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MINOR: hlua: don't dump empty entries in hlua_traceback()

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Calling hlua_traceback() sometimes reports empty entries looking like:

   [C]: ?

These ones correspond to certain internal C functions of the Lua library,
but they do not provide any information and even complicate the
interpretation of the dump. Better just skip them.
This commit is contained in:
Willy Tarreau 2022-06-19 17:35:53 +02:00
parent a892b7f15f
commit 5c143404ea
1 changed files with 8 additions and 5 deletions
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13
src/hlua.c
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@ -505,11 +505,6 @@ __LJMP const char *hlua_traceback(lua_State *L, const char* sep)
struct buffer *msg = get_trash_chunk(); struct buffer *msg = get_trash_chunk();
while (lua_getstack(L, level++, &ar)) { while (lua_getstack(L, level++, &ar)) {
/* Add separator */
if (b_data(msg))
chunk_appendf(msg, "%s", sep);
/* Fill fields: /* Fill fields:
* 'S': fills in the fields source, short_src, linedefined, lastlinedefined, and what; * 'S': fills in the fields source, short_src, linedefined, lastlinedefined, and what;
* 'l': fills in the field currentline; * 'l': fills in the field currentline;
@ -518,6 +513,14 @@ __LJMP const char *hlua_traceback(lua_State *L, const char* sep)
*/ */
lua_getinfo(L, "Slnt", &ar); lua_getinfo(L, "Slnt", &ar);
/* skip these empty entries, usually they come from deep C functions */
if (ar.currentline < 0 && *ar.what == 'C' && !*ar.namewhat && !ar.name)
continue;
/* Add separator */
if (b_data(msg))
chunk_appendf(msg, "%s", sep);
/* Append code localisation */ /* Append code localisation */
if (ar.currentline > 0) if (ar.currentline > 0)
chunk_appendf(msg, "%s:%d: ", ar.short_src, ar.currentline); chunk_appendf(msg, "%s:%d: ", ar.short_src, ar.currentline);