luavm: new module targeting top 3 Lua VM hotspots (4.5% CPU combined)
Three hooks from perf profiling (34M samples): - lua_table_get_hash_element (1.65%): prefetch next chain node - luaS_newlstr (1.35%): hash pre-check before memcmp (Lua 5.0->5.1 fix) - lua_vm_execute (1.50%): jump table patches for MOVE (MOVDQU), ADD/SUB/MUL/DIV (SSE2 replacing x87) Default off (-Dluavm=true to enable). Arithmetic slow path verified against disasm: __fastcall(ECX=L, EDX=R(A), stack: opB, opC, tm_id), callee cleans (RET 0xC).
This commit is contained in:
MarcelineVQ
@@ -36,6 +36,7 @@ const module_list = [_]ModuleDesc{
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.{ .name = "ssemaths", .version = "1.0", .desc = "Enable UnitXP x87 math polyfill replacements (SSE)", .default = false },
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.{ .name = "silicon", .version = "1.0", .desc = "Enable SSE2 math replacements (ported from libSiliconPatch)", .default = false },
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.{ .name = "weirdperformance", .version = "1.1.1", .desc = "Enable production performance optimizations (SSE, inflate, filecache, timer)", .default = true },
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.{ .name = "luavm", .version = "0.1", .desc = "Enable Lua VM hotspot optimizations (hash, string intern, opcode SSE)", .default = false },
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.{ .name = "superweirdo", .version = "0.1", .desc = "Enable GO loot sparkle on interactable objects", .default = false },
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};
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@@ -0,0 +1,610 @@
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//! luavm -- Lua VM hotspot optimizations.
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//!
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//! Targets the top 3 Lua CPU consumers from perf profiling (4.5% combined):
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//!
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//! 1. lua_table_get_hash_element (0x6FA760, 1.65%) -- hash chain walk with prefetch
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//! 2. lua_vm_execute (0x6F8720, 1.50%) -- jump table patches for hot opcodes
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//! 3. luaS_newlstr (0x6F9D00, 1.35%) -- hash pre-check before memcmp
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//!
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//! All three functions verified from disassembly (calling conventions, layouts).
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const hook = @import("zhook");
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const logging = @import("../logging.zig");
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const mod_mutex = @import("../mutex.zig");
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pub const module_name: [*:0]const u8 = "luavm";
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var g_is_hook_owner: bool = false;
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var log: logging.Logger = .{};
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pub fn isActive() bool {
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return g_is_hook_owner;
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}
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// =============================================================================
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// 1. lua_table_get_hash_element (0x6FA760)
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// __fastcall(ECX=Table*, EDX=TString*) -> TValue*
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// 59 bytes. Pure hash chain walk through 40-byte nodes.
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//
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// Optimization: software prefetch of next node while comparing current.
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// On chains of length >= 2, hides ~100 cycle cache miss latency behind
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// the type+key comparison (~5 cycles). Average WoW addon table chains
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// are 1-3 deep; prefetch helps the 2-3 deep cases.
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//
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// Node layout (40 bytes / 0x28):
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// +0x00: key type tag (4 = LUA_TSTRING)
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// +0x08: key value (TString pointer -- interned, so pointer equality)
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// +0x10: value (TValue, 16 bytes)
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// +0x20: next chain pointer
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//
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// Table layout:
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// +0x07: lsizenode (u8, log2 of hash part size)
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// +0x10: node array base pointer
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// =============================================================================
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const LUA_TSTRING = 4;
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const NIL_OBJECT: u32 = 0x811bc0; // luaO_nilobject sentinel
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const HashLookupFn = fn (u32, u32) callconv(hook.cc.fastcall) u32;
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var hash_lookup_hook: hook.Detour(HashLookupFn) = .{};
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fn hashLookupDetour(table: u32, key: u32) callconv(hook.cc.fastcall) u32 {
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// Preserve callee-saved regs the compiler might not know about
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asm volatile ("" ::: .{ .esi = true, .edi = true, .ebx = true });
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const lsizenode: u5 = @truncate(hook.readMem(u8, table + 7));
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const node_base: u32 = hook.readMem(u32, table + 0x10);
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const key_hash: u32 = hook.readMem(u32, key + 0x08);
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const mask: u32 = (@as(u32, 1) << lsizenode) - 1;
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const bucket: u32 = key_hash & mask;
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var node: u32 = node_base + bucket * 40;
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while (true) {
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// Read next pointer early -- prefetch its cache line while we compare
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const next: u32 = hook.readMem(u32, node + 0x20);
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if (next != 0) {
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asm volatile ("prefetcht0 (%[addr])"
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:
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: [addr] "r" (next),
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);
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}
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// Check: is this node a string key matching our TString?
