Changeset 670 for trunk/kernel/syscalls/sys_readdir.c

Timestamp:

Nov 19, 2020, 11:45:52 PM (4 years ago)

Author:

alain

Message:

1) Introduce up to 4 command lines arguments in the KSH "load" command.
These arguments are transfered to the user process through the
argc/argv mechanism, using the user space "args" vseg.

2) Introduce the named and anonymous "pipes", for inter-process communication
through the pipe() and mkfifo() syscalls.

3) Introduce the "chat" application to validate the two above mechanisms.

4) Improve printk() and assert() fonctions in printk.c.

File:

• trunk/kernel/syscalls/sys_readdir.c (modified) (7 diffs)

trunk/kernel/syscalls/sys_readdir.c

@@ -2 +2 @@
  * sys_readdir.c - Copy one entry from an open VFS directory to an user buffer.
  *
- * Author    Alain Greiner (2016,2017,2018,2019)
+ * Author    Alain Greiner (2016,2017,2018,2019,2020)
  *
  * Copyright (c) UPMC Sorbonne Universites
@@ -51 +51 @@
         process_t * process = this->process;   // client process
 
-#if (DEBUG_SYS_READDIR || CONFIG_INSTRUMENTATION_SYSCALLS)
+#if (DEBUG_SYS_READDIR || DEBUG_SYSCALLS_ERROR || CONFIG_INSTRUMENTATION_SYSCALLS)
 uint64_t     tm_start = hal_get_cycles();
 #endif
@@ -61 +61 @@
 #endif
  
-    // check buffer in user space
+    // check dirent buffer in user space
     error = vmm_get_vseg( process , (intptr_t)buffer, &vseg );
 
@@ -68 +68 @@
 
 #if DEBUG_SYSCALLS_ERROR
-printk("\n[ERROR] in %s / thread[%x,%x] : user buffer %x unmapped\n",
+if( DEBUG_SYSCALLS_ERROR < (uint32_t)tm_start )
+printk("\n[ERROR] in %s : thread[%x,%x] / dirent user buffer %x unmapped\n",
 __FUNCTION__ , process->pid , this->trdid, buffer );
 #endif
@@ -84 +85 @@
 
 #if DEBUG_SYSCALLS_ERROR
-printk("\n[ERROR] in %s / thread[%x,%x] : dirp %x not registered\n",
+if( DEBUG_SYSCALLS_ERROR < (uint32_t)tm_start )
+printk("\n[ERROR] in %s : thread[%x,%x] / dirp %x not registered\n",
 __FUNCTION__ , process->pid , this->trdid, dirp );
 #endif
@@ -106 +108 @@
 
 #if (DEBUG_SYS_READDIR & 1)
-if( DEBUG_SYS_READDIR < tm_start )
+if( DEBUG_SYS_READDIR < (uint32_t)tm_start )
 printk("\n[%s] entries = %d / current = %d / direntp = %x\n",
 __FUNCTION__, entries, current, direntp );
@@ -126 +128 @@
 
 #if DEBUG_SYS_READDIR
-if( DEBUG_SYS_READDIR < tm_end )
+if( DEBUG_SYS_READDIR < (uint32_t)tm_end )
 printk("\n[%s] thread[%x,%x] exit / cycle %d\n",
 __FUNCTION__, process->pid, this->trdid, (uint32_t)tm_end );