When reserving copy relocation space for a shared symbol, scan the DSO's
program headers to see if the symbol is in a read-only segment. If so,
reserve space for that symbol in a new synthetic section named .bss.rel.ro
which will be covered by the relro program header.

This fixes the security issue disclosed on the binutils mailing list at:
https://sourceware.org/ml/libc-alpha/2016-12/msg00914.html

Differential Revision: https://reviews.llvm.org/D28272

llvm-svn: 291524

This is in preparation for my next change, which will introduce a relro
nobits section. That requires that relro sections appear at the end of the
progbits part of the r/w segment so that the relro nobits section can appear
contiguously.

Because of the amount of churn required in the test suite, I'm making this
change separately.

llvm-svn: 291523

We currently limit the length of TSan returned backtraces to 8, which is not necessary (and a bug, most likely). Let's remove this.

Differential Revision: https://reviews.llvm.org/D28035

llvm-svn: 291522

llvm-svn: 291521

This method seems to have had a troubled life.  This patch proposes that it
replaces the recently added helper function dumpSUIdentifier.  This way, the
method can be used in other files using the SUnit class.

Differential revision: https://reviews.llvm.org/D28488

llvm-svn: 291520

It was complaining about ambiguity between llvm::detail and
llvm::support::detail:
  error C2872: 'detail': ambiguous symbol
  note: could be 'llvm::detail'
  note: or       'llvm::support::detail'

Standardize on llvm::support::detail to hide these symbols further.

llvm-svn: 291519

This has been fixed in the "new" LTO API used by Gold/LLD, this is
fixing the same issue in the libLTO API used by ld64 (amongst other)

llvm-svn: 291518

Followup on r291466 and include the proper header. This fixes:
https://build.chromium.org/p/chromium.fyi/builders/ClangToTMac/builds/12620/steps/gclient%20runhooks/logs/stdio

llvm-svn: 291517

Summary: Add an assert for hasLoopInvariantOperands

Reviewers: danielcdh, sanjoy

Subscribers: mzolotukhin, llvm-commits

Differential Revision: https://reviews.llvm.org/D28501

llvm-svn: 291516

llvm-svn: 291515

Use constexpr recursion for alignof like we do for sizeof. Seems to work
with Clang and MSVC. Also, don't recurse twice to avoid slowdowns in
compilers that don't memoize constexpr results (Clang).

llvm-svn: 291514

Reviewers: rsmith, EricWF

Subscribers: mehdi_amini, llvm-commits, EricWF

Differential Revision: https://reviews.llvm.org/D26038

llvm-svn: 291513

properly even when a non-type template parameter has a dependent type.

Previously, if a non-type template parameter was dependent, but not dependent
on an outer level of template parameter, we would not match the type of the
parameter. Under [temp.arg.template], we are supposed to check that the types
are equivalent, which means checking for syntactic equivalence in the dependent
case.

This also fixes some accepts-invalids when passing templates with auto-typed
non-type template parameters as template template arguments.

llvm-svn: 291512

Summary: Also, bypass quarantine altogether when quarantine size is set ot zero.

Reviewers: eugenis

Subscribers: kubabrecka, llvm-commits, mehdi_amini

Differential Revision: https://reviews.llvm.org/D28480

llvm-svn: 291511

llvm-svn: 291510

llvm-svn: 291509

Use the new --cmakedir option to obtain LLVM_CMAKE_PATH straight from
llvm-config. Fallback to local reconstruction if llvm-config does not
support this option.

llvm-svn: 291508

Use the new --cmakedir option to obtain LLVM_CMAKE_PATH straight from
llvm-config. Fallback to local reconstruction if llvm-config does not
support this option.

llvm-svn: 291506

Use the new --cmakedir option to obtain LLVM_CMAKE_PATH straight from
llvm-config. Fallback to local reconstruction if llvm-config does not
support this option.

llvm-svn: 291505

Use the new --cmakedir option to obtain LLVM_CMAKE_PATH straight from
llvm-config. Fallback to local reconstruction if llvm-config does not
support this option.

llvm-svn: 291504

This patch uses C++11 parameter packs and constexpr functions
to allow AlignedCharArrayUnion to hold an arbitrary number of
types.

Differential Revision: https://reviews.llvm.org/D28429

llvm-svn: 291503

Use the new --cmakedir option to obtain LLVM_CMAKE_PATH straight from
llvm-config instead of reconstructing it locally.

llvm-svn: 291502

Rafael suggested in review to wrap the `.` in an
`ABSOLUTE` op to force the section to be in the
*ABS* "section":

  * http://lists.llvm.org/pipermail/llvm-commits/Week-of-Mon-20170109/417865.html

llvm-svn: 291501

Use the new --cmakedir option to obtain LLVM_CMAKE_PATH straight from
llvm-config instead of reconstructing it locally.

llvm-svn: 291500

I unfortunately neglected to add it in r260540, but it has been
sitting in my working dir ever since. D'oh.

Modified to work with r290069, which made the CHECK patterns
themselves whitespace-sensitive as well, and remove the test added
then, as this tests both strict and non-strict modes.

llvm-svn: 291499

llvm-svn: 291498

As per discussion with mclow and EricWF on irc, this is small and
simple enough to deserve being inlined.

llvm-svn: 291497

This patch enables something like "-o /dev/null".
Previouly, it failed because such files cannot be renamed.

Differential Revision: https://reviews.llvm.org/D28010

llvm-svn: 291496

Use the new --cmakedir option to obtain LLVM_CMAKE_PATH straight from
llvm-config instead of reconstructing it locally.

Differential Revision: https://reviews.llvm.org/D26900

llvm-svn: 291495

If we split a filename into `Name` and `Prefix`, `Prefix` is at most
145 bytes. We had a bug that didn't split a path correctly. This bug
was pointed out by Rafael in the post commit review.

This patch adds a unit test for TarWriter to verify the fix.

llvm-svn: 291494

Forgot to add this file as a part of r291418.

llvm-svn: 291493

Swap two lines in __mutex_base. On systems with high clock rates, we could mistakenly return no_timeout when a mutex had timed out if we got a tick between these two lines.  Thanks to Brian Cain for the bug report.

llvm-svn: 291492

Differential Revision: https://reviews.llvm.org/D28418

llvm-svn: 291491

llvm-svn: 291490

llvm-svn: 291489

llvm-svn: 291488

Functional change: Previously, if a callee is cold, we used ColdThreshold if it minimizes the existing threshold. This was irrespective of whether we were optimizing for minsize (-Oz) or not. But -Oz uses very low threshold to begin with and the inlining with -Oz is expected to be tuned for lowering code size, so there is no good reason to set an even lower threshold for cold callees. We now lower the threshold for cold callees only when -Oz is not used. For default values of -inlinethreshold and -inlinecold-threshold, this change has no effect and this simplifies the code.

NFC changes: Group all threshold updates that are guarded by !Caller->optForMinSize() and within that group threshold updates that require profile summary info.

Differential revision: https://reviews.llvm.org/D28369

llvm-svn: 291487

Differential Revision:  https://reviews.llvm.org/D28479

llvm-svn: 291486

When writing to a non regular file we cannot rename to it. Since we
have to write, we may as well create a temporary file to avoid trying
to create an unique file in /dev when trying to write to /dev/null.

llvm-svn: 291485

Fix crash if __FUNCSIG__ is used in a function without a prototype, and use
"(void)" as parameter list instead of "()" for a function with a no-parameters
prototype, matching MSVC's observed behavior.

llvm-svn: 291484