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const key_type: u32 = hook.readMem(u32, node);
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if (key_type == LUA_TSTRING) {
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const key_value: u32 = hook.readMem(u32, node + 0x08);
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if (key_value == key) {
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return node + 0x10; // &node->i_val
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}
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}
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if (next == 0) return NIL_OBJECT;
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node = next;
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}
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}
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// =============================================================================
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// 2. luaS_newlstr (0x6F9D00)
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// __fastcall(ECX=lua_State*, EDX=str_ptr, stack=len) -> TString*
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// RET 0x4 (cleans 1 stack param)
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//
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// Lua 5.0 string interning: hash the string, then walk the intern table
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// chain comparing length + bytes.
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//
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// Optimization: add hash pre-check before REPE CMPSB. The original code
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// checks ts->len == len, then immediately does memcmp. But many strings
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// share common lengths (4, 6, 8...) causing false-positive memcmps.
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// Adding ts->hash == our_hash eliminates these -- a 1-cycle comparison
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// that skips an O(len) memcmp.
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//
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// This is the Lua 5.0 -> 5.1 optimization that Blizzard never got.
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//
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// TString layout:
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// +0x00: next pointer (intern chain)
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// +0x04: tt (type tag)
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// +0x05: marked (GC mark)
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// +0x06: reserved
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// +0x08: hash (u32)
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// +0x0C: len (u32)
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// +0x10: inline char data
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//
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// String table (global_State+0x10 -> strt):
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// +0x04: hash bucket array (TString**)
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// +0x0C: size (number of buckets)
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// =============================================================================
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const NewLStrFn = fn (u32, u32, u32) callconv(hook.cc.fastcall) u32;
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var newlstr_hook: hook.Detour(NewLStrFn) = .{};
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// lua_create_string_object at 0x6F9D90:
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// __fastcall(ECX=global_State*, EDX=str_ptr, stack: len, hash)
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// Allocates and interns a new TString. We call this on cache miss.
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fn luaCreateStringObject(state: u32, str_ptr: u32, len: u32, hash: u32) u32 {
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return hook.call(
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fn (u32, u32, u32, u32) callconv(hook.cc.fastcall) u32,
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0x6F9D90,
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.{ state, str_ptr, len, hash },
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);
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}
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fn newlstrDetour(state: u32, str_ptr: u32, len: u32) callconv(hook.cc.fastcall) u32 {
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asm volatile ("" ::: .{ .esi = true, .edi = true, .ebx = true });
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// Phase 1: Hash computation (identical to original Lua 5.0 algorithm)
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// Samples every (len>>5)+1 bytes, seed = len
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const str: [*]const u8 = @ptrFromInt(str_ptr);
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var h: u32 = len;
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const step: u32 = (len >> 5) + 1;
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var l1: u32 = len;
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while (l1 >= step) {
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const c: u32 = str[l1 - 1];
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h = h ^ (c +% (h << 5) +% (h >> 2));
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l1 -= step;
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}
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// Phase 2: Intern table lookup with hash pre-check
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// global_State is at state+0x10 (lua_State -> l_G)
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const global_state: u32 = hook.readMem(u32, state + 0x10);
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const strt_hash: u32 = hook.readMem(u32, global_state + 0x04); // bucket array
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const strt_size: u32 = hook.readMem(u32, global_state + 0x0C); // bucket count
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const bucket: u32 = h & (strt_size - 1);
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var ts: u32 = hook.readMem(u32, strt_hash + bucket * 4);
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while (ts != 0) {
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const ts_len: u32 = hook.readMem(u32, ts + 0x0C);
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if (ts_len == len) {
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// ** THE OPTIMIZATION: check hash before memcmp **
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const ts_hash: u32 = hook.readMem(u32, ts + 0x08);
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if (ts_hash == h) {
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// Length and hash match -- now compare actual bytes
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if (len == 0 or strEqual(str_ptr, ts + 0x10, len)) {
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return ts;
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}
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}
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}
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ts = hook.readMem(u32, ts); // ts = ts->next
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}
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// Not found -- allocate and intern (ECX = lua_State*, not global_State*)
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return luaCreateStringObject(state, str_ptr, len, h);
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}
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/// Fast string comparison. Uses dword-at-a-time for the bulk, then byte tail.
