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feat(esp_system): Print backtrace for both CPUs when cache error does not determine CPU

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This commit is contained in:
Konstantin Kondrashov
2024-08-07 19:17:52 +08:00
committed by BOT
parent e488d1945c
commit 271c611485
6 changed files with 113 additions and 11 deletions
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components/esp_system/port/arch/xtensa/panic_arch.c
+1
View File
@@ -341,6 +341,7 @@ static inline void print_cache_err_details(const void *f)
break;
case EXTMEM_DCACHE_WRITE_FLASH_ST:
panic_print_str("Write back error occurred while dcache tries to write back to flash\r\n");
panic_print_str("The following backtrace may not indicate the code that caused Cache invalid access\r\n");
break;
case EXTMEM_MMU_ENTRY_FAULT_ST:
vaddr = REG_READ(EXTMEM_CACHE_MMU_FAULT_VADDR_REG);
components/esp_system/port/panic_handler.c
+26 -11
View File
@@ -116,6 +116,14 @@ static void frame_to_panic_info(void *frame, panic_info_t *info, bool pseudo_exc
info->frame = frame;
}
#if !CONFIG_ESP_SYSTEM_SINGLE_CORE_MODE
FORCE_INLINE_ATTR __attribute__((__noreturn__))
void busy_wait(void)
{
while (1) {;} // infinite loop
}
#endif // !CONFIG_ESP_SYSTEM_SINGLE_CORE_MODE
static void panic_handler(void *frame, bool pseudo_excause)
{
panic_info_t info = { 0 };
@@ -133,17 +141,24 @@ static void panic_handler(void *frame, bool pseudo_excause)
// These are cases where both CPUs both go into panic handler. The following code ensures
// only one core proceeds to the system panic handler.
if (pseudo_excause) {
#define BUSY_WAIT_IF_TRUE(b) { if (b) while(1); }
// For WDT expiry, pause the non-offending core - offending core handles panic
BUSY_WAIT_IF_TRUE(panic_get_cause(frame) == PANIC_RSN_INTWDT_CPU0 && core_id == 1);
BUSY_WAIT_IF_TRUE(panic_get_cause(frame) == PANIC_RSN_INTWDT_CPU1 && core_id == 0);
// For cache error, pause the non-offending core - offending core handles panic
if (panic_get_cause(frame) == PANIC_RSN_CACHEERR && core_id != esp_cache_err_get_cpuid()) {
// Only print the backtrace for the offending core in case of the cache error
g_exc_frames[core_id] = NULL;
while (1) {
;
if (panic_get_cause(frame) == PANIC_RSN_INTWDT_CPU0 && core_id == 1) {
busy_wait();
} else if (panic_get_cause(frame) == PANIC_RSN_INTWDT_CPU1 && core_id == 0) {
busy_wait();
} else if (panic_get_cause(frame) == PANIC_RSN_CACHEERR) {
// The invalid cache access interrupt calls to the panic handler.
// When the cache interrupt happens, we can not determine the CPU where the
// invalid cache access has occurred.
if (esp_cache_err_get_cpuid() == -1) {
// We can not determine the CPU where the invalid cache access has occurred.
// Print backtraces for both CPUs.
if (core_id != 0) {
busy_wait();
}
} else if (core_id != esp_cache_err_get_cpuid()) {
g_exc_frames[core_id] = NULL; // Only print the backtrace for the offending core
busy_wait();
}
}
}
@@ -166,7 +181,7 @@ static void panic_handler(void *frame, bool pseudo_excause)
#if __XTENSA__
if (!(esp_ptr_executable(esp_cpu_pc_to_addr(panic_get_address(frame))) && (panic_get_address(frame) & 0xC0000000U))) {
/* Xtensa ABI sets the 2 MSBs of the PC according to the windowed call size
* Incase the PC is invalid, GDB will fail to translate addresses to function names
* In case the PC is invalid, GDB will fail to translate addresses to function names
* Hence replacing the PC to a placeholder address in case of invalid PC
*/
panic_set_address(frame, (uint32_t)&_invalid_pc_placeholder);