anchao opened a new pull request #3256:
URL: https://github.com/apache/incubator-nuttx/pull/3256
## Summary
libc/execinfo: add backstace support based on EABI Unwinder
libc/execinfo: add dump_stack support
1. Flags < -funwind-tables > is required
2. Keep the section ".exidx" in linker script
## Impact
N/A
## Testing
```
diff --git a/examples/hello/hello_main.c b/examples/hello/hello_main.c
index fcc04112..4b85a41b 100644
--- a/examples/hello/hello_main.c
+++ b/examples/hello/hello_main.c
@@ -24,6 +24,7 @@
#include <nuttx/config.h>
#include <stdio.h>
+#include <execinfo.h>
/****************************************************************************
* Public Functions
@@ -36,5 +37,6 @@
int main(int argc, FAR char *argv[])
{
printf("Hello, World!!\n");
+ dump_stack();
return 0;
}
```
```
ap> hello
Hello, World!!
[ 73.800676] [42] [ INFO] [BackTrace]: 0xc0d9bfe 0xc0f3330 0xc0dba0a
0x210838
```
```
$ arm-none-eabi-addr2line -e nuttx 0xc0d9bfe 0xc0f3330 0xc0dba0a 0x210838
nuttx/libs/libc/debug/lib_dumpstack.c:52
apps/examples/hello/hello_main.c:42
nuttx/libs/libc/sched/task_startup.c:165
nuttx/sched/task/task_start.c:144
```
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