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This removes all the hard-coded kernel base addresses from userspace
tools.
One downside for this is that e.g. Profiler no longer uses a different
color for kernel symbols when run as a non-root user.
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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 patch replaces ad-hoc generation of file URL strings with using
URL::create_with_file_scheme().
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This patch adds a few minor visual features to the `bt` utility:
- Number each frame of the back trace.
- Color the address based on if it's in kernel or user space.
- Add a "frames:" heading to visually seperate the thread id.
- Rename "tid: <tid>" -> "thread: <tid>" as it's more visually
appealing since it aligns vertically with "frames:"
- Add a visual " | " seperate between the address and symbol name.
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This functionality, while neat, isn't really something you need enabled
all the time. Let's make it opt-in instead. Pass MakeInspectable::Yes
to the Core::EventLoop constructor if you want your program to become
inspectable.
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Process-separated symbolication was cute, but ultimately the threat
model is kinda silly. We're already *running* the binary, but we're
afraid to parse its symbol table? :^)
This commit makes SystemMonitor and bt do symbolication in-process.
SymbolServer and the symbol user will be removed separately.
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Enumerate tid's from /proc/{pid}/stacks/ and use it to print the
backtrace for all active threads in the specified process.
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When the default build location was moved from /Build to the new
architecture specific directory, /Build/i686, this code broke.
All file names are now path relative one additional level up.
So continue the hack, and introduce another dummy directory to
make the relative paths resolve correctly.
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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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Good-bye LogStream. Long live AK::Format!
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If we can find a matching filename in /usr/src/serenity, let's make the
filenames in backtraces clickable to open that file.
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Since this is useful in many places, let's have a common implementation
of walking the stack of a given thread via /proc and symbolicating each
of the frames.
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The /boot directory is only accessible to root by default, but anyone
wanting access to kernel symbols for development can get them by making
/boot/Kernel accessible to the "symbol" user.
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Usage: bt <PID>
This program will print a symbolicated backtrace for the main thread of
the process with the given PID. It uses SymbolServer for the
symbolication.
There's a lot of room for improvement in this command, but it is pretty
neat already. :^)
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