project is now multi-threaded

dependencies/vmprofiler

@@ -1 +1 @@
-Subproject commit 8779ab1160b541cc8e0d4862aee66d075bfb2362
+Subproject commit eed247229fa832c2d2a1486e5467a129ce10debb

src/main.cpp

@@ -1,10 +1,13 @@
 #include <cli-parser.hpp>
 #include <fstream>
 #include <iostream>
+#include <thread>
 
 #include "unpacker.hpp"
 #include "vmemu_t.hpp"
 
+#define NUM_THREADS 20
+
 int __cdecl main(int argc, const char *argv[]) {
   argparse::argument_parser_t parser("VMEmu",
                                      "VMProtect 2 VM Handler Emulator");
@@ -92,8 +95,6 @@ int __cdecl main(int argc, const char *argv[]) {
                       case win::reloc_type_id::rel_based_dir64: {
                         auto reloc_at = reinterpret_cast<std::uintptr_t *>(
                             entry.offset + reloc_block->base_rva + module_base);
-                        std::printf("> handling reloc at = %x\n",
-                                    entry.offset + reloc_block->base_rva);
                         *reloc_at = module_base + ((*reloc_at) - image_base);
                         break;
                       }
@@ -144,7 +145,6 @@ int __cdecl main(int argc, const char *argv[]) {
     }
 
     std::printf("> number of blocks = %d\n", code_blocks.size());
-
     for (auto &code_block : code_blocks) {
       std::printf("> code block starts at = %p\n", code_block.vip_begin);
       std::printf("> number of virtual instructions = %d\n",
@@ -280,39 +280,56 @@ int __cdecl main(int argc, const char *argv[]) {
         std::pair<std::uintptr_t, std::vector<vm::instrs::code_block_t> > >
         virt_rtns;
 
+    std::vector<std::thread> threads;
     for (const auto &[vm_enter_offset, encrypted_rva, hndlr_tble] : entries) {
-      std::printf("> emulating vm enter at rva = 0x%x\n", vm_enter_offset);
-      vm::ctx_t vm_ctx(module_base, image_base, image_size, vm_enter_offset);
-
-      if (!vm_ctx.init()) {
-        std::printf(
-            "[!] failed to init vmctx... this can be for many reasons..."
-            " try validating your vm entry rva... make sure the binary is "
-            "unpacked and is"
-            "protected with VMProtect 2...\n");
-        return -1;
+      if (threads.size() == NUM_THREADS) {
+        std::for_each(threads.begin(), threads.end(),
+                      [&](std::thread &t) { t.join(); });
+        threads.clear();
       }
 
-      vm::emu_t emu(&vm_ctx);
+      threads.emplace_back(std::thread([vm_enter_offset = vm_enter_offset,
+                                        module_base = module_base,
+                                        image_base = image_base,
+                                        image_size = image_size,
+                                        &virt_rtns = virt_rtns]() {
+        std::printf("> emulating vm enter at rva = 0x%x\n", vm_enter_offset);
+        vm::ctx_t vm_ctx(module_base, image_base, image_size, vm_enter_offset);
+
+        if (!vm_ctx.init()) {
+          std::printf(
+              "[!] failed to init vmctx... this can be for many reasons..."
+              " try validating your vm entry rva... make sure the binary is "
+              "unpacked and is"
+              "protected with VMProtect 2...\n");
+          return;
+        }
 
-      if (!emu.init()) {
-        std::printf("[!] failed to init emulator...\n");
-        return -1;
-      }
+        vm::emu_t emu(&vm_ctx);
 
-      std::vector<vm::instrs::code_block_t> code_blocks;
+        if (!emu.init()) {
+          std::printf("[!] failed to init emulator...\n");
+          return;
+        }
 
-      if (!emu.get_trace(code_blocks)) {
-        std::printf(
-            "[!] something failed during tracing, review the console for more "
-            "information...\n");
-        continue;
-      }
+        std::vector<vm::instrs::code_block_t> code_blocks;
+
+        if (!emu.get_trace(code_blocks)) {
+          std::printf(
+              "[!] something failed during tracing, review the console for "
+              "more "
+              "information...\n");
+          return;
+        }
 
-      std::printf("> number of blocks = %d\n", code_blocks.size());
-      virt_rtns.push_back({vm_enter_offset, code_blocks});
+        std::printf("> number of blocks = %d\n", code_blocks.size());
+        virt_rtns.push_back({vm_enter_offset, code_blocks});
+      }));
     }
 
+    std::for_each(threads.begin(), threads.end(),
+                  [&](std::thread &t) { t.join(); });
+
     std::printf("> traced %d virtual routines...\n", virt_rtns.size());
     std::printf("> serializing results....\n");
 

src/vmemu_t.cpp

@@ -382,16 +382,15 @@ bool emu_t::code_exec_callback(uc_engine *uc, uint64_t address, uint32_t size,
   std::uint8_t vm_handler_table_idx = 0u;
   std::uintptr_t vm_handler_addr;
 
-  static std::shared_ptr<vm::ctx_t> _jmp_ctx;
-  static zydis_routine_t _jmp_stream;
-  static auto inst_cnt = 0ull;
-  static ZydisDecodedInstruction instr;
+  static thread_local std::shared_ptr<vm::ctx_t> _jmp_ctx;
+  static thread_local zydis_routine_t _jmp_stream;
+  static thread_local auto inst_cnt = 0ull;
+  static thread_local ZydisDecodedInstruction instr;
 
   if (!ZYAN_SUCCESS(ZydisDecoderDecodeBuffer(vm::util::g_decoder.get(),
                                              reinterpret_cast<void *>(address),
                                              PAGE_4KB, &instr))) {
     std::printf("> failed to decode instruction at = 0x%p\n", address);
-
     if ((err = uc_emu_stop(uc))) {
       std::printf("> failed to stop emulation, exiting... reason = %d\n", err);
       exit(0);
@@ -408,6 +407,7 @@ bool emu_t::code_exec_callback(uc_engine *uc, uint64_t address, uint32_t size,
   // if there are over 4k instructions executed before a JMP is found then we
   // are gunna stop emulation this is a sanity check to prevent inf loops...
   if (++inst_cnt > 0x1000) {
+    std::printf("> inf loop detected... stopping emulation...\n");
     obj->cc_block = nullptr, inst_cnt = 0ull;
     uc_emu_stop(uc);
     return false;