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Memory Leak
In computer science, a memory leak is a type of resource leak that occurs when a computer program incorrectly manages memory allocations in a way that Computer memory, memory which is no longer needed is not released. A memory leak may also happen when an object (computer science), object is stored in memory but cannot be accessed by the running code (i.e. unreachable memory). A memory leak has symptoms similar to a number of other problems and generally can only be diagnosed by a programmer with access to the program's source code. A related concept is the "space leak", which is when a program consumes excessive memory but does eventually release it. Because they can exhaust available system memory as an application runs, memory leaks are often the cause of or a contributing factor to software aging. Consequences A memory leak reduces the performance of the computer by reducing the amount of available memory. Eventually, in the worst case, too much of the available memory may b ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Computer Science
Computer science is the study of computation, automation, and information. Computer science spans theoretical disciplines (such as algorithms, theory of computation, information theory, and automation) to Applied science, practical disciplines (including the design and implementation of Computer architecture, hardware and Computer programming, software). Computer science is generally considered an area of research, academic research and distinct from computer programming. Algorithms and data structures are central to computer science. The theory of computation concerns abstract models of computation and general classes of computational problem, problems that can be solved using them. The fields of cryptography and computer security involve studying the means for secure communication and for preventing Vulnerability (computing), security vulnerabilities. Computer graphics (computer science), Computer graphics and computational geometry address the generation of images. Progr ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
C (programming Language)
C (''pronounced like the letter c'') is a General-purpose language, general-purpose computer programming language. It was created in the 1970s by Dennis Ritchie, and remains very widely used and influential. By design, C's features cleanly reflect the capabilities of the targeted CPUs. It has found lasting use in operating systems, device drivers, protocol stacks, though decreasingly for application software. C is commonly used on computer architectures that range from the largest supercomputers to the smallest microcontrollers and embedded systems. A successor to the programming language B (programming language), B, C was originally developed at Bell Labs by Ritchie between 1972 and 1973 to construct utilities running on Unix. It was applied to re-implementing the kernel of the Unix operating system. During the 1980s, C gradually gained popularity. It has become one of the measuring programming language popularity, most widely used programming languages, with C compilers avail ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Memwatch
Memwatch is a free programming tool for memory leak detection in C, released under the GNU General Public License. It is designed to compile and run on any system which has an ANSI C compiler. While it is primarily intended to detect and diagnose memory leaks, it can also be used to analyze a program's memory usage from its provided logging facilities. Memwatch differs from most debugging software because it is compiled directly into the program which will be debugged, instead of being compiled separately and loaded into the program at runtime. See also *Memory management *Memory debugger Memory is the faculty of the mind by which data or information is encoded, stored, and retrieved when needed. It is the retention of information over time for the purpose of influencing future action. If past events could not be remembered, ... External links Memwatch home page Free memory management software {{programming-software-stub ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
DynamoRIO
DynamoRIO is a BSD licensed dynamic binary instrumentation framework for the development of dynamic program analysis tools. DynamoRIO targets user space applications under the Android, Linux, and Windows operating systems running on the AArch32, IA-32, and x86-64 instruction set architectures. DynamoRIO was originally created as a dynamic binary optimization system but has since been used for security, debugging, and analysis tools. DynamoRIO originated in a collaboration between Hewlett-Packard's Dynamo optimization system and the Runtime Introspection and Optimization (RIO) research group at MIT; hence the combined name "DynamoRIO". It was first released publicly as a proprietary binary toolkit in June 2002 and was later open-sourced with a BSD license in January 2009. Overview DynamoRIO is a process virtual machine that redirects a program's execution from its original binary code to a copy of that code. Instrumentation that carries out the actions of the desired tool are t ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Insure++
Insure++ is a memory debugger computer program, used by software developers to detect various errors in programs written in C and C++. It is made by Parasoft, and is functionally similar to other memory debuggers, such as Purify, Valgrind and Dr Memory. Overview Insure++ can automatically find erroneous accesses to freed memory (use-after-free situations), array-bounds violations, freeing unallocated memory (which often happens when a programmer frees the same memory twice, or when he frees global or stack memory), and many others. Unlike Purify and Valgrind, Insure++ inserts its instrumentation at the source-code level, which allows it to detect errors that the other tools miss. In particular, Insure++ can detect buffer overflows in automatic arrays, and overflows which involve pointers that accidentally "jump" from one valid memory region to another, as in the following example: #include int main() The source-level instrumentation allows it to not only identify that a ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Parasoft
