zloyrobot marked 2 inline comments as done.
zloyrobot added inline comments.
================
Comment at: lldb/source/Plugins/SymbolFile/NativePDB/SymbolFileNativePDB.cpp:110
+
+static std::string findPdbFile(const llvm::StringRef exe_path, const
llvm::StringRef pdb_file, llvm::file_magic &magic) {
+ auto ec = llvm::identify_magic(pdb_file, magic);
----------------
labath wrote:
> zloyrobot wrote:
> > labath wrote:
> > > I find the interface of this function odd. First, the `const`s on the
> > > StringRef argument are useless and should be removed. Secondly, the
> > > by-ref return of the `magic` argument is something that would be nice to
> > > avoid. It looks like that could easily be done here by just checking
> > > whether the file exists and doing the identify_magic check in the caller
> > > (if you want an existing-but-not-pdb file to abort the search), or by
> > > checking the signature in this function (if you want to skip past non-pdb
> > > files). Also, this patch could use clang-formatting as this line is over
> > > the column limit.
> > I want to skip past non-pdb files. Am I understand correctly that you
> > suggest me to get rid of file_magic parameter and call identify_magic (open
> > and read pdb file) additional time (in caller)?
> In that case, what you could do is get rid of the `magic` as an argument, and
> change this function to return a valid result, only if you found the file
> *and* that files magic number is correct. (note that this is not what the
> current implementation does)
got it, thanks
================
Comment at: lldb/source/Plugins/SymbolFile/NativePDB/SymbolFileNativePDB.cpp:111
+static std::string findPdbFile(const llvm::StringRef exe_path, const
llvm::StringRef pdb_file, llvm::file_magic &magic) {
+ auto ec = llvm::identify_magic(pdb_file, magic);
+ if (!ec)
----------------
labath wrote:
> zloyrobot wrote:
> > labath wrote:
> > > Llvm policy is to use `auto` "if and only if it makes the code more
> > > readable"
> > > <http://llvm.org/docs/CodingStandards.html#use-auto-type-deduction-to-make-code-more-readable>.
> > > Whether that's the case here is somewhat subjective, but I'd say that
> > > none of the uses of auto in this patch are helping readability, as all
> > > the types used in this patch are short enough and spelling them out saves
> > > the reader from guessing whether `ec` really is a `std::error_code`, etc.
> > Please note that I moved ```auto ec = ...``` from original Turner's code
> yeah, I know, but that doesn't make it right. :) In fact, based on a random
> sample, I would guess that about 90% of uses of `auto ec` in llvm is
> @zturner's code. :P
>
> TBH, the `ec` is no the part I'm having problems with the most. If it was
> just that, I wouldn't mention it, but the fact that you're using it all over
> the place tells me you weren't aware of llvm's policy regarding `auto` (which
> explicitly states "don't 'almost always use auto'"), and I figured it's best
> to mention that early on.
Thanks for the clarifications, I updated the path
Repository:
rLLDB LLDB
CHANGES SINCE LAST ACTION
https://reviews.llvm.org/D60962/new/
https://reviews.llvm.org/D60962
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