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This subdirectory is meant to hold all constant data related to the
kernel. This means that this data is never meant to updated and is
relevant from system boot to system shutdown.
Move the inodes of "load_base", "cmdline" and "system_mode" to that
directory. All nodes under this new subdirectory are generated during
boot, and therefore don't require calling kmalloc each time we need to
read them. Locking is also not necessary, because these nodes and their
data are completely static once being generated.
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As usual, this removes many unused includes and moves used includes
further down the chain.
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Splitting this into a separate commit was an afterthought, so this does
not yet feature any fallible operations.
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This is a preparatory step to making `get()` return `ErrorOr`.
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This will make it easier to support both string types at the same time
while we convert code, and tracking down remaining uses.
One big exception is Value::to_string() in LibJS, where the name is
dictated by the ToString AO.
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We have a new, improved string type coming up in AK (OOM aware, no null
state), and while it's going to use UTF-8, the name UTF8String is a
mouthful - so let's free up the String name by renaming the existing
class.
Making the old one have an annoying name will hopefully also help with
quick adoption :^)
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Otherwise, we end up propagating those dependencies into targets that
link against that library, which creates unnecessary link-time
dependencies.
Also included are changes to readd now missing dependencies to tools
that actually need them.
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Each of these strings would previously rely on StringView's char const*
constructor overload, which would call __builtin_strlen on the string.
Since we now have operator ""sv, we can replace these with much simpler
versions. This opens the door to being able to remove
StringView(char const*).
No functional changes.
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MappedFile is strictly a userspace thing, so it doesn't belong in AK
(which is supposed to be user/kernel agnostic.)
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Also add slightly richer parse errors now that we can include a string
literal with returned errors.
This will allow us to use TRY() when working with JSON data.
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Replace Result<T, E> with ErrorOr<T> and propagate the error to callers.
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Calculating source code positions can be expensive, and some
applications (like SystemMonitor's Stack tab) don't even show this
information, making these calculations wasteful.
This commit adds a new enumerated flag to the `symbolicate` functions
for callers to specify whether source positions should be included in
the results; it defaults to "Yes" to preserve old behavior for existing
applications.
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All its members are comparable themselves, so this can be defaulted.
Making it comparable will allow us, among other things, to check if a
list of symbols (i.e., the result of calling the symbolicate functions)
is equal or not to another, which in turn will allow us to avoid
refreshing the SystemMonitor's Stack tab when successive symbolicated
stacks are the same.
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This small patch allows SystemMonitor's Stack tab to show the name of
the ELF object to which the displayed address refers to. This gives a
bit more of contextual information to the viewer.
A better to show this is probably a table, but I'm not that familiar yet
with the GUI framework in general, so I'm keeping things simple.
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While trying to investigate a problem with the ssl module in the python
port I found that the SystemMonitor Stack tab for a process wouldn't
show the symbols for the libssl and libcrypto shared libraries that are
installed under /usr/local/lib. The main reason for this is that
LibSymbolication didn't look for libraries under /usr/local/lib.
This commit adds support for looking for libraries under /usr/local/lib.
Absolute paths are still respected, and lookup gives precedence to
/usr/lib, just like dynamic linker does.
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This was probably the intended behavior, but a return statement was
missing.
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We were incorrectly assuming that the mapped .text segment for an ELF
image was always at the base of the image mapping. Now that we have
.rodata mappings as well, it's possible for one of them to come before
the .text.
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This is required to avoid copying the image where otherwise a reference
would be enough.
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This enables further work on implementing KASLR by adding relocation
support to the pre-kernel and updating the kernel to be less dependent
on specific virtual memory layouts.
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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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This speeds up the boot process considerably when specifying the kernel
image via -initrd.
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The first stack frame represents the current instruction pointer
rather than the return address so we shouldn't subtract one
from it.
Fixes #8162.
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This fixes an issue were some LibDebug objects (for example,
Dwarf::CompilationUnit) held a reference to their parent
Dwarf::DwarfInfo object, which was constructed on the stack and later
moved to the heap.
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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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