DebugBreak()想断就断

本文介绍了一种在OCX控件中调试回调JavaScript函数的有效方法:使用DebugBreak()函数来触发调试器,无需在Visual Studio环境中即可实现IE中的断点调试。

最近做OCX控件,和IE关系特密切,需要在OCX里回调页面上的js函数。想调试回调js函数这块儿,不用IE调试吧,取不到页面Document、js对象,用IE调吧,断点又总是失效。

         郁闷了好久,终于在优快云上查到了一位大牛以前的回贴,可以在想要设置断点的地方,加入DebugBreak()函数,程序执行到这里的时候,自动提示加载调试器进行调试。

         呵呵,这一招真的挺好用,生成并注册OCX后,不用在VS里调试,直接运行IE加载控件,只要一执行到DebugBreak,就弹出提示框询问是否进行调试,真爽!


http://my.oschina.net/SmileWolf/blog/17483

#include <ntifs.h> #include <ntddk.h> #include <intrin.h> #include "ptehook.h" #define CR0_WP (1 << 16) typedef INT(*LDE_DISASM)(PVOID address, INT bits); typedef unsigned long DWORD; typedef unsigned __int64 ULONG64; // 使用WDK标准类型 typedef unsigned char BYTE; typedef LONG NTSTATUS; // 修正后的跳转指令结构 #pragma pack(push, 1) typedef struct _JMP_ABS { BYTE opcode[6]; // FF 25 00 00 00 00 ULONG64 address; // 8字节绝对地址 } JMP_ABS, * PJMP_ABS; #pragma pack(pop) LDE_DISASM lde_disasm; // 初始化引擎 VOID lde_init() { lde_disasm = (LDE_DISASM)ExAllocatePool(NonPagedPool, 12800); memcpy(lde_disasm, szShellCode, 12800); } // 得到完整指令长度,避免截 ULONG GetFullPatchSize(PUCHAR Address) { ULONG LenCount = 0, Len = 0; // 至少需要14字节 while (LenCount <= 14) { Len = lde_disasm(Address, 64); Address = Address + Len; LenCount = LenCount + Len; } return LenCount; } #define PROCESS_NAME_LENGTH 16 #define DRIVER_TAG 'HKOB' EXTERN_C char* PsGetProcessImageFileName(PEPROCESS process); char target_process_name[] = "oxygen.exe"; typedef NTSTATUS(*fn_ObReferenceObjectByHandleWithTag)( HANDLE Handle, ACCESS_MASK DesiredAccess, POBJECT_TYPE ObjectType, KPROCESSOR_MODE AccessMode, ULONG Tag, PVOID* Object, POBJECT_HANDLE_INFORMATION HandleInformation ); fn_ObReferenceObjectByHandleWithTag g_OriginalObReferenceObjectByHandleWithTag = NULL; // PTE Hook Framework #define MAX_G_BIT_RECORDS 128 #define MAX_HOOK_COUNT 64 #define PAGE_ALIGN(va) ((PVOID)((ULONG_PTR)(va) & ~0xFFF)) #define PDPTE_PS_BIT (1 << 7) #define PDE_PS_BIT (1 << 7) #define PTE_NX_BIT (1ULL << 63) #define CACHE_WB (6ULL << 3) // 页表结构定义 typedef struct _PAGE_TABLE { UINT64 LineAddress; union { struct { UINT64 present : 1; UINT64 write : 1; UINT64 user : 1; UINT64 write_through : 1; UINT64 cache_disable : 1; UINT64 accessed : 1; UINT64 dirty : 1; UINT64 pat : 1; UINT64 global : 1; UINT64 ignored_1 : 3; UINT64 page_frame_number : 36; UINT64 reserved_1 : 4; UINT64 ignored_2 : 7; UINT64 protection_key : 4; UINT64 execute_disable : 1; } flags; UINT64 value; }*PteAddress; union { struct { UINT64 present : 1; UINT64 write : 1; UINT64 user : 1; UINT64 write_through : 1; UINT64 cache_disable : 1; UINT64 accessed : 1; UINT64 dirty : 1; UINT64 large_page : 1; UINT64 global : 1; UINT64 ignored_2 : 3; UINT64 page_frame_number : 36; UINT64 reserved_1 : 4; UINT64 ignored_3 : 7; UINT64 protection_key : 4; UINT64 execute_disable : 1; } flags; UINT64 value; }*PdeAddress; union { struct { UINT64 present : 1; UINT64 write : 1; UINT64 user : 1; UINT64 write_through : 1; UINT64 cache_disable : 1; UINT64 accessed : 1; UINT64 ignored_1 : 1; UINT64 page_size : 1; UINT64 ignored_2 : 4; UINT64 page_frame_number : 36; UINT64 reserved_1 : 4; UINT64 ignored_3 : 7; UINT64 protection_key : 4; UINT64 execute_disable : 1; } flags; UINT64 value; }*PdpteAddress; UINT64* Pml4Address; BOOLEAN IsLargePage; BOOLEAN Is1GBPage; UINT64 OriginalPte; UINT64 OriginalPde; UINT64 OriginalPdpte; UINT64 OriginalPml4e; HANDLE ProcessId; } PAGE_TABLE, * PPAGE_TABLE; // G位信息记录结构体 typedef struct _G_BIT_INFO { void* AlignAddress; union { struct { UINT64 present : 1; UINT64 write : 1; UINT64 user : 1; UINT64 write_through : 1; UINT64 cache_disable : 1; UINT64 accessed : 1; UINT64 dirty : 1; UINT64 large_page : 1; UINT64 global : 1; UINT64 ignored_2 : 3; UINT64 page_frame_number : 36; UINT64 reserved_1 : 4; UINT64 ignored_3 : 7; UINT64 protection_key : 4; UINT64 execute_disable : 1; } flags; UINT64 value; }*PdeAddress; union { struct { UINT64 present : 1; UINT64 write : 1; UINT64 user : 1; UINT64 write_through : 1; UINT64 cache_disable : 1; UINT64 accessed : 1; UINT64 dirty : 1; UINT64 pat : 1; UINT64 global : 1; UINT64 ignored_1 : 3; UINT64 page_frame_number : 36; UINT64 reserved_1 : 4; UINT64 ignored_2 : 7; UINT64 protection_key : 4; UINT64 execute_disable : 1; } flags; UINT64 value; }*PteAddress; BOOLEAN IsLargePage; } G_BIT_INFO, * PG_BIT_INFO; typedef struct _HOOK_INFO { void* OriginalAddress; void* HookAddress; UINT8 OriginalBytes[20]; UINT8 