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I noticed there is ~/.debug/ contain probes and elf files for many libraries. What program actually create this? structure like this:

.debug/ ├── .build-id ├── home ├── [kernel.kallsyms] ├── usr
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This directory is created by perf command.

perf.wiki.kernel.org: The build-id cache

Given that build-id are immutable, they uniquely identify a binary. If a binary is recompiled, a new build-id is generated and a new copy of the ELF images is saved in the cache. The cache is saved on disk in a directory which is by default $HOME/.debug.

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