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Copy pathrdebug_visitor.cpp
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1168 lines (1117 loc) · 39 KB
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Copy pathrdebug_visitor.cpp
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1168 lines (1117 loc) · 39 KB
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#include <stdint.h>
#include <stdio.h>
#include <string.h>
#include <algorithm>
#include <bitset>
#include <cassert>
#include <limits>
#include "compat/internal.h"
#include "compat/table.h"
#include "rdebug_debughost.h"
#include "rdebug_lua.h"
#include "symbolize/symbolize.h"
#include "util/protected_area.h"
#include "util/refvalue.h"
#ifdef LUAJIT_VERSION
# include <lj_cdata.h>
# include <lj_debug.h>
#else
# include <lstate.h>
#endif
namespace luadebug::visitor {
static int debug_pcall(lua_State* hL, int nargs, int nresults, int errfunc) {
#ifdef LUAJIT_VERSION
global_State* g = G(hL);
bool needClean = !hook_active(g);
hook_enter(g);
int ok = lua_pcall(hL, nargs, nresults, errfunc);
if (needClean)
hook_leave(g);
#else
lu_byte oldah = hL->allowhook;
hL->allowhook = 0;
int ok = lua_pcall(hL, nargs, nresults, errfunc);
hL->allowhook = oldah;
#endif
return ok;
}
static int copy_to_dbg(lua_State* hL, luadbg_State* L, int idx = -1) {
int t = lua_type(hL, idx);
switch (t) {
case LUA_TNIL:
luadbg_pushnil(L);
break;
case LUA_TBOOLEAN:
luadbg_pushboolean(L, lua_toboolean(hL, idx));
break;
case LUA_TNUMBER:
#if LUA_VERSION_NUM >= 503 || defined(LUAJIT_VERSION)
if (lua_isinteger(hL, idx)) {
luadbg_pushinteger(L, lua_tointeger(hL, idx));
} else {
luadbg_pushnumber(L, lua_tonumber(hL, idx));
}
#else
luadbg_pushnumber(L, lua_tonumber(hL, idx));
#endif
break;
case LUA_TSTRING: {
size_t sz;
const char* str = lua_tolstring(hL, idx, &sz);
luadbg_pushlstring(L, str, sz);
break;
}
case LUA_TLIGHTUSERDATA:
luadbg_pushlightuserdata(L, lua_touserdata(hL, idx));
break;
default:
return LUA_TNONE;
}
return t;
}
static int copy_from_dbg(luadbg_State* L, lua_State* hL, protected_area& area, int idx) {
area.check_client_stack(1);
int t = luadbg_type(L, idx);
switch (t) {
case LUADBG_TNIL:
lua_pushnil(hL);
break;
case LUADBG_TBOOLEAN:
lua_pushboolean(hL, luadbg_toboolean(L, idx));
break;
case LUADBG_TNUMBER:
if (luadbg_isinteger(L, idx)) {
lua_pushinteger(hL, (lua_Integer)luadbg_tointeger(L, idx));
} else {
lua_pushnumber(hL, (lua_Number)luadbg_tonumber(L, idx));
}
break;
case LUADBG_TSTRING: {
size_t sz;
const char* str = luadbg_tolstring(L, idx, &sz);
lua_pushlstring(hL, str, sz);
break;
}
case LUADBG_TLIGHTUSERDATA:
lua_pushlightuserdata(hL, luadbg_touserdata(L, idx));
break;
case LUADBG_TUSERDATA: {
area.check_client_stack(3);
refvalue::value* v = (refvalue::value*)luadbg_touserdata(L, idx);
return refvalue::eval(v, hL);
}
default:
return LUADBG_TNONE;
}
return t;
}
static bool copy_from_dbg(luadbg_State* L, lua_State* hL, protected_area& area, int idx, int type) {
int t = copy_from_dbg(L, hL, area, idx);