HookBytes[20]; UINT32 HookLength; BOOLEAN IsHooked; HANDLE ProcessId; union { struct { UINT64 present : 1; UINT64 write : 1; UINT64 user : 1; UINT64 write_through : 1; UINT64 cache_disable : 1; UINT64 accessed : 1; UINT64 dirty : 1; UINT64 pat : 1; UINT64 global : 1; UINT64 ignored_1 : 3; UINT64 page_frame_number : 36; UINT64 reserved_1 : 4; UINT64 ignored_2 : 7; UINT64 protection_key : 4; UINT64 execute_disable : 1; } flags; UINT64 value; }*HookedPte; union { struct { UINT64 present : 1; UINT64 write : 1; UINT64 user : 1; UINT64 write_through : 1; UINT64 cache_disable : 1; UINT64 accessed : 1; UINT64 dirty : 1; UINT64 large_page : 1; UINT64 global : 1; UINT64 ignored_2 : 3; UINT64 page_frame_number : 36; UINT64 reserved_1 : 4; UINT64 ignored_3 : 7; UINT64 protection_key : 4; UINT64 execute_disable : 1; } flags; UINT64 value; }*HookedPde; } HOOK_INFO; class PteHookManager { public: bool fn_pte_inline_hook_bp_pg(HANDLE process_id, _Inout_ void** ori_addr, void* hk_addr); bool fn_remove_hook(HANDLE process_id, void* hook_addr); static PteHookManager* GetInstance(); HOOK_INFO* GetHookInfo() { return m_HookInfo; } char* GetTrampLinePool() { return m_TrampLinePool; } UINT32 GetHookCount() { return m_HookCount; } bool fn_resume_global_bits(void* align_addr); ~PteHookManager(); // 添加析构函数声明 private: bool WriteTrampolineInstruction(void* trampoline, const JMP_ABS& jmpCmd); void fn_add_g_bit_info(void* align_addr, void* pde_address, void* pte_address); bool fn_isolation_pagetable(UINT64 cr3_val, void* replace_align_addr, void* split_pde); bool fn_isolation_pages(HANDLE process_id, void* ori_addr); bool fn_split_large_pages(void* in_pde, void* out_pde); NTSTATUS get_page_table(UINT64 cr3, PAGE_TABLE& table); void* fn_pa_to_va(UINT64 pa); UINT64 fn_va_to_pa(void* va); __forceinline KIRQL DisableWriteProtection(); __forceinline void EnableWriteProtection(KIRQL oldIrql); void logger(const char* info, bool is_err, LONG err_code = 0); void PrintPageTableInfo(const PAGE_TABLE& table); void PrintHookInfo(const HOOK_INFO& hookInfo); void PrintGBitInfo(const G_BIT_INFO& gbitInfo); static constexpr SIZE_T MAX_HOOKS = 256; // 根据需求调整 G_BIT_INFO m_GbitRecords[MAX_G_BIT_RECORDS]; UINT32 m_GbitCount = 0; void* m_PteBase = 0; HOOK_INFO m_HookInfo[MAX_HOOK_COUNT] = { 0 }; DWORD m_HookCount = 0; char* m_TrampLinePool = nullptr; // 合并为一个声明 UINT32 m_PoolUsed = 0; static PteHookManager* m_Instance; }; PteHookManager* PteHookManager::m_Instance = nullptr; // 实现部分 __forceinline KIRQL PteHookManager::DisableWriteProtection() { KIRQL oldIrql = KeRaiseIrqlToDpcLevel(); UINT64 cr0 = __readcr0(); __writecr0(cr0 & ~0x10000); _mm_mfence(); return oldIrql; } __forceinline void PteHookManager::EnableWriteProtection(KIRQL oldIrql) { _mm_mfence(); UINT64 cr0 = __readcr0(); __writecr0(cr0 | 0x10000); KeLowerIrql(oldIrql); } void PteHookManager::logger(const char* info, bool is_err, LONG err_code) { if (is_err) { DbgPrintEx(DPFLTR_IHVDRIVER_ID, DPFLTR_ERROR_LEVEL, "[PTE_HOOK] ERROR: %s (0x%X)\n", info, err_code); } else { DbgPrintEx(DPFLTR_IHVDRIVER_ID, DPFLTR_INFO_LEVEL, "[PTE_HOOK] INFO: %s\n", info); } } void PteHookManager::PrintPageTableInfo(const PAGE_TABLE& table) { DbgPrintEx(DPFLTR_IHVDRIVER_ID, DPFLTR_INFO_LEVEL, "[PTE_HOOK] Page Table Info for VA: 0x%p\n", (void*)table.LineAddress); DbgPrintEx(DPFLTR_IHVDRIVER_ID, DPFLTR_INFO_LEVEL, " PML4E: 0x%llx (Address: 0x%p)\n", table.OriginalPml4e, table.Pml4Address); DbgPrintEx(DPFLTR_IHVDRIVER_ID, DPFLTR_INFO_LEVEL, " PDPTE: 0x%llx (Address: 0x%p), Is1GBPage: %d\n", table.OriginalPdpte, table.PdpteAddress, table.Is1GBPage); DbgPrintEx(DPFLTR_IHVDRIVER_ID, DPFLTR_INFO_LEVEL, " PDE: 0x%llx (Address: 0x%p), IsLargePage: %d\n", table.OriginalPde, table.PdeAddress, table.IsLargePage); if (!table.IsLargePage && !table.Is1GBPage) { DbgPrintEx(DPFLTR_IHVDRIVER_ID, DPFLTR_INFO_LEVEL, " PTE: 0x%llx (Address: 0x%p)\n", table.OriginalPte, table.PteAddress); } } void PteHookManager::PrintHookInfo(const HOOK_INFO& hookInfo) { DbgPrintEx(DPFLTR_IHVDRIVER_ID, DPFLTR_INFO_LEVEL, "[PTE_HOOK] Hook Info:\n"); DbgPrintEx(DPFLTR_IHVDRIVER_ID, DPFLTR_INFO_LEVEL, " Original Address: 0x%p\n", hookInfo.OriginalAddress); DbgPrintEx(DPFLTR_IHVDRIVER_ID, DPFLTR_INFO_LEVEL, " Hook Address: 0x%p\n", hookInfo.HookAddress); DbgPrintEx(DPFLTR_IHVDRIVER_ID, DPFLTR_INFO_LEVEL, " Hook Length: %d\n", hookInfo.HookLength); DbgPrintEx(DPFLTR_IHVDRIVER_ID, DPFLTR_INFO_LEVEL, " Is