Fix warnings

Commit migrated from https://github.com/dotnet/coreclr/commit/de7fb68db2c83cb31927270d97bf993437cf61c4

Merge pull request dotnet/coreclr#3915 from hughbe/region-info-params

Add parameter names to RegionInfo constructor

Commit migrated from https://github.com/dotnet/coreclr/commit/0a31fe90800bd45e3c3668483dbe27358864170e

Merge pull request dotnet/coreclr#3535 from hughbe/patch-3

Add parameter names to ArgumentExceptions in Guid

Commit migrated from https://github.com/dotnet/coreclr/commit/748095f77c4a488dd68ccf4bcce3e40c7b6a2b64

Merge pull request dotnet/coreclr#4247 from leemgs/upstream-cross-toolchain-unify2

Linux/ARM: Unifying the redundant usages of objcopy

Commit migrated from https://github.com/dotnet/coreclr/commit/056d77d198fc92d66c4e430dcc2fee6f6b333dc3

Merge pull request dotnet/coreclr#4283 from krytarowski/netbsd-support-61

Implement GetEntrypointExecutableAbsolutePath() on NetBSD

Commit migrated from https://github.com/dotnet/coreclr/commit/f6a0444dc41a6346d47a126f57bdb76bda85de05

Merge pull request dotnet/coreclr#4371 from krytarowski/netbsd-support-65

Add NetBSD support in dir.props

Commit migrated from https://github.com/dotnet/coreclr/commit/d28a79fcdbaaeff1da234442cf4e33666c1273f3

Merge pull request dotnet/coreclr#4348 from AndyAyersMS/FixPerfMapAV

Fix a segfault in perf map generation

Commit migrated from https://github.com/dotnet/coreclr/commit/e76bc409805b38f166e0a693ba622fd2078eab56

Merge pull request dotnet/coreclr#4373 from krytarowski/netbsd-support-67

NetBSD: Assume GNU GCC compatible va_list in Clang/LLVM

Commit migrated from https://github.com/dotnet/coreclr/commit/24b17f372868b05f1ece0b9b4be90eea7f650579

Merge pull request dotnet/coreclr#4401 from dotnet-bot/from-tfs

Merge changes from TFS

Commit migrated from https://github.com/dotnet/coreclr/commit/8aae835165a3760b84e84ee4c83770ab9b38a77f

Merge pull request dotnet/coreclr#4312 from mjsabby/muks/enable_rejit_xplat

Enable ReJIT on all platforms

Commit migrated from https://github.com/dotnet/coreclr/commit/47437ae83df211051670c6ca973555326f6e08ae

Merge pull request dotnet/coreclr#4392 from kyulee1/fixround

ARM64: Fix Round Operation

Commit migrated from https://github.com/dotnet/coreclr/commit/fdc7e90413f080a2871749f009c775b5d06c8522

ARM64: Fix Round Operation

Math.Round is implemented as a target intrinsic for Arm64.
JIT emitted `frinta` which rounds the ties to away.
As described in MSDN
https://msdn.microsoft.com/en-us/library/system.math.round(v=vs.110).aspx#Round2_Example,
we should round the ties to even.
So, I corrected `frintn` instruction instead for such intrinsic expansion.

I've also identified that `EvalMathFuncUnary` incorrectly folds the round
operation when the argument is constant at the compile time.
The logic itself is not the right semantic as described above in MSDN.
I made a separate helper function which is essentially a duplicate of
classlib. This is not Arm64 specific fix but applies to all other targets.
So, I just fixed it while I'm here.

Commit migrated from https://github.com/dotnet/coreclr/commit/75c97cff492584075b6e13d67a901c69c34ad4f9

Fix nidump to avoid crashing while working with Ready to Run images

[tfs-changeset: 1597064]

Commit migrated from https://github.com/dotnet/coreclr/commit/cd998ae421bb8fb68f170de8f016940084cf19e6

Merge pull request dotnet/coreclr#4394 from gkhanna79/VCRTArm64Fix

Fix Arm64 break

Commit migrated from https://github.com/dotnet/coreclr/commit/83e52facfec1ae6002ed9d0a474c300ab3dbe2fe

Merge pull request dotnet/coreclr#4391 from RussKeldorph/buildarch

Build break: Replace $(Platform) with $(BuildArch) in arch-specific IL projects

Commit migrated from https://github.com/dotnet/coreclr/commit/edb01ddc5a8c6e000f5a0c2e756684c09103ebea

Merge pull request dotnet/coreclr#4390 from pgavlin/JitCleanup

Cleanup some minor JIT issues.

