[dfs][procfs] Fix Linux-compatible procfs fields

Grow maps without a 256 VMA cap, skip RSS walks for maps, report
matching status text, real RSS/statm, MemAvailable after page-pool
free pages, load averages plus last PID, cumulative processes, RV32
cpuinfo, and per-character mount escaping.

2 files changed, 26 insertions, 0 deletions

diff --git a/components/lwp/lwp_pid.c b/components/lwp/lwp_pid.c
index 12a4dde86f..1f0e09ae9c 100644
--- a/components/lwp/lwp_pid.c
+++ b/components/lwp/lwp_pid.c
@@ -68,6 +68,7 @@ static struct lwp_avl_struct *lwp_pid_free_head = RT_NULL;
 static int lwp_pid_ary_alloced = 0;
 static struct lwp_avl_struct *lwp_pid_root = RT_NULL;
 static pid_t current_pid = 0;
+static unsigned long lwp_create_count = 0;
 static struct rt_mutex pid_mtx;
 static struct rt_wqueue _pid_emptyq;
 
@@ -166,6 +167,28 @@ static int _before_cb(struct lwp_avl_struct *node, void *data)
     return param->cb(pid, param->data);
 }
 
+unsigned long lwp_pid_get_create_count(void)
+{
+    unsigned long count;
+
+    lwp_pid_lock_take();
+    count = lwp_create_count;
+    lwp_pid_lock_release();
+
+    return count;
+}
+
+pid_t lwp_pid_get_last(void)
+{
+    pid_t pid;
+
+    lwp_pid_lock_take();
+    pid = current_pid;
+    lwp_pid_lock_release();
+
+    return pid;
+}
+
 /**
  * @brief Iterate over all process IDs
  *
@@ -694,6 +717,7 @@ rt_lwp_t lwp_create(rt_base_t flags)
             {
                 new_lwp->pid = pid;
                 lwp_pid_set_lwp_locked(pid, new_lwp);
+                lwp_create_count++;
             }
             lwp_pid_lock_release();
         }
diff --git a/components/lwp/lwp_pid.h b/components/lwp/lwp_pid.h
index 5b85b32197..a295137fbc 100644
--- a/components/lwp/lwp_pid.h
+++ b/components/lwp/lwp_pid.h
@@ -28,6 +28,8 @@ struct lwp_avl_struct *lwp_get_pid_ary(void);
 int lwp_pid_init(void);
 int lwp_pid_wait_for_empty(int wait_flags, rt_tick_t to);
 int lwp_pid_for_each(int (*cb)(pid_t pid, void *data), void *data);
+unsigned long lwp_pid_get_create_count(void);
+pid_t lwp_pid_get_last(void);
 void lwp_pid_put(struct rt_lwp *lwp);
 void lwp_pid_rollback(struct rt_lwp *lwp);
 void lwp_pid_lock_take(void);