Add address sanitizer support for Visual Studio.

docs/markdown/Builtin-options.md

@@ -138,7 +138,9 @@ available on all platforms or with all compilers:
 | b_vscrt       | from_buildtype | none, md, mdd, mt, mtd, from_buildtype, static_from_buildtype    | VS runtime library to use (since 0.48.0) (static_from_buildtype since 0.56.0) |
 
 The value of `b_sanitize` can be one of: `none`, `address`, `thread`,
-`undefined`, `memory`, `address,undefined`.
+`undefined`, `memory`, `address,undefined`, but note that some
+compilers might not support all of them. For example Visual Studio
+only supports the address sanitizer.
 
 * < 0 means disable, == 0 means automatic selection, > 0 sets a specific number to use
 

docs/markdown/snippets/vsasan.md

@@ -0,0 +1,6 @@
+## Address sanitizer support for Visual Studio
+
+The `b_sanitize` option for enabling Address sanitizer now works with
+the Visual Studio compilers. This requires [a sufficiently new version
+of Visual
+Studio](https://devblogs.microsoft.com/cppblog/address-sanitizer-for-msvc-now-generally-available/).

mesonbuild/compilers/cpp.py

@@ -663,7 +663,6 @@ class VisualStudioCPPCompiler(CPP11AsCPP14Mixin, VisualStudioLikeCPPCompilerMixi
         CPPCompiler.__init__(self, exelist, version, for_machine, is_cross,
                              info, exe_wrapper, linker=linker, full_version=full_version)
         MSVCCompiler.__init__(self, target)
-        self.base_options = {OptionKey(o) for o in ['b_pch', 'b_vscrt', 'b_ndebug']} # FIXME add lto, pgo and the like
         self.id = 'msvc'
 
     def get_options(self) -> 'KeyedOptionDictType':

mesonbuild/compilers/mixins/visualstudio.py

@@ -125,6 +125,8 @@ class VisualStudioLikeCompiler(Compiler, metaclass=abc.ABCMeta):
             self.machine = 'arm'
         else:
             self.machine = target
+        if mesonlib.version_compare(self.version, '>=19.29.29917'):
+            self.base_options.add(mesonlib.OptionKey('b_sanitize'))
         assert self.linker is not None
         self.linker.machine = self.machine
 
@@ -159,6 +161,13 @@ class VisualStudioLikeCompiler(Compiler, metaclass=abc.ABCMeta):
     def get_no_optimization_args(self) -> T.List[str]:
         return ['/Od']
 
+    def sanitizer_compile_args(self, value: str) -> T.List[str]:
+        if value == 'none':
+            return []
+        if value != 'address':
+            raise mesonlib.MesonException('VS only supports address sanitizer at the moment.')
+        return ['/fsanitize=address']
+
     def get_output_args(self, target: str) -> T.List[str]:
         if target.endswith('.exe'):
             return ['/Fe' + target]