Commit migrated from https://github.com/dotnet/coreclr/commit/9762dd09607ee1ff62b3e0b9eb4779ff4abec9e3

Fix Arm64 break

Commit migrated from https://github.com/dotnet/coreclr/commit/a0a3ee9f46ad22fa9a2cbcfa1b0afb54d382cf1f

Merge pull request dotnet/coreclr#4370 from krytarowski/netbsd-support-64

Print message about detected NetBSD

Commit migrated from https://github.com/dotnet/coreclr/commit/13b86edc0d28b4a91a3ec74a1d79c3d2903c94c1

Merge pull request dotnet/coreclr#4378 from krytarowski/netbsd-support-68

Implement GetProcessIdDisambiguationKey() for NetBSD

Commit migrated from https://github.com/dotnet/coreclr/commit/3666f86afb4425e42a613f11fa0af3dfb1667f58

Merge pull request dotnet/coreclr#4323 from BruceForstall/CLRABI

Add CLR ABI document to Book of the Runtime

Commit migrated from https://github.com/dotnet/coreclr/commit/1a89827d6ce553d793ffc0787129b07df0047457

Add CLR ABI document to Book of the Runtime

Commit migrated from https://github.com/dotnet/coreclr/commit/38d9bdd94e152b3c6b9ce72d107aa3545c09c01d

Replace $(Platform) with $(BuildArch) in arch-specific IL projects

I recently fixed some IL projects for non-x64 architectures, but I tested
the wrong property.  It appears that $(Platform) is set to AnyCpu, and
$(BuildArch) is what I want.

Commit migrated from https://github.com/dotnet/coreclr/commit/458614be779a274ab8aa0ac09309ec48f3209a8c

Standardize on `assert` in the JIT.

A small amount of JIT code was using `_ASSERTE` instead of `assert`.
Change that code to use `assert` instead, which operates correctly
w.r.t. the JIT host.

Commit migrated from https://github.com/dotnet/coreclr/commit/9038cb03c0179de2558beb18386b62606d2ea33d

Stanardize on `DEBUGARG` in the JIT.

The JIT uses both `DEBUGARG` (defined in jit.h) and `DEBUG_ARG`
(defined in /src/inc/check.h) for debug-only arguments. This
change replaces all uses of `DEBUG_ARG` with `DEBUGARG`.

Commit migrated from https://github.com/dotnet/coreclr/commit/60db675b54d35a92ead0ec3725df22d6d1f4e927

Remove uses of LP{,C}UTF8 in the JIT.

Replace these with the corresponding `char*` type.

Commit migrated from https://github.com/dotnet/coreclr/commit/ba68babd1c100a56664cbfd2071829a814269ed9

Merge pull request dotnet/coreclr#4381 from gkhanna79/VCRTFix

Cleanup VCRuntime140.dll dependency from native components

Commit migrated from https://github.com/dotnet/coreclr/commit/1caf7b98b5c75dcf47149a1f6b08ca93cb4f6c7b

Merge pull request dotnet/coreclr#3807 from CarolEidt/FirstClassStructsDoc

Design document for first-class structs

Commit migrated from https://github.com/dotnet/coreclr/commit/56d53715d9952ab7fcae8a763012a4749413f27c

Merge pull request dotnet/coreclr#4375 from AndyAyersMS/UseBudget

Inliner: use time budget to avoid excessive inlining

Commit migrated from https://github.com/dotnet/coreclr/commit/5b5a3df3d7d6c9c84afae2e69072da67f79ce459

Merge pull request dotnet/coreclr#4376 from pgavlin/GcInfoRemoveUtilcode

Stop including utilcode.h in the GC info encoder.

