I would like read a core-dump file dumped with gcore.
However, I would like to read a coredump file in my c++ application, not with gdb terminal command.
For instance, I have a executable program 'testEx' and it is killed by some reason then 'testEx' left a core dump.
I am creating a C++ application 'readGDB' to analyze core dump created by 'testEx'.
Any c++ library and example to read a core file?
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John Doyle
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Core files are just executable files (a.out or ELF or whatever it is on Mac OS X). So any library that reads executable formats will do. – n. m. could be an AI Aug 30 '15 at 12:54
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@n.m. If you wish to execute 'dump binary memory' command with gdb on given coredump, how would you do it in c++? – John Doyle Aug 30 '15 at 13:11
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I would read the memory with libelf or similar, then write it to a file. – n. m. could be an AI Aug 30 '15 at 13:41
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Any c++ library and example to read a core file?
Reading the core is trivial: you just open and read it.
What's not trivial is understanding what the contents means. A core file is an ELF file, so it has a lot of internal structure, and libraries such as libelf can help you read specific sections of the core.
But that's still long way away from what GDB does: to really understand the contents, you also need to implement symbol management, stack unwinding, and many more things. In short, you will have to re-implement half of GDB.
So why not just use GDB? You can talk to GDB from your application, and make it give you the answers you are seeking. GDB has a special machine interface mode for just that purpose.
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