if (t == type) {
return true;
}
if (t != LUADBG_TNONE) {
lua_pop(hL, 1);
}
return false;
}
static void copy_from_dbg_clonetable(luadbg_State* L, lua_State* hL, protected_area& area, int idx) {
if (copy_from_dbg(L, hL, area, idx) == LUADBG_TNONE) {
if (luadbg_type(L, idx) == LUADBG_TTABLE) {
idx = luadbg_absindex(L, idx);
area.check_client_stack(3);
lua_newtable(hL);
luadbg_pushnil(L);
while (luadbg_next(L, idx)) {
copy_from_dbg_clonetable(L, hL, area, -2);
copy_from_dbg_clonetable(L, hL, area, -1);
lua_rawset(hL, -3);
luadbg_pop(L, 1);
}
} else {
lua_pushnil(hL);
}
}
}
static void registry_table(lua_State* hL, refvalue::REGISTRY_TYPE type) {
switch (type) {
case refvalue::REGISTRY_TYPE::REGISTRY:
lua_pushvalue(hL, LUA_REGISTRYINDEX);
break;
case refvalue::REGISTRY_TYPE::DEBUG_REF:
if (lua::getfield(hL, LUA_REGISTRYINDEX, "__debugger_ref") == LUA_TNIL) {
lua_pop(hL, 1);
lua_newtable(hL);
lua_pushvalue(hL, -1);
lua_setfield(hL, LUA_REGISTRYINDEX, "__debugger_ref");
}
break;
case refvalue::REGISTRY_TYPE::DEBUG_WATCH:
if (lua::getfield(hL, LUA_REGISTRYINDEX, "__debugger_watch") == LUA_TNIL) {
lua_pop(hL, 1);
lua_newtable(hL);
lua_pushvalue(hL, -1);
lua_setfield(hL, LUA_REGISTRYINDEX, "__debugger_watch");
}
break;
default:
std::unreachable();
}
}
static int registry_ref(luadbg_State* L, lua_State* hL, refvalue::REGISTRY_TYPE type) {
int ref = luaL_ref(hL, -2);
if (ref <= 0) {
luadbg_pushnil(L);
return LUA_NOREF;
}
unsigned int index = table::array_base_zero() ? (unsigned int)(ref) : (unsigned int)(ref - 1);
const void* tv = lua_topointer(hL, -1);
if (!tv || index >= table::array_size(tv)) {
luadbg_pushnil(L);
return LUA_NOREF;
}
refvalue::create(L, refvalue::TABLE_ARRAY { index }, refvalue::REGISTRY { type });
return ref;
}
void registry_unref(lua_State* hL, int ref) {
if (ref >= 0) {
if (lua::getfield(hL, LUA_REGISTRYINDEX, "__debugger_ref") == LUA_TTABLE) {
luaL_unref(hL, -1, ref);
}
lua_pop(hL, 1);
}
}
int copy_to_dbg_ref(lua_State* hL, luadbg_State* L) {
if (copy_to_dbg(hL, L) != LUA_TNONE) {
return LUA_NOREF;
}
registry_table(hL, refvalue::REGISTRY_TYPE::DEBUG_REF);
lua_pushvalue(hL, -2);
int ref = registry_ref(L, hL, refvalue::REGISTRY_TYPE::DEBUG_REF);
lua_pop(hL, 1);
return ref;
}
template <bool getref = true>
static int visitor_getlocal(luadbg_State* L, lua_State* hL, protected_area& area) {
auto frame = area.checkinteger<uint16_t>(L, 1);
auto n = area.checkinteger<int16_t>(L, 2);
lua_Debug ar;
if (lua_getstack(hL, frame, &ar) == 0) {
return 0;
}
area.check_client_stack(1);
const char* name = lua::lua_getlocal(hL, &ar, n);
if (name == NULL)
return 0;
if (!getref && copy_to_dbg(hL, L) != LUA_TNONE) {
lua_pop(hL, 1);
luadbg_pushstring(L, name);
luadbg_insert(L, -2);
return 2;
}
lua_pop(hL, 1);
luadbg_pushstring(L, name);
refvalue::create(L, refvalue::FRAME_LOCAL { frame, n });
return 2;
}
template <bool getref = true>
static int visitor_field(luadbg_State* L, lua_State* hL, protected_area& area) {
