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Sat, 21 Sep 2019 13:31:51 +0200 From: Kamil Rytarowski To: gcc-patches@gcc.gnu.org Cc: dvyukov@google.com, kcc@google.com, vitalybuka@google.com, jakub@redhat.com, Kamil Rytarowski Subject: [PATCH] Add new builtin __SANITIZE_UNDEFINED__ macros for fsanitize=undefined switch Date: Sat, 21 Sep 2019 13:31:10 +0200 Message-Id: <20190921113110.14188-1-n54@gmx.com> MIME-Version: 1.0 X-IsSubscribed: yes GCC version of https://reviews.llvm.org/D52386 2019-09-21 Kamil Rytarowski * cppbuiltin.c (define_builtin_macros_for_compilation_flags): Add new builtin __SANITIZE_UNDEFINED__ macros for fsanitize=undefined switch. * doc/cpp.texi: Document new macros. * c-c++-common/lsan/sanitize-undefined-macro.c: New test. --- gcc/ChangeLog | 6 ++++++ gcc/cppbuiltin.c | 3 +++ gcc/doc/cpp.texi | 3 +++ gcc/testsuite/ChangeLog | 4 ++++ .../c-c++-common/ubsan/sanitize-ubsan-macro.c | 12 ++++++++++++ 5 files changed, 28 insertions(+) create mode 100644 gcc/testsuite/c-c++-common/ubsan/sanitize-ubsan-macro.c -- 2.23.0 diff --git a/gcc/ChangeLog b/gcc/ChangeLog index 7b773167433..4f99190ca0c 100644 --- a/gcc/ChangeLog +++ b/gcc/ChangeLog @@ -1,3 +1,9 @@ +2019-09-21 Kamil Rytarowski + + * cppbuiltin.c (define_builtin_macros_for_compilation_flags): Add new + builtin __SANITIZE_UNDEFINED__ macros for fsanitize=undefined switch. + * doc/cpp.texi: Document new macros. + 2019-09-20 Jonas Pfeil * config/microblaze/microblaze.h (ASM_OUTPUT_SKIP): Use diff --git a/gcc/cppbuiltin.c b/gcc/cppbuiltin.c index 60e5bedc366..221fb68b575 100644 --- a/gcc/cppbuiltin.c +++ b/gcc/cppbuiltin.c @@ -93,6 +93,9 @@ define_builtin_macros_for_compilation_flags (cpp_reader *pfile) if (flag_sanitize & SANITIZE_ADDRESS) cpp_define (pfile, "__SANITIZE_ADDRESS__"); + if (flag_sanitize & SANITIZE_UNDEFINED) + cpp_define (pfile, "__SANITIZE_UNDEFINED__"); + if (flag_sanitize & SANITIZE_THREAD) cpp_define (pfile, "__SANITIZE_THREAD__"); diff --git a/gcc/doc/cpp.texi b/gcc/doc/cpp.texi index f2de39a270c..3145d3ebab4 100644 --- a/gcc/doc/cpp.texi +++ b/gcc/doc/cpp.texi @@ -2359,6 +2359,9 @@ in use. This macro is defined, with value 1, when @option{-fsanitize=address} or @option{-fsanitize=kernel-address} are in use. +@item __SANITIZE_UNDEFINED__ +This macro is defined, with value 1, when @option{-fsanitize=undefined} is in use. + @item __SANITIZE_THREAD__ This macro is defined, with value 1, when @option{-fsanitize=thread} is in use. diff --git a/gcc/testsuite/ChangeLog b/gcc/testsuite/ChangeLog index 05c25ee28ce..e35880b1b2f 100644 --- a/gcc/testsuite/ChangeLog +++ b/gcc/testsuite/ChangeLog @@ -1,3 +1,7 @@ +2019-09-21 Kamil Rytarowski + + * c-c++-common/usan/sanitize-undefined-macro.c: New test. + 2019-09-20 Iain Sandoe * gcc.target/i386/naked-1.c: Alter options to use non- diff --git a/gcc/testsuite/c-c++-common/ubsan/sanitize-ubsan-macro.c b/gcc/testsuite/c-c++-common/ubsan/sanitize-ubsan-macro.c new file mode 100644 index 00000000000..ecca41da32e --- /dev/null +++ b/gcc/testsuite/c-c++-common/ubsan/sanitize-ubsan-macro.c @@ -0,0 +1,12 @@ +/* Check that -fsanitize=undefined options defines __SANITIZE_UNDEFINED__ macros. */ +/* { dg-do compile } */ +/* { dg-skip-if "" { *-*-* } { "*" } { "-O0" } } */ + +int +main () +{ +#ifndef __SANITIZE_UNDEFINED__ + bad construction +#endif + return 0; +}