Adding upstream version 86.0.1.upstream/86.0.1upstream

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

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+Sanitizer
+=========
+
+.. toctree::
+  :maxdepth: 1
+  :hidden:
+  :glob:
+
+  *
+
+**Address Sanitizer**
+
+Address Sanitizer (ASan) is a fast memory error detector that detects use-after-free and out-of-bound bugs in C/C++ programs. It uses a compile-time instrumentation to check all reads and writes during the execution. In addition, the runtime part replaces the malloc and free functions to check dynamically allocated memory.
+
+:ref:`More information <Address Sanitizer>`
+
+**Thread Sanitizer**
+
+Thread Sanitizer (TSan) is a fast data race detector for C/C++ programs. It uses a compile-time instrumentation to check all non-race-free memory access at runtime. Unlike other tools, it understands compiler-builtin atomics and synchronization and therefore provides very accurate results with no false positives (except if unsupported synchronization primitives like inline assembly or memory fences are used).
+
+:ref:`More information <Thread Sanitizer>`
+
+**Memory Sanitizer**
+
+Memory Sanitizer (MSan) is a fast detector used for uninitialized memory in C/C++ programs. It uses a compile-time instrumentation to ensure that all memory access at runtime uses only memory that has been initialized.
+
+:ref:`More information <Memory Sanitizer>`
+
+**ASan Nightly Project**
+
+The ASan Nightly Project involves building a Firefox Nightly browser with the popular AddressSanitizer tool and enhancing it with remote crash reporting capabilities for any errors detected.
+
+:ref:`More information <ASan Nightly>`