feat(debug): add print_traceback for debugging

apisix/debug.lua

@@ -77,6 +77,9 @@ local config_schema = {
                 is_print_return_value = {
                     type = "boolean",
                 },
+                is_print_traceback = {
+                    type = "boolean",
+                },
             }
         },
     },
@@ -192,6 +195,13 @@ local function apply_new_fun(module, fun_name, file_path, hook_conf)
             end
         end
 
+        if hook_conf.is_print_traceback then
+            if enable_by_hook or enable_by_header_filter then
+                log[log_level]("call require(\"", file_path, "\").", fun_name,
+                               "() call stack:", debug.traceback())
+            end
+        end
+
         local ret = {self.fun_org(...)}
         if hook_conf.is_print_return_value then
             if enable_by_hook or enable_by_header_filter then

t/debug/hook.t

@@ -151,3 +151,33 @@ hello world
 --- error_log
 read_debug_yaml(): failed to validate debug config property "hook_conf" is required
 --- wait: 3
+
+
+
+=== TEST 6: basic print_traceback enabled with static hook
+--- debug_config
+basic:
+  enable: true
+http_filter:
+  enable: false
+hook_conf:
+  enable: true
+  name: hook_test
+  log_level: warn
+  is_print_input_args: false
+  is_print_return_value: false
+  is_print_traceback: true
+
+hook_test:
+    apisix:
+    - http_access_phase
+
+#END
+--- request
+GET /hello
+--- more_headers
+Host: foo.com
+--- response_body
+hello world
+--- error_log
+call require("apisix").http_access_phase() call stack:stack traceback: