arch/sim: Implement up_backtrace

Signed-off-by: Xiang Xiao <xiaoxiang@xiaomi.com>

arch/sim/src/Makefile

@@ -61,6 +61,10 @@ CSRCS += up_heap.c up_uart.c up_assert.c up_puts.c
 CSRCS += up_copyfullstate.c
 CSRCS += up_sigdeliver.c
 
+ifeq ($(CONFIG_SCHED_BACKTRACE),y)
+CSRCS += up_backtrace.c
+endif
+
 ifeq ($(CONFIG_ARCH_HAVE_VFORK),y)
 ifeq ($(CONFIG_SCHED_WAITPID),y)
 CSRCS += up_vfork.c
@@ -75,7 +79,7 @@ ifeq ($(CONFIG_HOST_MACOS),y)
   HOSTCFLAGS += -Wno-deprecated-declarations
 endif
 
-HOSTSRCS = up_hostirq.c up_hostmemory.c up_hosttime.c up_simuart.c up_host_abort.c
+HOSTSRCS = up_hostirq.c up_hostmemory.c up_hosttime.c up_simuart.c up_hostmisc.c
 STDLIBS += -lpthread
 ifeq ($(CONFIG_HOST_MACOS),y)
 ifeq ($(CONFIG_LIBCXX),y)

arch/sim/src/nuttx-names.in

@@ -35,6 +35,7 @@ NXSYMBOLS(abort)
 NXSYMBOLS(accept)
 NXSYMBOLS(access)
 NXSYMBOLS(atexit)
+NXSYMBOLS(backtrace)
 NXSYMBOLS(bind)
 NXSYMBOLS(calloc)
 NXSYMBOLS(chmod)

arch/sim/src/sim/up_assert.c

@@ -73,6 +73,8 @@
 
 void up_assert(const char *filename, int lineno)
 {
+  FAR struct tcb_s *rtcb = running_task();
+
   /* Flush any buffered SYSLOG data (prior to the assertion) */
 
   syslog_flush();
@@ -82,7 +84,7 @@ void up_assert(const char *filename, int lineno)
 #ifdef CONFIG_SMP
 #if CONFIG_TASK_NAME_SIZE > 0
   _alert("Assertion failed CPU%d at file:%s line: %d task: %s\n",
-         up_cpu_index(), filename, lineno, running_task()->name);
+         up_cpu_index(), filename, lineno, rtcb->name);
 #else
   _alert("Assertion failed CPU%d at file:%s line: %d\n",
          up_cpu_index(), filename, lineno);
@@ -90,13 +92,19 @@ void up_assert(const char *filename, int lineno)
 #else
 #if CONFIG_TASK_NAME_SIZE > 0
   _alert("Assertion failed at file:%s line: %d task: %s\n",
-         filename, lineno, running_task()->name);
+         filename, lineno, rtcb->name);
 #else
   _alert("Assertion failed at file:%s line: %d\n",
          filename, lineno);
 #endif
 #endif
 
+  /* Show back trace */
+
+#ifdef CONFIG_SCHED_BACKTRACE
+  sched_dumpstack(rtcb->pid);
+#endif
+
   /* Flush any buffered SYSLOG data (from the above) */
 
   syslog_flush();
@@ -104,14 +112,14 @@ void up_assert(const char *filename, int lineno)
   /* Allow for any board/configuration specific crash information */
 
 #ifdef CONFIG_BOARD_CRASHDUMP
-  board_crashdump(up_getsp(), running_task(), filename, lineno);
+  board_crashdump(up_getsp(), rtcb, filename, lineno);
 #endif
 
   /* Flush any buffered SYSLOG data */
 
   syslog_flush();
 
-  if (CURRENT_REGS || (running_task())->flink == NULL)
+  if (CURRENT_REGS || rtcb->flink == NULL)
     {
       /* Exit the simulation */
 

arch/sim/src/sim/up_backtrace.c

@@ -0,0 +1,55 @@
+/****************************************************************************
+ * arch/sim/src/sim/up_backtrace.c
+ *
+ * Licensed to the Apache Software Foundation (ASF) under one or more
+ * contributor license agreements.  See the NOTICE file distributed with
+ * this work for additional information regarding copyright ownership.  The
+ * ASF licenses this file to you under the Apache License, Version 2.0 (the
+ * "License"); you may not use this file except in compliance with the
+ * License.  You may obtain a copy of the License at
+ *
+ *   http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
+ * WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.  See the
+ * License for the specific language governing permissions and limitations
+ * under the License.
+ *
+ ****************************************************************************/
+
+/****************************************************************************
+ * Included Files
+ ****************************************************************************/
+
+#include <nuttx/arch.h>
+#include <sched/sched.h>
+
+#include <string.h>
+
+#include "up_internal.h"
+
+/****************************************************************************
+ * Public Functions
+ ****************************************************************************/
+
+int up_backtrace(struct tcb_s *tcb, void **buffer, int size, int skip)
+{
+  void *buf[skip + size];
+  int ret = 0;
+
+  if (tcb == running_task())
+    {
+      ret = host_backtrace(buf, skip + size);
+    }
+
+  if (ret <= skip)
+    {
+      return ret < 0 ? ret : 0;
+    }
+
+  ret -= skip;
+  memcpy(buffer, &buf[skip], ret * sizeof(void *));
+
+  return ret;
+}

arch/sim/src/sim/up_hostmisc.c

@@ -1,5 +1,5 @@
 /****************************************************************************
- * arch/sim/src/sim/up_host_abort.c
+ * arch/sim/src/sim/up_hostmisc.c
  *
  * Licensed to the Apache Software Foundation (ASF) under one or more
  * contributor license agreements.  See the NOTICE file distributed with
@@ -22,6 +22,7 @@
  * Included Files
  ****************************************************************************/
 
+#include <execinfo.h>
 #include <stdlib.h>
 
 #include "up_internal.h"
@@ -47,3 +48,9 @@ void host_abort(int status)
   exit(status);
 }
 
+int host_backtrace(void** array, int size)
+{
+  /* exit the simulation */
+
+  return backtrace(array, size);
+}

arch/sim/src/sim/up_internal.h

@@ -142,9 +142,10 @@ void up_copyfullstate(uint32_t *dest, uint32_t *src);
 
 void *up_doirq(int irq, void *regs);
 
-/* up_head.c ****************************************************************/
+/* up_hostmisc.c ************************************************************/
 
 void host_abort(int status);
+int  host_backtrace(void** array, int size);
 
 /* up_hostmemory.c **********************************************************/