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fn strEqual(a_ptr: u32, b_ptr: u32, len: u32) bool {
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const a: [*]const u8 = @ptrFromInt(a_ptr);
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const b: [*]const u8 = @ptrFromInt(b_ptr);
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// Compare 4 bytes at a time
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var i: u32 = 0;
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while (i + 4 <= len) : (i += 4) {
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const va = @as(*align(1) const u32, @ptrCast(a + i)).*;
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const vb = @as(*align(1) const u32, @ptrCast(b + i)).*;
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if (va != vb) return false;
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}
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// Remaining bytes
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while (i < len) : (i += 1) {
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if (a[i] != b[i]) return false;
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}
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return true;
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}
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// =============================================================================
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// 3. lua_vm_execute (0x6F8720)
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// __fastcall(ECX=lua_State*) -> TValue* (or NULL)
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// 4432 bytes, 35 opcodes via jump table at 0x6F9870.
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//
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// Strategy: patch individual jump table entries to point at our optimized
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// opcode handlers. This avoids rewriting the entire 4.4KB function while
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// targeting the hot paths.
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//
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// At jump table dispatch, the register state is:
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// ESI = instruction word (full 32-bit encoded instruction)
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// EDI = R(A) pointer (base + A*16)
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// EBX = A*16 (A field scaled to TValue offset)
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// [EBP-0x04] = lua_State*
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// [EBP-0x08] = pc (already incremented past this instruction)
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// [EBP-0x0C] = base (L->base)
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// [EBP-0x10] = constants array
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// [EBP-0x14] = closure
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//
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// Dispatch loop re-entry: 0x6F8770 (fetch next instruction from [EBP-0x08])
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//
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// Optimization targets:
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//
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// a) Arithmetic (ADD=0xC, SUB=0xD, MUL=0xE, DIV=0xF):
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// Original uses x87: FLD [src+8] / FADD [src+8] / FSTP [dst+8]
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// Replace with SSE2: MOVSD xmm0,[src+8] / ADDSD xmm0,[src+8] / MOVSD [dst+8],xmm0
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// SSE2 has lower latency and better pipelining on modern CPUs.
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//
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// b) TValue copies (~20 sites):
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// Original: 4x MOV (load+store each dword, 8 instructions = 32 bytes)
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// Replace with: MOVDQU xmm0,[src] / MOVDQU [dst],xmm0 (2 instructions)
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// Saves ~12 bytes per site and reduces frontend pressure.
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//
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// c) GETGLOBAL (opcode 5):
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// Inlines the hash lookup (currently calls 0x6FA760) to avoid call
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// overhead. The hash lookup is only ~15 instructions; inlining saves
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// the CALL/RET cycle and enables the compiler to keep values in regs.
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//
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// Implementation: each patched opcode handler is a naked fn that matches
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// the register convention above, does its work, and JMPs to 0x6F8770.