Commit migrated from https://github.com/dotnet/coreclr/commit/c794ab5aa6bdeab04bf64b1960f3d78ae4122f80

Implement GetProcessIdDisambiguationKey() for NetBSD

Make use of the kvm(3) interface to get "struct kinfo_proc2" of the given
process.

struct kinfo_proc2 {
///....
        uint32_t p_ustart_sec;          /* STRUCT TIMEVAL: starting time. */
        uint32_t p_ustart_usec;         /* STRUCT TIMEVAL: starting time. */
///...
};

  --- /usr/include/sys/sysctl.h

Commit migrated from https://github.com/dotnet/coreclr/commit/2aa6bdb773d4a6d181cc2ebde8026908c706ac94

Cleanup VCRuntime140.dll dependency from native components

Commit migrated from https://github.com/dotnet/coreclr/commit/7902a3a3eee17378a61ef6817af5e73dc3050cfc

Merge pull request dotnet/coreclr#4360 from kyulee1/fixpsp

ARM64: Fix Storing PSPSym for localloc

Commit migrated from https://github.com/dotnet/coreclr/commit/7186ed6a413bc9d90f20bcba63fd75bc8c3cdad6

ARM64: Fix Storing PSPSym for localloc

JIT incorrectly saves/restores PSPSym causing AVs in EH tests that have localloc with filter.
The fix is to use a right opcode (Load instead of Store) when saving PSPSym.

Commit migrated from https://github.com/dotnet/coreclr/commit/43b9c268c4ae32eb9b17111df79d57471661fe79

Merge pull request dotnet/coreclr#4357 from krytarowski/netbsd-support-63

NetBSD: Add support for PAL_IsDebuggerPresent()

Commit migrated from https://github.com/dotnet/coreclr/commit/f21291a702a4247b1dd1c3219eaf5319e94df061

Merge pull request dotnet/coreclr#4346 from LLITCHEV/Issue4276

Set the lvIsMultiRegArgOrRet for a variable containing the result of in-lined multi-register return call.

Commit migrated from https://github.com/dotnet/coreclr/commit/71f8969056232b6c01d57e5ad4d9dc53c6bc0e99

Merge pull request dotnet/coreclr#4369 from mikedn/msgbox

Always try to load user32 instead of ntuser api set

Commit migrated from https://github.com/dotnet/coreclr/commit/861e76a3b7c0b0cf1d6fbd6eb456a975c2ec9148

Fix a segfault in perf map generation

Make sure instance vars get initialized to nullptr.

Commit migrated from https://github.com/dotnet/coreclr/commit/00269b869058d414dfa9d116105b5e5e7a660853

NetBSD: Assume GNU GCC compatible va_list in Clang/LLVM

Retire unneeded __GNUC_VA_LIST as currently all platforms build with Clang.

Commit migrated from https://github.com/dotnet/coreclr/commit/bdef5b3249ba6e993ff5c58fa9e4aef6e3907bb6

Merge pull request dotnet/coreclr#4342 from ZhichengZhu/clrstackr

add sos clrstack -r option

Commit migrated from https://github.com/dotnet/coreclr/commit/c3271f108c8db5747b7b0d20857ab0de3e3d0c09

Merge pull request dotnet/coreclr#4368 from swgillespie/long-running-gc-fixes

Fix a difference in passing the sequential parameter between Bash and…

Commit migrated from https://github.com/dotnet/coreclr/commit/82371459a5edae4588a449d56a13eaf41559eba7

Stop including utilcode.h in the GC info encoder.

This required two other minor changes:
- A prototype for `ThrowOutOfMemory` is now defined in gcinfoencoder.h
- `BitArray` now defines an overload of `operator new` that accepts an
  `IAllocator`.

Commit migrated from https://github.com/dotnet/coreclr/commit/9e4dccced24917bb8d155331095404d1a28c7887

Merge pull request dotnet/coreclr#4372 from krytarowski/netbsd-support-66

NetBSD has RAND_MAX = 0x7fffffff

Commit migrated from https://github.com/dotnet/coreclr/commit/a63b3eebf0af73b33a063d3ed2c20898e88ac1f6

The RAND_MAX value can vary by platform

Noted on NetBSD where it is 0x7FFFFFFF.

Commit migrated from https://github.com/dotnet/coreclr/commit/a77b51cf518ea1441818944fb0b6c6456b8465d2

Inliner: use time budget to avoid excessive inlining

Use the time budget and time estimates to stop inlining once the
overall jit time increase estimate for the method is 10x the initial
jit time estimate.

This is implemented as part of `LegacyPolicy` and so can impact
the current inline behavior.

The budget is intentionally set quite high so that it only kicks in
for very rare cases where the call tree below the root is deep and wide
with many small methods. In extended testing on desktop this limit
fires in exactly two cases, both HFA tests.

