CODEWITHSUNDEEP
gdb
Zlatko
Zlatko

Reputation: 95

GDB Core Analysis of a thread core dump

For some reason, the generated core file is only a core from a thread that is part of the main application.

When I load it with the binary that actualy crashed, I get

BFD: Warning: core is truncated: expected core file size >= 40919040, found: 61440.

How can I tell gdb that this is a thread from that binary?

Upvotes: 1

Views: 4228

Answers (1)

Employed Russian
Employed Russian

Reputation: 213385

For some reason, the generated core file is only a core from a thread that is part of the main application.

Whatever led you to conclude that? That conclusion is most likely wrong.

BFD: Warning: core is truncated: expected core file size >= 40919040, found: 61440.

This message means exactly what it says: your core file should have been 40919040 bytes in size, but isn't.

The most likely reasons:

  • you had ulimit -c set to 15 (too low)
  • you had run out of disk space
  • you have copied only part of the actual core (e.g. by hitting Control-C, or getting network disconnected during transfer)

Upvotes: 3

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