sched/getpid: replace syscall getpid/tid/ppid() to kernel version

NuttX kernel should not use the syscall functions, especially after
enabling CONFIG_SCHED_INSTRUMENTATION_SYSCALL, all system functions
will be traced to backend, which will impact system performance.

Signed-off-by: chao an <anchao@xiaomi.com>

mm/mempool/mempool.c

@@ -102,7 +102,7 @@ static inline void mempool_add_backtrace(FAR struct mempool_s *pool,
                                          FAR struct mempool_backtrace_s *buf)
 {
   list_add_head(&pool->alist, &buf->node);
-  buf->pid = gettid();
+  buf->pid = _SCHED_GETTID();
 #  if CONFIG_MM_BACKTRACE > 0
   if (pool->procfs.backtrace)
     {

mm/mm_heap/mm.h

@@ -75,7 +75,7 @@
      do \
        { \
          FAR struct mm_allocnode_s *tmp = (FAR struct mm_allocnode_s *)(ptr); \
-         tmp->pid = gettid(); \
+         tmp->pid = _SCHED_GETTID(); \
        } \
      while (0)
 #elif CONFIG_MM_BACKTRACE > 0
@@ -84,7 +84,7 @@
        { \
          FAR struct mm_allocnode_s *tmp = (FAR struct mm_allocnode_s *)(ptr); \
          FAR struct tcb_s *tcb; \
-         tmp->pid = gettid(); \
+         tmp->pid = _SCHED_GETTID(); \
          tcb = nxsched_get_tcb(tmp->pid); \
          if ((heap)->mm_procfs.backtrace || (tcb && tcb->flags & TCB_FLAG_HEAP_DUMP)) \
            { \

mm/mm_heap/mm_lock.c

@@ -77,17 +77,17 @@ int mm_lock(FAR struct mm_heap_s *heap)
   else
 #endif
 
-  /* gettid() returns the task ID of the task at the head of the ready-to-
-   * run task list.  mm_lock() may be called during context
+  /* _SCHED_GETTID() returns the task ID of the task at the head of the
+   * ready-to-run task list.  mm_lock() may be called during context
    * switches.  There are certain situations during context switching when
    * the OS data structures are in flux and then can't be freed immediately
    * (e.g. the running thread stack).
    *
-   * This is handled by gettid() to return the special value -ESRCH to
-   * indicate this special situation.
+   * This is handled by _SCHED_GETTID() to return the special value -ESRCH
+   * to indicate this special situation.
    */
 
-  if (gettid() < 0)
+  if (_SCHED_GETTID() < 0)
     {
       return -ESRCH;
     }

mm/shm/shmctl.c

@@ -33,6 +33,7 @@
 #include <assert.h>
 #include <debug.h>
 
+#include <nuttx/sched.h>
 #include <nuttx/pgalloc.h>
 
 #include "shm/shm.h"
@@ -184,7 +185,7 @@ int shmctl(int shmid, int cmd, struct shmid_ds *buf)
   /* Save the process ID of the last operation */
 
   region = &g_shminfo.si_region[shmid];
-  region->sr_ds.shm_lpid = getpid();
+  region->sr_ds.shm_lpid = _SCHED_GETPID();
 
   /* Save the time of the last shmctl() */
 

mm/shm/shmget.c

@@ -32,6 +32,7 @@
 #include <errno.h>
 
 #include <nuttx/pgalloc.h>
+#include <nuttx/sched.h>
 
 #include "shm/shm.h"
 
@@ -268,7 +269,7 @@ static int shm_create(key_t key, size_t size, int shmflg)
   /* Save the process ID of the creator */
 
   region = &g_shminfo.si_region[shmid];
-  region->sr_ds.shm_cpid = getpid();
+  region->sr_ds.shm_cpid = _SCHED_GETPID();
 
   /* Return the shared memory ID */
 

mm/tlsf/mm_tlsf.c

@@ -144,7 +144,7 @@ static void memdump_backtrace(FAR struct mm_heap_s *heap,
   FAR struct tcb_s *tcb;
 #  endif
 
-  dump->pid = getpid();
+  dump->pid = _SCHED_GETPID();
 #  if CONFIG_MM_BACKTRACE > 0
   tcb = nxsched_get_tcb(dump->pid);
   if (heap->mm_procfs.backtrace ||
@@ -319,17 +319,17 @@ static int mm_lock(FAR struct mm_heap_s *heap)
   else
 #endif
 
-  /* gettid() returns the task ID of the task at the head of the ready-to-
-   * run task list.  mm_lock() may be called during context
+  /* _SCHED_GETTID() returns the task ID of the task at the head of the
+   * ready-to-run task list.  mm_lock() may be called during context
    * switches.  There are certain situations during context switching when
    * the OS data structures are in flux and then can't be freed immediately
    * (e.g. the running thread stack).
    *
-   * This is handled by gettid() to return the special value -ESRCH to
-   * indicate this special situation.
+   * This is handled by _SCHED_GETTID() to return the special value
+   * -ESRCH to indicate this special situation.
    */
 
-  if (gettid() < 0)
+  if (_SCHED_GETTID() < 0)
     {
       return -ESRCH;
     }