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c5e7f56249
Add "memtag" sanitizer that detects and mitigates stack memory issues using armv8.5 Memory Tagging Extension. It is similar in principle to HWASan, which is a software implementation of the same idea, but there are enough differencies to warrant a new sanitizer type IMHO. It is also expected to have very different performance properties. The new sanitizer does not have a runtime library (it may grow one later, along with a "debugging" mode). Similar to SafeStack and StackProtector, the instrumentation pass (in a follow up change) will be inserted in all cases, but will only affect functions marked with the new sanitize_memtag attribute. Reviewers: pcc, hctim, vitalybuka, ostannard Subscribers: srhines, mehdi_amini, javed.absar, kristof.beyls, hiraditya, cryptoad, steven_wu, dexonsmith, cfe-commits, llvm-commits Tags: #clang, #llvm Differential Revision: https://reviews.llvm.org/D64169 llvm-svn: 366123
38 lines
1.6 KiB
C++
38 lines
1.6 KiB
C++
// RUN: %clang_cc1 -std=c++11 -fsyntax-only -verify %s
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// RUN: not %clang_cc1 -std=c++11 -ast-dump %s | FileCheck --check-prefix=DUMP %s
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// RUN: not %clang_cc1 -std=c++11 -ast-print %s | FileCheck --check-prefix=PRINT %s
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int f1() __attribute__((no_sanitize)); // expected-error{{'no_sanitize' attribute takes at least 1 argument}}
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int f2() __attribute__((no_sanitize(1))); // expected-error{{'no_sanitize' attribute requires a string}}
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// DUMP-LABEL: FunctionDecl {{.*}} f3
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// DUMP: NoSanitizeAttr {{.*}} address
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// PRINT: int f3() __attribute__((no_sanitize("address")))
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int f3() __attribute__((no_sanitize("address")));
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// DUMP-LABEL: FunctionDecl {{.*}} f4
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// DUMP: NoSanitizeAttr {{.*}} thread
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// PRINT: int f4() {{\[\[}}clang::no_sanitize("thread")]]
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[[clang::no_sanitize("thread")]] int f4();
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// DUMP-LABEL: FunctionDecl {{.*}} f4
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// DUMP: NoSanitizeAttr {{.*}} hwaddress
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// PRINT: int f4() {{\[\[}}clang::no_sanitize("hwaddress")]]
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[[clang::no_sanitize("hwaddress")]] int f4();
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// DUMP-LABEL: FunctionDecl {{.*}} f5
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// DUMP: NoSanitizeAttr {{.*}} address thread hwaddress
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// PRINT: int f5() __attribute__((no_sanitize("address", "thread", "hwaddress")))
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int f5() __attribute__((no_sanitize("address", "thread", "hwaddress")));
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// DUMP-LABEL: FunctionDecl {{.*}} f6
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// DUMP: NoSanitizeAttr {{.*}} unknown
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// PRINT: int f6() __attribute__((no_sanitize("unknown")))
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int f6() __attribute__((no_sanitize("unknown"))); // expected-warning{{unknown sanitizer 'unknown' ignored}}
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// DUMP-LABEL: FunctionDecl {{.*}} f7
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// DUMP: NoSanitizeAttr {{.*}} memtag
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// PRINT: int f7() {{\[\[}}clang::no_sanitize("memtag")]]
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[[clang::no_sanitize("memtag")]] int f7();
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