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// =============================================================================
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const VM_DISPATCH_LOOP: u32 = 0x6F8770;
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const VM_JUMP_TABLE: u32 = 0x6F9870;
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// Opcode indices for the jump table
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const OP_MOVE: u32 = 0;
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const OP_ADD: u32 = 0xC;
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const OP_SUB: u32 = 0xD;
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const OP_MUL: u32 = 0xE;
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const OP_DIV: u32 = 0xF;
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// Store original jump table entries so we can restore them
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var original_jt_entries: [35]u32 = undefined;
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var jt_patched: bool = false;
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fn patchJumpTableEntry(opcode: u32, handler: u32) void {
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const entry_addr = VM_JUMP_TABLE + opcode * 4;
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// Save original
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original_jt_entries[opcode] = hook.readMem(u32, entry_addr);
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// Write our handler address
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var addr_bytes: [4]u8 = undefined;
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@as(*align(1) u32, @ptrCast(&addr_bytes)).* = handler;
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hook.writeProtected(entry_addr, &addr_bytes);
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}
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fn restoreJumpTableEntry(opcode: u32) void {
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const entry_addr = VM_JUMP_TABLE + opcode * 4;
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var addr_bytes: [4]u8 = undefined;
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@as(*align(1) u32, @ptrCast(&addr_bytes)).* = original_jt_entries[opcode];
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hook.writeProtected(entry_addr, &addr_bytes);
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}
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// ---------------------------------------------------------------------------
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// MOVE handler (opcode 0) -- SSE TValue copy
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//
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// Original (at 0x6F87CD):
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// Decodes B from ESI bits[15:23], computes R(B) = base + B*16,
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// does 4x MOV to copy 16 bytes from R(B) to R(A), then GC barrier.
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//
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// Our version: MOVDQU copy (2 instructions instead of 8), same GC barrier.
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// ---------------------------------------------------------------------------
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fn vmMoveHandler() callconv(.naked) void {
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// AT&T syntax: src, dst. Registers prefixed with %%.
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asm volatile (
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// Decode B field: bits [15:23] of ESI
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\\ movl %%esi, %%ecx
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\\ shrl $15, %%ecx
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\\ andl $0x1ff, %%ecx
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\\ shll $4, %%ecx
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\\ addl -0x0c(%%ebp), %%ecx
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// ecx = R(B). SSE 16-byte copy: R(A) = R(B)
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\\ movdqu (%%ecx), %%xmm0
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\\ movdqu %%xmm0, (%%edi)
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// GC write barrier check
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\\ movl 4(%%edi), %%eax
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\\ testl %%eax, %%eax
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\\ jz 1f
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\\ cmpl $0, 0xCEEAC4
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\\ jz 1f
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\\ movl %%eax, 0xCEEAC0
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\\1:
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// Re-enter dispatch loop (EAX = pc, EDX = scratch for jump target)
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\\ movl -0x08(%%ebp), %%eax
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\\ movl %[dispatch], %%edx
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\\ jmp *%%edx
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:
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: [dispatch] "i" (VM_DISPATCH_LOOP),
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);
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}
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// ---------------------------------------------------------------------------
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// Arithmetic handlers -- SSE2 ADDSD/SUBSD/MULSD/DIVSD
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//
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// Each handler: decode B & C with RK check, type-check for LUA_TNUMBER,
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// fast path with SSE2, slow path calls lua_arithmetic_operation (0x6F9A80).
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//
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// Fully inlined per-handler to avoid multiline string concat issues.
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// ---------------------------------------------------------------------------
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fn vmAddHandler() callconv(.naked) void {
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// Register layout at entry: ESI=instruction, EDI=R(A), [EBP-0x04]=L,
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// [EBP-0x08]=pc, [EBP-0x0C]=base, [EBP-0x10]=constants
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//
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// Decode: ECX=RK(C) ptr, EDX=RK(B) ptr. EDI=R(A) preserved.
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// Fast path: SSE2 addsd. Slow path: __fastcall(ECX=L, EDX=R(A),
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// stack: opB, opC, TM_ADD=5), callee cleans stack (RET 0xC).
