ref: 1d23f8a32e4a26c71b21376e21cf539aee95b831
dir: /pr_exec.c/
#include <u.h> #include <libc.h> #include "dat.h" #include "quakedef.h" #include "fns.h" typedef struct { int s; dfunction_t *f; } prstack_t; #define MAX_STACK_DEPTH 32 prstack_t pr_stack[MAX_STACK_DEPTH]; int pr_depth; #define LOCALSTACK_SIZE 2048 int localstack[LOCALSTACK_SIZE]; int localstack_used; qboolean pr_trace; dfunction_t *pr_xfunction; int pr_xstatement; int pr_argc; char *pr_opnames[] = { "DONE", "MUL_F", "MUL_V", "MUL_FV", "MUL_VF", "DIV", "ADD_F", "ADD_V", "SUB_F", "SUB_V", "EQ_F", "EQ_V", "EQ_S", "EQ_E", "EQ_FNC", "NE_F", "NE_V", "NE_S", "NE_E", "NE_FNC", "LE", "GE", "LT", "GT", "INDIRECT", "INDIRECT", "INDIRECT", "INDIRECT", "INDIRECT", "INDIRECT", "ADDRESS", "STORE_F", "STORE_V", "STORE_S", "STORE_ENT", "STORE_FLD", "STORE_FNC", "STOREP_F", "STOREP_V", "STOREP_S", "STOREP_ENT", "STOREP_FLD", "STOREP_FNC", "RETURN", "NOT_F", "NOT_V", "NOT_S", "NOT_ENT", "NOT_FNC", "IF", "IFNOT", "CALL0", "CALL1", "CALL2", "CALL3", "CALL4", "CALL5", "CALL6", "CALL7", "CALL8", "STATE", "GOTO", "AND", "OR", "BITAND", "BITOR" }; char *PR_GlobalString (int ofs); char *PR_GlobalStringNoContents (int ofs); //============================================================================= /* ================= PR_PrintStatement ================= */ void PR_PrintStatement (dstatement_t *s) { int i; if ( (unsigned)s->op < sizeof(pr_opnames)/sizeof(pr_opnames[0])) { Con_Printf ("%s ", pr_opnames[s->op]); i = strlen(pr_opnames[s->op]); for ( ; i<10 ; i++) Con_Printf (" "); } if (s->op == OP_IF || s->op == OP_IFNOT) Con_Printf ("%sbranch %d",PR_GlobalString(s->a),s->b); else if (s->op == OP_GOTO) { Con_Printf ("branch %d",s->a); } else if ( (unsigned)(s->op - OP_STORE_F) < 6) { Con_Printf ("%s",PR_GlobalString(s->a)); Con_Printf ("%s", PR_GlobalStringNoContents(s->b)); } else { if (s->a) Con_Printf ("%s",PR_GlobalString(s->a)); if (s->b) Con_Printf ("%s",PR_GlobalString(s->b)); if (s->c) Con_Printf ("%s", PR_GlobalStringNoContents(s->c)); } Con_Printf ("\n"); } /* ============ PR_StackTrace ============ */ void PR_StackTrace (void) { dfunction_t *f; int i; if (pr_depth == 0) { Con_Printf ("<NO STACK>\n"); return; } pr_stack[pr_depth].f = pr_xfunction; for (i=pr_depth ; i>=0 ; i--) { f = pr_stack[i].f; if (!f) { Con_Printf ("<NO FUNCTION>\n"); } else Con_Printf ("%12s : %s\n", PR_Str(f->s_file), PR_Str(f->s_name)); } } /* ============ PR_Profile_f ============ */ void PR_Profile_f (void) { dfunction_t *f, *best; int max; int num; int i; if (!sv.active) return; num = 0; do { max = 0; best = nil; for (i=0 ; i<progs->numfunctions ; i++) { f = &pr_functions[i]; if (f->profile > max) { max = f->profile; best = f; } } if (best) { if (num < 10) Con_Printf ("%7d %s\n", best->profile, PR_Str(best->s_name)); num++; best->profile = 0; } } while (best); } /* ============ PR_RunError Aborts the currently executing function ============ */ void PR_RunError (char *fmt, ...) { va_list arg; char s[1024]; va_start(arg, fmt); vsnprint(s, sizeof s, fmt, arg); va_end(arg); PR_PrintStatement(pr_statements + pr_xstatement); PR_StackTrace(); Con_Printf("%s\n", s); pr_depth = 0; // dump the stack so host_error can shutdown functions Host_Error("Program error"); } /* ============================================================================ PR_ExecuteProgram The interpretation main loop ============================================================================ */ /* ==================== PR_EnterFunction Returns the new program statement counter ==================== */ int PR_EnterFunction (dfunction_t *f) { int