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For the update of LLVM 9, Cling required another patch to Clang for
replacing the children of a CompoundStmt. Instead solve this by
creating a new CompoundStmt with the right Stmts attached.
Co-authored-by: Jonas Hahnfeld <Hahnfeld@itc.rwth-aachen.de>
Co-authored-by: Jonas Hahnfeld <hahnjo@hahnjo.de>
Unfortunately this break external tools such as cling which alters CompoundStmts
to implement its interactive extensions.
We have implemented a patch in clang which brings the old facilities only when
the new interface CompoundStmt::replaceStmts is called.
See llvm-mirror/clang@d0ee47a
ForVisibleRedeclaration does not try to deserialize content from module files.
It should be used for efficiency and when we are sure that what we look up is
in the present TU and it does not make sense to ask the module files.
See llvm-mirror/clang@6bbe311
When using these modifiers, a type can consist of multiple tokens
as for example "unsigned int". However the keyword "int" can also
be omitted, making "unsigned" itself also a valid type.
Note that this only handles the most basic case for the modifiers.
The size modifiers "short", "long", and "long long" would need
similar treatment. Moreover the standard permits any order for the
type specifiers, ie "unsigned long long int" and "long int unsigned
long" are both valid (and actually the same type).
Without resetting the eval context to the Parser default (PotentiallyEvaluated),
recursive parsing can potentially assume wrong context and not emit referenced entities.
Assuming that page_size is a power of 2, the calculation of the
base address of the page can be simplified and avoid a division.
According to POSIX, either MS_SYNC or MS_ASYNC must be specified
when calling msync(). Failure to include one of these flags will
cause msync() to fail on some systems.
When msync() returns -1, the pointer is only considered invalid
when errno is set to ENOMEM. In principle, the other possible
values for errno won't happen, but if they do, that should be
considered an error, hence the assert condition needed an update.
EBUSY shouldn't happen since we do not add MS_INVALIDATE to flags,
and EINVAL shouldn't happen because we always pass a multiple of
the page size to msync(). EFAULT is only used in Linux 2.4.18 and
earlier instead of ENOMEM.
The implementation of class->library mapping makes a call to the
LookupHelper::findScope. This makes the recursive invocations to
LookupHelper::findScope -> ... -> LookupHelper::findScope happen more often.
The getNameAsString interface causes a lot of temporary allocations.
The analysis if a decl is a cling-style wrapper can work only on a
simple declarations on the global scope.
This patch filters out complex declarations (eg in namespaces) and
checks only the identifier content.
The patch reduces the memory footprint difference shown in root-project/root#3012.
Calling VirtualQuery() is very expansive. For example, the testUnfold5a.C tutorial (interpreted) times out after 3600 seconds, and runs in about 60 seconds without calling VirtualQuery(). So just bypass it and return true for the time being
Visual Studio 2017 doesn't use the registry anymore, so no need to try to find keys. This prevent picking wrong directories in the case there is another version installed on the computer, and prevent also the following errors when starting ROOT:
RegQueryValueEx: returned 2: The system cannot find the file specified.
RegOpenKeyEx: returned 2: The system cannot find the file specified.
Now, it is possible to define functions with c++ attributes without the .rawInput mode. For example functions like `[[ noreturn ]] foo() { ... }` or `[[deprecated]] [[nodiscard]] int bar(){ … }`.
in CIFactory:
- Add -fno-threadsafe-statics flag (for Windows only), to prevent potential unresolved symbols at run-time
in MetaProcessor::readInputFromFile:
- add required std::ifstream::binary flag when opening the std::ifstream
- add missing backslashes
in PlatformWin:
- properly format error messages
- in IsDLL(): check and return false if the file size is 0
- fix _CxxThrowException symbol name (not fully understood - to be reviewed)
- filter out a couple of system dlls when looking for symbols
TClingClassInfo has a constructor that is supposed to be used for TU
scope lookups. However, it iterates over decls and causes lots of
deserializations. It does not respect the C++ lookup rules because it
returns the first decl with the name it finds.
This patch tries to keep the original behavior by first trying to do
a regular lookup and if the result is unambigious it returns the found
decl. If the result was ambiguous we try to disambiguate it (by turning
off the using directives) and return the found result.
- Switch object format from ELF (Linux) to COFF (Windows)
- Fix mangled symbols lookup on Windows: remove leading '_' and use malloc to simulate __imp_ variables (that are indirection pointers)
The Visual Studio 2017 path is very different than the previous versions, and even the registry entries are completely different, so for now let's try the trivial way first (using the %VCToolsInstallDir% environment variable)
