Who invented Valgrind?
Julian Seward
Valgrind
| Original author(s) | Julian Seward |
|---|---|
| Repository | sourceware.org/git/valgrind.git |
| Operating system | Linux macOS Solaris Android |
| Type | Profiler, Memory debugger |
| License | GNU General Public License |
What is Valgrind used for?
Valgrind Memcheck is a tool that detects memory leaks and memory errors. Some of the most difficult C bugs come from mismanagement of memory: allocating the wrong size, using an uninitialized pointer, accessing memory after it was freed, overrunning a buffer, and so on.
What is Valgrind file?
Description. Valgrind is a flexible program for debugging and profiling Linux executables. It consists of a core, which provides a synthetic CPU in software, and a series of debugging and profiling tools. The architecture is modular, so that new tools can be created easily and without disturbing the existing structure.
Is Valgrind open source?
Valgrind is Open Source / Free Software, and is freely available under the GNU General Public License, version 2.
How is Valgrind implemented?
Valgrind operates on its own stack, VG_(stack) , which it switches to at startup, temporarily switching back to the client’s stack when doing system calls for the client. Valgrind also receives signals on its own stack, VG_(sigstack) , but for different gruesome reasons discussed below.
How does Valgrind work internally?
Valgrind uses shadow registers and shadow memory to instrument read/write instructions, read/write system call, stack and heap allocations. Valgrind provides wrappers around the system call and registers for pre and post callbacks for every system call to track the memory accessed as part of the system call.
How is Valgrind used for debugging?
The Valgrind core provides a built-in gdbserver implementation, which is activated using –vgdb=yes or –vgdb=full . This gdbserver allows the process running on Valgrind’s synthetic CPU to be debugged remotely. GDB sends protocol query packets (such as “get register contents”) to the Valgrind embedded gdbserver.