auto field = area.checkstring(L, 2);
if (!copy_from_dbg(L, hL, area, 1, LUADBG_TTABLE)) {
return 0;
}
area.check_client_stack(1);
lua_pushlstring(hL, field.data(), field.size());
lua_rawget(hL, -2);
if (!getref && copy_to_dbg(hL, L) != LUA_TNONE) {
lua_pop(hL, 2);
return 1;
}
lua_pop(hL, 1);
const void* tv = lua_topointer(hL, -1);
if (!tv) {
lua_pop(hL, 1);
return 0;
}
//
// 使用简单的O(n)算法查找field，可以更好地保证兼容性。
// field目前只在很少的场景使用，所以不用在意性能。
//
lua_pushlstring(hL, field.data(), field.size());
lua_insert(hL, -2);
unsigned int hsize = table::hash_size(tv);
for (unsigned int i = 0; i < hsize; ++i) {
if (table::get_hash_k(hL, tv, i)) {
if (lua_rawequal(hL, -1, -3)) {
refvalue::create(L, 1, refvalue::TABLE_HASH_VAL { i });
lua_pop(hL, 3);
return 1;
}
lua_pop(hL, 1);
}
}
lua_pop(hL, 2);
return 0;
}
template <bool getref = true>
static int visitor_userdata_pairs(luadbg_State* L, lua_State* hL, protected_area& area) {
area.check_client_stack(4);
if (!copy_from_dbg(L, hL, area, 1, LUADBG_TUSERDATA)) {
return 0;
}
if (!lua_getmetatable(hL, -1)) {
lua_pop(hL, 1);
return 0;
}
lua_getfield(hL, -1, "__pairs");
if (LUA_TFUNCTION != lua_type(hL, -1)) {
lua_pop(hL, 3);
return 0;
}
lua_remove(hL, -2);
lua_insert(hL, -2);
if (debug_pcall(hL, 1, 3, 0)) {
lua_pop(hL, 1);
return 0;
}
luadbg_newtable(L);
luadbg_Integer n = 0;
unsigned int index = 0;
for (;;) {
// next, t, k
lua_pushvalue(hL, -3);
lua_pushvalue(hL, -3);
lua_pushvalue(hL, -3);
lua_remove(hL, -4);
// next, t, next, t, k
if (debug_pcall(hL, 2, 2, 0)) {
lua_pop(hL, 3);
return 0;
}
// next, t, k, v
if (lua_isnoneornil(hL, -2)) {
lua_pop(hL, 4);
return 1;
}
if (copy_to_dbg(hL, L, -2) == LUA_TNONE) {
refvalue::create(L, 1, refvalue::USERDATA_KEY { index });
}
luadbg_rawseti(L, -2, ++n);
if (getref) {
refvalue::create(L, 1, refvalue::USERDATA_VAL { index });
if (copy_to_dbg(hL, L, -1) == LUA_TNONE) {
luadbg_pushvalue(L, -1);
}
luadbg_rawseti(L, -3, ++n);
} else {
if (copy_to_dbg(hL, L, -1) == LUA_TNONE) {
refvalue::create(L, 1, refvalue::USERDATA_VAL { index });
}
}
luadbg_rawseti(L, -2, ++n);
lua_pop(hL, 1);
++index;
}
}
template <bool getref = true>
static int visitor_tablearray(luadbg_State* L, lua_State* hL, protected_area& area) {
unsigned int i = area.optinteger<unsigned int>(L, 2, 0);
unsigned int j = area.optinteger<unsigned int>(L, 3, (std::numeric_limits<unsigned int>::max)());
area.check_client_stack(4);
if (!copy_from_dbg(L, hL, area, 1, LUADBG_TTABLE)) {
return 0;
}
const void* tv = lua_topointer(hL, -1);
if (!tv) {
lua_pop(hL, 1);
return 0;
}
luadbg_newtable(L);
luadbg_Integer n = 0;
unsigned int maxn = table::array_size(tv);
if (maxn == 0) {
lua_pop(hL, 1);
return 1;
}
j = (std::min)(j, maxn - 1);
for (; i <= j; ++i) {
bool ok = table::get_array(hL, tv, i);
(void)ok;
assert(ok);
if (getref) {
refvalue::create(L, 1, refvalue::TABLE_ARRAY { i });
if (copy_to_dbg(hL, L) == LUA_TNONE) {
luadbg_pushvalue(L, -1);
}
luadbg_rawseti(L, -3, ++n);
} else {
if (copy_to_dbg(hL, L) == LUA_TNONE) {