i, j, c, o; pr_stack[pr_depth].s = pr_xstatement; pr_stack[pr_depth].f = pr_xfunction; pr_depth++; if (pr_depth >= MAX_STACK_DEPTH) PR_RunError ("stack overflow"); // save off any locals that the new function steps on c = f->locals; if (localstack_used + c > LOCALSTACK_SIZE) PR_RunError ("PR_ExecuteProgram: locals stack overflow\n"); for (i=0 ; i < c ; i++) localstack[localstack_used+i] = ((int *)pr_globals)[f->parm_start + i]; localstack_used += c; // copy parameters o = f->parm_start; for (i=0 ; i<f->numparms ; i++) { for (j=0 ; j<f->parm_size[i] ; j++) { ((int *)pr_globals)[o] = ((int *)pr_globals)[OFS_PARM0+i*3+j]; o++; } } pr_xfunction = f; return f->first_statement - 1; // offset the s++ } /* ==================== PR_LeaveFunction ==================== */ int PR_LeaveFunction (void) { int i, c; if (pr_depth <= 0) fatal ("prog stack underflow"); // restore locals from the stack c = pr_xfunction->locals; localstack_used -= c; if (localstack_used < 0) PR_RunError ("PR_ExecuteProgram: locals stack underflow\n"); for (i=0 ; i < c ; i++) ((int *)pr_globals)[pr_xfunction->parm_start + i] = localstack[localstack_used+i]; // up stack pr_depth--; pr_xfunction = pr_stack[pr_depth].f; return pr_stack[pr_depth].s; } /* ==================== PR_ExecuteProgram ==================== */ void PR_ExecuteProgram (func_t fnum) { eval_t *a, *b, *c; int s; dstatement_t *st; dfunction_t *f, *newf; int runaway; int i; edict_t *ed; int exitdepth; eval_t *ptr; if (!fnum || fnum >= progs->numfunctions) { if (pr_global_struct->self) ED_Print (PROG_TO_EDICT(pr_global_struct->self)); Host_Error ("PR_ExecuteProgram: NULL function"); } f = &pr_functions[fnum]; runaway = 100000; pr_trace = false; // make a stack frame exitdepth = pr_depth; s = PR_EnterFunction (f); while (1) { s++; // next statement st = &pr_statements[s]; a = (eval_t *)&pr_globals[st->a]; b = (eval_t *)&pr_globals[st->b]; c = (eval_t *)&pr_globals[st->c]; if (!--runaway) PR_RunError ("runaway loop error"); pr_xfunction->profile++; pr_xstatement = s; if (pr_trace) PR_PrintStatement (st); switch (st->op) { case OP_ADD_F: c->_float = a->_float + b->_float; break; case OP_ADD_V: c->vector[0] = a->vector[0] + b->vector[0]; c->vector[1] = a->vector[1] + b->vector[1]; c->vector[2] = a->vector[2] + b->vector[2]; break; case OP_SUB_F: c->_float = a->_float - b->_float; break; case OP_SUB_V: c->vector[0] = a->vector[0] - b->vector[0]; c->vector[1] = a->vector[1] - b->vector[1]; c->vector[2] = a->vector[2] - b->vector[2]; break; case OP_MUL_F: c->_float = a->_float * b->_float; break; case OP_MUL_V: c->_float = a->vector[0]*b->vector[0] + a->vector[1]*b->vector[1] + a->vector[2]*b->vector[2]; break; case OP_MUL_FV: c->vector[0] = a->_float * b->vector[0]; c->vector[1] = a->_float * b->vector[1]; c->vector[2] = a->_float * b->vector[2]; break; case OP_MUL_VF: c->vector[0] = b->_float * a->vector[0]; c->vector[1] = b->_float * a->vector[1]; c->vector[2] = b->_float * a->vector[2]; break; case OP_DIV_F: c->_float = a->_float / b->_float; break; case OP_BITAND: c->_float = (int)a->_float & (int)b->_float; break; case OP_BITOR: c->_float = (int)a->_float | (int)b->_float; break; case OP_GE: c->_float = a->_float >= b->_float; break; case OP_LE: c->_float = a->_float <= b->_float; break; case OP_GT: c->_float = a->_float > b->_float; break; case OP_LT: c->_float = a->_float < b->_float; break; case OP_AND: c->_float = a->_float && b->_float; break; case OP_OR: c->_float = a->_float || b->_float; break; case OP_NOT_F: c->_float = !a->_float; break; case OP_NOT_V: c->_float = !a->vector[0] && !a->vector[1] && !a->vector[2]; break; case OP_NOT_S: c->_float = !a->string || !