6. Tools

6.1. GNU 프로젝트 디버거(GDB)

GNU 프로젝트 디버거(GDB로 일반적으로 알려져 있는)는 C, C++ 그리고 다른 언어로 작성된 프로그램을 제어가 된 환경내에서 수행하며, 그 데이터를 출력하면서 디버깅할 수 있습니다.

Red Hat Enterprise Linux 5.5에서 GDB는 7.0.1버전으로 업데이트 되었습니다. 자세한 변경 사항은 테크니컬 노트의 GDB 부분에서 확인하십시오.

향상된 C++ 지원

GDB의 C++ 프로그래밍 언어에 대한 지원이 향상되었습니다. 중요한 사항은 다음을 포함합니다:

수식 구문 분석의 향상
타입 이름을 더 잘 다루게 됨
부가적인 따옴표의 사용의 필요성이 거의 제거됨
"next" and other stepping commands work properly even when the inferior throws an exception.
GDB has a new "catch syscall" command. This can be used to stop the inferior whenever it makes a system call.

와이드캐릭터와 멀티바이트 문자 지원

이제 GDB는 타겟의 와이드캐릭터와 멀티바이트 문자를 지원합니다.

독립 쓰레드 디버깅

Thread execution now permits debugging threads individually and independently of each other; enabled by new settings "set target-async" and "set non-stop".

6.2. SystemTap

SystemTap is a tracing and probing tool that allows users to study and monitor the activities of the operating system (particularly, the kernel) in fine detail. It provides information similar to the output of tools like netstat, ps, top, and iostat; however, SystemTap is designed to provide more filtering and analysis options for collected information.

New Kernel Tracepoints

Tracepoints are placed in important sections of the kernel, allowing system administrators to analyze the performance of, and debug portions of code. In Red Hat Enterprise Linux 5.5, a wide range of tracepoints have been added to the kernel (BZ#475710), including tracepoints for networking (BZ#475457), coredump (BZ#517115) and signal (BZ#517121).

참고

A list of tracepoints available in the kernel can be obtained with:

stap -L 'kernel.trace("*")'|sort

Unprivileged mode

Previously, only users with root privileges were able to use SystemTap. This update introduces SystemTap's unprivileged mode, allowing non-root users to still use SystemTap. Detailed information on unprivileged man stap-client manpage.

중요

Unprivileged mode is considered a Technology Preview in the Red Hat Enterprise Linux 5.5. The stap-server facility on which it relies is undergoing work for security improvements and should be deployed with care on a trustworthy network.

C++ Probing

The C++ program probing improvements also allows better probing of user-space programs.

6.3. Valgrind

Valgrind is used to monitor memory read, write, and allocation operations. The valgrind tool is frequently used by developers to diagnose and debug memory management problems.

Valgrind has been updated to version 3.5.0, providing enhanced support for a wide range of system architectures. This update introduces many improvements to performance, scalability and usability of the Valgrind. Notably, the usability and scalability of the Helgrind tool — which is used to detect race contiditions — has been improved. The leak checking capabilities of the Memcheck tool are also improved. Additionally, support for DWARF debugging information has been enhanced.

6. Tools

6.1. GNU 프로젝트 디버거(GDB)

6.2. SystemTap

6.3. Valgrind

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