refvalue::create(L, 1, refvalue::TABLE_ARRAY { i });
}
}
luadbg_rawseti(L, -2, ++n);
lua_pop(hL, 1);
}
lua_pop(hL, 1);
return 1;
}
template <bool getref = true>
static int visitor_tablehash(luadbg_State* L, lua_State* hL, protected_area& area) {
unsigned int i = area.optinteger<unsigned int>(L, 2, 0);
unsigned int j = area.optinteger<unsigned int>(L, 3, (std::numeric_limits<unsigned int>::max)());
area.check_client_stack(4);
if (!copy_from_dbg(L, hL, area, 1, LUADBG_TTABLE)) {
return 0;
}
const void* tv = lua_topointer(hL, -1);
if (!tv) {
lua_pop(hL, 1);
return 0;
}
luadbg_newtable(L);
luadbg_Integer n = 0;
unsigned int maxn = table::hash_size(tv);
if (maxn == 0) {
lua_pop(hL, 1);
return 1;
}
j = (std::min)(j, maxn - 1);
for (; i <= j; ++i) {
if (table::get_hash_kv(hL, tv, i)) {
if (copy_to_dbg(hL, L) == LUA_TNONE) {
refvalue::create(L, 1, refvalue::TABLE_HASH_KEY { i });
}
luadbg_rawseti(L, -2, ++n);
lua_pop(hL, 1);
if (getref) {
refvalue::create(L, 1, refvalue::TABLE_HASH_VAL { i });
if (copy_to_dbg(hL, L) == LUA_TNONE) {
luadbg_pushvalue(L, -1);
}
luadbg_rawseti(L, -3, ++n);
} else {
if (copy_to_dbg(hL, L) == LUA_TNONE) {
refvalue::create(L, 1, refvalue::TABLE_HASH_VAL { i });
}
}
luadbg_rawseti(L, -2, ++n);
lua_pop(hL, 1);
}
}
lua_pop(hL, 1);
return 1;
}
static int visitor_tablesize(luadbg_State* L, lua_State* hL, protected_area& area) {
if (!copy_from_dbg(L, hL, area, 1, LUADBG_TTABLE)) {
return 0;
}
const void* t = lua_topointer(hL, -1);
if (!t) {
lua_pop(hL, 1);
return 0;
}
luadbg_pushinteger(L, table::array_size(t));
luadbg_pushinteger(L, table::hash_size(t));
lua_pop(hL, 1);
return 2;
}
static int visitor_udread(luadbg_State* L, lua_State* hL, protected_area& area) {
auto offset = area.checkinteger<luadbg_Integer>(L, 2);
auto count = area.checkinteger<luadbg_Integer>(L, 3);
if (!copy_from_dbg(L, hL, area, 1, LUADBG_TUSERDATA)) {
return 0;
}
const char* memory = (const char*)lua_touserdata(hL, -1);
size_t len = (size_t)lua_rawlen(hL, -1);
if (offset < 0 || (size_t)offset >= len || count <= 0) {
lua_pop(hL, 1);
return 0;
}
if ((size_t)(offset + count) > len) {
count = (luadbg_Integer)len - offset;
}
luadbg_pushlstring(L, memory + offset, (size_t)count);
lua_pop(hL, 1);
return 1;
}
static int visitor_udwrite(luadbg_State* L, lua_State* hL, protected_area& area) {
auto offset = area.checkinteger<luadbg_Integer>(L, 2);
auto data = area.checkstring(L, 3);
int allowPartial = luadbg_toboolean(L, 4);
if (!copy_from_dbg(L, hL, area, 1, LUADBG_TUSERDATA)) {
return 0;
}
const char* memory = (const char*)lua_touserdata(hL, -1);
size_t len = (size_t)lua_rawlen(hL, -1);
if (allowPartial) {
if (offset < 0 || (size_t)offset >= len) {
lua_pop(hL, 1);
luadbg_pushinteger(L, 0);
return 1;
}
size_t bytesWritten = (std::min)(data.size(), (size_t)(len - offset));
memcpy((void*)(memory + offset), data.data(), bytesWritten);
lua_pop(hL, 1);
luadbg_pushinteger(L, bytesWritten);
return 1;
} else {
if (offset < 0 || (size_t)offset + data.size() > len) {
lua_pop(hL, 1);
return 0;
}