In CoreCLR tests 12 of the HFA tests hit this limit. I've added
a directed test case here that came from the original bug report.

Closes dotnet/coreclr#2472.

Commit migrated from https://github.com/dotnet/coreclr/commit/597f78e55cc77dc75f25c5aa2471ea0e82e988cd

NetBSD: Add support for PAL_IsDebuggerPresent()

Reuse the kvm(3) interface to grab "struct kinfo_proc".

NAME
     kvm - kernel memory interface

LIBRARY
     Kernel Data Access Library (libkvm, -lkvm)

DESCRIPTION
     The kvm library provides a uniform interface for accessing kernel virtual
     memory images, including live systems and crash dumps.  Access to live
     systems is via /dev/mem while crash dumps can be examined via the core
     file generated by savecore(8).  The interface behaves identically in both
     cases.  Memory can be read and written, kernel symbol addresses can be
     looked up efficiently, and information about user processes can be
     gathered.

     kvm_open() is first called to obtain a descriptor for all subsequent
     calls

Commit migrated from https://github.com/dotnet/coreclr/commit/06ff0ff180dc0aa512481e5e4885b1f16e785a81

Merge pull request dotnet/coreclr#4347 from ramarag/zapnyi

Removing NYI for ZapUnwindData

Commit migrated from https://github.com/dotnet/coreclr/commit/9a3a4dd8a0bb90c6228b15ecf4d68c418d12206b

Always try to load user32 instead of ntuser api set

Commit migrated from https://github.com/dotnet/coreclr/commit/45dc0a07259473acedce2dfa2d0843accf8929e5

Merge pull request dotnet/coreclr#4140 from myungjoo/implement/4040

Implement StartUnwindingNativeFrames Linux/ARM

Commit migrated from https://github.com/dotnet/coreclr/commit/6f432d63f850a363818b9d42429f9f1e6b48432e

Merge pull request dotnet/coreclr#3240 from krytarowski/netbsd-support-50

Fix issue unveiled on NetBSD: Add PAL__vsnprintf shadow in PAL

Commit migrated from https://github.com/dotnet/coreclr/commit/3ea0f5f6af9a27a86b73e54a86d29651e74c9bd3

Add NetBSD support in dir.props

Commit migrated from https://github.com/dotnet/coreclr/commit/671d800cd4dba8fb44276ac87d572203523210a6

Print message about detected NetBSD

Commit migrated from https://github.com/dotnet/coreclr/commit/c34dabb07d321e5a3dd46f42a6c69e160b4ff3fb

Set the lvIsMultiRegArgOrRet for a variable containing the result of
inlined multi-register return call.

This change makes sure the lvIsMultiRegArgOrRet on a variable used to
store the result of inlined multi-register return function is set.
The way the code works today, this is not an issue since the code in
fgAttachStructInlineeToAsg always uses a CopyObj/Blk to asign the return
value from the registers to the var on stack. The CopyBlock/Obj gets the
address of the variable making it address-exposed and that prevents struct
promotion.
In the future (when CopyObj/Blk is not used) not having
lvIsMultiRegArgOrRet set could cause a problem.

Fixes issue 4276.

Commit migrated from https://github.com/dotnet/coreclr/commit/d07a34f33a862a40a1456cbff245a1e141a7264d

Fix a difference in passing the sequential parameter between Bash and Batch

Commit migrated from https://github.com/dotnet/coreclr/commit/9530cdd3a61f9eb15a97e8f0888be12e0390aa99

add clrstack -r option

Commit migrated from https://github.com/dotnet/coreclr/commit/f5d3c1339a3c8f8cf9bfa1f000ea91ef7a8e6c62

Merge pull request dotnet/coreclr#4359 from gkhanna79/ROLibFix2

DelayLoadAndFixWinRTInterop

Commit migrated from https://github.com/dotnet/coreclr/commit/02d18c9eceeb3c4e80c5c59dbc8103294adc86af

Merge pull request dotnet/coreclr#4361 from joperezr/AddServiceableAttribute

Adding Serviceable attribute to mscorlib

Commit migrated from https://github.com/dotnet/coreclr/commit/e2ce9af7fbb696cfcc3d6da966e8bb1379fd74ea

Merge pull request dotnet/coreclr#4352 from kouvel/ArmAssertFix

Fix assertion failure on ARM

Commit migrated from https://github.com/dotnet/coreclr/commit/18487e02501fd13ba67e6d5dc1e2f145109eb2db

Merge pull request dotnet/coreclr#4338 from pgavlin/AddJit32Build

Make it possible to build JIT32 in the OSS tree.

