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commit 6909b5a2b443040e09b575a6f320cd60d7e619ff
parent 594d7266af6c0a899e5218df444178c16327563e
Author: Roberto Ierusalimschy <roberto@inf.puc-rio.br>
Date:   Mon,  8 Dec 2014 13:47:00 -0200

In 'debug.gethook', does not query hook table (which may not exist) if
there is no hook set

Diffstat:
Mldblib.c | 14++++++++------
1 file changed, 8 insertions(+), 6 deletions(-)

diff --git a/ldblib.c b/ldblib.c @@ -1,5 +1,5 @@ /* -** $Id: ldblib.c,v 1.145 2014/11/02 19:19:04 roberto Exp roberto $ +** $Id: ldblib.c,v 1.146 2014/11/10 14:27:16 roberto Exp roberto $ ** Interface from Lua to its debug API ** See Copyright Notice in lua.h */ @@ -345,10 +345,10 @@ static int db_sethook (lua_State *L) { lua_pushvalue(L, -1); lua_setmetatable(L, -2); /* setmetatable(hooktable) = hooktable */ } - lua_pushthread(L1); lua_xmove(L1, L, 1); /* key */ - lua_pushvalue(L, arg+1); /* value */ + lua_pushthread(L1); lua_xmove(L1, L, 1); /* key (thread) */ + lua_pushvalue(L, arg + 1); /* value (hook function) */ lua_rawset(L, -3); /* hooktable[L1] = new Lua hook */ - lua_sethook(L1, func, mask, count); /* set hooks */ + lua_sethook(L1, func, mask, count); return 0; } @@ -359,9 +359,11 @@ static int db_gethook (lua_State *L) { char buff[5]; int mask = lua_gethookmask(L1); lua_Hook hook = lua_gethook(L1); - if (hook != NULL && hook != hookf) /* external hook? */ + if (hook == NULL) /* no hook? */ + lua_pushnil(L); + else if (hook != hookf) /* external hook? */ lua_pushliteral(L, "external hook"); - else { + else { /* hook table must exist */ lua_rawgetp(L, LUA_REGISTRYINDEX, &HOOKKEY); lua_pushthread(L1); lua_xmove(L1, L, 1); lua_rawget(L, -2); /* 1st result = hooktable[L1] */