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#include "ravi_api.h"
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#define LUA_CORE
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#include "ravi_mirjit.h"
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#include "lua.h"
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#include "lapi.h"
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#include "lauxlib.h"
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#include "lfunc.h"
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#include "lmem.h"
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#include "lstring.h"
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#include "ltable.h"
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#include "lvm.h"
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#include <string.h>
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struct CompilerContext {
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lua_State* L;
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ravi_State* jit;
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Table* h; /* to avoid collection/reuse strings */
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};
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static void debug_message(void* context, const char* filename, long long line, const char* message) {
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struct CompilerContext* ccontext = (struct CompilerContext*)context;
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ravi_writestring(ccontext->L, filename, strlen(filename));
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char temp[80];
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snprintf(temp, sizeof temp, "%lld: ", line);
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ravi_writestring(ccontext->L, temp, strlen(temp));
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ravi_writestring(ccontext->L, message, strlen(message));
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ravi_writeline(ccontext->L);
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}
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void error_message(void* context, const char* message) {
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struct CompilerContext* ccontext = (struct CompilerContext*)context;
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ravi_writestring(ccontext->L, message, strlen(message));
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ravi_writeline(ccontext->L);
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}
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/* Create a new proto and insert it into parent's list of protos */
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static Proto* lua_newProto(void* context, Proto* parent) {
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struct CompilerContext* ccontext = (struct CompilerContext*)context;
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lua_State* L = ccontext->L;
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Proto* p = luaF_newproto(L);
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assert(parent);
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/* FIXME make this more efficient */
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int old_size = parent->sizep;
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int new_size = parent->sizep + 1;
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luaM_reallocvector(L, parent->p, old_size, new_size, Proto*);
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parent->p[old_size] = p;
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parent->sizep++;
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lua_assert(parent->sizep == new_size);
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luaC_objbarrier(L, parent, p);
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return p;
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}
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/*
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* Based off the Lua lexer code. Strings are anchored in a table initially - eventually
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* ending up either in a Proto constant table or some other structure related to
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* protos.
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*/
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TString* intern_string(lua_State* L, Table* h, const char* str, size_t l) {
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TValue* o; /* entry for 'str' */
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TString* ts = luaS_newlstr(L, str, l); /* create new string */
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setsvalue2s(L, L->top++, ts); /* temporarily anchor it in stack */
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o = luaH_set(L, h, L->top - 1);
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if (ttisnil(o)) { /* not in use yet? */
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/* boolean value does not need GC barrier;
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table has no metatable, so it does not need to invalidate cache */
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setbvalue(o, 1); /* t[string] = true */
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luaC_checkGC(L);
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}
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else { /* string already present */
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ts = tsvalue(keyfromval(o)); /* re-use value previously stored */
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}
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L->top--; /* remove string from stack */
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return ts;
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}
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/*
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** Add constant 'v' to prototype's list of constants (field 'k').
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** Use parser's table to cache position of constants in constant list
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** and try to reuse constants.
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*/
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static int add_konstant(lua_State* L, Proto* f, Table* h, TValue* key, TValue* v) {
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TValue* idx = luaH_set(L, h, key); /* The k index is cached against the key */
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int k, oldsize, newsize;
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if (ttisinteger(idx)) { /* is there an integer value index there? */
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k = cast_int(ivalue(idx));
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/* correct value? (warning: must distinguish floats from integers!) */
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if (k >= 0 && k < f->sizek && ttype(&f->k[k]) == ttype(v) && luaV_rawequalobj(&f->k[k], v))
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return k; /* reuse index */
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}
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/* constant not found; create a new entry in Proto->k */
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oldsize = k = f->sizek;
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newsize = oldsize + 1;
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/* numerical value does not need GC barrier;
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table has no metatable, so it does not need to invalidate cache */
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setivalue(idx, k);
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// FIXME make the allocation more efficient
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luaM_reallocvector(L, f->k, oldsize, newsize, TValue);
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setobj(L, &f->k[k], v); /* record the position k in the table against key */
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f->sizek++;
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lua_assert(f->sizek == newsize);
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luaC_barrier(L, f, v);
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return k;
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}
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/*
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** Add a string to list of constants and return its index.
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*/
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static int add_string_konstant(lua_State* L, Proto* p, Table* h, TString* s) {
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TValue o;
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setsvalue(L, &o, s);
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return add_konstant(L, p, h, &o, &o); /* use string itself as key */
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}
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/* Create a Lua TString object from a string. Save it so that we can avoid creating same
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* string again.
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*/
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static inline TString* create_luaString(lua_State* L, Table* h, struct string_object* s) {
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if (s->userdata == NULL) {
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/* Create and save it */
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s->userdata = intern_string(L, h, s->str, s->len);
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}
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return (TString*)s->userdata;
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}
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/* Add a string constant to Proto and return its index */
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static int lua_newStringConstant(void* context, Proto* proto, struct string_object* s) {
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struct CompilerContext* ccontext = (struct CompilerContext*)context;
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lua_State* L = ccontext->L;
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Table* h = ccontext->h;
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TString* ts = create_luaString(L, h, s);
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return add_string_konstant(L, proto, h, ts);
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}
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/* Add an upvalue. If the upvalue refers to a local variable in parent proto then idx should contain
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* the register for the local variable and instack should be true, else idx should have the index of
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* upvalue in parent proto and instack should be false.
