bus error on MacOS Snow Leopard in Lua->C->Lua callback
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- Subject: bus error on MacOS Snow Leopard in Lua->C->Lua callback
- From: Diab Jerius <dj@...>
- Date: 2011年9月14日 22:52:13 -0400
I'm flummoxed by this one.
My code invokes a Lua function from a C function called from Lua. The
Lua function updates a global table. On Linux (Debian Lenny) it works
fine. On MacOS Snow Leopard the update generates a Bus Error.
Linux:
% make -s -B plat=linux && env LUA_CPATH='./?.so' lua tifc.lua
%
MacOS:
% make -s -B plat=macos && env LUA_CPATH='./?.so' lua tifc.lua
Bus error
%
This is with lua 5.1.4.
This code is so simple I must be doing something obviously wrong. Would
someone please point out my error?
ifc.c:
-----------------------------------------------
#include <lua.h>
static int msg( lua_State *L ) { lua_call( L, 0, 0 ); return 0; }
int luaopen_ifc( lua_State *L ) {
lua_newtable( L );
lua_pushcfunction(L, msg );
lua_setfield( L, -2, "msg" );
return 1;
}
-----------------------------------------------
tifc.lua:
-----------------------------------------------
msg = require( 'ifc' ).msg
foo = {}
function cb( ) foo[#foo+1] = 1 end
msg( cb )
-----------------------------------------------
The Makefile: (invoke as make plat=linux or make plat=macos)
-----------------------------------------------
CFLAGS += -fPIC
LDFLAGS = -llua5.1
ifeq ($(plat),linux)
ifc.so : ifc.o
gcc -shared -fPIC -DPIC $< $(LDFLAGS) -o $@
endif
ifeq ($(plat),macos)
ifc.so : ifc.o
gcc -bundle $< $(LDFLAGS) -ldl -o $@
endif
-----------------------------------------------
Thanks!
Diab