gprof

/delete are captured. Therefore, it can detect the following problems:1. Use of uninitialized memory;2. Read/write the memory block after release;3. Read/write memory blocks that exceed malloc allocations;4. Read/write inappropriate memory blocks in the stack;5. Memory leaks, pointers to a piece of memory are lost forever;6. Incorrect malloc/free or new/delete matching;The DST and src pointers overlap in the 7,memcpy () correlation function.These problems are often the most vexing problem for C

the following problems:1. Use of uninitialized memory;2. Read/write the memory block after release;3. Read/write memory blocks that exceed malloc allocations;4. Read/write inappropriate memory blocks in the stack;5. Memory leaks, pointers to a piece of memory are lost forever;6. Incorrect malloc/free or new/delete matching;The DST and src pointers overlap in the 7,memcpy () correlation function.These problems are often the most vexing problem for C + + programmers, and Memcheck is very helpful

GNU assembler (gas) GNU assembler (called gas) is the most popular assembler in UNIX environments. Unlike most other development software packages, the GNU assembler is not released in a separate package. It is bundled with other development software in the GNU binutils package. The binutils package contains the following programs: Addr2line converts an address to a file name and a row number. Create, modify, and expand an AR File Archive As assemble the assembly language code into the target co

The GCC compiler is usually followed by some options and file names. The basic usage of the GCC command is as follows: GCC [Options] [filenames] Option specifies how the compiler is compiled. GCC options GCC has 100 compilation options. Many of these options may never be used, but some of the main options are often used. Many gcc The options include more than one character, so you must specify the respective characters for each option. For example, the following two commands are different: Gcc-p

malloc allocation; Memory blocks in the stack that are not suitable for reading/writing; Memory leakage: the pointer pointing to a piece of memory is always lost; Incorrect malloc/free or new/delete match; The dst and src pointers in the memcpy () related functions overlap. 2. Callgrind It is similar to gprof, but it is more subtle in program running observation, which can provide us with more information. Unlike

GNU binutils is a set of binary tools. Binutils is one of the GNU tools, including connectors, compilers, and other tools for target files and archives. It is a tool for processing and maintaining binary code. Including addr2line ar GPROF nm objcopy objdump ranlib size strings strip. Ar is used to create, modify, and extract archive files) Objcopy can convert a target file in one format to a target file in another format. The file command is used to d

04 24 02 20 40 00 movl $0x402002, (% ESP)401089: E8 F2 00 00 00 call 401180 It can be seen that main () calls fopen (). Codeviz provides the ability to analyze the target file. Dynamic analysis records the call of the function while the program is running, and then organizes it into a call diagram. Compared with static analysis, it can obtain more information, such as the order and number of function calls. However, it also has some disadvantages, for example, some branches of statements in th

@ Ubuntu:/home/Embedded/build-tools/build-binutils # ../binutils-2.21.1/configure -- target = $ target -- prefix = $ prefix Root @ Ubuntu:/home/Embedded/build-tools/build-binutils # Make Root @ Ubuntu:/home/Embedded/build-tools/build-binutils # make install After that, check the generated Tool in $ prefix. Instance: Root @ Ubuntu:/home/Embedded/build-tools/build-binutils # cd/home/Embedded/tools/bin Root @ Ubuntu:/home/Embedded/tools/bin # ll Total usage 49988 Drwxr-XR-x 2 root Root 4096 ./ Drw

environments such as CDE, Kde, and gnome run on them. 2 2) xbmc uses OpenGL RenderingXbmc uses the OpenGL rendering library to complete many special effects. 3) xbmc uses the vdpau decoder LibraryVdpau (video decode and presentation API for UNIX) is a GPU developed by NVIDIA for its g9x and later series, APIs in UNIX and Unix-like systems (including Linux, FreeBSD, and Solaris ). Vdpau can decode the video from the video player to the GPU for hard decoding. Currently, vdpau can process MPEG-1,

transfer, and so on to track function library calls of running processes. Dtrace/ftrace: The combination of the two tools mentioned above. DTrace is a tracing tool whichruns in the system level-this means you can trace all processes to and out of the Kerne l, rather than selecting a single process to trace. Blktrace: Block I/O event tracer PT-PMP:is a poor mans ' profiler, inspired by http://poormansprofiler.org. It can create and summarize full stack traces of processes on Linux. Summaries of

release3) read/write memory blocks that exceed malloc allocations4) Read/write inappropriate memory blocks in the stack5) memory leak, pointer to a piece of memory forever lost6) incorrect malloc/free or New/delete match7) overlap of DST and src pointers in memcpy correlation functions2.Callgrindand Gprof similar analysis tools, but it to the operation of the program observation more nuanced, can provide us with more information. Unlike

course, there are editor vim+cscope+ctags, as well as gprof, Gcov and so on.scripting languageLearn one or two scripting languages, for the usual study and work will play a multiplier effect.For example, to deal with some data, you can use SED, awk plus gnuplot, this time shell programming is very important. As for the shell, I have written a "shell programming paradigm sequence" that has been published as an open source Book Pleac-shell project.For