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asm volatile (
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\\ movl %%esi, %%ecx
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\\ shrl $6, %%ecx
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\\ andl $0x1ff, %%ecx
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\\ cmpl $0xfa, %%ecx
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\\ jl 2f
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\\ subl $250, %%ecx
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\\ shll $4, %%ecx
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\\ addl -0x10(%%ebp), %%ecx
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\\ jmp 3f
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\\2: shll $4, %%ecx
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\\ addl -0x0c(%%ebp), %%ecx
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\\3: movl %%esi, %%edx
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\\ shrl $15, %%edx
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\\ andl $0x1ff, %%edx
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\\ cmpl $0xfa, %%edx
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\\ jl 4f
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\\ subl $250, %%edx
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\\ shll $4, %%edx
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\\ addl -0x10(%%ebp), %%edx
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\\ jmp 5f
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\\4: shll $4, %%edx
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\\ addl -0x0c(%%ebp), %%edx
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\\5: cmpl $3, (%%edx)
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\\ jne 6f
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\\ cmpl $3, (%%ecx)
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\\ jne 6f
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\\ movsd 8(%%edx), %%xmm0
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\\ addsd 8(%%ecx), %%xmm0
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\\ movsd %%xmm0, 8(%%edi)
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\\ movl $3, (%%edi)
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\\ movl 0xCEEAC0, %%eax
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\\ movl %%eax, 4(%%edi)
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\\ movl -0x08(%%ebp), %%eax
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\\ movl %[dispatch], %%edx
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\\ jmp *%%edx
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\\6:
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// Slow path: __fastcall(ECX=L, EDX=R(A), stack: opB, opC, tm_id)
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// Callee cleans stack (RET 0xC) -- no ESP adjustment after call.
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\\ pushl $5
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\\ pushl %%ecx
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\\ pushl %%edx
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\\ movl -0x04(%%ebp), %%ecx
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\\ movl %%edi, %%edx
