Each use of the byte array uses a different alias. This makes the
backend less likely to reuse previously computed byte array addresses,
improving the security of the CFI mechanism based on this pass.
Differential Revision: http://reviews.llvm.org/D8455
llvm-svn: 232770
This change also introduces a link-time optimization level of 1. This
optimization level runs only the globaldce pass as well as cleanup passes for
passes that run at -O0, specifically simplifycfg which cleans up lowerbitsets.
http://lists.cs.uiuc.edu/pipermail/llvm-commits/Week-of-Mon-20150316/266951.html
llvm-svn: 232769
This creates a new top-level folder called Initialization which
is intended to hold code specific to LLDB system initialization.
Currently this holds the Initialize() and Terminate() functions,
as well as the fatal error handler.
This provides a means to break the massive dependency cycle which
is caused by the fact that Debugger depends on Initialize and
Terminate which then depends on the entire LLDB project. With
this structure, it will be possible for applications to invoke
lldb_private::Initialize() directly, and have that invoke
Debugger::Initialize.
llvm-svn: 232768
Summary:
sc.block->AppendVariables(...) returns 0 if there are no arguments or local
variables, but we still need to check for global variables.
Test Plan:
```
$ cat test.cpp
int i;
int main() {
}
$ lldb test -o 'b main' -o r
(lldb) script
>>> print lldb.frame.FindValue('i', lldb.eValueTypeVariableGlobal)
(int) i = 0 # as opposed to "No value"
```
Reviewers: jingham, ovyalov, vharron, clayborg
Reviewed By: clayborg
Subscribers: lldb-commits
Differential Revision: http://reviews.llvm.org/D8464
llvm-svn: 232767
consider C++ that looks like:
inline int &f(bool b) {
if (b) {
static int i;
return i;
}
static int i;
return i;
}
Both 'i' variables must have distinct (and stable) names for linkage
purposes. The MSVC 2013 ABI would number the variables using a count of
the number of scopes that have been created. However, the final 'i'
returns to a scope that has already been created leading to a mangling
collision.
MSVC 2015 fixes this by giving the second 'i' the name it would have if
it were declared before the 'if'. However, this results in ABI breakage
because the mangled name, in cases where there was no ambiguity, would
now be different.
We implement the new behavior and only enable it if we are targeting the
MSVC 2015 ABI, otherwise the old behavior will be used.
This fixes PR18131.
llvm-svn: 232766
`StripDebug` was only used by tools/opt/opt.cpp in
`AddStandardLinkPasses()`, but opt.cpp adds the same pass based on its
command-line flag before it calls `AddStandardLinkPasses()`. Stripping
debug info twice isn't very useful.
llvm-svn: 232765
Summary: This patch also fixes one test case that failed in the library version of is_convertible.
Reviewers: mclow.lists, EricWF
Reviewed By: EricWF
Subscribers: cfe-commits
Differential Revision: http://reviews.llvm.org/D8456
llvm-svn: 232764
Summary:
Clean up all the different possible CMake options for specifying the ABI include paths into one CMake option named `LIBCXX_CXX_ABI_INCLUDE_PATHS`.
The documentation has been updated to reflect this change.
For the next week I have added explicit errors if any of the old flags is used. These errors inform users of the change and the new option to use.
Before committing the change I will announce this change on cfe-dev.
Reviewers: danalbert, mclow.lists
Reviewed By: danalbert, mclow.lists
Subscribers: jroelofs, cbergstrom, cfe-commits
Differential Revision: http://reviews.llvm.org/D5039
llvm-svn: 232762
This warns when using decls that are not available on all deployment targets.
For example, a call to
- (void)ppartialMethod __attribute__((availability(macosx,introduced=10.8)));
will warn if -mmacosx-version-min is set to less than 10.8.
To silence the warning, one has to explicitly redeclare the method like so:
@interface Whatever(MountainLionAPI)
- (void)ppartialMethod;
@end
This way, one cannot accidentally call a function that isn't available
everywhere. Having to add the redeclaration will hopefully remind the user
to add an explicit respondsToSelector: call as well.
Some projects build against old SDKs to get this effect, but building against
old SDKs suppresses some bug fixes -- see http://crbug.com/463171 for examples.
The hope is that SDK headers are annotated well enough with availability
attributes that new SDK + this warning offers the same amount of protection
as using an old SDK.
llvm-svn: 232750
When we encounter a global with a comdat, rather than iterating over
every global in the module to find globals in the same comdat, store the
members in a multimap. This effectively lowers the complexity to O(N log N),
improving performance significantly for large modules such as might be
encountered during LTO.
It looks like we used to do something like this until r219191.
No functional change.
Differential Revision: http://reviews.llvm.org/D8431
llvm-svn: 232743
Summary:
This changes all reporting of addresses from lldb-mi to be 64 bit capable. There could have been cases where a 64 bit address was getting truncated to 32 bit format.
Patch from chuckr@microsoft.com
Reviewers: abidh, ChuckR
Reviewed By: abidh
Subscribers: paulmaybee, ki.stfu, zturner, lldb-commits
Differential Revision: http://reviews.llvm.org/D8238
llvm-svn: 232736
Summary:
CUDA 7.0's libdevice uses slightly different IR to call __nvvm_reflect
and that triggers an assertion in nvvm_reflect optimization pass. This
change allows nvvm_reflect pass to deal with both old and new ways to
pass an argument to __nvvm_reflect.
Test Plan: ninja check-all
Reviewers: eliben, echristo
Subscribers: jholewinski, llvm-commits
Differential Revision: http://reviews.llvm.org/D8399
llvm-svn: 232732
This reverts commit r230580.
extern_weak functions don't appear to work on Darwin (PR22951), so we'll
need to come up with a new approach.
llvm-svn: 232731
The dependencies for cross-built tablegen were a bit confused. This fixes that. The following dependencies are now enforced:
(1) Tablegen tasks depend on the native tablegen
(2) Native tablegen depends on the cross-compiled tablegen
Although the native tablegen doesn't actually require the cross tablegen, having this dependency forces the native tablegen to rebuild whenever the cross tablegen changes.
llvm-svn: 232730
NFC currently but required as a prerequisite for using
the Microsoft resource compiler in conjunction with
CMake's ninja generator, which knows how to filter flags
appropriately, but not definitions.
Differential Revision: http://reviews.llvm.org/D8188
llvm-svn: 232727
We know all subclasses in tblgen so just generate a giant switch for
the few virtual methods or turn them into a member variable using spare
bits. The giant jump tables aren't pretty but still much smaller than
a vtable for every attribute, shrinking Release+Asserts clang by ~400k.
Also halves the size of the Attr base class. No functional change
intended.
llvm-svn: 232726
Some application on Linux an all application on android close stdout and
stderr during the libc exit stage. Previously the master file descriptor
of the pseudo terminal used to communicate with the inferior was closed
on an EOF causing a race condition and a possible SIGHUP on process
exit. After this change the master file descriptor will be closed by the
destructor of the GDBRemoteCommunicationServerLLGS class.
Differential revision: http://reviews.llvm.org/D8436
llvm-svn: 232724
Peter Collingbourne