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SPDX License Identifiers are a more compact / standardized
way of representing file license information.
See: https://spdx.dev/resources/use/#identifiers
This was done with the `ambr` search and replace tool.
ambr --no-parent-ignore --key-from-file --rep-from-file key.txt rep.txt *
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This helper is used by libgcc_s to figure out where the .eh_frame sections
are located for all loaded shared objects.
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This may seem like a no-op change, however it shrinks down the Kernel by a bit:
.text -432
.unmap_after_init -60
.data -480
.debug_info -673
.debug_aranges 8
.debug_ranges -232
.debug_line -558
.debug_str -308
.debug_frame -40
With '= default', the compiler can do more inlining, hence the savings.
I intentionally omitted some opportunities for '= default', because they
would increase the Kernel size.
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Dumping core can happen at the end of a profiling run, and in that case
we have to protect the target process and take the lock while iterating
over its region map.
Fixes #4509.
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And make an effort to propagate errors out from the inner parts.
This fixes an issue where the kernel would infinitely loop in coredump
generation if the TmpFS filled up.
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This makes it an error to assign to it after construction.
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LexicalPath is a big and heavy class that's really meant as a helper
for extracting parts of a path, not for storage or passing around.
Instead, pass paths around as strings and use LexicalPath locally
as needed.
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When a process crashes, we generate a coredump file and write it in
/tmp/coredumps/.
The coredump file is an ELF file of type ET_CORE.
It contains a segment for every userspace memory region of the process,
and an additional PT_NOTE segment that contains the registers state for
each thread, and a additional data about memory regions
(e.g their name).
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