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Kernel: Make it possible for KBufferBuilder creation to fail

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This patch adds KBufferBuilder::try_create() and treats it like anything
else that can fail. And so, failure to allocate the initial internal
buffer of the builder will now propagate an ENOMEM to the caller. :^)
This commit is contained in:
Andreas Kling
2021-09-07 15:54:23 +02:00
parent be613b9ef6
commit 300402cc14
9 changed files with 30 additions and 13 deletions
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7
Kernel/Process.cpp
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@@ -575,7 +575,12 @@ bool Process::dump_perfcore()
}
auto& description = *description_or_error.value();
KBufferBuilder builder;
auto builder_or_error = KBufferBuilder::try_create();
if (builder_or_error.is_error()) {
dbgln("Failed to generate perfcore for pid {}: Could not allocate KBufferBuilder.", pid());
return false;
}
auto builder = builder_or_error.release_value();
if (!m_perf_event_buffer->to_json(builder)) {
dbgln("Failed to generate perfcore for pid {}: Could not serialize performance events to JSON.", pid().value());
return false;