memcpy((void*)(memory + offset), data.data(), data.size());
lua_pop(hL, 1);
luadbg_pushboolean(L, 1);
return 1;
}
}
static int visitor_type(luadbg_State* L, lua_State* hL, protected_area& area) {
switch (luadbg_type(L, 1)) {
case LUADBG_TNIL:
luadbg_pushstring(L, "nil");
return 1;
case LUADBG_TBOOLEAN:
luadbg_pushstring(L, "boolean");
return 1;
case LUADBG_TSTRING:
luadbg_pushstring(L, "string");
return 1;
case LUADBG_TLIGHTUSERDATA:
luadbg_pushstring(L, "lightuserdata");
return 1;
case LUADBG_TNUMBER:
#if LUA_VERSION_NUM >= 503 || defined(LUAJIT_VERSION)
if (luadbg_isinteger(L, 1)) {
luadbg_pushstring(L, "integer");
} else {
luadbg_pushstring(L, "float");
}
#else
luadbg_pushstring(L, "float");
#endif
return 1;
case LUADBG_TUSERDATA:
break;
default:
luadbg_pushstring(L, "unexpected");
return 1;
}
area.check_client_stack(3);
refvalue::value* v = (refvalue::value*)luadbg_touserdata(L, 1);
int t = refvalue::eval(v, hL);
switch (t) {
case LUA_TNONE:
luadbg_pushstring(L, "unknown");
return 1;
case LUA_TFUNCTION:
if (lua_iscfunction(hL, -1)) {
luadbg_pushstring(L, "c function");
} else {
luadbg_pushstring(L, "function");
}
break;
case LUA_TNUMBER:
#if LUA_VERSION_NUM >= 503 || defined(LUAJIT_VERSION)
if (lua_isinteger(hL, -1)) {
luadbg_pushstring(L, "integer");
} else {
luadbg_pushstring(L, "float");
}
#else
luadbg_pushstring(L, "float");
#endif
break;
case LUA_TLIGHTUSERDATA:
luadbg_pushstring(L, "lightuserdata");
break;
#ifdef LUAJIT_VERSION
case LUA_TCDATA:
luadbg_pushstring(L, lua_cdatatype(hL, -1));
break;
#endif
default:
luadbg_pushstring(L, lua_typename(hL, t));
break;
}
lua_pop(hL, 1);
return 1;
}
static int visitor_value(luadbg_State* L, lua_State* hL, protected_area& area) {
switch (luadbg_type(L, 1)) {
case LUADBG_TNIL:
luadbg_pushstring(L, "nil");
luadbg_pushvalue(L, 1);
return 2;
case LUADBG_TBOOLEAN:
luadbg_pushstring(L, "boolean");
luadbg_pushvalue(L, 1);
return 2;
case LUADBG_TSTRING:
luadbg_pushstring(L, "string");
luadbg_pushvalue(L, 1);
return 2;
case LUADBG_TLIGHTUSERDATA:
luadbg_pushstring(L, "lightuserdata");
luadbg_pushvalue(L, 1);
return 2;
case LUADBG_TNUMBER:
#if LUA_VERSION_NUM >= 503 || defined(LUAJIT_VERSION)
if (luadbg_isinteger(L, 1)) {
luadbg_pushstring(L, "integer");
luadbg_pushvalue(L, 1);
return 2;
}
#endif
luadbg_pushstring(L, "float");
luadbg_pushvalue(L, 1);
return 2;
case LUADBG_TUSERDATA:
break;
default:
luadbg_pushstring(L, "unexpected");
luadbg_pushnil(L);
return 2;
}
area.check_client_stack(3);
refvalue::value* v = (refvalue::value*)luadbg_touserdata(L, 1);
int t = refvalue::eval(v, hL);
switch (t) {
case LUA_TNONE:
luadbg_pushstring(L, "unknown");
luadbg_pushnil(L);
return 2;
case LUA_TFUNCTION:
if (lua_iscfunction(hL, -1)) {
luadbg_pushstring(L, "c function");
} else {
luadbg_pushstring(L, "function");
}
break;
case LUA_TNUMBER:
#if LUA_VERSION_NUM >= 503 || defined(LUAJIT_VERSION)
if (lua_isinteger(hL, -1)) {
luadbg_pushstring(L, "integer");
break;
}
#endif
luadbg_pushstring(L, "float");
break;
