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This was visible for memory regions with empty name.
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This allows the user to open the crash coredump in Hack Studio and
inspect it in the Debug tab.
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Previously, when the --unlink flag was passed to CrashReporter, it
unlinked the coredump file immediately after reading it.
This change makes it so the coredump file is deleted when CrashReporter
exits.
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Some coredumps take a long time to symbolicate, so let's show a simple
window with a progress bar while they are loading.
I'm not super happy with the factoring of this feature, but it's an
absolutely kickass feature that makes crashing feel 100% more responsive
than before, since you now get GUI feedback almost immediately after a
crash occurs. :^)
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Before this patch, this is what would happen after something crashed:
1. CrashDaemon finds a new coredump in /tmp
2. CrashDaemon compresses the new coredump (gzip)
3. CrashDaemon parses the uncompressed coredump and prints a backtrace
4. CrashDaemon launches CrashReporter
5. CrashReporter parses the uncompressed coredump (again)
6. CrashReporter unlinks the uncompressed coredump
7. CrashReporter displays a GUI
This was taking quite a long time when dealing with large programs
crashing (like Browser's WebContent processes.)
The new flow:
1. CrashDaemon finds a new coredump in /tmp
2. CrashDaemon mmap()'s the (uncompressed) coredump
3. CrashDaemon launches CrashReporter
4. CrashDaemon goes to sleep for 3 seconds (hack alert!)
5. CrashReporter parses the (uncompressed) coredump
6. CrashReporter unlinks the (uncompressed) coredump
7. CrashReporter displays a GUI
8. CrashDaemon wakes up (after step 4)
9. CrashDaemon compresses the coredump (gzip)
TL;DR: we no longer parse the coredumps twice, and we also prioritize
launching the CrashReporter GUI immediately when a new coredump shows
up, instead of compressing and parsing it in CrashDaemon first.
The net effect of this is that you get a backtrace on screen much
sooner. That's pretty nice. :^)
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We all know what a coredump is, and it feels more natural to refer to
it as a coredump (most code already does), so let's be consistent.
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This allows for typing [8] instead of [8, 8, 8, 8] to specify the same
margin on all edges, for example. The constructors follow CSS' style of
specifying margins. The added constructors are:
- Margins(int all): Sets the same margin on all edges.
- Margins(int vertical, int horizontal): Sets the first argument to top
and bottom margins, and the second argument to left and right margins.
- Margins(int top, int vertical, int bottom): Sets the first argument to
the top margin, the second argument to the left and right margins,
and the third argument to the bottom margin.
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Depending on the values it might be difficult to figure out whether a
value is decimal or hexadecimal. So let's make this more obvious. Also
this allows copying and pasting those numbers into GNOME calculator and
probably also other apps which auto-detect the base.
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The LexicalPath instance methods dirname(), basename(), title() and
extension() will be changed to return StringView const& in a further
commit. Due to this, users creating temporary LexicalPath objects just
to call one of those getters will recieve a StringView const& pointing
to a possible freed buffer.
To avoid this, static methods for those APIs have been added, which will
return a String by value to avoid those problems. All cases where
temporary LexicalPath objects have been used as described above haven
been changed to use the static APIs.
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This adds component declarations so that users can select to not build
certain parts of the OS.
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Since applications using Core::EventLoop no longer need to create a
socket in /tmp/rpc/, and also don't need to listen for incoming
connections on this socket, we can remove a whole bunch of pledges!
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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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Crash reports for page faults now tell you what kind of memory access
failed and where. :^)
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We were rebuilding the metadata map a bunch of times on startup.
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Most coredumps contain large amounts of consecutive null bytes and as
such are a prime candidate for compression.
This commit makes CrashDaemon compress files once the kernel finishes
emitting them, as well as adds the functionality needed in LibCoreDump
to then parse them.
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Good-bye LogStream. Long live AK::Format!
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This enables format string checks for three more functions:
- String::formatted()
- Builder::appendff()
- KBufferBuilder::appendff()
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This was needlessly expecting the first backtrace entry function name to
start with '__assertion_failed', which is no longer the case - it's now
something from libsystem.so. Let's just check whether we have an
'assertion' key in the coredump's metadata, just like we do for pledge
violations.
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Now that WindowServer broadcasts the system theme using an anonymous
file, we need clients to pledge "recvfd" so they can receive it.
Some programs keep the "shared_buffer" pledge since it's still used for
a handful of things.
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Closes #4777 .
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Arguments as a simple label, environment in a new tab. :^)
Closes #4779.
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We want to show an individual backtrace for each thread, not one
containing backtrace entries from all threads.
Fixes #4778.
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Since CrashReporter will be showing more info from coredumps soon, we
need tabs to put those things somewhere! :^)
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This is in preparation of adding (much) more process information to
coredumps. As we can only have one null-terminated char[] of arbitrary
length in each struct it's now a single JSON blob, which is a great fit:
easily extensible in the future and allows for key/value pairs and even
nested objects, which will be used e.g. for the process environment, for
example.
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This is needed for the new way we transfer window backing stores.
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