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-rw-r--r--spec/util_debug_spec.lua93
-rw-r--r--util/debug.lua2
2 files changed, 94 insertions, 1 deletions
diff --git a/spec/util_debug_spec.lua b/spec/util_debug_spec.lua
new file mode 100644
index 00000000..510b7ac0
--- /dev/null
+++ b/spec/util_debug_spec.lua
@@ -0,0 +1,93 @@
+local dbg = require "util.debug";
+
+describe("util.debug", function ()
+ describe("traceback()", function ()
+ it("works", function ()
+ local tb = dbg.traceback();
+ assert.is_string(tb);
+ end);
+ end);
+ describe("get_traceback_table()", function ()
+ it("works", function ()
+ local count = 0;
+ -- MUST stay in sync with the line numbers of these functions:
+ local f1_defined, f3_defined = 43, 15;
+ local function f3(f3_param) --luacheck: ignore 212/f3_param
+ count = count + 1;
+
+ for i = 1, 2 do
+ local tb = dbg.get_traceback_table(i == 1 and coroutine.running() or nil, 0);
+ assert.is_table(tb);
+ --print(dbg.traceback(), "\n\n\n", require "util.serialization".serialize(tb, { fatal = false, unquoted = true}));
+ local found_f1, found_f3;
+ for _, frame in ipairs(tb) do
+ if frame.info.linedefined == f1_defined then
+ assert.equal(0, #frame.locals);
+ assert.equal("f2", frame.upvalues[1].name);
+ assert.equal("f1_upvalue", frame.upvalues[2].name);
+ found_f1 = true;
+ elseif frame.info.linedefined == f3_defined then
+ assert.equal("f3_param", frame.locals[1].name);
+ found_f3 = true;
+ end
+ end
+ assert.is_true(found_f1);
+ assert.is_true(found_f3);
+ end
+ end
+ local function f2()
+ local f2_local = "hello";
+ return f3(f2_local);
+ end
+ local f1_upvalue = "upvalue1";
+ local function f1()
+ f2(f1_upvalue);
+ end
+
+ -- ok/err are caught and re-thrown so that
+ -- busted gets to handle them in its own way
+ local ok, err;
+ local function hook()
+ debug.sethook();
+ ok, err = pcall(f1);
+ end
+
+ -- Test the traceback is correct in various
+ -- types of caller environments
+
+ -- From a Lua hook
+ debug.sethook(hook, "crl", 1);
+ local a = string.sub("abcdef", 3, 4);
+ assert.equal("cd", a);
+ debug.sethook();
+ assert.equal(1, count);
+
+ if not ok then
+ error(err);
+ end
+ ok, err = nil, nil;
+
+ -- From a signal handler (C hook)
+ require "util.signal".signal("SIGUSR1", hook);
+ require "util.signal".raise("SIGUSR1");
+ assert.equal(2, count);
+
+ if not ok then
+ error(err);
+ end
+ ok, err = nil, nil;
+
+ -- Inside a coroutine
+ local co = coroutine.create(function ()
+ hook();
+ end);
+ coroutine.resume(co);
+
+ if not ok then
+ error(err);
+ end
+
+ assert.equal(3, count);
+ end);
+ end);
+end);
diff --git a/util/debug.lua b/util/debug.lua
index 9a28395a..4c924d40 100644
--- a/util/debug.lua
+++ b/util/debug.lua
@@ -104,7 +104,7 @@ local function get_traceback_table(thread, start_level)
levels[(level-start_level)+1] = {
level = level;
info = info;
- locals = get_locals_table(thread, level+(thread and 0 or 1));
+ locals = get_locals_table(thread, level+1);
upvalues = get_upvalues_table(info.func);
};
end