Parasoft (officially Parasoft Corporation) is an independent software vendor specializing in automated software testing and application security with headquarters in Monrovia, California. It was founded in 1987 by four graduates of the California Institute of Technology who planned to commercialize the parallel computing software tools they had been working on for the Caltech Cosmic Cube, which was the first working hypercube computer built. During the 90's, Parasoft leveraged technology in their parallel software toolkit to create software test automation tools for traditional software development as well as parallel. Starting with runtime error detection for C and C++ with their Insure++ product, they also added capabilities for static code analysis, unit testing, and ultimately expanded to include application security, functional testing, and service virtualization. Technologies Parasoft develops automated defect prevention technologies that support the Automated Defect Pre ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Valgrind
Valgrind () is a programming tool for memory debugging, memory leak detection, and profiling. Valgrind was originally designed to be a free memory debugging tool for Linux on x86, but has since evolved to become a generic framework for creating dynamic analysis tools such as checkers and profilers. Overview Valgrind is in essence a virtual machine using just-in-time compilation techniques, including dynamic recompilation. Nothing from the original program ever gets run directly on the host processor. Instead, Valgrind first translates the program into a temporary, simpler form called intermediate representation (IR), which is a processor-neutral, static single assignment form-based form. After the conversion, a tool (see below) is free to do whatever transformations it would like on the IR, before Valgrind translates the IR back into machine code and lets the host processor run it. Valgrind recompiles binary code to run on host and target (or simulated) CPUs of the same archit ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
IBM Rational Purify
PurifyPlus is a memory debugger program used by software developers to detect memory access errors in programs, especially those written in C or C++. It was originally written by Reed Hastings of Pure Software. by Reed Hastings and Bob Joyce, Usenix Winter 1992 technical conference. Pure Software later merged with Atria Software to form Pure Atria Software, which in turn was later acquired by , which in turn was acquired by IBM, and then divested to |
BoundsChecker
BoundsChecker is a memory checking and API call validation tool used for C++ software development with Microsoft Visual C++. It was created by NuMega in the early 1990s. When NuMega was purchased by Compuware in 1997, BoundsChecker became part of a larger tool suite, DevPartner Studio. Micro Focus purchased the product line from Compuware in 2009. Comparable tools include Purify, Insure++ and Valgrind. BoundsChecker may be run in two distinct modes: ActiveCheck, which will work against any application as is, or FinalCheck, which makes use of instrumentation added to the application when it is built. ActiveCheck performs a less intrusive analysis and monitors all calls by the application to the C Runtime Library, Windows API and calls to COM objects. By monitoring memory allocations and releases, it can detect memory leaks and overruns. Monitoring API and COM calls enables ActiveCheck to check parameters, returns and exceptions and report exceptions when they occur. Thread dea ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Programming Tool
A programming tool or software development tool is a computer program that software developers use to create, debug, maintain, or otherwise support other programs and applications. The term usually refers to relatively simple programs, that can be combined to accomplish a task, much as one might use multiple hands to fix a physical object. The most basic tools are a source code editor and a compiler or interpreter, which are used ubiquitously and continuously. Other tools are used more or less depending on the language, development methodology, and individual engineer, often used for a discrete task, like a debugger or profiler. Tools may be discrete programs, executed separately – often from the command line – or may be parts of a single large program, called an integrated development environment (IDE). In many cases, particularly for simpler use, simple ad hoc techniques are used instead of a tool, such as print debugging instead of using a debugger, manual timing (of overal ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Debugging
In computer programming and software development, debugging is the process of finding and resolving '' bugs'' (defects or problems that prevent correct operation) within computer programs, software, or systems. Debugging tactics can involve interactive debugging, control flow analysis, unit testing, integration testing, log file analysis, monitoring at the application or system level, memory dumps, and profiling. Many programming languages and software development tools also offer programs to aid in debugging, known as ''debuggers''. Etymology The terms "bug" and "debugging" are popularly attributed to Admiral Grace Hopper in the 1940s. While she was working on a Mark II computer at Harvard University, her associates discovered a moth stuck in a relay and thereby impeding operation, whereupon she remarked that they were "debugging" the system. However, the term "bug", in the sense of "technical error", dates back at least to 1878 and Thomas Edison who describes the "litt ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
