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1. 发明授权

US08572606B1 System and method for avoiding synchronization bugs through virtualization 有权
标题翻译：通过虚拟化避免同步错误的系统和方法
公开(公告)号：US08572606B1
公开(公告)日：2013-10-29
申请号：US11365012
申请日：2006-03-01
申请人： Ole Agesen , Michael Cohen , Jeffrey W. Sheldon
发明人： Ole Agesen , Michael Cohen , Jeffrey W. Sheldon
IPC分类号： G06F9/455
CPC分类号： G06F11/1402 , G06F9/45516 , G06F11/004 , G06F2201/815 , G06F2201/82
摘要： A system and method for reducing the likelihood of concurrency errors by identifying vulnerable segments of computer code and stalling other virtual machine threads of execution. According to one embodiment of the present invention, the vulnerable segment is identified at runtime, for example in a dynamic translator. According to another embodiment of the present invention, the vulnerable segment is identified ahead of time, for example in a static translator. According to yet another embodiment of the present invention, the vulnerable segment is identified in the binary translator of a virtual machine monitor.
摘要翻译：通过识别计算机代码的易受攻击的部分并拖延执行其他虚拟机线程来减少并发错误的可能性的系统和方法。根据本发明的一个实施例，在运行时识别易受攻击的段，例如在动态翻译器中。根据本发明的另一个实施例，提前识别易受攻击的段，例如在静态转换器中。根据本发明的另一个实施例，在虚拟机监视器的二进制转换器中识别易受攻击的段。

2. 发明授权

US07487313B1 Restricting memory access to protect data when sharing a common address space 有权
公开(公告)号：US07487313B1
公开(公告)日：2009-02-03
申请号：US11865635
申请日：2007-10-01
申请人： Ole Agesen , Jeffrey W. Sheldon
发明人： Ole Agesen , Jeffrey W. Sheldon
IPC分类号： G06F12/00
CPC分类号： G06F12/1036 , G06F12/1475 , G06F2212/656
摘要： A first software entity occupies a portion of a linear address space of a second software entity and prevents the second software entity from accessing the memory of the first software entity. For example, in one embodiment of the invention, the first software entity is a virtual machine monitor (VMM), which supports a virtual machine (VM), the second software entity. The VMM sometimes directly executes guest instructions from the VM and, at other times, the VMM executes binary translated instructions derived from guest instructions. When executing binary translated instructions, the VMM uses memory segmentation to protect its memory. When directly executing guest instructions, the VMM may use either memory segmentation or a memory paging mechanism to protect its memory. When the memory paging mechanism is active during direct execution, the protection from the memory segmentation mechanism may be selectively deactivated to improve the efficiency of the virtual computer system.

3. 发明授权

US07277998B1 Restricting memory access to protect data when sharing a common address space 有权
标题翻译：限制内存访问以在共享公共地址空间时保护数据
公开(公告)号：US07277998B1
公开(公告)日：2007-10-02
申请号：US10917732
申请日：2004-08-12
申请人： Ole Agesen , Jeffrey W. Sheldon
发明人： Ole Agesen , Jeffrey W. Sheldon
IPC分类号： G06F12/00
CPC分类号： G06F12/1036 , G06F12/1475 , G06F2212/656
摘要： A first software entity occupies a portion of a linear address space of a second software entity and prevents the second software entity from accessing the memory of the first software entity. For example, in one embodiment of the invention, the first software entity is a virtual machine monitor (VMM), which supports a virtual machine (VM), the second software entity. The VMM sometimes directly executes guest instructions from the VM and, at other times, the VMM executes binary translated instructions derived from guest instructions. When executing binary translated instructions, the VMM uses memory segmentation to protect its memory. When directly executing guest instructions, the VMM may use either memory segmentation or a memory paging mechanism to protect its memory. When the memory paging mechanism is active during direct execution, the protection from the memory segmentation mechanism may be selectively deactivated to improve the efficiency of the virtual computer system.
摘要翻译：第一软件实体占用第二软件实体的线性地址空间的一部分，并且防止第二软件实体访问第一软件实体的存储器。例如，在本发明的一个实施例中，第一软件实体是支持虚拟机（VM）的第二软件实体的虚拟机监视器（VMM）。 VMM有时直接从VM执行访客指令，而在其他时候，VMM执行从访客指令导出的二进制翻译指令。当执行二进制转换指令时，VMM使用存储器分段来保护其内存。当直接执行访客指令时，VMM可以使用存储器分段或存储器寻呼机制来保护其存储器。当存储器分页机制在直接执行期间有效时，可以选择性地停止对存储器分段机制的保护，以提高虚拟计算机系统的效率。