Commit migrated from https://github.com/dotnet/coreclr/commit/0514c3a85802febf4fdcbd4d6e2e831758407b58

Merge pull request dotnet/coreclr#4363 from mmitche/update-corefx-paths

Update the corefx copy steps to point to the new location

Commit migrated from https://github.com/dotnet/coreclr/commit/0119038292c8f68e781d68603648fdc1ff4a9cf5

Update the corefx copy steps to point to the new location

Commit migrated from https://github.com/dotnet/coreclr/commit/b5d4810cbb07f56e3e80534fe3303c53088879ac

Adding Serviceable attribute to mscorlib

Commit migrated from https://github.com/dotnet/coreclr/commit/62730f3e9f4b1b8cff342e5074238037712b769c

DelayLoadAndFixWinRTInterop

Commit migrated from https://github.com/dotnet/coreclr/commit/7242a30393c407edacd04d07bb710d8001565cd4

Merge pull request dotnet/coreclr#4355 from dotnet-bot/from-tfs

Merge changes from TFS

Commit migrated from https://github.com/dotnet/coreclr/commit/e811293a69eb4be72921beee4cc1518fe59721be

Implement StartUnwindingNativeFrames Linux/ARM

StartUnwindingNativeFrames for Unix/Linux ARM.
The code is ported from AMD64 code of the same function and OS.

CONTEXT_* are moved from context2.S to asmconstants.h so that
the same macros may be sharaed between multiple files.

Fix dotnet/coreclr#4040

Signed-off-by: MyungJoo Ham <myungjoo.ham@samsung.com>
Commit migrated from https://github.com/dotnet/coreclr/commit/d1ca1bb08ef948047ec958b9c41ce7e840b47bcc

Merge pull request dotnet/coreclr#4260 from myungjoo/fix/4259

ARM: fix build warning for unw usage

Commit migrated from https://github.com/dotnet/coreclr/commit/6ccefb7afd1c3fd96caf3d6694d6e9441c36362b

Fix assertion failure on ARM

StompWriteBarrierEphemeral may be called on the init path, where the runtime is technically not suspended, but has not started yet. Added a check for g_fEEInit in the call.

Commit migrated from https://github.com/dotnet/coreclr/commit/faa782a20b738a9c9921bf54c29c229f4078748d

Merge pull request dotnet/coreclr#4340 from jkotas/equality-comparer

Use beforefieldinit field for Comparer/EqualityComparer.Default

Commit migrated from https://github.com/dotnet/coreclr/commit/d5abe2f1cbfe7c5a57bfed96ab3631671b6f82a2

Merge pull request dotnet/coreclr#4353 from myungjoo/fix/4107

ARM/Linux: Mark r0-r3 Saved

Commit migrated from https://github.com/dotnet/coreclr/commit/4835b092da28cdf468940bc8f28e6340e34383cd

ARM/Linux: Mark r0-r3 Saved

Without this, exception handlers (try-catch) that
try to get SP of ThePreStub's caller (managed frame) mislocate
the caller's SP by 4 words (0x10) and get lost while
traversing managed frames.

Fix dotnet/coreclr#4107

Signed-off-by: MyungJoo Ham <myungjoo.ham@samsung.com>
Commit migrated from https://github.com/dotnet/coreclr/commit/f97d3b2c2ff27f421c3b0bb5565f262314fe8880

Merge pull request dotnet/coreclr#4343 from pgavlin/SeparateBitPosition

Move `BitPosition` into its own file.

Commit migrated from https://github.com/dotnet/coreclr/commit/cb9cbef5cd036bb7617202262908f358a46b47f8

Fix razzle build breaks in bcl.win

[tfs-changeset: 1596379]

Commit migrated from https://github.com/dotnet/coreclr/commit/680663e8a5783e0bac250293df8157057b1b7cf0

Style fix: remove obsolete contents

We no longer have StartUnwindingNativeFrames.