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*/
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static int lua_addUpValue(void* context, Proto* f, struct string_object* name, unsigned idx, int instack, unsigned tc,
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struct string_object* usertype) {
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ravitype_t typecode = (ravitype_t)tc;
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struct CompilerContext* ccontext = (struct CompilerContext*)context;
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lua_State* L = ccontext->L;
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Table* h = ccontext->h;
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int oldsize = f->sizeupvalues;
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int newsize = oldsize + 1;
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int pos = oldsize;
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// checklimit(fs, fs->nups + 1, MAXUPVAL, "upvalues");
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// FIXME optimize the allocation
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luaM_reallocvector(L, f->upvalues, oldsize, newsize, Upvaldesc);
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f->sizeupvalues++;
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lua_assert(f->sizeupvalues == newsize);
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f->upvalues[pos].instack = cast_byte(instack); /* is the upvalue in parent function's local stack ? */
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f->upvalues[pos].idx = cast_byte(idx); /* If instack then parent's local register else parent's upvalue index */
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TString* tsname = create_luaString(L, h, name); /* name of the variable */
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f->upvalues[pos].name = tsname;
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f->upvalues[pos].ravi_type = typecode;
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if (usertype != NULL) {
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/* User type string goes into the proto's constant table */
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int kpos = lua_newStringConstant(context, f, usertype);
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f->upvalues[pos].usertype = tsvalue(&f->k[kpos]);
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}
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else {
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f->upvalues[pos].usertype = NULL;
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}
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luaC_objbarrier(L, f, tsname);
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return pos;
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}
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static void init_C_compiler(void* context) {
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struct CompilerContext* ccontext = (struct CompilerContext*)context;
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#ifdef USE_MIRJIT
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mir_prepare(ccontext->jit->jit, 2);
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#endif
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}
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static void* compile_C(void* context, const char* C_src, unsigned len) {
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struct CompilerContext* ccontext = (struct CompilerContext*)context;
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fprintf(stdout, "%s\n", C_src);
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#ifdef USE_MIRJIT
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return mir_compile_C_module(&ccontext->jit->options, ccontext->jit->jit, C_src, "input");
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#else
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return NULL;
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#endif
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}
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static void finish_C_compiler(void* context) {
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struct CompilerContext* ccontext = (struct CompilerContext*)context;
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#ifdef USE_MIRJIT
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mir_cleanup(ccontext->jit->jit);
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#endif
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}
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static lua_CFunction get_compiled_function(void* context, void* module, const char* name) {
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struct CompilerContext* ccontext = (struct CompilerContext*)context;
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#if USE_MIRJIT
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MIR_module_t M = (MIR_module_t)module;
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return (lua_CFunction)mir_get_func(ccontext->jit->jit, M, name);
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#else
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return NULL;
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#endif
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}
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static void lua_setProtoFunction(void* context, Proto* p, lua_CFunction func) {
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p->ravi_jit.jit_function = func;
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p->ravi_jit.jit_status = RAVI_JIT_COMPILED;
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}
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static void lua_setVarArg(void* context, Proto* p) { p->is_vararg = 1; }
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static void lua_setNumParams(void* context, Proto* p, unsigned num_params) { p->numparams = cast_byte(num_params); }
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static void lua_setMaxStackSize(void *context, Proto *p, unsigned max_stack_size) {
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p->maxstacksize = cast_byte(max_stack_size);
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}
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static int load_and_compile(lua_State* L) {
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const char* s = luaL_checkstring(L, 1);
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struct CompilerContext ccontext = {.L = L, .jit = G(L)->ravi_state};
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LClosure* cl = luaF_newLclosure(L, 1); /* create main closure with 1 up-value for _ENV */
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setclLvalue(L, L->top, cl); /* anchor it (to avoid being collected) */
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luaD_inctop(L);
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ccontext.h = luaH_new(L); /* create table for string constants */
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sethvalue(L, L->top, ccontext.h); /* anchor it */
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luaD_inctop(L);
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Proto* main_proto = cl->p = luaF_newproto(L);
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luaC_objbarrier(L, cl, cl->p);
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struct Ravi_CompilerInterface ravicomp_interface = {.source = s,
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.source_len = strlen(s),
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.source_name = "input",
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.main_proto = main_proto,
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.context = &ccontext,
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.lua_newProto = lua_newProto,
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.lua_newStringConstant = lua_newStringConstant,
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.lua_addUpValue = lua_addUpValue,
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.lua_setVarArg = lua_setVarArg,
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.lua_setProtoFunction = lua_setProtoFunction,
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.lua_setNumParams = lua_setNumParams,
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.lua_setMaxStackSize = lua_setMaxStackSize,
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.init_C_compiler = init_C_compiler,
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.compile_C = compile_C,
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.finish_C_compiler = finish_C_compiler,
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.get_compiled_function = get_compiled_function,
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.debug_message = debug_message,
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.error_message = error_message};
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int rc = raviX_compile(&ravicomp_interface);
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L->top--; /* remove table for string constants */
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if (rc == 0) {
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lua_assert(cl->nupvalues == cl->p->sizeupvalues);
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luaF_initupvals(L, cl);
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return 1;
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}
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else {
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lua_error(L);
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return 0;
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}
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}
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static const luaL_Reg ravilib[] = {{"load", load_and_compile}, {NULL, NULL}};
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int(raviopen_compiler)(lua_State* L) {
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luaL_newlib(L, ravilib);
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return 1;
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}
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Dibyendu Majumdar
4 years ago