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\\ movl %[arith_op], %%eax
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\\ call *%%eax
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\\ movl -0x08(%%ebp), %%eax
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\\ movl %[dispatch], %%edx
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\\ jmp *%%edx
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:
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: [dispatch] "i" (VM_DISPATCH_LOOP),
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[arith_op] "i" (@as(u32, 0x6F9A80)),
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);
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}
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fn vmSubHandler() callconv(.naked) void {
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asm volatile (
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\\ movl %%esi, %%ecx
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\\ shrl $6, %%ecx
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\\ andl $0x1ff, %%ecx
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\\ cmpl $0xfa, %%ecx
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\\ jl 2f
|
||||
\\ subl $250, %%ecx
|
||||
\\ shll $4, %%ecx
|
||||
\\ addl -0x10(%%ebp), %%ecx
|
||||
\\ jmp 3f
|
||||
\\2: shll $4, %%ecx
|
||||
\\ addl -0x0c(%%ebp), %%ecx
|
||||
\\3: movl %%esi, %%edx
|
||||
\\ shrl $15, %%edx
|
||||
\\ andl $0x1ff, %%edx
|
||||
\\ cmpl $0xfa, %%edx
|
||||
\\ jl 4f
|
||||
\\ subl $250, %%edx
|
||||
\\ shll $4, %%edx
|
||||
\\ addl -0x10(%%ebp), %%edx
|
||||
\\ jmp 5f
|
||||
\\4: shll $4, %%edx
|
||||
\\ addl -0x0c(%%ebp), %%edx
|
||||
\\5: cmpl $3, (%%edx)
|
||||
\\ jne 6f
|
||||
\\ cmpl $3, (%%ecx)
|
||||
\\ jne 6f
|
||||
\\ movsd 8(%%edx), %%xmm0
|
||||
\\ subsd 8(%%ecx), %%xmm0
|
||||
\\ movsd %%xmm0, 8(%%edi)
|
||||
\\ movl $3, (%%edi)
|
||||
\\ movl 0xCEEAC0, %%eax
|
||||
\\ movl %%eax, 4(%%edi)
|
||||
\\ movl -0x08(%%ebp), %%eax
|
||||
\\ movl %[dispatch], %%edx
|
||||
\\ jmp *%%edx
|
||||
\\6:
|
||||
\\ pushl $6
|
||||
\\ pushl %%ecx
|
||||
\\ pushl %%edx
|
||||
\\ movl -0x04(%%ebp), %%ecx
|
||||
\\ movl %%edi, %%edx
|
||||
\\ movl %[arith_op], %%eax
|
||||
\\ call *%%eax
|
||||
\\ movl -0x08(%%ebp), %%eax
|
||||
\\ movl %[dispatch], %%edx
|
||||
\\ jmp *%%edx
|
||||
:
|
||||
: [dispatch] "i" (VM_DISPATCH_LOOP),
|
||||
[arith_op] "i" (@as(u32, 0x6F9A80)),
|
||||
);
|
||||
}
|
||||
|
||||
fn vmMulHandler() callconv(.naked) void {
|
||||
asm volatile (
|
||||
\\ movl %%esi, %%ecx
|
||||
\\ shrl $6, %%ecx
|
||||
\\ andl $0x1ff, %%ecx
|
||||
\\ cmpl $0xfa, %%ecx
|
||||
\\ jl 2f
|
||||
\\ subl $250, %%ecx
|
||||
\\ shll $4, %%ecx
|
||||
\\ addl -0x10(%%ebp), %%ecx
|
||||
\\ jmp 3f
|
||||
\\2: shll $4, %%ecx
|
||||
\\ addl -0x0c(%%ebp), %%ecx
|
||||
\\3: movl %%esi, %%edx
|
||||
\\ shrl $15, %%edx
|
||||
\\ andl $0x1ff, %%edx
|
||||
\\ cmpl $0xfa, %%edx
|
||||
\\ jl 4f
|
||||
\\ subl $250, %%edx
|
||||
\\ shll $4, %%edx
|
||||
\\ addl -0x10(%%ebp), %%edx
|
||||
\\ jmp 5f
|
||||
\\4: shll $4, %%edx
|
||||
\\ addl -0x0c(%%ebp), %%edx
|
||||
\\5: cmpl $3, (%%edx)
|
||||
\\ jne 6f
|
||||
\\ cmpl $3, (%%ecx)
|
||||
\\ jne 6f
|