case LUA_TLIGHTUSERDATA:
luadbg_pushstring(L, "lightuserdata");
break;
#ifdef LUAJIT_VERSION
case LUA_TCDATA:
luadbg_pushstring(L, lua_cdatatype(hL, -1));
break;
#endif
default:
luadbg_pushstring(L, lua_typename(hL, t));
break;
}
if (copy_to_dbg(hL, L) == LUA_TNONE) {
luadbg_pushfstring(L, "%p", lua_topointer(hL, -1));
}
lua_pop(hL, 1);
return 2;
}
static int visitor_equal(luadbg_State* L, lua_State* hL, protected_area& area) {
if (luadbg_type(L, 1) != luadbg_type(L, 2)) {
luadbg_pushboolean(L, 0);
return 1;
}
if (luadbg_type(L, 1) != LUADBG_TUSERDATA) {
luadbg_pushboolean(L, luadbg_rawequal(L, 1, 2));
return 1;
}
area.check_client_stack(3);
if (refvalue::eval((refvalue::value*)luadbg_touserdata(L, 1), hL) == LUA_TNONE) {
luadbg_pushboolean(L, 0);
return 1;
}
if (refvalue::eval((refvalue::value*)luadbg_touserdata(L, 2), hL) == LUA_TNONE) {
lua_pop(hL, 1);
luadbg_pushboolean(L, 0);
return 1;
}
if (lua_type(hL, -1) != lua_type(hL, -2)) {
lua_pop(hL, 2);
luadbg_pushboolean(L, 0);
return 1;
}
luadbg_pushboolean(L, lua_rawequal(hL, -1, -2));
lua_pop(hL, 2);
return 1;
}
static int visitor_tostring(luadbg_State* L, lua_State* hL, protected_area& area) {
switch (luadbg_type(L, 1)) {
case LUADBG_TNIL:
luadbg_pushstring(L, "nil");
return 1;
case LUADBG_TBOOLEAN:
luadbg_pushstring(L, luadbg_toboolean(L, 1) ? "true" : "false");
return 1;
case LUADBG_TNUMBER:
if (luadbg_isinteger(L, 1)) {
luadbg_pushfstring(L, "%d", luadbg_tointeger(L, 1));
return 1;
}
luadbg_pushfstring(L, "%f", luadbg_tonumber(L, 1));
return 1;
case LUADBG_TSTRING:
luadbg_settop(L, 1);
return 1;
case LUADBG_TLIGHTUSERDATA:
luadbg_pushfstring(L, "lightuserdata: %p", luadbg_topointer(L, 1));
return 1;
default:
luadbg_pushnil(L);
return 1;
case LUADBG_TUSERDATA:
break;
}
area.check_client_stack(3);
refvalue::value* v = (refvalue::value*)luadbg_touserdata(L, 1);
if (refvalue::eval(v, hL) == LUA_TNONE) {
luadbg_pushstring(L, "nil");
return 1;
}
switch (lua_type(hL, -1)) {
case LUADBG_TNIL:
luadbg_pushstring(L, "nil");
break;
case LUADBG_TBOOLEAN:
luadbg_pushstring(L, lua_toboolean(hL, -1) ? "true" : "false");
break;
case LUADBG_TNUMBER:
#if LUA_VERSION_NUM >= 503 || defined(LUAJIT_VERSION)
if (lua_isinteger(hL, -1)) {
luadbg_pushfstring(L, "%d", lua_tointeger(hL, -1));
break;
}
#endif
luadbg_pushfstring(L, "%f", lua_tonumber(hL, -1));
break;
case LUADBG_TSTRING: {
size_t sz;
const char* str = lua_tolstring(hL, -1, &sz);
luadbg_pushlstring(L, str, sz);
break;
}
case LUADBG_TLIGHTUSERDATA:
luadbg_pushfstring(L, "lightuserdata: %p", lua_topointer(hL, -1));
break;
default:
luadbg_pushfstring(L, "%s: %p", lua_typename(hL, lua_type(hL, -1)), lua_topointer(hL, -1));
break;
}
lua_pop(hL, 1);
return 1;
}
static int visitor_assign(luadbg_State* L, lua_State* hL, protected_area& area) {
area.check_type(L, 1, LUADBG_TUSERDATA);
area.check_client_stack(3);
if (copy_from_dbg(L, hL, area, 1) == LUADBG_TNONE) {
return 0;
}
if (copy_from_dbg(L, hL, area, 2) == LUADBG_TNONE) {
lua_pop(hL, 1);
return 0;
