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| author | Richard Biener <rguenther@suse.de> | 2024-03-21 08:30:39 +0100 |
|---|---|---|
| committer | Richard Biener <rguenther@suse.de> | 2024-03-21 10:48:55 +0100 |
| commit | 134ef2a8cac1a5cc718739bd7d3b3472947c80d6 (patch) | |
| tree | 2f9b1148cc4bf9e18a44ce02a3df90a9d576a87e | |
| parent | 9d6ff6f1ea2ae7fc32ec9fbd0554fb06238ed045 (diff) | |
| download | gcc-134ef2a8cac1a5cc718739bd7d3b3472947c80d6.zip gcc-134ef2a8cac1a5cc718739bd7d3b3472947c80d6.tar.gz gcc-134ef2a8cac1a5cc718739bd7d3b3472947c80d6.tar.bz2 | |
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.
| -rw-r--r-- | gcc/asan.cc | 4 | ||||
| -rw-r--r-- | gcc/testsuite/gcc.target/i386/pr111736.c | 23 |
2 files changed, 27 insertions, 0 deletions
diff --git a/gcc/asan.cc b/gcc/asan.cc index cfe8310..7f91cc6 100644 --- a/gcc/asan.cc +++ b/gcc/asan.cc @@ -2755,6 +2755,10 @@ 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 diff --git a/gcc/testsuite/gcc.target/i386/pr111736.c b/gcc/testsuite/gcc.target/i386/pr111736.c new file mode 100644 index 0000000..231fdd0 --- /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" } } */ |