Abseil LTS branch, March 2021

Abseil LTS 20210324.0

What's New:

• The cleanup library has been released. This library contains the control-flow-construct-like type absl::Cleanup which is used for executing a callback on scope exit.
• The numeric library now includes bits.h, a polyfill header containing implementations of C++20's bitwise math functions.
• Abseil now installs pkg-config files to make it easier to use Abseil with some other build systems.
• Abseil now respects the default CMake installation paths. Standard CMake variables like CMAKE_INSTALL_PREFIX can be used to change the installation path.

Breaking Changes:

• The empty absl::container target has been removed from the CMake build. This target had no effect and references to this target in user code can safely be removed.

Baseline: 997aaf3

Abseil LTS branch, Sept 2020, Patch 3

Abseil LTS 20200923, Patch 3

What's New:

• absl::StatusOr<T> has been released. See our blog
  post for more information.
• Abseil Flags reflection interfaces have been released.
• Abseil Flags memory usage has been significantly optimized.
• Abseil now supports a "hardened" build mode. This build mode enables
  runtime checks that guard against programming errors that may lead
  to security vulnerabilities.

Notable Fixes:

• Sanitizer dynamic annotations like AnnotateRWLockCreate that are
  also defined by the compiler sanitizer implementation are no longer
  also defined by Abseil.
• Sanitizer macros are now prefixed with ABSL_ to avoid naming collisions.
• Sanitizer usage is now automatically detected and no longer requires
  macros like ADDRESS_SANITIZER to be defined on the command line.

Breaking Changes:

• Abseil no longer contains a dynamic_annotations library. Users
  using a supported build system (Bazel or CMake) are unaffected by
  this, but users manually specifying link libraries may get an error
  about a missing linker input.

Baseline: 7680a5f
Cherry pick: bd0de71 (Patch 1)
Cherry pick: 0f3bb46 (Patch 2)
Cherry pick: 6f9d96a (Patch 3)

Abseil LTS branch, Sept 2020, Patch 2

Abseil LTS 20200923, Patch 2

What's New:

• absl::StatusOr<T> has been released. See our blog
  post for more information.
• Abseil Flags reflection interfaces have been released.
• Abseil Flags memory usage has been significantly optimized.
• Abseil now supports a "hardened" build mode. This build mode enables
  runtime checks that guard against programming errors that may lead
  to security vulnerabilities.

Notable Fixes:

• Sanitizer dynamic annotations like AnnotateRWLockCreate that are
  also defined by the compiler sanitizer implementation are no longer
  also defined by Abseil.
• Sanitizer macros are now prefixed with ABSL_ to avoid naming collisions.
• Sanitizer usage is now automatically detected and no longer requires
  macros like ADDRESS_SANITIZER to be defined on the command line.

Breaking Changes:

• Abseil no longer contains a dynamic_annotations library. Users
  using a supported build system (Bazel or CMake) are unaffected by
  this, but users manually specifying link libraries may get an error
  about a missing linker input.

Baseline: 7680a5f
Cherry pick: bd0de71 (Patch 1)
Cherry pick: 0f3bb46 (Patch 2)

Abseil LTS branch, Sept 2020, Patch 1

Abseil LTS 20200923, Patch 1

What's New:

• absl::StatusOr<T> has been released. See our blog
  post for more information.
• Abseil Flags reflection interfaces have been released.
• Abseil Flags memory usage has been significantly optimized.
• Abseil now supports a "hardened" build mode. This build mode enables
  runtime checks that guard against programming errors that may lead
  to security vulnerabilities.

Notable Fixes:

• Sanitizer dynamic annotations like AnnotateRWLockCreate that are
  also defined by the compiler sanitizer implementation are no longer
  also defined by Abseil.
• Sanitizer macros are now prefixed with ABSL_ to avoid naming collisions.
• Sanitizer usage is now automatically detected and no longer requires
  macros like ADDRESS_SANITIZER to be defined on the command line.

Breaking Changes:

• Abseil no longer contains a dynamic_annotations library. Users
  using a supported build system (Bazel or CMake) are unaffected by
  this, but users manually specifying link libraries may get an error
  about a missing linker input.

Baseline: 7680a5f
Cherry picks: bd0de71 (Patch 1)

Abseil LTS branch, Feb 2020, Patch 3

Adds bounds-checking to the second range of absl container algorithms…

… (#811)

The APIs for the two-range `absl::c_mismatch`, `absl::c_swap_ranges`,
and `absl::c_transform` are misleading as they do not check the bounds
of the second range against the first one.

This commit cleans up ensures that buggy calls are not exploitable;
non-buggy calls are unaffected.

This is consistent with both C++14's two-range `std::` equivalents and
C++20's `std::ranges::` equivalents.
http://wg21.link/mismatch
http://wg21.link/alg.swap
http://wg21.link/alg.transform

Abseil LTS branch, Aug 2019, Patch 1

Adds bounds-checking to the second range of absl container algorithms…

… (#812)

The APIs for the two-range `absl::c_mismatch`, `absl::c_swap_ranges`,
and `absl::c_transform` are misleading as they do not check the bounds
of the second range against the first one.

This commit cleans up ensures that buggy calls are not exploitable;
non-buggy calls are unaffected.

This is consistent with both C++14's two-range `std::` equivalents and
C++20's `std::ranges::` equivalents.
http://wg21.link/mismatch
http://wg21.link/alg.swap
http://wg21.link/alg.transform

Abseil LTS branch, Dec 2018, Patch 1

Adds bounds-checking to the second range of absl container algorithms…

… (#813)

The APIs for the two-range `absl::c_mismatch`, `absl::c_swap_ranges`,
and `absl::c_transform` are misleading as they do not check the bounds
of the second range against the first one.

This commit cleans up ensures that buggy calls are not exploitable;
non-buggy calls are unaffected.

This is consistent with both C++14's two-range `std::` equivalents and
C++20's `std::ranges::` equivalents.
http://wg21.link/mismatch
http://wg21.link/alg.swap
http://wg21.link/alg.transform

Abseil LTS branch, Sept 2020

Abseil LTS 20200923

What's New:

• absl::StatusOr<T> has been released. See our blog
  post for more information.
• Abseil Flags reflection interfaces have been released.
• Abseil Flags memory usage has been significantly optimized.
• Abseil now supports a "hardened" build mode. This build mode enables
  runtime checks that guard against programming errors that may lead
  to security vulnerabilities.

Notable Fixes:

• Sanitizer dynamic annotations like AnnotateRWLockCreate that are
  also defined by the compiler sanitizer implementation are no longer
  also defined by Abseil.
• Sanitizer macros are now prefixed with ABSL_ to avoid naming collisions.
• Sanitizer usage is now automatically detected and no longer requires
  macros like ADDRESS_SANITIZER to be defined on the command line.

Breaking Changes:

• Abseil no longer contains a dynamic_annotations library. Users
  using a supported build system (Bazel or CMake) are unaffected by
  this, but users manually specifying link libraries may get an error
  about a missing linker input.

Baseline: 7680a5f
Cherry picks: None

Abseil LTS branch, Feb 2020, Patch 2

This release fixes the list of dependencies of absl::Cord in the CMake build.

Abseil LTS branch, Feb 2020, Patch 1

Patched Feb 2020 LTS branch with the bug fix for absl::Status::ErasePayload.