labath added inline comments.
================
Comment at:
lldb/source/Plugins/SymbolFile/Breakpad/SymbolFileBreakpad.cpp:388-392
for (llvm::StringRef line : lines(Record::Func)) {
if (auto record = FuncRecord::parse(line))
add_symbol(record->Address, record->Size, record->Name);
}
----------------
zequanwu wrote:
> zequanwu wrote:
> > labath wrote:
> > > zequanwu wrote:
> > > > labath wrote:
> > > > > Can you check if we can remove this now?
> > > > >
> > > > > I originally thought that we can remove this entire function, but I
> > > > > forgot about PUBLIC records -- we don't have functions or compile
> > > > > units for those, so they will have to stay.
> > > > Removing it causes FUNC records not showing up in symtab when doing
> > > > `image dump symtab ...` and fails some tests.
> > > > The Breakpad doc says
> > > > (https://chromium.googlesource.com/breakpad/breakpad/+/HEAD/docs/symbol_files.md#records-4):
> > > >
> > > > > If a given address is covered by both a PUBLIC record and a FUNC
> > > > > record, the processor uses the FUNC data.
> > > >
> > > It's expected that the tests verifying symtab contents need updating
> > > after you remove some things from it. It's also possible some other tests
> > > will need minor tweaks (like the one in `line-table.test:54`) because of
> > > small differences in output format.
> > >
> > > Whether this is a reasonable change cannot be judged by failing tests
> > > alone. You also need to evaluate the overall quality of the debugger
> > > output. That will have to be a judgement call, but I'm hoping it won't be
> > > a hard one. For example, the change in line-table.test was definitely for
> > > the better.
> > >
> > > >> If a given address is covered by both a PUBLIC record and a FUNC
> > > >> record, the processor uses the FUNC data.
> > >
> > > And if an address is covered both by a Symtab Symbol, and an SymbolFile
> > > Function, lldb will preferentially (in backtraces, for instance) display
> > > information from the Function, so I think (hope) that this is going to
> > > work exactly as desired.
> > These two commands `image lookup -n ...` and `image show-unwind -n ..` also
> > failed to give any information if the name is from FUNC records.
> Oh, maybe those commands use `FindFunctions` to lookup for function by name?
Yes, that will most likely be it.
If implementing FindFunctions ends up being non-trivial, we can do that (along
with the symtab removal) in a separate patch.
Repository:
rG LLVM Github Monorepo
CHANGES SINCE LAST ACTION
https://reviews.llvm.org/D113163/new/
https://reviews.llvm.org/D113163
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