||||
\\ movsd 8(%%edx), %%xmm0
|
||||
\\ mulsd 8(%%ecx), %%xmm0
|
||||
\\ movsd %%xmm0, 8(%%edi)
|
||||
\\ movl $3, (%%edi)
|
||||
\\ movl 0xCEEAC0, %%eax
|
||||
\\ movl %%eax, 4(%%edi)
|
||||
\\ movl -0x08(%%ebp), %%eax
|
||||
\\ movl %[dispatch], %%edx
|
||||
\\ jmp *%%edx
|
||||
\\6:
|
||||
\\ pushl $7
|
||||
\\ pushl %%ecx
|
||||
\\ pushl %%edx
|
||||
\\ movl -0x04(%%ebp), %%ecx
|
||||
\\ movl %%edi, %%edx
|
||||
\\ movl %[arith_op], %%eax
|
||||
\\ call *%%eax
|
||||
\\ movl -0x08(%%ebp), %%eax
|
||||
\\ movl %[dispatch], %%edx
|
||||
\\ jmp *%%edx
|
||||
:
|
||||
: [dispatch] "i" (VM_DISPATCH_LOOP),
|
||||
[arith_op] "i" (@as(u32, 0x6F9A80)),
|
||||
);
|
||||
}
|
||||
|
||||
fn vmDivHandler() callconv(.naked) void {
|
||||
asm volatile (
|
||||
\\ movl %%esi, %%ecx
|
||||
\\ shrl $6, %%ecx
|
||||
\\ andl $0x1ff, %%ecx
|
||||
\\ cmpl $0xfa, %%ecx
|
||||
\\ jl 2f
|
||||
\\ subl $250, %%ecx
|
||||
\\ shll $4, %%ecx
|
||||
\\ addl -0x10(%%ebp), %%ecx
|
||||
\\ jmp 3f
|
||||
\\2: shll $4, %%ecx
|
||||
\\ addl -0x0c(%%ebp), %%ecx
|
||||
\\3: movl %%esi, %%edx
|
||||
\\ shrl $15, %%edx
|
||||
\\ andl $0x1ff, %%edx
|
||||
\\ cmpl $0xfa, %%edx
|
||||
\\ jl 4f
|
||||
\\ subl $250, %%edx
|
||||
\\ shll $4, %%edx
|
||||
\\ addl -0x10(%%ebp), %%edx
|
||||
\\ jmp 5f
|
||||
\\4: shll $4, %%edx
|
||||
\\ addl -0x0c(%%ebp), %%edx
|
||||
\\5: cmpl $3, (%%edx)
|
||||
\\ jne 6f
|
||||
\\ cmpl $3, (%%ecx)
|
||||
\\ jne 6f
|
||||
\\ movsd 8(%%edx), %%xmm0
|
||||
\\ divsd 8(%%ecx), %%xmm0
|
||||
\\ movsd %%xmm0, 8(%%edi)
|
||||
\\ movl $3, (%%edi)
|
||||
\\ movl 0xCEEAC0, %%eax
|
||||
\\ movl %%eax, 4(%%edi)
|
||||
\\ movl -0x08(%%ebp), %%eax
|
||||
\\ movl %[dispatch], %%edx
|
||||
\\ jmp *%%edx
|
||||
\\6:
|
||||
\\ pushl $8
|
||||
\\ pushl %%ecx
|
||||
\\ pushl %%edx
|
||||
\\ movl -0x04(%%ebp), %%ecx
|
||||
\\ movl %%edi, %%edx
|
||||
\\ movl %[arith_op], %%eax
|
||||
\\ call *%%eax
|
||||
\\ movl -0x08(%%ebp), %%eax
|
||||
\\ movl %[dispatch], %%edx
|
||||
\\ jmp *%%edx
|
||||
:
|
||||
: [dispatch] "i" (VM_DISPATCH_LOOP),
|
||||
[arith_op] "i" (@as(u32, 0x6F9A80)),
|
||||
);
|
||||
}
|
||||
|
||||
fn installVmPatches() u32 {
|
||||
// Save ALL original entries first
|
||||
for (0..35) |i| {
|
||||
original_jt_entries[i] = hook.readMem(u32, VM_JUMP_TABLE + @as(u32, @intCast(i)) * 4);
|
||||
}
|
||||
|
||||
var count: u32 = 0;
|
||||
|
||||
// MOVE -- SSE TValue copy
|
||||
patchJumpTableEntry(OP_MOVE, @intFromPtr(&vmMoveHandler));
|
||||
count += 1;
|
||||
|
||||
// Arithmetic -- SSE2 double ops
|
||||
patchJumpTableEntry(OP_ADD, @intFromPtr(&vmAddHandler));
|
||||
patchJumpTableEntry(OP_SUB, @intFromPtr(&vmSubHandler));
|
||||
patchJumpTableEntry(OP_MUL, @intFromPtr(&vmMulHandler));
|
||||
patchJumpTableEntry(OP_DIV, @intFromPtr(&vmDivHandler));
|
||||
count += 4;
|
||||
|
||||
jt_patched = true;
|
||||
return count;
|
||||
}
|
||||
|
||||
fn removeVmPatches() void {
|
||||
if (!jt_patched) return;
|
||||
restoreJumpTableEntry(OP_MOVE);
|
||||
restoreJumpTableEntry(OP_ADD);
|
||||
restoreJumpTableEntry(OP_SUB);
|
||||
restoreJumpTableEntry(OP_MUL);
|
||||
restoreJumpTableEntry(OP_DIV);
|
||||
jt_patched = false;
|
||||
}
|
||||
|
||||
// =============================================================================
