fix: 修复risc-v异常时，异常信息混乱且backtrace无法输出的问题

1.修复risc-v backtrace无法输出的问题
异常时未将fp传入，且backtrace校验不足，容易导致再次异常
2.优化task 输出信息格式
3.shell中task命令代码重复
4.OSBackTraceInit 拼写有误

Close #I4BPHX:riscv32_virt 异常时无法输出backtrace信息

Signed-off-by: zhushengle <zhushengle@huawei.com>
Change-Id: I141d5e7808fc967d846f425422f5dcf2ac01d1d1

kernel/arch/risc-v/riscv32/gcc/los_interrupt.c

@@ -218,41 +218,21 @@ LITE_OS_SEC_TEXT UINT32 HalHwiDelete(HWI_HANDLE_T hwiNum)
     return LOS_OK;
 }
 
-STATIC VOID DisplayTaskInfo(VOID)
+STATIC VOID ExcBackTrace(UINTPTR fp)
 {
-    TSK_INFO_S taskInfo;
-    UINT32 index;
-    UINT32 ret;
-
-    PRINTK("ID  Pri    Status     name \n\r");
-    PRINTK("--  ---    ---------  ----\n\r");
-
-    for (index = 0; index < LOSCFG_BASE_CORE_TSK_LIMIT; index++) {
-        ret = LOS_TaskInfoGet(index, &taskInfo);
-        if (ret != LOS_OK) {
-            continue;
-        }
-        PRINTK("%d    %d     %s      %s \n\r",
-               taskInfo.uwTaskID, taskInfo.usTaskPrio, OsConvertTskStatus(taskInfo.usTaskStatus), taskInfo.acName);
-    }
-    return;
-}
-
-STATIC VOID ExcBackTrace(VOID)
-{
-    UINTPTR LR[LOSCFG_BACKTRACE_DEPTH] = {0};
+    UINTPTR LR[LOSCFG_BACKTRACE_DEPTH] = { 0 };
     UINT32 index;
 
-    OsBackTraceHookCall(LR, LOSCFG_BACKTRACE_DEPTH, 1, 0); /* 1: Ignore the one layer call relationship within the function. */
+    OsBackTraceHookCall(LR, LOSCFG_BACKTRACE_DEPTH, 0, fp);
 
-    PRINTK("----- traceback start -----\r\n");
+    PRINTK("----- traceback start -----\n");
     for (index = 0; index < LOSCFG_BACKTRACE_DEPTH; index++) {
         if (LR[index] == 0) {
             break;
         }
-        PRINTK("traceback %d -- lr = 0x%x\r\n", index, LR[index]);
+        PRINTK("traceback %d -- lr = 0x%x\n", index, LR[index]);
     }
-    PRINTK("----- traceback end -----\r\n");
+    PRINTK("----- traceback end -----\n");
 }
 
 STATIC VOID ExcInfoDisplayContext(const LosExcInfo *exc)
@@ -295,29 +275,33 @@ STATIC VOID ExcInfoDisplayContext(const LosExcInfo *exc)
     PRINTK("t5         = 0x%x\n", taskContext->t5);
     PRINTK("t6         = 0x%x\n", taskContext->t6);
 
-    ExcBackTrace();
+    ExcBackTrace(taskContext->s0);
 }
 
 STATIC VOID ExcInfoDisplay(const LosExcContext *excBufAddr)
 {
-    PRINTK("\r\nException Information     \n\r");
+    PRINTK("\nException Information     \n");
 
     if (g_excInfo.type < RISCV_EXC_TYPE_NUM) {
-        PRINTK("Exc  type : Oops  - %s\n\r", g_excInformation[g_excInfo.type]);
+        PRINTK("Exc  type : Oops  - %s\n", g_excInformation[g_excInfo.type]);
     } else {
-        PRINTK("Exc  type : Oops  - Invalid\n\r");
+        PRINTK("Exc  type : Oops  - Invalid\n");
     }
 
-    PRINTK("taskName = %s\n\r", g_losTask.runTask->taskName);
-    PRINTK("taskID = %u\n\r", g_losTask.runTask->taskID);
-    PRINTK("system mem addr:0x%x\n\r", (UINTPTR)LOSCFG_SYS_HEAP_ADDR);
+    if (LOS_TaskIsRunning()) {
+        PRINTK("taskName = %s\n", g_losTask.runTask->taskName);
+        PRINTK("taskID = %u\n", g_losTask.runTask->taskID);
+    } else {
+        PRINTK("The exception occurs during system startup!\n");
+    }
+    PRINTK("system mem addr:0x%x\n", (UINTPTR)LOSCFG_SYS_HEAP_ADDR);
     ExcInfoDisplayContext(&g_excInfo);
 }
 
 WEAK UINT32 HalUnalignedAccessFix(UINTPTR mcause, UINTPTR mepc, UINTPTR mtval, VOID *sp)
 {
     /* Unaligned access fixes are not supported by default */
-    PRINTK("Unaligned access fixes are not supported by default!\n\r");
+    PRINTK("Unaligned access fixes are not supported by default!\n");
     return LOS_NOK;
 }
 
@@ -327,7 +311,7 @@ VOID HalExcEntry(const LosExcContext *excBufAddr)
     g_excInfo.type = excBufAddr->mcause & 0x1FF;
     g_excInfo.context = (LosExcContext *)excBufAddr;
     if (g_excInfo.nestCnt > 2) { /* 2: Number of layers of exception nesting */
-        PRINTK("hard fault!\n\r");
+        PRINTK("hard fault!\n");
         goto SYSTEM_DEATH;
     }
 