Hooked: %d\n", hookInfo.IsHooked); // 打印原始字节 DbgPrintEx(DPFLTR_IHVDRIVER_ID, DPFLTR_INFO_LEVEL, " Original Bytes: "); for (UINT32 i = 0; i < sizeof(hookInfo.OriginalBytes); i++) { DbgPrintEx(DPFLTR_IHVDRIVER_ID, DPFLTR_INFO_LEVEL, "%02X ", hookInfo.OriginalBytes[i]); } DbgPrintEx(DPFLTR_IHVDRIVER_ID, DPFLTR_INFO_LEVEL, "\n"); // 打印Hook字节 DbgPrintEx(DPFLTR_IHVDRIVER_ID, DPFLTR_INFO_LEVEL, " Hook Bytes: "); for (UINT32 i = 0; i < sizeof(hookInfo.HookBytes); i++) { DbgPrintEx(DPFLTR_IHVDRIVER_ID, DPFLTR_INFO_LEVEL, "%02X ", hookInfo.HookBytes[i]); } DbgPrintEx(DPFLTR_IHVDRIVER_ID, DPFLTR_INFO_LEVEL, "\n"); } void PteHookManager::PrintGBitInfo(const G_BIT_INFO& gbitInfo) { DbgPrintEx(DPFLTR_IHVDRIVER_ID, DPFLTR_INFO_LEVEL, "[PTE_HOOK] G-Bit Info:\n"); DbgPrintEx(DPFLTR_IHVDRIVER_ID, DPFLTR_INFO_LEVEL, " Align Address: 0x%p\n", gbitInfo.AlignAddress); DbgPrintEx(DPFLTR_IHVDRIVER_ID, DPFLTR_INFO_LEVEL, " IsLargePage: %d\n", gbitInfo.IsLargePage); if (gbitInfo.PdeAddress) { DbgPrintEx(DPFLTR_IHVDRIVER_ID, DPFLTR_INFO_LEVEL, " PDE: 0x%llx (Address: 0x%p)\n", gbitInfo.PdeAddress->value, gbitInfo.PdeAddress); } if (gbitInfo.PteAddress) { DbgPrintEx(DPFLTR_IHVDRIVER_ID, DPFLTR_INFO_LEVEL, " PTE: 0x%llx (Address: 0x%p)\n", gbitInfo.PteAddress->value, gbitInfo.PteAddress); } } void* PteHookManager::fn_pa_to_va(UINT64 pa) { PHYSICAL_ADDRESS physAddr; physAddr.QuadPart = pa; return MmGetVirtualForPhysical(physAddr); } UINT64 PteHookManager::fn_va_to_pa(void* va) { PHYSICAL_ADDRESS physAddr = MmGetPhysicalAddress(va); return physAddr.QuadPart; } NTSTATUS PteHookManager::get_page_table(UINT64 cr3_val, PAGE_TABLE& table) { UINT64 va = table.LineAddress; UINT64 pml4e_index = (va >> 39) & 0x1FF; UINT64 pdpte_index = (va >> 30) & 0x1FF; UINT64 pde_index = (va >> 21) & 0x1FF; UINT64 pte_index = (va >> 12) & 0x1FF; // PML4 UINT64 pml4_pa = cr3_val & ~0xFFF; UINT64* pml4_va = (UINT64*)fn_pa_to_va(pml4_pa); if (!pml4_va) return STATUS_INVALID_ADDRESS; table.Pml4Address = &pml4_va[pml4e_index]; table.OriginalPml4e = *table.Pml4Address; if (!(table.OriginalPml4e & 1)) return STATUS_ACCESS_VIOLATION; // PDPTE UINT64 pdpte_pa = table.OriginalPml4e & ~0xFFF; UINT64* pdpte_va = (UINT64*)fn_pa_to_va(pdpte_pa); if (!pdpte_va) return STATUS_INVALID_ADDRESS; table.PdpteAddress = (decltype(table.PdpteAddress))&pdpte_va[pdpte_index]; table.OriginalPdpte = table.PdpteAddress->value; table.Is1GBPage = (table.PdpteAddress->flags.page_size) ? TRUE : FALSE; if (!(table.OriginalPdpte & 1)) return STATUS_ACCESS_VIOLATION; if (table.Is1GBPage) return STATUS_SUCCESS; // PDE UINT64 pde_pa = table.OriginalPdpte & ~0xFFF; UINT64* pde_va = (UINT64*)fn_pa_to_va(pde_pa); if (!pde_va) return STATUS_INVALID_ADDRESS; table.PdeAddress = (decltype(table.PdeAddress))&pde_va[pde_index]; table.OriginalPde = table.PdeAddress->value; table.IsLargePage = (table.PdeAddress->flags.large_page) ? TRUE : FALSE; if (!(table.OriginalPde & 1)) return STATUS_ACCESS_VIOLATION; if (table.IsLargePage) return STATUS_SUCCESS; // PTE UINT64 pte_pa = table.OriginalPde & ~0xFFF; UINT64* pte_va = (UINT64*)fn_pa_to_va(pte_pa); if (!pte_va) return STATUS_INVALID_ADDRESS; table.PteAddress = (decltype(table.PteAddress))&pte_va[pte_index]; table.OriginalPte = table.PteAddress->value; if (!(table.OriginalPte & 1)) return STATUS_ACCESS_VIOLATION; // 打印页表信息 PrintPageTableInfo(table); return STATUS_SUCCESS; } bool PteHookManager::fn_split_large_pages(void* in_pde_ptr, void* out_pde_ptr) { auto in_pde = (decltype(PAGE_TABLE::PdeAddress))in_pde_ptr; auto out_pde = (decltype(PAGE_TABLE::PdeAddress))out_pde_ptr; DbgPrintEx(DPFLTR_IHVDRIVER_ID, DPFLTR_INFO_LEVEL, "[PTE_HOOK] 正在拆分大页: 输入PDE=0x%llx, 输出PDE=0x%p\n", in_pde->value, out_pde); PHYSICAL_ADDRESS LowAddr = { 0 }, HighAddr = { 0 }; HighAddr.QuadPart = MAXULONG64; auto pt = (decltype(PAGE_TABLE::PteAddress))MmAllocateContiguousMemorySpecifyCache( PAGE_SIZE, LowAddr, HighAddr, LowAddr, MmNonCached); if (!pt) { logger("分配连续内存失败 (用于拆分大页)", true); return false; } UINT64 start_pfn = in_pde->flags.page_frame_number; for (int i = 0; i < 512; i++) { pt[i].value = 0; pt[i].flags.present = 1; pt[i].flags.write = in_pde->flags.write; pt[i].flags.user = in_pde->flags.user; pt[i].flags.write_through = in_pde->flags.write_through; pt[i].flags.cache_disable = in_pde->flags.cache_disable; pt[i].flags.accessed = in_pde->flags.accessed; pt[i].flags.dirty = in_pde->flags.dirty; pt[i].flags.global = 0; pt[i].flags.page_frame_number = start_pfn + i; } out_pde->value = in_pde->value; out_pde->flags.large_page = 0; out_pde->flags.page_frame_number = fn_va_to_pa(pt) >> 12; DbgPrintEx(DPFLTR_IHVDRIVER_ID, DPFLTR_INFO_LEVEL, "[PTE_HOOK] 大页拆分完成: 新PTE表物理地址=0x%llx\n", fn_va_to_pa(pt)); return true; } bool PteHookManager::fn_isolation_pagetable(UINT64 cr3_val, void* replace_align_addr, void* split_pde_ptr) { PHYSICAL_ADDRESS LowAddr = { 0 }, HighAddr = { 0 }; HighAddr.QuadPart = MAXULONG64; DbgPrintEx(DPFLTR_IHVDRIVER_ID, DPFLTR_INFO_LEVEL, "[PTE_HOOK] 开始隔离页表: CR3=0x%llx, 地址=0x%p\n", cr3_val, replace_align_addr); auto Va4kb = (UINT64*)MmAllocateContiguousMemorySpecifyCache(PAGE_SIZE, LowAddr, HighAddr, LowAddr, MmNonCached); auto VaPt = (UINT64*)MmAllocateContiguousMemorySpecifyCache(PAGE_SIZE, LowAddr, HighAddr, LowAddr, MmNonCached); auto VaPdt = (UINT64*)MmAllocateContiguousMemorySpecifyCache(PAGE_SIZE, LowAddr, HighAddr, LowAddr, MmNonCached); auto VaPdpt = (UINT64*)MmAllocateContiguousMemorySpecifyCache(PAGE_SIZE, LowAddr, HighAddr, LowAddr, MmNonCached); if (!VaPt || !Va4kb || !VaPdt || !VaPdpt) { if (VaPt) MmFreeContiguousMemory(VaPt); if (Va4kb) MmFreeContiguousMemory(Va4kb); if (VaPdt) MmFreeContiguousMemory(VaPdt); if (VaPdpt) MmFreeContiguousMemory(VaPdpt); logger("分配连续内存失败 (用于隔离页表)", true); return false; } PAGE_TABLE Table = { 0 }; Table.LineAddress = (UINT64)replace_align_addr; NTSTATUS status = get_page_table(cr3_val, Table); if (!NT_SUCCESS(status)) { MmFreeContiguousMemory(VaPt); MmFreeContiguousMemory(Va4kb); MmFreeContiguousMemory(VaPdt); MmFreeContiguousMemory(VaPdpt); logger("获取页表信息失败", true, status); return false; } UINT64 pte_index = (Table.LineAddress >> 12) & 0x1FF; UINT64 pde_index = (Table.LineAddress >> 21) & 0x1FF; UINT64 pdpte_index = (Table.LineAddress >> 30) & 0x1FF; UINT64 pml4e_index = (Table.LineAddress >> 39) & 0x1FF; memcpy(Va4kb, replace_align_addr, PAGE_SIZE); if (Table.IsLargePage && split_pde_ptr) { auto split_pde = (decltype(PAGE_TABLE::PdeAddress))split_pde_ptr; memcpy(VaPt, (void*)(split_pde->flags.page_frame_number << 12), PAGE_SIZE); } else { memcpy(VaPt, (void*)(Table.PdeAddress->flags.page_frame_number << 12), PAGE_SIZE); } memcpy(VaPdt, (void*)(Table.PdpteAddress->flags.page_frame_number << 12), PAGE_SIZE); memcpy(VaPdpt, (void*)(Table.Pml4Address[pml4e_index] & ~0xFFF), PAGE_SIZE); auto new_pte = (decltype(PAGE_TABLE::PteAddress))VaPt; new_pte[pte_index].flags.page_frame_number = fn_va_to_pa(Va4kb) >> 12; auto new_pde = (decltype(PAGE_TABLE::PdeAddress))VaPdt; new_pde[pde_index].value = Table.OriginalPde; new_pde[pde_index].flags.large_page = 0; new_pde[pde_index].flags.page_frame_number = fn_va_to_pa(VaPt) >> 12; auto new_pdpte = (decltype(PAGE_TABLE::PdpteAddress))VaPdpt; new_pdpte[pdpte_index].flags.page_frame_number = fn_va_to_pa(VaPdt) >> 12; auto new_pml4 = (UINT64*)fn_pa_to_va(cr3_val & ~0xFFF); new_pml4[pml4e_index] = (new_pml4[pml4e_index] & 0xFFF) | (fn_va_to_pa(VaPdpt) & ~0xFFF); __invlpg(replace_align_addr); DbgPrintEx(DPFLTR_IHVDRIVER_ID, DPFLTR_INFO_LEVEL, "[PTE_HOOK] 页表隔离完成: 新PFN=0x%llx\n", fn_va_to_pa(Va4kb) >> 12); return true; } bool PteHookManager::fn_isolation_pages(HANDLE process_id, void* ori_addr) { PEPROCESS Process; if (!NT_SUCCESS(PsLookupProcessByProcessId(process_id, &Process))) { logger("查找进程失败", true); return false; } DbgPrintEx(DPFLTR_IHVDRIVER_ID, DPFLTR_INFO_LEVEL, "[PTE_HOOK] 开始隔离页面: PID=%d, 地址=0x%p\n", (ULONG)(ULONG_PTR)process_id, ori_addr); KAPC_STATE ApcState; KeStackAttachProcess(Process, &ApcState); void* AlignAddr = PAGE_ALIGN(ori_addr); PAGE_TABLE Table = { 0 }; Table.LineAddress = (UINT64)AlignAddr; UINT64 target_cr3 = *(UINT64*)((UCHAR*)Process + 0x28); if (!NT_SUCCESS(get_page_table(target_cr3, Table))) { KeUnstackDetachProcess(&ApcState); ObDereferenceObject(Process); logger("获取目标进程页表失败", true); return false; } bool success = false; decltype(PAGE_TABLE::PdeAddress) split_pde = nullptr; if (Table.IsLargePage) { split_pde = (decltype(PAGE_TABLE::PdeAddress))ExAllocatePoolWithTag(NonPagedPool, sizeof(*split_pde), 'pdeS'); if (!split_pde || !fn_split_large_pages(Table.PdeAddress, split_pde)) { if (split_pde) ExFreePoolWithTag(split_pde, 'pdeS'); KeUnstackDetachProcess(&ApcState); ObDereferenceObject(Process); logger("拆分大页失败", true); return false; } if (Table.PdeAddress->flags.global) { Table.PdeAddress->flags.global = 0; fn_add_g_bit_info(AlignAddr, Table.PdeAddress, nullptr); DbgPrintEx(DPFLTR_IHVDRIVER_ID, DPFLTR_INFO_LEVEL, "[PTE_HOOK] 清除大页G位: PDE=0x%llx\n", Table.PdeAddress->value); } } else if (Table.PteAddress && Table.PteAddress->flags.global) { Table.PteAddress->flags.global = 0; fn_add_g_bit_info(AlignAddr, nullptr, Table.PteAddress); DbgPrintEx(DPFLTR_IHVDRIVER_ID, DPFLTR_INFO_LEVEL, "[PTE_HOOK] 清除PTE G位: PTE=0x%llx\n", Table.PteAddress->value); success = fn_isolation_pagetable(__readcr3(), AlignAddr, split_pde); if (split_pde) ExFreePoolWithTag(split_pde, 'pdeS'); DbgPrintEx(DPFLTR_IHVDRIVER_ID, DPFLTR_INFO_LEVEL, "[PTE_HOOK] 页表状态: IsLargePage=%d, Is1GBPage=%d\n", Table.IsLargePage, Table.Is1GBPage); if (Table.PteAddress) { DbgPrintEx(DPFLTR_IHVDRIVER_ID, DPFLTR_INFO_LEVEL, "[PTE_HOOK] PTE 值: 0x%llx (G位=%d)\n", Table.PteAddress->value, Table.PteAddress->flags.global); } KeUnstackDetachProcess(&ApcState); ObDereferenceObject(Process); if (success) { DbgPrintEx(DPFLTR_IHVDRIVER_ID, DPFLTR_INFO_LEVEL, "[PTE_HOOK] 页面隔离成功\n"); } else { logger("页面隔离失败", true); } return success; } KeUnstackDetachProcess(&ApcState); ObDereferenceObject(Process); return true; } bool PteHookManager::WriteTrampolineInstruction(void* trampoline, const JMP_ABS& jmpCmd) { if (!MmIsAddressValid(trampoline)) { DbgPrintEx(DPFLTR_IHVDRIVER_ID, DPFLTR_ERROR_LEVEL, "[PTE_HOOK] 错误: 内存地址无效 (VA=%p)\n", trampoline); return false; } PHYSICAL_ADDRESS physAddr = MmGetPhysicalAddress(trampoline); if (physAddr.QuadPart == 0) { DbgPrintEx(DPFLTR_IHVDRIVER_ID, DPFLTR_ERROR_LEVEL, "[PTE_HOOK] 错误: 无法获取物理地址 (VA=%p)\n", trampoline); return false; } KIRQL oldIrql = KeRaiseIrqlToDpcLevel(); BOOLEAN wpEnabled = (__readcr0() & CR0_WP); if (wpEnabled) { __writecr0(__readcr0() & ~CR0_WP); _mm_mfence(); } PMDL pMdl = IoAllocateMdl(trampoline, sizeof(JMP_ABS), FALSE, FALSE, NULL); if (!pMdl) { if (wpEnabled) __writecr0(__readcr0() | CR0_WP); KeLowerIrql(oldIrql); return false; } NTSTATUS status = STATUS_SUCCESS; __try { MmBuildMdlForNonPagedPool(pMdl); MmProtectMdlSystemAddress(pMdl, PAGE_READWRITE); // 正确写入 FF25 00000000 和 8字节地址 memcpy(trampoline, jmpCmd.opcode, 6); // FF25 00000000 *(ULONG64*)((BYTE*)trampoline + 6) = jmpCmd.address; // 地址写入 RIP+0 的位置 _mm_sfence(); _mm_clflush(trampoline); _mm_clflush((BYTE*)trampoline + 8); __invlpg(trampoline); _mm_mfence(); } __except (EXCEPTION_EXECUTE_HANDLER) { status = GetExceptionCode(); DbgPrintEx(DPFLTR_IHVDRIVER_ID, DPFLTR_ERROR_LEVEL, "[PTE_HOOK] 异常: 写入跳板失败 (代码: 0x%X)\n", status); } IoFreeMdl(pMdl); if (wpEnabled) { __writecr0(__readcr0() | CR0_WP); _mm_mfence(); } KeLowerIrql(oldIrql); if (!NT_SUCCESS(status)) return false; // 验证写入结果 if (*(USHORT*)trampoline != 0x25FF || *(ULONG64*)((BYTE*)trampoline + 6) != jmpCmd.address) { DbgPrintEx(DPFLTR_IHVDRIVER_ID, DPFLTR_ERROR_LEVEL, "[PTE_HOOK] 验证失败: 跳板内容不匹配\n" " 预期: FF25 [%p]\n" " 实际: %02X%02X %02X%02X%02X%02X [%p]\n", jmpCmd.address, ((BYTE*)trampoline)[0], ((BYTE*)trampoline)[1], ((BYTE*)trampoline)[2], ((BYTE*)trampoline)[3], ((BYTE*)trampoline)[4], ((BYTE*)trampoline)[5], *(ULONG64*)((BYTE*)trampoline + 6)); return false; } return true; } bool PteHookManager::fn_pte_inline_hook_bp_pg(HANDLE process_id, _Inout_ void** ori_addr, void* hk_addr) { if (!ori_addr || !hk_addr || !*ori_addr) { DbgPrintEx(DPFLTR_IHVDRIVER_ID, DPFLTR_ERROR_LEVEL, "[PTE_HOOK] 错误: 无效参数 (ori_addr=%p, hk_addr=%p)\n", ori_addr, hk_addr); return false; } if (!m_TrampLinePool) { PHYSICAL_ADDRESS LowAddr = { LowAddr.QuadPart = 0x100000 }; PHYSICAL_ADDRESS HighAddr = { HighAddr.QuadPart = ~0ull }; m_TrampLinePool = (char*)MmAllocateContiguousMemorySpecifyCache( PAGE_SIZE * 8, LowAddr, HighAddr, LowAddr, MmNonCached); if (!m_TrampLinePool) { DbgPrintEx(DPFLTR_IHVDRIVER_ID, DPFLTR_ERROR_LEVEL, "[PTE_HOOK] 错误: 无法分配跳板池内存\n"); return false; } PMDL pMdl = IoAllocateMdl(m_TrampLinePool, PAGE_SIZE * 8, FALSE, FALSE, NULL); if (pMdl) { MmBuildMdlForNonPagedPool(pMdl); MmProtectMdlSystemAddress(pMdl, PAGE_EXECUTE_READWRITE); IoFreeMdl(pMdl); } } // 构造正确的跳转结构 JMP_ABS jmpCmd = {}; memcpy(jmpCmd.opcode, "\xFF\x25\x00\x00\x00\x00", 6); // FF25 00000000 jmpCmd.address = reinterpret_cast<ULONG64>(hk_addr); // 确保是完整的 64 位地址 void* trampoline = (void*)((ULONG_PTR)(m_TrampLinePool + m_PoolUsed + 15) & ~15); SIZE_T requiredSize = ((char*)trampoline - m_TrampLinePool) + sizeof(JMP_ABS); if (requiredSize > PAGE_SIZE * 8) { DbgPrintEx(DPFLTR_IHVDRIVER_ID, DPFLTR_ERROR_LEVEL, "[PTE_HOOK] 错误: 跳板池空间不足\n"); return false; } if (!WriteTrampolineInstruction(trampoline, jmpCmd)) { return false; } for (UINT32 i = 0; i < MAX_HOOK_COUNT; i++) { if (!m_HookInfo[i].IsHooked) { m_HookInfo[i].OriginalAddress = *ori_addr; m_HookInfo[i].HookAddress = trampoline; m_HookInfo[i].ProcessId = process_id; m_HookInfo[i].IsHooked = TRUE; RtlCopyMemory(m_HookInfo[i].HookBytes, &jmpCmd, sizeof(jmpCmd)); m_HookCount++; break; } } *ori_addr = trampoline; m_PoolUsed = (UINT32)requiredSize; DbgPrintEx(DPFLTR_IHVDRIVER_ID, DPFLTR_INFO_LEVEL, "[PTE_HOOK] Hook安装成功!跳板指令:\n" " jmp [0x%p] -> 0x%p\n", (char*)trampoline + 6, hk_addr); return true; } // 析构函数清理资源 PteHookManager::~PteHookManager() { if (m_TrampLinePool) { MmFreeContiguousMemory(m_TrampLinePool); m_TrampLinePool = nullptr; } } bool PteHookManager::fn_remove_hook(HANDLE process_id, void* hook_addr) { DbgPrintEx(DPFLTR_IHVDRIVER_ID, DPFLTR_INFO_LEVEL, "[PTE_HOOK] 尝试移除Hook: Hook地址=0x%p\n", hook_addr); for (UINT32 i = 0; i < m_HookCount; i++) { if (m_HookInfo[i].HookAddress == hook_addr && m_HookInfo[i].IsHooked) { DbgPrintEx(DPFLTR_IHVDRIVER_ID, DPFLTR_INFO_LEVEL, "[PTE_HOOK] 找到匹配的Hook: 原始地址=0x%p\n", m_HookInfo[i].OriginalAddress); KIRQL oldIrql = DisableWriteProtection(); memcpy(m_HookInfo[i].OriginalAddress, m_HookInfo[i].OriginalBytes, sizeof(m_HookInfo[i].OriginalBytes)); EnableWriteProtection(oldIrql); m_HookInfo[i].IsHooked = FALSE; DbgPrintEx(DPFLTR_IHVDRIVER_ID, DPFLTR_INFO_LEVEL, "[PTE_HOOK] Hook已成功移除\n"); return true; } } logger("未找到匹配的Hook", true); return false; } void PteHookManager::fn_add_g_bit_info(void* align_addr, void* pde_address, void* pte_address) { if (m_GbitCount >= MAX_G_BIT_RECORDS) { logger("达到最大G位记录数量限制", true); return; } PG_BIT_INFO record = &m_GbitRecords[m_GbitCount++]; record->AlignAddress = align_addr; record->PdeAddress = (decltype(G_BIT_INFO::PdeAddress))pde_address; record->PteAddress = (decltype(G_BIT_INFO::PteAddress))pte_address; record->IsLargePage = (pde_address && ((decltype(PAGE_TABLE::PdeAddress))pde_address)->flags.large_page); // 打印G位信息 PrintGBitInfo(*record); } bool PteHookManager::fn_resume_global_bits(void* align_addr) { KIRQL oldIrql = DisableWriteProtection(); bool found = false; DbgPrintEx(DPFLTR_ERROR_LEVEL, DPFLTR_INFO_LEVEL, "[PTE_HOOK] 开始恢复G位: 对齐地址=0x%p\n", align_addr); for (UINT32 i = 0; i < m_GbitCount; i++) { PG_BIT_INFO record = &m_GbitRecords[i]; if (align_addr && record->AlignAddress != align_addr) continue; if (record->PteAddress) { record->PteAddress->flags.global = 1; __invlpg(record->AlignAddress); DbgPrintEx(DPFLTR_ERROR_LEVEL, DPFLTR_INFO_LEVEL, " 恢复PTE G位: PTE=0x%llx, 地址=0x%p\n", record->PteAddress->value, record->AlignAddress); } if (record->PdeAddress) { record->PdeAddress->flags.global = 1; if (record->IsLargePage) { __invlpg(record->AlignAddress); } DbgPrintEx(DPFLTR_ERROR_LEVEL, DPFLTR_INFO_LEVEL, " 恢复PDE G位: PDE=0x%llx, 地址=0x%p, 大页=%d\n", record->PdeAddress->value, record->AlignAddress, record->IsLargePage); } found = true; if (align_addr) break; } EnableWriteProtection(oldIrql); if (found) { DbgPrintEx(DPFLTR_ERROR_LEVEL, DPFLTR_INFO_LEVEL, "[PTE_HOOK] G位恢复完成\n"); } else { logger("未找到匹配的G位记录", true); } return found; } PteHookManager* PteHookManager::GetInstance() { if (!m_Instance) { m_Instance = static_cast<PteHookManager*>( ExAllocatePoolWithTag(NonPagedPool, sizeof(PteHookManager), 'tpHk')); if (m_Instance) { RtlZeroMemory(m_Instance, sizeof(PteHookManager)); DbgPrintEx(DPFLTR_ERROR_LEVEL, DPFLTR_INFO_LEVEL, "[PTE_HOOK] PTE Hook管理器实例已创建: 地址=0x%p\n", m_Instance); } else { DbgPrintEx(DPFLTR_ERROR_LEVEL, DPFLTR_ERROR_LEVEL, "[PTE_HOOK] 创建PTE Hook管理器实例失败\n"); } } return m_Instance; } // 全局PTE Hook管理器实例 PteHookManager* g_PteHookManager = nullptr; // 辅助函数:检查是否为目标进程 BOOLEAN IsTargetProcess(CHAR* imageName) { CHAR currentName[16]; // 复制到本地缓冲区并确保 NULL 终止 RtlCopyMemory(currentName, imageName, 16); currentName[15] = '\0'; // 确保终止 // 修剪尾部空格 for (int i = 15; i >= 0; i--) { if (currentName[i] == ' ') currentName[i] = '\0'; else if (currentName[i] != '\0') break; } return (strcmp(currentName, target_process_name) == 0); } // Hook 函数 NTSTATUS MyObReferenceObjectByHandleWithTag( HANDLE Handle, ACCESS_MASK DesiredAccess, POBJECT_TYPE ObjectType, KPROCESSOR_MODE AccessMode, ULONG Tag, PVOID* Object, POBJECT_HANDLE_INFORMATION