Reprinted from: http://velep.com/archives/973.htmlThe run time of a statistical function or a piece of code is often encountered in software development. The running time can be used to analyze the operation efficiency and performance of the function or program segment to optimize the code accordingly.In a UNIX environment, you often use the Gprof tool in the Binutils (GNU Binary toolset) to see the function run time. But the focus of this article is

start making it!!3. Create a binary tool (Binutils)Binutils is one of the GNU tools that includes connectors, assemblers, and other tools for target files and archives, which are binary code processing and maintenance tools. The installation Binutils tool contains programs such as Addr2line, AR, as, c++filt, gprof, LD, NM, objcopy, Objdump, Ranlib, readelf, size, strings, strip, Libiberty, LIBBFD and Libopcodes. The use of these tools is not introduc

[LS]ls -a #显示所有隐藏文件 (in characters '. ' beginning), including ... ls -A #显示除了 ... All hidden files except ls -l #列出详细的信息 ls -i #打印i节点号, equivalent to LS--inode[Man]Mans 1#标准命令Mans 2#系统调用Mans 3#库函数Mans 4#设备说明Mans 5#文件格式Mans 6#游戏和娱乐Mans 7#杂项Mans 8#管理员命令[GCC]gcc -E #只预处理, do not compile gcc -S #编译, do not assemble gcc -c #编译和汇编, do not link gcc-o #指定输出文件 gcc -olevel #指定level级别的优化 gcc -G #编译之后

--leak-check=yes./test (4) Performance test GCC Test.c-pg-o Test ./test Gprof Test Gmon.out-p (5) unit test cunit-2-0-1 Aclocal Autoconf Autoheader chmod u+x Configure Libtoolize Automake--add-missing ./configure Make Because there is a test_cunit code in Cunit-2-0-1, you can look directly at how the unit tests are run and tested.The above tools are a few tools under Linux testing

program perform faster in most cases. The-O2 option tells GCC to produce as little and as fast code as possible. The-O2 option will make compilation slower than when using-O. Often, however, the resulting code executes more quickly. GCC supports a number of debugging and profiling options. The G-and-PG options are most commonly used in these options. Option tells GCC to generate debug information that can be used by the GNU debugger to debug your program. GCC provides a feature that is not av

methods for step 5 Method One: SOURCE/ROOT/.BASHRC Or ./ETC/BASH.BASHRC Method Two: Source/etc/profile Method III: Immediate effect 7. Check to see if the path is joined to path (this step is not done, step 8 also shows successful installation) Echo $PATH Display Content/usr/local/sbin:/usr/local/bin:/usr/sbin:/usr/bin:/sbin:/bin:/usr/games:/usr/local/arm/4.4.3/bin Indicates that the path to the cross compiler has been added. At this point, the cross compilation environment installation is

Http://hi.baidu.com/wstone_h/blog/item/5916a4a910206dfb1e17a207.html Reference Literature 1:http://www.lupaworld.com/home/space-131820-do-blog-id-118756.html Reference 2:http://liupingjing.blog.ubuntu.org.cn/?p=114Tibetan Address 1:http://hi.baidu.com/wstone_h/blog/item/ed68bcb5221eb4c937d3ca35.htmlTibetan Address 2:http://hi.baidu.com/wstone_h/blog/item/cb4c72ca9c210681c8176821.html Recently to analyze some code, in win under the Souce insight to read the source code, in Linux tools on the mor

started, and can be viewed with the show collation command for optional sorting-denable_debug_sync=boolThe Sync debugging feature that is used to turn on MySQL, which is turned on by default, but only when MySQL is configured to enable debugging. This feature is enabled, it is also turned off at run time, the--DEBUG-SYNC-TIMEOUT=N option is required to start the MySQL server, the default n is 0, that is, the function is disabled, and if n is greater than 0, synchronous debugging will wait for n