[clang] [Basic] Enable __has_feature(leak_sanitizer)

Add a 'leak_sanitizer' feature akin to existing '*_sanitizer' features to let programmers switch code paths accounting for leak sanitizers being enabled. Differential Revision: https://reviews.llvm.org/D67719 llvm-svn: 372527
llvm · Sep 22, 2019 · 96f3526 · 96f3526
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commit 96f3526
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diff --git a/clang/include/clang/Basic/Features.def b/clang/include/clang/Basic/Features.def
@@ -39,6 +39,8 @@
 FEATURE(address_sanitizer,
         LangOpts.Sanitize.hasOneOf(SanitizerKind::Address |
                                    SanitizerKind::KernelAddress))
+FEATURE(leak_sanitizer,
+        LangOpts.Sanitize.has(SanitizerKind::Leak))
 FEATURE(hwaddress_sanitizer,
         LangOpts.Sanitize.hasOneOf(SanitizerKind::HWAddress |
                                    SanitizerKind::KernelHWAddress))

diff --git a/clang/test/Lexer/has_feature_leak_sanitizer.cpp b/clang/test/Lexer/has_feature_leak_sanitizer.cpp
@@ -0,0 +1,11 @@
+// RUN: %clang_cc1 -E -fsanitize=leak %s -o - | FileCheck --check-prefix=CHECK-LSAN %s
+// RUN: %clang_cc1 -E %s -o - | FileCheck --check-prefix=CHECK-NO-LSAN %s
+
+#if __has_feature(leak_sanitizer)
+int LeakSanitizerEnabled();
+#else
+int LeakSanitizerDisabled();
+#endif
+
+// CHECK-LSAN: LeakSanitizerEnabled
+// CHECK-NO-LSAN: LeakSanitizerDisabled