*PR_Str(a->string); break; case OP_NOT_FNC: c->_float = !a->function; break; case OP_NOT_ENT: c->_float = (PROG_TO_EDICT(a->edict) == sv.edicts); break; case OP_EQ_F: c->_float = a->_float == b->_float; break; case OP_EQ_V: c->_float = (a->vector[0] == b->vector[0]) && (a->vector[1] == b->vector[1]) && (a->vector[2] == b->vector[2]); break; case OP_EQ_S: c->_float = !strcmp(PR_Str(a->string),PR_Str(b->string)); break; case OP_EQ_E: c->_float = a->_int == b->_int; break; case OP_EQ_FNC: c->_float = a->function == b->function; break; case OP_NE_F: c->_float = a->_float != b->_float; break; case OP_NE_V: c->_float = (a->vector[0] != b->vector[0]) || (a->vector[1] != b->vector[1]) || (a->vector[2] != b->vector[2]); break; case OP_NE_S: c->_float = strcmp(PR_Str(a->string),PR_Str(b->string)); break; case OP_NE_E: c->_float = a->_int != b->_int; break; case OP_NE_FNC: c->_float = a->function != b->function; break; //================== case OP_STORE_F: case OP_STORE_ENT: case OP_STORE_FLD: // integers case OP_STORE_S: case OP_STORE_FNC: // pointers b->_int = a->_int; break; case OP_STORE_V: b->vector[0] = a->vector[0]; b->vector[1] = a->vector[1]; b->vector[2] = a->vector[2]; break; case OP_STOREP_F: case OP_STOREP_ENT: case OP_STOREP_FLD: // integers case OP_STOREP_S: case OP_STOREP_FNC: // pointers ptr = (eval_t *)((byte *)sv.edicts + b->_int); ptr->_int = a->_int; break; case OP_STOREP_V: ptr = (eval_t *)((byte *)sv.edicts + b->_int); ptr->vector[0] = a->vector[0]; ptr->vector[1] = a->vector[1]; ptr->vector[2] = a->vector[2]; break; case OP_ADDRESS: ed = PROG_TO_EDICT(a->edict); #ifdef PARANOID NUM_FOR_EDICT(ed); // make sure it's in range #endif if (ed == (edict_t *)sv.edicts && sv.state == ss_active) PR_RunError ("assignment to world entity"); c->_int = (byte *)((int *)&ed->v + b->_int) - (byte *)sv.edicts; break; case OP_LOAD_F: case OP_LOAD_FLD: case OP_LOAD_ENT: case OP_LOAD_S: case OP_LOAD_FNC: ed = PROG_TO_EDICT(a->edict); #ifdef PARANOID NUM_FOR_EDICT(ed); // make sure it's in range #endif a = (eval_t *)((int *)&ed->v + b->_int); c->_int = a->_int; break; case OP_LOAD_V: ed = PROG_TO_EDICT(a->edict); #ifdef PARANOID NUM_FOR_EDICT(ed); // make sure it's in range #endif a = (eval_t *)((int *)&ed->v + b->_int); c->vector[0] = a->vector[0]; c->vector[1] = a->vector[1]; c->vector[2] = a->vector[2]; break; //================== case OP_IFNOT: if (!a->_int) s += st->b - 1; // offset the s++ break; case OP_IF: if (a->_int) s += st->b - 1; // offset the s++ break; case OP_GOTO: s += st->a - 1; // offset the s++ break; case OP_CALL0: case OP_CALL1: case OP_CALL2: case OP_CALL3: case OP_CALL4: case OP_CALL5: case OP_CALL6: case OP_CALL7: case OP_CALL8: pr_argc = st->op - OP_CALL0; if (!a->function) PR_RunError ("NULL function"); newf = &pr_functions[a->function]; if (newf->first_statement < 0) { // negative statements are built in functions i = -newf->first_statement; if (i >= pr_numbuiltins) PR_RunError ("Bad builtin call number"); pr_builtins[i] (); break; } s = PR_EnterFunction (newf); break; case OP_DONE: case OP_RETURN: pr_globals[OFS_RETURN] = pr_globals[st->a]; pr_globals[OFS_RETURN+1] = pr_globals[st->a+1]; pr_globals[OFS_RETURN+2] = pr_globals[st->a+2]; s = PR_LeaveFunction (); if (pr_depth == exitdepth) return; // all done break; case OP_STATE: ed = PROG_TO_EDICT(pr_global_struct->self); ed->v.nextthink = pr_global_struct->time + 0.1; if (a->_float != ed->v.frame) { ed->v.frame = a->_float; } ed->v.think = b->function; break; default: PR_RunError ("Bad opcode %d", st->op); } } }