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The LDD and NM described in this article are two useful tools for analyzing programs under Linux. LDD is a tool used to analyze the dynamic libraries that a program needs to rely on when it runs; nm is a tool for viewing the contents of a symbol table in a specified program. Here are some examples of these two tools:1. LDD, look at the following example, using LDD to see the dynamic library on which CS prog

When there are frequently used modules in our program and such modules are also used in other programs, we should generate libraries based on the idea of software reuse, so that later programming can reduce the amount of development code. Here we will introduce the two commands AR and Nm for database operations. 1. Basic ar usage2. Basic usage commands of Nm When there are frequently used modules in our pro

Use of AR and NM commands When there are frequently used modules in our program and such modules are also used in other programs, we should generate libraries based on the idea of software reuse so that later programming can reduce R DCodeQuantity. Here we will introduce the two commands AR and Nm for database operations. By wing, source: only_you When there are frequently used modules in our program

. So is written for the PHP script call, if the PHP script execution is broken,. So can only be in the process of grief and finally, PHP script debugging often used Echo, Print_r, var_dump are not useful. Even if you can print a little error log out, but also saw the appearance, do not know the inside, can not solve some strange bugs. Fortunately we have GDB, the following 4 steps to fix PHP C extension debugging.If Test-z "$PHP _debug"; ThenAc_arg_enable (Debug,[--enable-debug compile with debu

NM command[In the content provided by the gnu c language library, an interface can be used to do this. Run the following command to View Details:Nm-D/lib/libc. so.6 | grep log] The nm command is relatively simple and powerful. It is used to list various symbols in a target file. There are many types of symbols. The following are some common symbol types.

Article For reprinted and reserved. Link: http://dev.csdn.net/article/69/69405.shtm When ourProgramThere are frequently used modules, and such modules are also used in other programs. In this case, according to the idea of software reuse, we should generate libraries for them so that later programming can reduce developmentCodeQuantity. Here we will introduce the two commands AR and Nm for database operations. 1. Basic ar usage2. Basic usage

When there are frequently used modules in our program and such modules are also used in other programs, we should generate libraries based on the idea of software reuse, so that later programming can reduce the amount of development code. Here we will introduce the two commands AR and Nm for database operations. 1. Basic ar usage2. Basic usage commands of Nm When there are frequently used modules in our pro

The nm command can list the symbol tables in a function library file. It works for both static function libraries and shared function libraries. For a given function library, the NM command can list all the symbols defined in the function library, including the values and types of each symbol. You can also define the number of rows of the function (Symbol) in the original program. However, this requires tha

file in the same wayecho OPEN libyuerapi.a > Ar.mac Enterecho addlib libyucom1.a >> Ar.mac Enterecho SAVE >> Ar.mac Enterecho END >> Ar.mac returnAr-m Two specific instructionsWhen our program has frequently used modules, and this module is also used in other programs, at this time according to the idea of software reuse, we should create libraries, so that later programming can reduce the amount of development code. Here are two commands ar and NM,

Excerpted from http://blog.csdn.net/solmyr_biti/article/details/6565479The NM command introduces many, but mostly does not describe the meaning of its function symbol flags.Most recently used in debugging a dynamic library, which uses the most:Nm-a * |grep "AAA" | C++filt//-A in order to display the file, C++filt converted to a readable style, as if there is a parameter to achieve similar functionsOther content is organized as follows (unknown to the

addresses the problem of function entry redirection. The main function is to put all the object files into a package, generate an export symbol table, so that other programs can know the structure of this file.For the Apple system, the rich device contains a variety of architecture platforms, ARMV7, Arm64, i386, x86_64 is the most common instruction set, a library in order to be compatible with each platform, often to the different platform compiled programs, to generate so-called fat files (FA

When there are frequently used modules in our program and such modules are also used in other programs, we should generate libraries based on the idea of software reuse, so that later programming can reduce the amount of development code. Here we will introduce the two commands AR and Nm for database operations. 1. Basic ar usage The ar command can be used to create and modify a database, or to propose a single module from the database. The library i

Linux program analysis tools: ldd and nm Ldd and nm are two very practical program analysis tools in Linux. Among them, ldd is used to analyze the dynamic link library that the program depends on when running, and nm is used to view the symbol table information in the specified program.1 ldd Format: ldd [options] file Function: lists the shared libraries required

From: http://blog.csdn.net/longxin007/article/details/1880477 PrefaceIf common programming doesn't need to know these things, if you want to precisely control the format of your object file or you want to view the content in the object to make some judgment, just now you can look at the following tools in idea: objdump, nm, ar. Of course, this article cannot explain in detail their usage and functions. If you think this article is not clear enough, yo

Use Displays symbolic information about object files, executables, and object files libraries. Grammar NM [-A] [-c] [-x {32|64|32_64|d64| any}] [-f] [-h] [-l] [-p] [-r] [-T] [-e] [-G |-u][-D |-o |-X |-tformat] File ... Description The NM command displays information about the symbol in the specified file, which can be an object file, an executable file, or an object file library. If the file does not conta

a weak link symbol, and the other object file with the link has its definition, otherwise it is specified with a system-specific default value. Note the points: -C is always available for C + + compiled object files. Remember that there are overloads in C + +? To differentiate between overloaded functions, the C + + compiler appends information such as function return values/parameters to the function name to form a mangle symbol, which, when listed with this option, does an inver

specify a weak link symbol, and the other object file with the link has its definition, otherwise it is specified with a system-specific default value. Note the points: -C is always available for C + + compiled object files. Remember that there are overloads in C + +? To differentiate between overloaded functions, the C + + compiler appends information such as function return values/parameters to the function name to form a mangle symbol, which, when listed with this option, does

I searched for a bit, found a good blog, said very detailed: link.AnalyticalThe most primitive state transfer equation for multiple backpacks:Make c[i] = min (Num[i], j/v[i])F[I][J] = max (F[i-1][j-k*v[i]] + k*w[i]) (1 If you make a = J/v[i], B = J V[i] Then J = A * V[i] + b.Here the meaning of K is changed, k means that the number of items to take the article I is less than a few.Then f[i][j] = Max (F[i-1][b+k*v[i]]-k*w[i]) + A*w[i] (A-c[i] It can be found that f[i-1][b+k*v[i]]-k*w[i] is only r

through nm To debug a function, you need to set a breakpoint. to ensure that the function does not repeat the symbols in the c library, add the unified prefix zif before the function is exported, to know that the breakpoint is to be debugged. which symbols are available for so? the nm command is no longer suitable. The nm command is used to list the symbols of t

LDD and NM are two very useful program analysis tools under Linux. LDD is a tool used to analyze the dynamic-link library that the program runs on, and NM is the tool used to view the symbol table information in the specified program. 1 LDDFormat:ldd [options] FileFunction: Lists the shared libraries required for file runParameters:-D perform relocation and report all missing functions-R performs relo