From: Tony Ambardar <[email protected]>
Use backtrace functions only with glibc and otherwise provide stubs in
test_progs.c. This avoids compile errors (e.g. with musl libc) like:
test_progs.c:13:10: fatal error: execinfo.h: No such file or directory
13 | #include <execinfo.h> /* backtrace */
| ^~~~~~~~~~~~
test_progs.c: In function 'crash_handler':
test_progs.c:1034:14: error: implicit declaration of function 'backtrace'
[-Werror=implicit-function-declaration]
1034 | sz = backtrace(bt, ARRAY_SIZE(bt));
| ^~~~~~~~~
test_progs.c:1045:9: error: implicit declaration of function
'backtrace_symbols_fd' [-Werror=implicit-function-declaration]
1045 | backtrace_symbols_fd(bt, sz, STDERR_FILENO);
| ^~~~~~~~~~~~~~~~~~~~
Fixes: 9fb156bb82a3 ("selftests/bpf: Print backtrace on SIGSEGV in test_progs")
Signed-off-by: Tony Ambardar <[email protected]>
---
tools/testing/selftests/bpf/test_progs.c | 9 ++++++++-
1 file changed, 8 insertions(+), 1 deletion(-)
diff --git a/tools/testing/selftests/bpf/test_progs.c
b/tools/testing/selftests/bpf/test_progs.c
index 60c5ec0f6abf..f6cfc6a8e8f0 100644
--- a/tools/testing/selftests/bpf/test_progs.c
+++ b/tools/testing/selftests/bpf/test_progs.c
@@ -10,7 +10,6 @@
#include <sched.h>
#include <signal.h>
#include <string.h>
-#include <execinfo.h> /* backtrace */
#include <sys/sysinfo.h> /* get_nprocs */
#include <netinet/in.h>
#include <sys/select.h>
@@ -19,6 +18,14 @@
#include <bpf/btf.h>
#include "json_writer.h"
+#ifdef __GLIBC__
+#include <execinfo.h> /* backtrace */
+#else
+#define backtrace(...) (0)
+#define backtrace_symbols_fd(bt, sz, fd) \
+ dprintf(fd, "<backtrace not supported>\n", bt, sz)
+#endif
+
static bool verbose(void)
{
return env.verbosity > VERBOSE_NONE;
--
2.34.1
