Question

我正在尝试从我创建的JNA界面中调用 system32 的 CreateProcessW 。问题是，当我从32位JRE运行软件时，它工作正常，但当我转移到64位JRE时，它会崩溃JVM。

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界面：

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，这是我在64位JRE上运行时出现的错误：

#
# 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.
#

Answer 1

您的CreateProcess映射是假的。你在哪里得到的想法可以使用Java int来表示指针值？哦，没关系，win32 API一定教过你。

您必须使用Pointer或PointerType或等效代码来表示指针，或者如果您真的坚持使用整数值，至少使用{{1} 64位平台上的（64位）。

BTW，JNA包含long，其中包含kernel32映射，包括platform.jar。

JNA调用适用于32位JRE，但不适用于64位JRE

1 个答案: