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Application with LARGEADDRESSAWARE flag set getting less virtual memory

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问题 I have a 32 bit application consisting one exe and multiple dlls. The exe has been built with /LARGEADDRESSAWARE flag set. So I expect on a 64 bit OS I should get 4 GB of user address space. But on some 64 bit Win 7 systems I am getting only 2 GB of user address space. The physical memory is 8 GB if that matters. What could be reason for this behavior? 回答1: After browsing through MSDN, I found the following: On http://msdn.microsoft.com/en-us/library/windows/desktop/aa366770(v=vs.85).aspx

How does the 64 bit linux kernel kick off a 32 bit process from an ELF

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问题 By looking at binfmt_elf.c in the kernel source, I have not been able to figure out what the kernel (64 bit) does differently when spawning a 32 bit process vs a 64 bit process. Can anybody explain to me what I am missing? (This question is related to my other question about having 32 bit instructions in the same process as 64 bit instructions (link), but this qualifies as a separate question.) 回答1: If the execveat system call is used to start a new process, we first enter fs/exec.c in the

Calling function from 64bit app from a 32bit dll

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问题 I have a 32bit dll (no source code) that I need to access from 64bit C# application. I've read this article and took a look into the corresponding code from here. I've also read this post. I'm not sure that I'm asking the right question, so please help me. There are 3 projects: dotnetclient , x86Library and x86x64 . The x86x64 has x86LibraryProxy.cpp which loads the x86library.dll and calls the GetTemperature function: STDMETHODIMP Cx86LibraryProxy::GetTemperature(ULONG sensorId, FLOAT*

ERROR: Could not find method armeabi-v7a() for arguments [arm64-v8a]

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I tried to change my application to support 32-bit and 64-bit, but when i change the build.gradle like this. android { compileSdkVersion 28 defaultConfig { applicationId "id.co.poslogistics.agendakegiatan" minSdkVersion 15 targetSdkVersion 28 versionCode 1 versionName "1.0" ndk.abiFilters = 'armeabi-v7a' 'arm64-v8a' 'x86' 'x86_64' testInstrumentationRunner "android.support.test.runner.AndroidJUnitRunner" } buildTypes { release { minifyEnabled false proguardFiles getDefaultProguardFile('proguard-android.txt'), 'proguard-rules.pro' } } but when i gradle it, the error will show like this ERROR:

ERROR: Could not find method armeabi-v7a() for arguments [arm64-v8a]

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问题 I tried to change my application to support 32-bit and 64-bit, but when i change the build.gradle like this. android { compileSdkVersion 28 defaultConfig { applicationId "id.co.poslogistics.agendakegiatan" minSdkVersion 15 targetSdkVersion 28 versionCode 1 versionName "1.0" ndk.abiFilters = 'armeabi-v7a' 'arm64-v8a' 'x86' 'x86_64' testInstrumentationRunner "android.support.test.runner.AndroidJUnitRunner" } buildTypes { release { minifyEnabled false proguardFiles getDefaultProguardFile(

/usr/bin/ld: cannot find -lXmu

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问题 I want to install netgen and try to compile the source code. During this I got the error message: U -L/usr/lib/x86_64-linux-gnu -ltk8.6 -ltcl8.6 -lGL -lXmu -lX11 -fopenmp -Wl,-rpath -Wl,/opt/netgen/lib /usr/bin/ld: cannot find -lXmu collect2: error: ld returned 1 exit status make[2]: *** [netgen] Error 1 Maybe I have to install an additional package? Does anyone have an idea? 回答1: You can check, depending on your specific OS, if you are not missing the missing the non-versioned named (i.e.

How to detect X32 on Windows?

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问题 X32 allows one to write programs using 32-bit integers, longs and pointers that run on x86_64 processors. Using X32 has a number of benefits under certain use cases. (X32 is different than X86 or X64; see Difference between x86, x32, and x64 architectures for more details). It appears some Windows Enterprise Server supports X32, but I'm having trouble finding more information on it. That's based on some Intel PDFs, like Intel® Xeon® Processor E5-2400 Series-based Platforms for Intelligent

I want run my visual studio in 64 bit mode

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问题 I am writing my web service in .NET 3.5, in this I have to access SharePoint 2010 data, but SharePoint requires 64-bit mode for my application. Visual Studio by default in 32-bit mode. How can I run my Visual Studio 2013 in 64-bit? This is what my task manager shows: I think I need this to be 64-bit, what should I do now? 回答1: Visual Studio itself is a 32-bit application and cannot be run in "64-bit mode". However, Visual Studio can create both 32-bit and 64-bit applications and the debugger

Using IMAGE_FILE_LARGE_ADDRESS_AWARE 32bit - 64bit

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问题 I learned yesterday that in DelphiXE using the compiler directive: {$SetPEFlags IMAGE_FILE_LARGE_ADDRESS_AWARE} you can access/use 4GB address space on 64bit computers even though DelphiXE compiler produces a 32bit code. I tried today DelphiXE program on 4GB machine with Windows7 and after starting the program I really get the following result: Kbytes of physical memory: ~4.000.000KB Kbytes of free physical memory: ~3.200.000KB Percent of Memory in use: ~20% Kbytes of virtual address space:

JVM Heapsize on 32 bit OS

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问题 I am using 32 bit win.7 and using Eclipse. Also having 4GB RAM. I want to allocate my java application a maximum heapsize of around 3 GB, but I am able to allocate maximum 1.5GB through VM arguments -Xmx1056m . What should I do? If I Install a 64 bit win.7. it would be able then to allocate 3GB heapsize to my app? 回答1: A regular 32-bit Windows process can only address 2GB of memory, even if you have more memory available. You can find the memory limits for different Windows versions here.