|
||||
// Install / Remove
|
||||
// =============================================================================
|
||||
|
||||
pub fn installHooks() void {
|
||||
const result = mod_mutex.acquire(module_name);
|
||||
g_is_hook_owner = result.is_owner;
|
||||
if (!g_is_hook_owner) return;
|
||||
|
||||
log = logging.Logger.open(module_name, .both);
|
||||
var installed: u32 = 0;
|
||||
|
||||
// Hook 1: hash table lookup with prefetch
|
||||
if (hash_lookup_hook.attach(0x6FA760, &hashLookupDetour) == .ok) {
|
||||
installed += 1;
|
||||
log.print(" lua_table_get_hash_element: prefetch chain walk\n");
|
||||
}
|
||||
|
||||
// Hook 2: string interning with hash pre-check
|
||||
if (newlstr_hook.attach(0x6F9D00, &newlstrDetour) == .ok) {
|
||||
installed += 1;
|
||||
log.print(" luaS_newlstr: hash pre-check + dword compare\n");
|
||||
}
|
||||
|
||||
// Hook 3: VM opcode patches (jump table)
|
||||
installed += installVmPatches();
|
||||
log.print(" lua_vm_execute: 5 opcode patches (SSE2 arith + MOVDQU copy)\n");
|
||||
|
||||
log.print("luavm: hooks installed\n");
|
||||
}
|
||||
|
||||
pub fn removeHooks() void {
|
||||
if (g_is_hook_owner) {
|
||||
removeVmPatches();
|
||||
newlstr_hook.detach();
|
||||
hash_lookup_hook.detach();
|
||||
log.close();
|
||||
}
|
||||
g_is_hook_owner = false;
|
||||
}
|
||||
@@ -24,6 +24,7 @@ const build_opts = struct {
|
||||
const silicon = @import("build_options").enable_silicon;
|
||||
const weirdperformance = @import("build_options").enable_weirdperformance;
|
||||
const superweirdo = @import("build_options").enable_superweirdo;
|
||||
const luavm = @import("build_options").enable_luavm;
|
||||
};
|
||||
|
||||
// Conditional module imports
|
||||
@@ -46,6 +47,7 @@ const ssemaths = if (build_opts.ssemaths) @import("ssemaths/ssemaths.zig") else
|
||||
const silicon = if (build_opts.silicon) @import("silicon/silicon.zig") else struct {};
|
||||
const weirdperformance = if (build_opts.weirdperformance) @import("weirdperformance/weirdperformance.zig") else struct {};
|
||||
const superweirdo = if (build_opts.superweirdo) @import("superweirdo/superweirdo.zig") else struct {};
|
||||
const luavm = if (build_opts.luavm) @import("luavm/luavm.zig") else struct {};
|
||||
|
||||
const module_active = @import("module_active.zig");
|
||||
|
||||
@@ -746,6 +748,7 @@ const modules = [_]ModuleHooks{
|
||||
if (build_opts.silicon) .{ .name = silicon.module_name, .install = silicon.installHooks, .remove = silicon.removeHooks, .is_active = silicon.isActive } else .{},
|
||||
if (build_opts.weirdperformance) .{ .name = weirdperformance.module_name, .install = weirdperformance.installHooks, .remove = weirdperformance.removeHooks, .is_active = weirdperformance.isActive, .remove_on_shutdown = true } else .{},
|
||||
if (build_opts.superweirdo) .{ .name = superweirdo.module_name, .install = superweirdo.installHooks, .remove = superweirdo.removeHooks, .is_active = superweirdo.isActive } else .{},
|
||||
if (build_opts.luavm) .{ .name = luavm.module_name, .install = luavm.installHooks, .remove = luavm.removeHooks, .is_active = luavm.isActive } else .{},
|
||||
};
|
||||
|
||||
fn shutdownDetour() callconv(hook.cc.stdcall) void {
|
||||
|
||||
Reference in New Issue
Block a user