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authorGuillaume Solignac <gsoligna@cisco.com>2024-05-23 11:59:53 +0200
committerGuillaume Solignac <gsoligna@cisco.com>2024-05-23 13:56:28 +0200
commitf5df854389b8f2f2602d2aac8fec33fefdc45e59 (patch)
treea6d1f1db01ca225ceb0a1cc403869676618a6674 /src/vppinfra
parent5444973bd08ff8e9a103fb3436adbdcbb2f666b8 (diff)
vppinfra: support libunwind for backtrace
On non-glibc systems, execinfo is the only option available, but the lib is old and can crash when unwinding. We now can use libunwind to unroll it instead of using execinfo.h. Type: improvement Signed-off-by: Guillaume Solignac <gsoligna@cisco.com> Change-Id: I8b55f7aca97261a2efb5dca998889d5e0645939a
Diffstat (limited to 'src/vppinfra')
-rw-r--r--src/vppinfra/CMakeLists.txt4
-rw-r--r--src/vppinfra/backtrace.c9
2 files changed, 13 insertions, 0 deletions
diff --git a/src/vppinfra/CMakeLists.txt b/src/vppinfra/CMakeLists.txt
index 154e3a77cb1..a8c64a36121 100644
--- a/src/vppinfra/CMakeLists.txt
+++ b/src/vppinfra/CMakeLists.txt
@@ -234,9 +234,13 @@ if("${CMAKE_SYSTEM_NAME}" STREQUAL "FreeBSD")
else()
option(VPP_USE_EXTERNAL_LIBEXECINFO "Use external libexecinfo (useful for non-glibc targets)." OFF)
endif()
+option(VPP_USE_LIBUNWIND "Use libunwind for backtrace." OFF)
if(VPP_USE_EXTERNAL_LIBEXECINFO)
set(EXECINFO_LIB execinfo)
+elseif(VPP_USE_LIBUNWIND)
+ set(EXECINFO_LIB unwind)
+ add_compile_definitions(USE_LIBUNWIND)
endif()
add_vpp_library(vppinfra
SOURCES ${VPPINFRA_SRCS}
diff --git a/src/vppinfra/backtrace.c b/src/vppinfra/backtrace.c
index e713bae6876..bae563d04b0 100644
--- a/src/vppinfra/backtrace.c
+++ b/src/vppinfra/backtrace.c
@@ -219,8 +219,17 @@ backtrace_done:
#ifndef clib_backtrace_defined
#define clib_backtrace_defined
+#ifndef USE_LIBUNWIND
/* use glibc backtrace for stack trace */
#include <execinfo.h>
+#else
+#include <libunwind.h>
+static int
+backtrace (void **buffer, int size)
+{
+ return unw_backtrace (buffer, size);
+}
+#endif
__clib_export uword
clib_backtrace (uword * callers, uword max_callers, uword n_frames_to_skip)