[Libunwind-devel] how can used libuwind ?

[Yang Jie]

I use libuwind in openwrt like this :

https://github.com/openwrt/openwrt/tree/master/package/libs/libunwind

I run Gtest-trace for test, get this result:

Normal backtrace:

        normal trace:

        via backtrace():

        via unw_backtrace():

FAILURE: unw_step() loop and unw_backtrace() depths differ: 0 vs. 0

FAILURE: unw_step() loop and backtrace() depths differ: 0 vs. 0

Backtrace across signal handler:

sighandler: got signal 15, sp=0x7fcb7bd8

        normal trace:

        via backtrace():

        via unw_backtrace():

FAILURE: unw_step() loop and unw_backtrace() depths differ: 0 vs. 0

FAILURE: unw_step() loop and backtrace() depths differ: 0 vs. 0

Backtrace across signal handler on alternate stack:

sighandler: got signal 15, sp=0x77cf8ce8

        normal trace:

        via backtrace():

        via unw_backtrace():

FAILURE: unw_step() loop and unw_backtrace() depths differ: 0 vs. 0

FAILURE: unw_step() loop and backtrace() depths differ: 0 vs. 0

FAILURE: detected 6 errors

I run Gtest-bt for test, get this result:

Normal backtrace:

        explicit backtrace:

0000000000400df8 <main+0x438>                     (sp=000000007ffee7a0)

        via backtrace():

Backtrace across signal handler:

sighandler: got signal 15, sp=0x7ffee548

        explicit backtrace:

0000000000400df8 <main+0x438>                     (sp=000000007ffee448)

        via backtrace():

Backtrace across signal handler on alternate stack:

sighandler: got signal 15, sp=0x77768ce8

        explicit backtrace:

0000000000400df8 <main+0x438>                     (sp=0000000077768be8)

        via backtrace():

SUCCESS.

I used toolchain:

mipsel-openwrt-linux-uclibc-gcc

how can  solve this problem?