[tarantool-patches] [PATCH 1/3] fiber: do not inline coro unwind function

[Georgy Kirichenko <georgy@tarantool.org>]

Call coro_unwcontext via function pointer to protect the
function from inlining.
---
 src/backtrace.cc | 7 ++++++-
 1 file changed, 6 insertions(+), 1 deletion(-)

diff --git a/src/backtrace.cc b/src/backtrace.cc
index 2512bc045..66dcc0047 100644
--- a/src/backtrace.cc
+++ b/src/backtrace.cc
@@ -363,12 +363,17 @@ __asm__ volatile(
 #endif
 }
 
+typedef void (*coro_unwcontext_indirect_f)(unw_context_t *unw_context,
+					   struct coro_context *coro_ctx);
+/* Variable to process coro_unwcontext indirect call to avoid inlining. */
+static volatile coro_unwcontext_indirect_f coro_unwcontext_indirect = coro_unwcontext;
+
 void
 backtrace_foreach(backtrace_cb cb, coro_context *coro_ctx, void *cb_ctx)
 {
 	unw_cursor_t unw_cur;
 	unw_context_t unw_ctx;
-	coro_unwcontext(&unw_ctx, coro_ctx);
+	coro_unwcontext_indirect(&unw_ctx, coro_ctx);
 	unw_init_local(&unw_cur, &unw_ctx);
 	int frame_no = 0;
 	unw_word_t sp = 0, old_sp = 0, ip, offset;
-- 
2.19.1