[sandbox] Port Mac to use the new sandbox_unittests

https://crrev.com/c/3719086 added sandbox_unittests in the upper level,
which covers all platforms. This cl is focusing on porting the
Mac-specific unit tests under the sandbox_unittests target and cleaning
up the naming to avoid platform-oriented target names.

Bug: 1297869
Change-Id: I6a7604a6a02bb2089e5b84c83a000be6fa26c384
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/3722196
Reviewed-by: Garrett Beaty <gbeaty@google.com>
Reviewed-by: Robert Sesek <rsesek@chromium.org>
Commit-Queue: Guocheng Wei <guochengwei@chromium.org>
Cr-Commit-Position: refs/heads/main@{#1019245}
GitOrigin-RevId: 8b839b3e88e2907677fcb73364c77146fd3860c7
2 files changed
tree: 64c386d5986b0b57d39f7809c3dfefe648086600
  1. linux/
  2. mac/
  3. policy/
  4. win/
  5. BUILD.gn
  7. constants.h
  8. DEPS
  10. features.cc
  11. features.gni
  12. features.h
  13. ipc.dict
  14. OWNERS
  15. README.md
  16. sandbox_export.h

Sandbox Library

This directory contains platform-specific sandboxing libraries. Sandboxing is a technique that can improve the security of an application by separating untrustworthy code (or code that handles untrustworthy data) and restricting its privileges and capabilities.

Each platform relies on the operating system's process primitive to isolate code into distinct security principals, and platform-specific technologies are used to implement the privilege reduction. At a high-level:

  • mac/ uses the Seatbelt sandbox. See the detailed design for more.
  • linux/ uses namespaces and Seccomp-BPF. See the detailed design for more.
  • win/ uses a combination of restricted tokens, distinct job objects, alternate desktops, and integrity levels. See the detailed design for more.

Built on top of the low-level sandboxing library is the //sandbox/policy component, which provides concrete policies and helper utilities for sandboxing specific Chromium processes and services. The core sandbox library cannot depend on the policy component.