}
refvalue::value* ref = (refvalue::value*)luadbg_touserdata(L, 1);
luadbg_pushboolean(L, refvalue::assign(ref, hL));
return 1;
}
static int visitor_assign_field(luadbg_State* L, lua_State* hL, protected_area& area) {
area.check_type(L, 1, LUADBG_TUSERDATA);
area.check_client_stack(3);
auto field = area.checkstring(L, 2);
if (copy_from_dbg(L, hL, area, 1) == LUADBG_TNONE) {
return 0;
}
lua_pushlstring(hL, field.data(), field.size());
if (copy_from_dbg(L, hL, area, 3) == LUADBG_TNONE) {
lua_pop(hL, 2);
return 0;
}
lua_rawset(hL, -3);
lua_pop(hL, 1);
return 0;
}
template <bool getref = true>
static int visitor_getupvalue(luadbg_State* L, lua_State* hL, protected_area& area) {
auto index = area.checkinteger<int>(L, 2);
if (!copy_from_dbg(L, hL, area, 1, LUADBG_TFUNCTION)) {
return 0;
}
const char* name = lua_getupvalue(hL, -1, index);
if (name == NULL) {
lua_pop(hL, 1);
return 0;
}
if (!getref && copy_to_dbg(hL, L) != LUA_TNONE) {
lua_pop(hL, 2);
luadbg_pushstring(L, name);
luadbg_insert(L, -2);
return 2;
}
lua_pop(hL, 2);
luadbg_pushstring(L, name);
refvalue::create(L, 1, refvalue::UPVALUE { index });
return 2;
}
template <bool getref = true>
static int visitor_getmetatable(luadbg_State* L, lua_State* hL, protected_area& area) {
area.check_client_stack(2);
int t = copy_from_dbg(L, hL, area, 1);
if (t == LUADBG_TNONE) {
return 0;
}
if (!getref) {
if (lua_getmetatable(hL, -1) == 0) {
lua_pop(hL, 1);
return 0;
}
lua_pop(hL, 2);
} else {
lua_pop(hL, 1);
}
if (t == LUADBG_TTABLE || t == LUADBG_TUSERDATA) {
refvalue::create(L, 1, refvalue::METATABLE { t });
return 1;
} else {
luadbg_pop(L, 1);
refvalue::create(L, refvalue::METATABLE { t });
return 1;
}
}
template <bool getref = true>
static int visitor_getuservalue(luadbg_State* L, lua_State* hL, protected_area& area) {
int n = area.optinteger<int>(L, 2, 1);
area.check_client_stack(2);
if (!copy_from_dbg(L, hL, area, 1, LUADBG_TUSERDATA)) {
return 0;
}
if (!getref) {
if (lua_getiuservalue(hL, -1, n) == LUA_TNONE) {
lua_pop(hL, 2);
return 0;
}
if (copy_to_dbg(hL, L) != LUA_TNONE) {
lua_pop(hL, 2);
luadbg_pushboolean(L, 1);
return 2;
}
lua_pop(hL, 1);
}
lua_pop(hL, 1);
refvalue::create(L, 1, refvalue::USERVALUE { n });
luadbg_pushboolean(L, 1);
return 2;
}
static int visitor_getinfo(luadbg_State* L, lua_State* hL, protected_area& area) {
auto options = area.checkstring(L, 2);
if (luadbg_type(L, 3) != LUA_TTABLE) {
luadbg_createtable(L, 0, 16);
luadbg_replace(L, 3);
}
std::bitset<128> flags;
for (const char* what = options.data(); *what; what++) {
flags.set(uint8_t(*what) & 0x7F, true);
}
lua_Debug ar;
int frame = 0;
#if LUA_VERSION_NUM == 501
uint8_t nparams = 0;
#endif
switch (luadbg_type(L, 1)) {
case LUADBG_TNUMBER:
frame = area.checkinteger<int>(L, 1);
if (lua_getstack(hL, frame, &ar) == 0)
return 0;
if (lua_getinfo(hL, options.data(), &ar) == 0)
return 0;
#if LUA_VERSION_NUM == 501
if (flags.test('u')) {
Proto* proto = lua_ci2proto(lua_debug2ci(hL, &ar));
if (proto) {
nparams = proto->numparams;
