@ -2781,7 +2796,7 @@ void tzset(void)
return;
}
nxrmutex_lock(&g_lcl_lock);
tz_lock(&g_lcl_lock);
if (g_lcl_ptr == NULL)
{
@ -2802,7 +2817,7 @@ void tzset(void)
tzname:
settzname();
g_lcl_isset = 1;
nxrmutex_unlock(&g_lcl_lock);
tz_unlock(&g_lcl_lock);
}
FAR struct tm *localtime(FAR const time_t *timep)