static int currentline (StkId f) {
if (!isLmark(f))
return -1; /* only active lua functions have current-line information */
else {
CallInfo *ci = infovalue(f);
int *lineinfo = ci->func->f.l->lineinfo;
return luaG_getline(lineinfo, currentpc(f), 1, NULL);
}
}
static void traceexec (lua_State *L, StkId base, StkId top, lua_Hook linehook) {
CallInfo *ci = infovalue(base-1);
int *lineinfo = ci->func->f.l->lineinfo;
int pc = (*ci->pc - ci->func->f.l->code) - 1;
int newline;
if (pc == 0) { /* may be first time? */
ci->line = 1;
ci->refi = 0;
ci->lastpc = pc+1; /* make sure it will call linehook */
}
newline = luaG_getline(lineinfo, pc, ci->line, &ci->refi);
/* calls linehook when enters a new line or jumps back (loop) */
if (newline != ci->line || pc <= ci->lastpc) {
ci->line = newline;
L->top = top;
luaD_lineHook(L, base-2, newline, linehook);
}
ci->lastpc = pc;
}
static void PrintCode(const Proto* tf)
{
const Instruction* code=tf->code;
const Instruction* p=code;
for (;;)
{
int at=p-code+1;
Instruction i=*p;
int line=luaG_getline(tf->lineinfo,at-1,1,NULL);
printf("%6d\t",at);
if (line>=0) printf("[%d]\t",line); else printf("[-]\t");
switch (GET_OPCODE(i)) {
#include "print.h"
}
printf("\n");
if (i==OP_END) break;
p++;
}
}