我试图从我创建的JNA接口调用system32的CreateProcessW。问题是，当我从32位JRE运行软件时，它运行良好，但是当我移至64位JRE时，它使JVM崩溃。
Kernel32 kernel = (Kernel32) Native.loadLibrary("kernel32",
Kernel32.class, new HashMap<String, Object>() {
private static final long serialVersionUID = 1L;
{
put(Library.OPTION_FUNCTION_MAPPER,
W32APIFunctionMapper.UNICODE);
put(Library.OPTION_TYPE_MAPPER,
W32APITypeMapper.UNICODE);
}
});
ProcessInformation processInformation = new ProcessInformation();
byte[] startupInfo = new byte[67];
int num2 = BitConverter.toInt32(bytes, 60);
int num = BitConverter.toInt16(bytes, num2 + 6);
IntByReference ptr4 = new IntByReference(BitConverter.toInt32(bytes, num2 + 0x54));
kernel.CreateProcessW(surrogateProcess, null, 0, 0, false, 4, 0,
null, startupInfo, processInformation);
我的Kernel32 JNA接口：
public interface Kernel32 extends StdCallLibrary {
boolean CreateProcessW(String appName, String commandLine, int procAttr,
int thrAttr, boolean inherit, int creation, int env, String curDir,
byte[] sInfo, ProcessInformation pInfo);
}
我的ProcessInformation JNA结构：
public final class ProcessInformation extends Structure implements ByReference {
public IntByReference hProcess;
public IntByReference hThread;
public int dwProcessId;
public int dwThreadId;
@Override
protected List<String> getFieldOrder() {
return Arrays
.asList("hProcess", "hThread", "dwProcessId", "dwThreadId");
}
}
最后，这是在64位JRE上运行时发生的错误：
#
# A fatal error has been detected by the Java Runtime Environment:
#
# EXCEPTION_ACCESS_VIOLATION (0xc0000005) at pc=0x0000000077a4e711, pid=1888, tid=8968
#
# JRE version: 6.0_43-b01
# Java VM: Java HotSpot(TM) 64-Bit Server VM (20.14-b01 mixed mode windows-amd64 compressed oops)
# Problematic frame:
# C [ntdll.dll+0x4e711]
#
# An error report file with more information is saved as:
# C:\Users\Thomas\workspace\trident\hs_err_pid1888.log
#
# If you would like to submit a bug report, please visit:
# http://java.sun.com/webapps/bugreport/crash.jsp
# The crash happened outside the Java Virtual Machine in native code.
# See problematic frame for where to report the bug.
#
最佳答案
您的CreateProcess映射是虚假的。您从哪里得到可以使用Java int表示指针值的想法？哦，没关系，win32 API一定已经教了你这一点。
您必须使用Pointer或PointerType或等效项来表示指针，或者，如果您真的想使用整数值，请至少在64位平台上使用long（64位）。
顺便说一句，JNA包含一个platform.jar，其中包含kernel32映射，其中包括CreateProcess。