Signed-off-by: MyungJoo Ham <myungjoo.ham@samsung.com>
Commit migrated from https://github.com/dotnet/coreclr/commit/540167de19398a0cf7c4a14b6e7b7f808ca8d808

Use beforefieldinit field for Comparer/EqualityComparer.Default

Commit migrated from https://github.com/dotnet/coreclr/commit/33951091ce4bc7752195cf1364da14cf200c2932

Merge pull request dotnet/coreclr#4326 from dotnet-bot/from-tfs

Merge changes from TFS

Commit migrated from https://github.com/dotnet/coreclr/commit/b0d613888c6c1b78add096a0832ba6ae7928f56c

Merge pull request dotnet/coreclr#4335 from AndyAyersMS/InlineStrategy

Inliner: introducing InlineStrategy

Commit migrated from https://github.com/dotnet/coreclr/commit/298a5d159453254dc1cb9719c56f03f98fb46213

Removing NYI for ZapUnwindData

Commit migrated from https://github.com/dotnet/coreclr/commit/ff127a84a709e239488e21e57e82c0a25b2b14e8

Make it possible to build JIT32 in the OSS tree.

This change adds a new argument to build.cmd, buildjit32, that configures
the build to build and link JIT32 instead of RyuJIT if the sources are
available in `src/jit32`.

Commit migrated from https://github.com/dotnet/coreclr/commit/a3bb6a066eae8a7daede52ed576e8cd8d1d50780

Merge pull request dotnet/coreclr#4339 from fadimounir/deltests

Delete fragile tests (will fix tests in a later PR)

Commit migrated from https://github.com/dotnet/coreclr/commit/c264f882479d50bcbb96b965bac99ce16fa5588f

Delete fragile tests (will fix tests in a later PR)

Commit migrated from https://github.com/dotnet/coreclr/commit/5c6581b713656d07a0887dbbf6dc9c1536d36aae

Move `BitPosition` into its own file.

This will allow the GC info encoder and the JIT to use this
function without pulling in the entire utilcode header.

Commit migrated from https://github.com/dotnet/coreclr/commit/d0b6a85c895b4102ff849ffc0d276b6af8c63bb0

Inliner: introducing InlineStrategy

Create the `InlineStrategy` class to hold inline-relevant data that
spans multiple inlines. It tracks the number of inline candidates,
attempts, successes, last successful policy, and holds onto the root
context, and so on. The strategy is responsible for creating contexts
and reporting overall results for a method (either tree-based or
data-based).

The strategy also includes a simple jit time estimate. From various
observations, post-inline jit time can be modelled acceptably by simple
linear relationships on the input IL size. The strategy uses these models
to estimate the initial and current jit time. Estimate units are roughly
microseconds.

The strategy creates a time budget to flag cases where the estimated
jit time increase due to inlining is unreasonbly large. The budget
is initially based on the root method size, and may increase if there
are non-discretionary force inlines.

Once we have a bit more vetting of the budgeting mechanism, policies
will use it to limit inlining in a small number of runaway inlining cases
(see for example dotnet/coreclr#2472).

Remove code under MEASURE_INLINING since the strategy plus the context
tree (optionally extended via policies) contains all that data and more.
Likewise, consolidate a number of the compiler's inlining-related member
variables into the strategy.

Commit migrated from https://github.com/dotnet/coreclr/commit/c56da07ffe047d36daca4b152aaf6cd1a27b3ee8

Merge pull request dotnet/coreclr#4330 from janvorli/fix-sigsegv-deadlock

Fix possibility of deadlock in the SIGSEGV handler

Commit migrated from https://github.com/dotnet/coreclr/commit/08e1b2f05ba15efff366c4fd70ff475359022bb3

Fix full framework build break

[tfs-changeset: 1596259]

Commit migrated from https://github.com/dotnet/coreclr/commit/9d5dce0e913685a03fd7ce665fa221cdea94373e

Merge pull request dotnet/coreclr#4322 from pgavlin/TlsLogEnv

Collect the JIT's TLS variables in a single type.

Commit migrated from https://github.com/dotnet/coreclr/commit/e63de4a0d1dd9c5ad840495579c5437a0095bea1

Merge pull request dotnet/coreclr#4314 from pgavlin/GcInfoSList

Replace `SList` in the GC info encoders.

Commit migrated from https://github.com/dotnet/coreclr/commit/0d912695f7bd133c91f8b4e303b1b6b03c728869

Fix potential deadlock when calling ExecutionManager::IsManagedCode

The function can deadlock if the calling thread was holding the
ExecutionManager writer lock.