HandleInformation ) { if (Object == NULL) { DbgPrint("[-] Invalid Object pointer (NULL) detected!"); return STATUS_INVALID_PARAMETER; } __debugbreak(); // 强制下,确认是否执行到这里 PEPROCESS currentProcess = PsGetCurrentProcess(); CHAR* imageName = PsGetProcessImageFileName(currentProcess); // 如果是目标进程,则拒绝所有访问 if (IsTargetProcess(imageName)) { return STATUS_ACCESS_DENIED; } // 否则调用原始函数 return g_OriginalObReferenceObjectByHandleWithTag( Handle, DesiredAccess, ObjectType, AccessMode, Tag, Object, HandleInformation ); } // 安装 Hook NTSTATUS InstallHook() { UNICODE_STRING funcName; RtlInitUnicodeString(&funcName, L"ObReferenceObjectByHandleWithTag"); g_OriginalObReferenceObjectByHandleWithTag = (fn_ObReferenceObjectByHandleWithTag)MmGetSystemRoutineAddress(&funcName); if (!g_OriginalObReferenceObjectByHandleWithTag) { DbgPrint("[-] Failed to find ObReferenceObjectByHandleWithTag\n"); return STATUS_NOT_FOUND; } DbgPrint("[+] Found ObReferenceObjectByHandleWithTag at: %p\n", g_OriginalObReferenceObjectByHandleWithTag); // 使用PTE Hook管理器进行挂钩 if (!g_PteHookManager) { DbgPrint("[-] PTE Hook manager not initialized\n"); return STATUS_UNSUCCESSFUL; } void* targetFunc = (void*)g_OriginalObReferenceObjectByHandleWithTag; void* hookFunc = (void*)MyObReferenceObjectByHandleWithTag; HANDLE currentProcessId = PsGetCurrentProcessId(); // 安装PTE Hook if (!g_PteHookManager->fn_pte_inline_hook_bp_pg(currentProcessId, &targetFunc, hookFunc)) { DbgPrint("[-] PTE hook installation failed\n"); return STATUS_UNSUCCESSFUL; } // 更新原始函数指针指向跳板 g_OriginalObReferenceObjectByHandleWithTag = (fn_ObReferenceObjectByHandleWithTag)targetFunc; DbgPrint("[+] Hook installed successfully. Trampoline at %p\n", targetFunc); return STATUS_SUCCESS; } // 移除 Hook VOID RemoveHook() { if (g_OriginalObReferenceObjectByHandleWithTag && g_PteHookManager) { g_PteHookManager->fn_remove_hook(PsGetCurrentProcessId(), (void*)MyObReferenceObjectByHandleWithTag); } } // 工作线程函数 VOID InstallHookWorker(PVOID Context) { UNREFERENCED_PARAMETER(Context); DbgPrint("[+] Worker thread started for hook installation\n"); InstallHook(); PsTerminateSystemThread(STATUS_SUCCESS); } // 进程创建回调 VOID ProcessNotifyCallback( _In_ HANDLE ParentId, _In_ HANDLE ProcessId, _In_ BOOLEAN Create ) { UNREFERENCED_PARAMETER(ParentId); if (Create) { PEPROCESS process = NULL; if (NT_SUCCESS(PsLookupProcessByProcessId(ProcessId, &process))) { CHAR* imageName = PsGetProcessImageFileName(process); CHAR currentName[16]; RtlCopyMemory(currentName, imageName, 16); currentName[15] = '\0'; for (int i = 15; i >= 0; i--) { if (currentName[i] == ' ') currentName[i] = '\0'; else if (currentName[i] != '\0') break; } if (strcmp(currentName, target_process_name) == 0) { DbgPrint("[+] Target process %s created (PID: %d)\n", currentName, HandleToULong(ProcessId)); // 创建工作线程来安装 Hook HANDLE threadHandle; NTSTATUS status = PsCreateSystemThread( &threadHandle, THREAD_ALL_ACCESS, NULL, NULL, NULL, InstallHookWorker, NULL ); if (NT_SUCCESS(status)) { ZwClose(threadHandle); DbgPrint("[+] Worker thread created for hook installation\n"); } else { DbgPrint("[-] Failed to create worker thread: 0x%X\n", status); } } ObDereferenceObject(process); } } } // 驱动卸载函数 VOID DriverUnload(PDRIVER_OBJECT DriverObject) { UNREFERENCED_PARAMETER(DriverObject); DbgPrint("[+] Driver unloading...\n"); // 移除进程通知回调 PsSetCreateProcessNotifyRoutineEx((PCREATE_PROCESS_NOTIFY_ROUTINE_EX)ProcessNotifyCallback, TRUE); // 移除Hook RemoveHook(); // 清理PTE Hook资源 if (g_PteHookManager) { DbgPrint("[PTE_HOOK] Cleaning up PTE...\n"); // 恢复所有被修改的G位 g_PteHookManager->fn_resume_global_bits(nullptr); // 移除所有活动的Hook HOOK_INFO* hookInfo = g_PteHookManager->GetHookInfo(); UINT32 hookCount = g_PteHookManager->GetHookCount(); for (UINT32 i = 0; i < hookCount; i++) { if (hookInfo[i].IsHooked) { g_PteHookManager->fn_remove_hook(PsGetCurrentProcessId(), hookInfo[i].HookAddress); } } // 释放跳板池内存 char* trampLinePool = g_PteHookManager->GetTrampLinePool(); if (trampLinePool) { ExFreePoolWithTag(trampLinePool, 'JmpP'); } // 释放管理器实例 ExFreePoolWithTag(g_PteHookManager, 'tpHk'); g_PteHookManager = nullptr; } DbgPrint("[+] Driver unloaded successfully\n"); } extern "C" NTSTATUS DriverEntry(PDRIVER_OBJECT DriverObject, PUNICODE_STRING RegistryPath) { UNREFERENCED_PARAMETER(RegistryPath); DriverObject->DriverUnload = DriverUnload; // 初始化PTE Hook管理器 g_PteHookManager = PteHookManager::GetInstance(); if (!g_PteHookManager) { DbgPrint("[-] Failed to initialize PTE Hook manager\n"); return STATUS_INSUFFICIENT_RESOURCES; } // 注册进程通知回调 NTSTATUS status = PsSetCreateProcessNotifyRoutineEx((PCREATE_PROCESS_NOTIFY_ROUTINE_EX)ProcessNotifyCallback, FALSE); if (!NT_SUCCESS(status)) { DbgPrint("[-] Failed to register process notify callback (0x%X)\n", status); return status; } DbgPrint("[+] Driver loaded successfully\n"); return STATUS_SUCCESS; } 我这个整个代码没问题吗? void fn_add_g_bit_info(void* align_addr, void* pde_address, void* pte_address); bool fn_isolation_pagetable(UINT64 cr3_val, void* replace_align_addr, void* split_pde); bool fn_isolation_pages(HANDLE process_id, void* ori_addr); bool fn_split_large_pages(void* in_pde, void* out_pde); NTSTATUS get_page_table(UINT64 cr3, PAGE_TABLE& table); void* fn_pa_to_va(UINT64 pa); UINT64 fn_va_to_pa(void* va); __forceinline KIRQL DisableWriteProtection(); __forceinline void EnableWriteProtection(KIRQL oldIrql); void logger(const char* info, bool is_err, LONG err_code = 0); void PrintPageTableInfo(const PAGE_TABLE& table); void PrintHookInfo(const HOOK_INFO& hookInfo); void PrintGBitInfo(const G_BIT_INFO& gbitInfo);这里面的打印函数都没有打印,我都怀疑有没有执行这些代码
06-25
<think> 首先,用户询问的是关于 `DebugBreak()` 函数的功能、使用方法和相关介绍。系统指令要求所有数学表达式使用特定格式,但由于这是一个编程相关的问题,可能不会涉及数学表达式,所以我需要确保如果有数学内容,就正确格式化。 系统要求: - 使用中文回答。 - 结构清晰,帮助用户逐步解决问题。 - 回答真实可靠,基于提供的引用。 - 在引用的段落末尾自然地添加引用标识,如[^1]、[^2]等。 - 生成相关问题(§§相关问题§§)。 - 参考站内引用,这些引用已经给出:[^1]、[^2]、[^3]、[^4]。 提供的引用: - [^1]: DebugBreak 是系统 API 函数,调用它让调试器中下来,以便查看调用堆栈。 - [^2]: DebugBreak() 函数帮助调试应用程序,执行到该函数时暂停并进入调试模式,显示上下文信息,用于即时调试。 - [^3]: 介绍 Visual C++ 内建函数,包括 __debugbreak,讨论作用、使用方法等。 - [^4]: 关于 RGB() 函数,似乎不相关,因为是 PB(PowerBuilder)系统函数。 用户的问题是针对 `DebugBreak()`,所以我应该专注于相关的引用:[^1]、[^2]、[^3]。 关键点从引用中提取: - 功能:调用 DebugBreak() 会导致调试器中当前执行,允许开发者检查调用堆栈和上下文信息。[^1], [^2] - 使用方法:在代码中插入 DebugBreak() 语句,当执行到该点时,调试器会中,打开调试窗口。[^2] - 相关介绍:它是 Visual C++ 的内建函数之一,用于调试目的。[^3] - 注意:在[^2]中提到了 PowerBuilder 的上下文,但 DebugBreak() 是一个通用的 Windows API 函数,也存在于其他环境中。 我需要整合这些信息,清晰地结构回答。 回答结构: 1. **介绍功能**:解释 DebugBreak() 的功能和作用。 2. **使用方法**:描述如何在代码中使用它。 3. **相关介绍**:提供背景信息,如它是系统 API 或内建函数。 4. **注意事项**:如果有任何警告或最佳实践。 5. **添加引用标识**:在相关部分的末尾自然地添加引用。 6. **生成相关问题**:在最后生成相关问题。 确保语言是中文。 大纲回答: - 开头:直接回应问题,概述 DebugBreak()。 - 功能:详细说明功能。 - 使用方法:解释用法。 - 相关介绍:讨论它是哪个库或环境的一部分。 - 结尾:总结。 - 相关问题:生成几个相关问题。 生成相关问题: - 基于主题,如调试技巧、其他调试函数等。 相关问题示例: 1. DebugBreak() 在哪些编程环境中可用? 2. 使用 DebugBreak() 有什么注意事项? 3. 如何避免在生产环境中意外调用 DebugBreak()? 4. 其他类似的调试函数有哪些? 最后,添加引用标识:例如,如果一个句子基于[^1],就在句末加 [^1]。 完整回答: - 逐步解释。 </think> ### DebugBreak() 函数介绍 `DebugBreak()` 是一个用于软件开发调试的系统级函数,主要用于在代码执行过程中主动触发调试器中,便于开发者检查程序状态(如调用堆栈、变量值等)。下面我将从功能、使用方法和相关介绍三个方面逐步为您详细解释,确保内容清晰可靠。所有描述基于提供的引用资料 [^1]、[^2] 和 [^3],我会在相关段落末尾添加引用标识。 #### 1. **功能** `DebugBreak()` 的核心功能是强制中当前正在运行的应用程序,并将控制权交给附加的调试器(如 Visual Studio、WinDbg 或 PowerBuilder IDE)。当调试器中时,开发者可以立即查看此时的函数调用堆栈、内存状态和上下文信息,从而快速诊问题(如崩溃、逻辑错误或异常)。这类似于在代码中设置一个“点”,但它是通过程序指令动态触发的,而不是在开发环境中静态设置。此函数常用于即时调试场景,有助于在不暂停整个程序的情况下定位特定代码段的错误 [^1] [^2]。 #### 2. **使用方法** `DebugBreak()` 的使用方法相对简单,只需在代码中插入函数调用语句。以下是具体步骤和示例: - **基本用法**:在需要中执行的位置添加 `DebugBreak()` 函数。当程序运行到该点时,调试器会自动暂停并打开调试窗口,显示当前上下文(如寄存器的值、局部变量和堆栈跟踪)。 - 示例代码(以 C++ 为例,适用于 Visual Studio): ```cpp #include <windows.h> // 引入 Windows API 头文件 void someFunction() { // 正常业务逻辑 int x = 10; DebugBreak(); // 调用 DebugBreak(),执行到此会中到调试器 // 后续代码(中后可检查 x 的值或堆栈) } ``` 在 PowerBuilder 等环境中使用时,原理类似,只需在脚本中直接调用 `DebugBreak()`,IDE 会自动捕获中 [^2]。 - **注意事项**: - **调试环境依赖**:此函数只在应用程序被调试器附加时生效(如在开发或测试阶段)。如果程序在没有调试器的情况下运行(如发布版本),`DebugBreak()` 可能触发程序崩溃或忽略该指令。 - **跨平台兼容性**:`DebugBreak()` 是 Windows 系统 API 的一部分,也作为 Visual C++ 的内建函数(如 `__debugbreak`)提供。在其他平台(如 Linux)中,可以使用类似函数(如 `raise(SIGTRAP)`)[^3]。 - **安全最佳实践**:建议在调试完成后移除或注释掉 `DebugBreak()` 语句,以避免在生产环境中意外中。可以使用预处理指令(如 `#ifdef DEBUG`)来控制其只在调试构建中启用 [^3]。 #### 3. **相关介绍** `DebugBreak()` 属于系统级调试 API,起源于 Windows 平台,并被集成到多种开发工具中: - **背景**:它是 Visual C++ 编译器提供的内建函数之一(例如 `__debugbreak`),与标准库配合使用,简化调试过程。Visual C++ 提供的内建函数(如 `__assume` 和 `__cpuid`)共同优化了性能和可靠性,`DebugBreak()` 专注于即时调试功能 [^3]。 - **工作机制**:当调用 `DebugBreak()` 时,它会生成一个调试中(通常是通过抛出 `EXCEPTION_BREAKPOINT` 异常),调试器捕获此中后暂停执行。这类似于触发一个软中(INT 3指令),允许开发者“冻结”程序状态进行分析 [^1]。 - **适用场景**:常用于以下情况: - 诊特定代码路径的错误(如当某个条件为真时中)。 - 在复杂逻辑中模拟点,替代传统调试操作。 - 集成到自动化测试脚本中,配合日志记录工具进行问题追踪 [^2]。 总之,`DebugBreak()` 是一个强大的调试辅助工具,能显著提高开发效率。但使用时需注意环境依赖和安全性,避免影响生产系统 [^1] [^2] [^3]。
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