}
}
#endif
if (flags.test('f')) lua_pop(hL, 1);
break;
case LUADBG_TUSERDATA: {
if (!copy_from_dbg(L, hL, area, 1, LUADBG_TFUNCTION)) {
return area.raise_error("Need a function ref");
}
if (flags.test('f')) {
return area.raise_error("invalid option");
}
char what[8];
what[0] = '>';
strcpy(what + 1, options.data());
#if LUA_VERSION_NUM == 501
if (flags.test('u')) {
Proto* proto = lua_getproto(hL, -1);
if (proto) {
nparams = proto->numparams;
}
}
#endif
if (lua_getinfo(hL, what, &ar) == 0) {
return 0;
}
break;
}
default:
return area.raise_error("Need stack level (integer) or function ref");
}
#ifdef LUAJIT_VERSION
if (flags.test('S') && strcmp(ar.what, "main") == 0) {
// carzy bug,luajit is real linedefined in main file,but in lua it's zero
// maybe fix it is a new bug
ar.lastlinedefined = 0;
}
#endif
for (const char* what = options.data(); *what; what++) {
switch (*what) {
case 'S':
#if LUA_VERSION_NUM >= 504
luadbg_pushlstring(L, ar.source, ar.srclen);
#else
luadbg_pushstring(L, ar.source);
#endif
luadbg_setfield(L, 3, "source");
luadbg_pushstring(L, ar.short_src);
luadbg_setfield(L, 3, "short_src");
luadbg_pushinteger(L, ar.linedefined);
luadbg_setfield(L, 3, "linedefined");
luadbg_pushinteger(L, ar.lastlinedefined);
luadbg_setfield(L, 3, "lastlinedefined");
luadbg_pushstring(L, ar.what ? ar.what : "?");
luadbg_setfield(L, 3, "what");
break;
case 'l':
luadbg_pushinteger(L, ar.currentline);
luadbg_setfield(L, 3, "currentline");
break;
case 'n':
luadbg_pushstring(L, ar.name ? ar.name : "?");
luadbg_setfield(L, 3, "name");
if (ar.namewhat) {
luadbg_pushstring(L, ar.namewhat);
luadbg_setfield(L, 3, "namewhat");
}
break;
case 'f':
refvalue::create(L, refvalue::FRAME_FUNC { (uint16_t)frame });
luadbg_setfield(L, 3, "func");
break;
case 'u':
#if LUA_VERSION_NUM == 501
luadbg_pushinteger(L, nparams);
#else
luadbg_pushinteger(L, ar.nparams);
#endif
luadbg_setfield(L, 3, "nparams");
break;
#if LUA_VERSION_NUM >= 502
case 't':
luadbg_pushboolean(L, ar.istailcall ? 1 : 0);
luadbg_setfield(L, 3, "istailcall");
# if LUA_VERSION_NUM >= 505
luadbg_pushinteger(L, ar.extraargs);
luadbg_setfield(L, 3, "extraargs");
# endif
break;
#endif
#if LUA_VERSION_NUM >= 504
case 'r':
luadbg_pushinteger(L, ar.ftransfer);
luadbg_setfield(L, 3, "ftransfer");
luadbg_pushinteger(L, ar.ntransfer);
luadbg_setfield(L, 3, "ntransfer");
break;
#endif
}
}
return 1;
}
static int visitor_load(luadbg_State* L, lua_State* hL, protected_area& area) {
auto func = area.checkstring(L, 1);
if (luaL_loadbuffer(hL, func.data(), func.size(), "=")) {
luadbg_pushnil(L);
luadbg_pushstring(L, lua_tostring(hL, -1));
lua_pop(hL, 2);
return 2;
}
copy_to_dbg_ref(hL, L);
lua_pop(hL, 1);
return 1;
}
static int visitor_eval(luadbg_State* L, lua_State* hL, protected_area& area) {
int nargs = luadbg_gettop(L);
area.check_client_stack(nargs);
if (!copy_from_dbg(L, hL, area, 1, LUADBG_TFUNCTION)) {
return 0;
}
for (int i = 2; i <= nargs; ++i) {
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