4. 发明授权

US08316193B2 Optimizing segment access in binary translation 有权
标题翻译：优化二进制翻译中的段访问
公开(公告)号：US08316193B2
公开(公告)日：2012-11-20
申请号：US12629682
申请日：2009-12-02
申请人： Ross Charles Knippel , Jeffrey W. Sheldon , Ole Agesen
发明人： Ross Charles Knippel , Jeffrey W. Sheldon , Ole Agesen
IPC分类号： G06F12/00
CPC分类号： G06F9/45516 , G06F9/45558 , G06F2009/45583
摘要： A mechanism for a binary translator to emit code that will pre-generate information about a memory segment when a segment selector is assigned to a segment register. The binary translator emits code that will be executed when a memory access using that segment register is encountered and the emitted code will access the pre-generated information when evaluating the memory access request. Memory accesses, where a number of bytes being accessed is less than or equal to a predetermined value, are validated with a number of steps in the code emitted by the binary translator.
摘要翻译：一种二进制转换器发出代码的机制，当段选择器被分配给段寄存器时，该代码将预先生成关于存储器段的信息。二进制翻译器发出将在遇到使用该段寄存器的存储器访问时执行的代码，并且当评估存储器访问请求时，发出的代码将访问预生成的信息。存储器访问（其中访问的字节数小于或等于预定值）通过二进制翻译器发出的代码中的多个步骤来验证。

5. 发明授权

US07506122B1 Restricting memory access to protect data when sharing a common address space 有权
标题翻译：限制内存访问以在共享公共地址空间时保护数据
公开(公告)号：US07506122B1
公开(公告)日：2009-03-17
申请号：US11865641
申请日：2007-10-01
申请人： Ole Agesen , Jeffrey W. Sheldon
发明人： Ole Agesen , Jeffrey W. Sheldon
IPC分类号： G06F12/00
CPC分类号： G06F12/1458 , G06F12/1036 , G06F12/109 , G06F12/145 , G06F2212/656
摘要： A first software entity occupies a portion of a linear address space of a second software entity and prevents the second software entity from accessing the memory of the first software entity. For example, in one embodiment of the invention, the first software entity is a virtual machine monitor (VMM), which supports a virtual machine (VM), the second software entity. The VMM sometimes directly executes guest instructions from the VM and, at other times, the VMM executes binary translated instructions derived from guest instructions. When executing binary translated instructions, the VMM uses memory segmentation to protect its memory. When directly executing guest instructions, the VMM may use either memory segmentation or a memory paging mechanism to protect its memory. When the memory paging mechanism is active during direct execution, the protection from the memory segmentation mechanism may be selectively deactivated to improve the efficiency of the virtual computer system.
摘要翻译：第一软件实体占用第二软件实体的线性地址空间的一部分，并且防止第二软件实体访问第一软件实体的存储器。例如，在本发明的一个实施例中，第一软件实体是支持虚拟机（VM）的第二软件实体的虚拟机监视器（VMM）。 VMM有时直接从VM执行访客指令，而在其他时候，VMM执行从访客指令导出的二进制翻译指令。当执行二进制转换指令时，VMM使用存储器分段来保护其内存。当直接执行访客指令时，VMM可以使用存储器分段或存储器寻呼机制来保护其存储器。当存储器分页机制在直接执行期间有效时，可以选择性地停止对存储器分段机制的保护，以提高虚拟计算机系统的效率。

6. 发明授权

US07487314B1 Restricting memory access to protect data when sharing a common address space 有权
公开(公告)号：US07487314B1
公开(公告)日：2009-02-03
申请号：US11865658
申请日：2007-10-01
申请人： Ole Agesen , Jeffrey W. Sheldon
发明人： Ole Agesen , Jeffrey W. Sheldon
IPC分类号： G06F12/00
CPC分类号： G06F12/1027 , G06F12/1475 , G06F2212/656
摘要： A first software entity occupies a portion of a linear address space of a second software entity and prevents the second software entity from accessing the memory of the first software entity. For example, in one embodiment of the invention, the first software entity is a virtual machine monitor (VMM), which supports a virtual machine (VM), the second software entity. The VMM sometimes directly executes guest instructions from the VM and, at other times, the VMM executes binary translated instructions derived from guest instructions. When executing binary translated instructions, the VMM uses memory segmentation to protect its memory. When directly executing guest instructions, the VMM may use either memory segmentation or a memory paging mechanism to protect its memory. When the memory paging mechanism is active during direct execution, the protection from the memory segmentation mechanism may be selectively deactivated to improve the efficiency of the virtual computer system.

