ホーム › System.Diagnostics.Debug › GetThreadContext

GetThreadContext

関数

指定スレッドのレジスタなどのコンテキストを取得する。

DLLKERNEL32.dll呼出規約winapiSetLastErrorあり対応OSWindows XP 以降

シグネチャ

// KERNEL32.dll
#include <windows.h>

BOOL GetThreadContext(
    HANDLE hThread,
    CONTEXT* lpContext
);

パラメーター

名前	型	方向
hThread	HANDLE	in
lpContext	CONTEXT*	inout

戻り値の型: BOOL

各言語での呼び出し定義

// KERNEL32.dll
#include <windows.h>

BOOL GetThreadContext(
    HANDLE hThread,
    CONTEXT* lpContext
);

[return: MarshalAs(UnmanagedType.Bool)]
[DllImport("KERNEL32.dll", SetLastError = true, ExactSpelling = true)]
static extern bool GetThreadContext(
    IntPtr hThread,   // HANDLE
    IntPtr lpContext   // CONTEXT* in/out
);

<DllImport("KERNEL32.dll", SetLastError:=True, ExactSpelling:=True)>
Public Shared Function GetThreadContext(
    hThread As IntPtr,   ' HANDLE
    lpContext As IntPtr   ' CONTEXT* in/out
) As Boolean
End Function

' hThread : HANDLE
' lpContext : CONTEXT* in/out
Declare PtrSafe Function GetThreadContext Lib "kernel32" ( _
    ByVal hThread As LongPtr, _
    ByVal lpContext As LongPtr) As Long
' VBA7前提(PtrSafe)。32bit Office では LongPtr→Long。Integer=16bit / Long=32bit / LongLong=64bit。

import ctypes
from ctypes import wintypes

GetThreadContext = ctypes.windll.kernel32.GetThreadContext
GetThreadContext.restype = wintypes.BOOL
GetThreadContext.argtypes = [
    wintypes.HANDLE,  # hThread : HANDLE
    ctypes.c_void_p,  # lpContext : CONTEXT* in/out
]
# GetLastError: use ctypes.GetLastError() (or ctypes.WinDLL(use_last_error=True))

require 'fiddle'
require 'fiddle/import'

lib = Fiddle.dlopen('KERNEL32.dll')
GetThreadContext = Fiddle::Function.new(
  lib['GetThreadContext'],
  [
    Fiddle::TYPE_VOIDP,  # hThread : HANDLE
    Fiddle::TYPE_VOIDP,  # lpContext : CONTEXT* in/out
  ],
  Fiddle::TYPE_INT)

#[link(name = "kernel32")]
extern "system" {
    fn GetThreadContext(
        hThread: *mut core::ffi::c_void,  // HANDLE
        lpContext: *mut CONTEXT  // CONTEXT* in/out
    ) -> i32;
}
// crates: windows-sys provides ready-made bindings for this API.

$sig = @"
[return: MarshalAs(UnmanagedType.Bool)]
[DllImport("KERNEL32.dll", SetLastError = true)]
public static extern bool GetThreadContext(IntPtr hThread, IntPtr lpContext);
"@
$api = Add-Type -MemberDefinition $sig -Name 'KERNEL32_GetThreadContext' -Namespace Win32 -PassThru
# $api::GetThreadContext(hThread, lpContext)

#uselib "KERNEL32.dll"
#func global GetThreadContext "GetThreadContext" sptr, sptr
; GetThreadContext hThread, varptr(lpContext)   ; 戻り値は stat
; hThread : HANDLE -> "sptr"
; lpContext : CONTEXT* in/out -> "sptr"
; ※HSP3.7は #func のため戻り値はシステム変数 stat に格納されます。

出力引数:

#uselib "KERNEL32.dll"
#cfunc global GetThreadContext "GetThreadContext" sptr, var
; res = GetThreadContext(hThread, lpContext)
; hThread : HANDLE -> "sptr"
; lpContext : CONTEXT* in/out -> "var"
; ※出力/バッファ引数は var 方式(変数を直接渡す)。varptr 方式にも切替可。#uselib "KERNEL32.dll"
#cfunc global GetThreadContext "GetThreadContext" sptr, sptr
; res = GetThreadContext(hThread, varptr(lpContext))
; hThread : HANDLE -> "sptr"
; lpContext : CONTEXT* in/out -> "sptr"
; ※出力/バッファ引数はポインタ方式(token=sptr / 呼び出しは varptr(変数))。

出力引数:

; BOOL GetThreadContext(HANDLE hThread, CONTEXT* lpContext)
#uselib "KERNEL32.dll"
#cfunc global GetThreadContext "GetThreadContext" intptr, var
; res = GetThreadContext(hThread, lpContext)
; hThread : HANDLE -> "intptr"
; lpContext : CONTEXT* in/out -> "var"
; ※出力/バッファ引数は var 方式(変数を直接渡す)。varptr 方式にも切替可。; BOOL GetThreadContext(HANDLE hThread, CONTEXT* lpContext)
#uselib "KERNEL32.dll"
#cfunc global GetThreadContext "GetThreadContext" intptr, intptr
; res = GetThreadContext(hThread, varptr(lpContext))
; hThread : HANDLE -> "intptr"
; lpContext : CONTEXT* in/out -> "intptr"
; ※出力/バッファ引数はポインタ方式(token=intptr / 呼び出しは varptr(変数))。

import (
	"golang.org/x/sys/windows"
	"unsafe"
)

var (
	kernel32 = windows.NewLazySystemDLL("KERNEL32.dll")
	procGetThreadContext = kernel32.NewProc("GetThreadContext")
)

// hThread (HANDLE), lpContext (CONTEXT* in/out)
r1, _, err := procGetThreadContext.Call(
	uintptr(hThread),
	uintptr(lpContext),
)
_ = err  // syscall.Errno (valid when the call sets last-error)
_ = r1   // BOOL

function GetThreadContext(
  hThread: THandle;   // HANDLE
  lpContext: Pointer   // CONTEXT* in/out
): BOOL; stdcall;
  external 'KERNEL32.dll' name 'GetThreadContext';

result := DllCall("KERNEL32\GetThreadContext"
    , "Ptr", hThread   ; HANDLE
    , "Ptr", lpContext   ; CONTEXT* in/out
    , "Int")   ; return: BOOL

●GetThreadContext(hThread, lpContext) = DLL("KERNEL32.dll", "bool GetThreadContext(void*, void*)")
# 呼び出し: GetThreadContext(hThread, lpContext)
# hThread : HANDLE -> "void*"
# lpContext : CONTEXT* in/out -> "void*"
# なでしこ1は32bit・ANSI(Shift_JIS)。文字列=char*(ANSI)、ポインタ/ハンドル=void*(4byte)。