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[lldb] Fix circular dependency and deadlock in scripted frame providers (#187411)

When a scripted frame provider calls back into the thread's frame
machinery (e.g. via HandleCommand or EvaluateExpression), two problems
arise:

1. GetStackFrameList() re-enters the SyntheticStackFrameList
 construction, causing infinite recursion.
2. ClearStackFrames() tries to read-lock the StackFrameList's
 shared_mutex that is already write-locked by GetFramesUpTo,
 causing a deadlock.

This patch fixes those issues by tracking when a provider is actively
fetching frames via a per-host-thread map (m_provider_frames_by_thread)
keyed by HostThread. The map is pushed/popped in
SyntheticStackFrameList::FetchFramesUpTo before calling into the
provider. GetStackFrameList() checks it to route re-entrant calls:

- The provider's own host thread gets the parent frame list, preventing

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[NFC] [HWASan] do not place `STATISTIC` in the middle of the opts (#188634)

   doc: Updated parallel/openmp to 20.1.8

   openmp: update to 20.1.8.

   Part of the llvm update.

[IR] Make succ_iterator compliant with C++20 (#188601)

GCC 15.2 enforces the `DefaultConstructible` requirement for
`std::reverse_iterator<llvm::succ_iterator>` causing LLVM to fail to
build with C++20 (see https://discourse.llvm.org/t/suspicious-usages-of-std-reverse-iterator-and-associated-llvm-build-failures-with-gcc-15-2-1/89426, issue #182417).

```
$ cmake -G Ninja -S llvm -B llvm/build \
    -DCMAKE_INSTALL_PREFIX=$(mktemp -d) \
    -DCMAKE_BUILD_TYPE=Release \
    -DCMAKE_C_COMPILER=gcc \
    -DCMAKE_CXX_COMPILER=g++ \
    -DLLVM_ENABLE_PROJECTS="clang;" \
    -DLLVM_ENABLE_ASSERTIONS=ON \
    -DLLVM_USE_LINKER=lld \
    -DCMAKE_CXX_STANDARD=20 \
    -DLLVM_OPTIMIZED_TABLEGEN=ON \
    -DLLVM_PARALLEL_LINK_JOBS=4


    [10 lines not shown]

HBSD: Resolve merge conflict

Signed-off-by:  Shawn Webb <shawn.webb at hardenedbsd.org>

Merge remote-tracking branch 'origin/freebsd/current/main' into hardened/current/master

Conflicts:
        stand/defs.mk (unresolved)

   doc: restore accidentally deleted nss update line

   doc: Updated parallel/spirv-tools to 2025.5

   spirv-tools: update to 2025.5.

   Fixes build with llvm 20.

   doc: Updated parallel/spirv-llvm-translator to 20.1.10

   spirv-llvm-translator: update to 20.1.10.

   Fixes build with llvm 20.

   doc: Updated parallel/spirv-headers to 1.4.335.0

   spirv-headers: update to 1.4.335.0.

   Fixes build with llvm 20.

   doc: Updated parallel/opencl-clang to 20.1.2

   opencl-clang: update to 20.1.2.

   Fixes build with llvm 20.

   doc: Updated lang/zig to 0.15.2

   zig: update to 0.15.2.

   Fixes build with llvm 20.

   doc: Updated devel/py-llvmlite to 0.46.0

   py-llvmlite: update to 0.46.0.

   Fixes build with llvm 20.

libclc: Use prefetch builtin to implement default prefetch (#188491)

   doc: Updated devel/include-what-you-use to 0.24

libclc: Fix directly adding vector booleans (#188540)

Vector compares return -1 instead of 1, so explicitly select a 0 or 1
instead of directly adding the result.

   include-what-you-use: update to 0.24.

   Fixes build with llvm 20.

   doc: Updated devel/cvise to 2.12.0

   cvise: update to 2.12.0.

   Fixes build with llvm 20.

libclc: Fix amdgpu sub_group_broadcast for double (#188594)

   doc: mention updates of llvm and friends

   llvm and friends: update to to 20.1.8

   Based on the wip packages and help from adam@

   doc: Updated meta-pkgs/xfce4 to 4.20.0nb15