7. 发明授权

US07281102B1 Restricting memory access to protect data when sharing a common address space 有权
公开(公告)号：US07281102B1
公开(公告)日：2007-10-09
申请号：US10917713
申请日：2004-08-12
申请人： Ole Agesen , Jeffrey W. Sheldon
发明人： Ole Agesen , Jeffrey W. Sheldon
IPC分类号： G06F12/00
CPC分类号： G06F12/1458 , G06F12/1036 , G06F12/109 , G06F12/145 , G06F2212/656
摘要： A first software entity occupies a portion of a linear address space of a second software entity and prevents the second software entity from accessing the memory of the first software entity. For example, in one embodiment of the invention, the first software entity is a virtual machine monitor (VMM), which supports a virtual machine (VM), the second software entity. The VMM sometimes directly executes guest instructions from the VM and, at other times, the VMM executes binary translated instructions derived from guest instructions. When executing binary translated instructions, the VMM uses memory segmentation to protect its memory. When directly executing guest instructions, the VMM may use either memory segmentation or a memory paging mechanism to protect its memory. When the memory paging mechanism is active during direct execution, the protection from the memory segmentation mechanism may be selectively deactivated to improve the efficiency of the virtual computer system.

8. 发明授权

US07277999B1 Restricting memory access to protect data when sharing a common address space 有权
公开(公告)号：US07277999B1
公开(公告)日：2007-10-02
申请号：US10918044
申请日：2004-08-12
申请人： Ole Agesen , Jeffrey W. Sheldon
发明人： Ole Agesen , Jeffrey W. Sheldon
IPC分类号： G06F12/00
CPC分类号： G06F12/1027 , G06F12/1475 , G06F2212/656
摘要： A first software entity occupies a portion of a linear address space of a second software entity and prevents the second software entity from accessing the memory of the first software entity. For example, in one embodiment of the invention, the first software entity is a virtual machine monitor (VMM), which supports a virtual machine (VM), the second software entity. The VMM sometimes directly executes guest instructions from the VM and, at other times, the VMM executes binary translated instructions derived from guest instructions. When executing binary translated instructions, the VMM uses memory segmentation to protect its memory. When directly executing guest instructions, the VMM may use either memory segmentation or a memory paging mechanism to protect its memory. When the memory paging mechanism is active during direct execution, the protection from the memory segmentation mechanism may be selectively deactivated to improve the efficiency of the virtual computer system.

9. 发明授权

US08561061B2 Adaptive dynamic selection and application of multiple virtualization techniques 有权
标题翻译：自适应动态选择和应用多种虚拟化技术
公开(公告)号：US08561061B2
公开(公告)日：2013-10-15
申请号：US12152517
申请日：2008-05-14
申请人： Keith M. Adams , Jeffrey W. Sheldon , Vyacheslav V. Malyugin
发明人： Keith M. Adams , Jeffrey W. Sheldon , Vyacheslav V. Malyugin
IPC分类号： G06F9/455
CPC分类号： G06F9/45558 , G06F9/45533 , G06F2009/45566 , G06F2009/45583 , G06F2009/45591
摘要： Autonomous selection between multiple virtualization techniques implemented in a virtualization layer of a virtualized computer system. The virtual machine monitor implements multiple virtualization support processors that each provide for the comprehensive handling of potential virtualization exceptions. A virtual machine monitor resident virtualization selection control is operable to select between use of first and second virtualization support processors dependent on identifying a predetermined pattern of temporally local privilege dependent instructions within a portion of an instruction stream as encountered in the execution of a guest operating system.
摘要翻译：在虚拟化计算机系统的虚拟化层中实现的多个虚拟化技术之间的自主选择。虚拟机监视器实现多个虚拟化支持处理器，每个虚拟化支持处理器都可以全面处理潜在的虚拟化异常。虚拟机监视器驻留虚拟化选择控制可操作以在使用第一和第二虚拟化支持处理器之间进行选择，这取决于在客户机操作系统的执行中遇到的指令流的一部分内识别时间上依赖于本地特权依赖指令的预定模式。

10. 发明授权

US08832682B2 Trace collection for a virtual machine 有权
标题翻译：虚拟机的跟踪收集
公开(公告)号：US08832682B2
公开(公告)日：2014-09-09
申请号：US12058545
申请日：2008-03-28
申请人： Min Xu , Vyacheslav V. Malyugin , Jeffrey W. Sheldon , Ganesh Venkitachalam , Boris Weissman
发明人： Min Xu , Vyacheslav V. Malyugin , Jeffrey W. Sheldon , Ganesh Venkitachalam , Boris Weissman
IPC分类号： G06F9/455
CPC分类号： G06F9/45533 , G06F9/45558 , G06F2009/45591
摘要： One embodiment is a computer-implemented method of trace collection for a virtual machine that includes: executing a sequence of instructions from an initial state of the virtual machine; accessing an event log of data relating to nondeterministic events, which data includes an execution point; making at least a portion of the data available to the virtual machine when the sequence reaches the execution point; collecting trace information in response to expansion parameters; and storing the trace information in a trace file.
摘要翻译：一个实施例是用于虚拟机的跟踪收集的计算机实现的方法，包括：从虚拟机的初始状态执行指令序列; 访问与非确定性事件有关的数据的事件日志，所述数据包括执行点; 当所述序列到达所述执行点时，使所述数据的至少一部分可用于所述虚拟机; 根据扩展参数收集跟踪信息; 并将跟踪信息存储在跟踪文件中。

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