https://gcc.gnu.org/g:e89b5ed62a5a06fb8918ffa1616f0f37c8d359c3
commit r12-10388-ge89b5ed62a5a06fb8918ffa1616f0f37c8d359c3 Author: Richard Biener <rguent...@suse.de> Date: Thu Mar 21 08:30:39 2024 +0100 tree-optimization/111736 - avoid address sanitizing of __seg_gs The following more thoroughly avoids address sanitizing accesses to non-generic address-spaces. PR tree-optimization/111736 * asan.cc (instrument_derefs): Do not instrument accesses to non-generic address-spaces. * gcc.target/i386/pr111736.c: New testcase. (cherry picked from commit 134ef2a8cac1a5cc718739bd7d3b3472947c80d6) Diff: --- gcc/asan.cc | 4 ++++ gcc/testsuite/gcc.target/i386/pr111736.c | 23 +++++++++++++++++++++++ 2 files changed, 27 insertions(+) diff --git a/gcc/asan.cc b/gcc/asan.cc index 0c5afa36cb8..24cf2b8376b 100644 --- a/gcc/asan.cc +++ b/gcc/asan.cc @@ -2712,6 +2712,10 @@ instrument_derefs (gimple_stmt_iterator *iter, tree t, if (VAR_P (inner) && DECL_HARD_REGISTER (inner)) return; + /* Accesses to non-generic address-spaces should not be instrumented. */ + if (!ADDR_SPACE_GENERIC_P (TYPE_ADDR_SPACE (TREE_TYPE (inner)))) + return; + poly_int64 decl_size; if ((VAR_P (inner) || TREE_CODE (inner) == RESULT_DECL) && offset == NULL_TREE diff --git a/gcc/testsuite/gcc.target/i386/pr111736.c b/gcc/testsuite/gcc.target/i386/pr111736.c new file mode 100644 index 00000000000..231fdd07e80 --- /dev/null +++ b/gcc/testsuite/gcc.target/i386/pr111736.c @@ -0,0 +1,23 @@ +/* { dg-do compile } */ +/* { dg-options "-O2 -fsanitize=address" } */ + +int __seg_gs m; + +int foo (void) +{ + return m; +} + +extern int __seg_gs n; + +int bar (void) +{ + return n; +} + +int baz (int __seg_gs *o) +{ + return *o; +} + +/* { dg-final { scan-assembler-not "asan_report_load" } } */