Commit migrated from https://github.com/dotnet/coreclr/commit/a5b5d2f00993872e61c764e2a777f568cc5a8ba3

Merge pull request dotnet/coreclr#4308 from joperezr/RemoveWarnings

Remove native build warnings

Commit migrated from https://github.com/dotnet/coreclr/commit/19f4fdc3eb161aca2541603282090448bcf7268f

Updating BuildTools

Commit migrated from https://github.com/dotnet/coreclr/commit/b2f571bc74b44778cbe1ca1b4f95f3217bf2265a

Merge pull request dotnet/coreclr#4327 from RussKeldorph/structinregs

Fix structinregs test on x86

Commit migrated from https://github.com/dotnet/coreclr/commit/af0a58fb1d34ba27b7b761d71316a2c2d0361a0f

Fix possibility of deadlock in the SIGSEGV handler

The SIGSEGV handler was transitively calling pthread_attr_get_np to
get current stack limit no matter where the exception happened. The
problem was that if the segmentation violation happened in a C
runtime function, this could lead to deadlock since pthread_attr_get_np
is not signal safe.

The fix is to add callback that will figure out if the failing instruction
was in managed code or in one of the jit helpers and if not, it would
not attempt to handle the signal.

I have also removed non signal safe calls from the signal handlers code
path where we don't know yet whether the interrupted code was in a function
that could collide with a function that we call from the signal handler
or not. This includes TRACE and ASSERT calls that were calling string
formatting functions.

Commit migrated from https://github.com/dotnet/coreclr/commit/c240f969e0f43ee25f9590f7e53676e4fd7bd85d

Fix structinregs test on x86

Fix a typo in _MSC_VER resulting in a mismatched calling convention on
x86.  While I'm in here, I'm also fixing some benign mismatched function
pointer type definitions.

Commit migrated from https://github.com/dotnet/coreclr/commit/7c512edb6008675ff1db320dbefe43c287c423dd

Add back Path APIs needed by UWP

[tfs-changeset: 1596013]

Commit migrated from https://github.com/dotnet/coreclr/commit/7b30429f7ed5091889113baf31c727979573262a

Merge pull request dotnet/coreclr#4297 from tijoytom/master

Disabling the failing struct by value scenario.

Commit migrated from https://github.com/dotnet/coreclr/commit/bd7ee6206f05fbc321e7f69383423f05d440e7b6

Collect the JIT's TLS variables in a single type.

Instead of storing pointers to the thread-local compiler instance
and the current logging environment in separate TLS slots, wrap
these values in a struct and store a pointer to the struct in a
single TLS slot. This simplifies and standardizes the JIT's interface
to its TLS storage, especially when it is being statically linked
into another program or library that cannot use standard TLS.

Note that for release builds, the logging environment is not used
and a pointer to the current compiler instance is stored directly
into the JIT's TLS slot as an implementation detail of the TLS
wrapper type.

Commit migrated from https://github.com/dotnet/coreclr/commit/aba977ee03f85f059aca1bdb0b0e1202f25d04cd

Merge pull request dotnet/coreclr#4320 from mmitche/add-reporting

Add reporting functionality to the coreclr netci file

Commit migrated from https://github.com/dotnet/coreclr/commit/dc86158d1ce41dfcb775c921a9e6d1f7fed90868

Add reporting functionality to the coreclr netci file

Also eliminate a few jobs that aren't being referenced.

Commit migrated from https://github.com/dotnet/coreclr/commit/8614810caec4b5a2a33547fe3f9dfd3982357b6e

Merge pull request dotnet/coreclr#4319 from mmitche/archive-needed

Only archive dylib and .so files from the native coreclr tests

Commit migrated from https://github.com/dotnet/coreclr/commit/deadffbd21fde9706e3237969208f995928cd843

Only archive dylib and .so files from the native coreclr tests

Avoids a few hundred extra files

Commit migrated from https://github.com/dotnet/coreclr/commit/257951f3a30b880d863c813bf5528fef5f44fdea

Disabling the failing struct by value scenario.

Commit migrated from https://github.com/dotnet/coreclr/commit/a207199a67acee162c0ed865fa70252add2dccef

Merge pull request dotnet/coreclr#4068 from Lucrecious/master

Generate map files for symbol resolution for Linux native images on PerfView

Commit migrated from https://github.com/dotnet/coreclr/commit/0ec739e4416d12eeaac0c365fae09e503b080eaf