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https://github.com/ENSL/NS.git
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56 lines
1.1 KiB
C
56 lines
1.1 KiB
C
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/*
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* trace.c -- a simple execution tracer for Lua
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*/
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#include <stdio.h>
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#include <string.h>
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#include "lua.h"
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#include "lualib.h"
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#include "lauxlib.h"
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static FILE* LOG; /* log file */
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static int I=0; /* indentation level */
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static void hook(lua_State *L, lua_Debug *ar)
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{
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const char* s="";
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switch (ar->event)
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{
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case LUA_HOOKTAILRET: ar->event=LUA_HOOKRET;
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case LUA_HOOKRET: s="return"; break;
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case LUA_HOOKCALL: s="call"; break;
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case LUA_HOOKLINE: s="line"; break;
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default: break;
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}
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fprintf(LOG,"[%d]\t%*s%s\t-- %d\n",I,I,"",s,ar->currentline);
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if (ar->event==LUA_HOOKCALL) ++I; else if (ar->event==LUA_HOOKRET) --I;
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}
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static void start_trace(lua_State *L, FILE* logfile)
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{
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lua_sethook(L,hook,LUA_MASKCALL | LUA_MASKRET | LUA_MASKLINE, 0);
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LOG=logfile;
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}
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static void stop_trace(lua_State *L)
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{
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lua_sethook(L,NULL,0,0);
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fclose(LOG);
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}
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int main(void)
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{
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int rc;
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lua_State *L=lua_open();
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lua_baselibopen(L);
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lua_tablibopen(L);
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lua_iolibopen(L);
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lua_strlibopen(L);
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lua_mathlibopen(L);
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lua_dblibopen(L);
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start_trace(L,stderr);
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rc=lua_dofile(L,NULL);
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stop_trace(L);
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return rc;
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}
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