@@ -342,8 +326,10 @@ VOID HalExcEntry(const LosExcContext *excBufAddr)
 
     ExcInfoDisplay(excBufAddr);
 
-    PRINTK("----------------All Task infomation ------------\n\r");
-    DisplayTaskInfo();
+    if (LOS_TaskIsRunning()) {
+        PRINTK("----------------All Task infomation ------------\n");
+        OsGetAllTskInfo();
+    }
 
 SYSTEM_DEATH:
     OsDoExcHook(EXC_INTERRUPT);

kernel/include/los_config.h

@@ -483,7 +483,7 @@ extern UINT8 *m_aucSysMem0;
  * Configuration memory leak detection
  * @attention
  * Need to enable backtrace module synchronously by configuration LOSCFG_BACKTRACE_TYPE,
- * and call OSBackTraceInit to complete initialization before the memory pool is initialized.
+ * and call OsBackTraceInit to complete initialization before the memory pool is initialized.
  */
 #ifndef LOSCFG_MEM_LEAKCHECK
 #define LOSCFG_MEM_LEAKCHECK                                0

kernel/src/los_init.c

@@ -121,7 +121,7 @@ LITE_OS_SEC_TEXT_INIT UINT32 LOS_KernelInit(VOID)
     PRINTK("entering kernel init...\n");
 
 #if (LOSCFG_BACKTRACE_TYPE != 0)
-    OSBackTraceInit();
+    OsBackTraceInit();
 #endif
 
     OsRegister();

kernel/src/los_task.c

@@ -288,18 +288,17 @@ LITE_OS_SEC_TEXT_MINOR UINT32 OsGetAllTskCpupInfo(CPUP_INFO_S **cpuLessOneSec,
 
 LITE_OS_SEC_TEXT_MINOR VOID OsPrintAllTskInfoHeader()
 {
-    PRINTK("\r\nTID  Priority   Status     "
-              "StackSize    WaterLine    StackPoint  TopOfStack   EventMask  SemID");
+    PRINTK("\r\n TID  Priority Status   StackSize WaterLine StackPoint TopOfStack EventMask  SemID");
 #if (LOSCFG_BASE_CORE_CPUP == 1)
-    PRINTK(" CPUUSE   CPUUSE10s  CPUUSE1s  ");
+    PRINTK(" CPUUSE  CPUUSE10s CPUUSE1s  ");
 #endif /* LOSCFG_BASE_CORE_CPUP */
-    PRINTK("  name\n");
-    PRINTK("---  --------   --------   ");
-    PRINTK("---------    ----------   ----------  ----------   ---------  -----");
+    PRINTK("name\n");
+    PRINTK(" ---  -------- -------- ");
+    PRINTK("--------- --------- ---------- ---------- --------- ------ ");
 #if (LOSCFG_BASE_CORE_CPUP == 1)
-    PRINTK("  ------- ---------  ---------");
+    PRINTK("------- --------- --------  ");
 #endif /* LOSCFG_BASE_CORE_CPUP */
-    PRINTK("  ----\n");
+    PRINTK("----\n");
 }
 
 /*****************************************************************************
@@ -335,16 +334,14 @@ LITE_OS_SEC_TEXT_MINOR UINT32 OsGetAllTskInfo(VOID)
             continue;
         }
 
-        PRINTK("%d    %d    %s    0x%x    0x%x    0x%x    0x%x    0x%x    ",
+        semID = (taskCB->taskSem == NULL) ? OS_NULL_SHORT : (((LosSemCB *)taskCB->taskSem)->semID);
+        PRINTK("%4u%9u%10s%#10x%#10x%#11x%#11x%#10x%#7x",
                taskCB->taskID, taskCB->priority, OsConvertTskStatus(taskCB->taskStatus),
                taskCB->stackSize, OsGetTaskWaterLine(taskCB->taskID),
-               (UINT32)(UINTPTR)taskCB->stackPointer, taskCB->topOfStack, taskCB->eventMask);
-
-        semID = (taskCB->taskSem == NULL) ? OS_NULL_SHORT : (((LosSemCB *)taskCB->taskSem)->semID);
-        PRINTK("0x%x    ", semID);
+               (UINT32)(UINTPTR)taskCB->stackPointer, taskCB->topOfStack, taskCB->eventMask, semID);
 
 #if (LOSCFG_BASE_CORE_CPUP == 1)
-        PRINTK("%d.%d %d.%d %d.%d ",
+        PRINTK("%6u.%-2u%7u.%-2u%6u.%-2u ",
                cpuLessOneSec[taskCB->taskID].uwUsage / LOS_CPUP_PRECISION_MULT,
                cpuLessOneSec[taskCB->taskID].uwUsage % LOS_CPUP_PRECISION_MULT,
                cpuTenSec[taskCB->taskID].uwUsage / LOS_CPUP_PRECISION_MULT,
@@ -352,7 +349,7 @@ LITE_OS_SEC_TEXT_MINOR UINT32 OsGetAllTskInfo(VOID)
                cpuOneSec[taskCB->taskID].uwUsage / LOS_CPUP_PRECISION_MULT,
                cpuOneSec[taskCB->taskID].uwUsage % LOS_CPUP_PRECISION_MULT);
 #endif /* LOSCFG_BASE_CORE_CPUP */
-        PRINTK("%s\n", taskCB->taskName);
+        PRINTK("%-32s\n", taskCB->taskName);
     }
 
 #if (LOSCFG_BASE_CORE_CPUP == 1)