https://gcc.gnu.org/bugzilla/show_bug.cgi?id=84208
--- Comment #4 from Akhilesh Kumar ---
Please find Patch and test Case
I tried but unable to attached patch as Attachment :(
My Changes for address-use-after-scope which is working for X86 but not for ARM
target
---
gcc/asan.c | 302 ++--
gcc/asan.h | 66 ++--
gcc/cfgexpand.c | 18 +---
gcc/common.opt | 3 +
gcc/dbgcnt.def | 1 +
gcc/doc/invoke.texi | 15 ++-
gcc/gimple.c| 3 +
gcc/gimple.h| 9 ++
gcc/gimplify.c | 236 +---
gcc/internal-fn.c | 9 ++
gcc/internal-fn.def | 1 +
gcc/opts.c | 27 -
gcc/params.def | 6 ++
gcc/params.h| 2 +
gcc/sanitizer.def | 5 +-
gcc/sanopt.c| 3 +
16 files changed, 607 insertions(+), 99 deletions(-)
diff --git a/gcc/asan.c b/gcc/asan.c
index 0775fc1..089fb7a 100644
--- a/gcc/asan.c
+++ b/gcc/asan.c
@@ -243,6 +243,22 @@ static unsigned HOST_WIDE_INT asan_shadow_offset_value;
static bool asan_shadow_offset_computed;
static vec sanitized_sections;
+/* Return true if STMT is ASAN_MARK poisoning internal function call. */
+static inline bool
+asan_mark_poison_p (gimple *stmt)
+{
+ return (gimple_call_internal_p (stmt, IFN_ASAN_MARK)
+ && tree_to_uhwi (gimple_call_arg (stmt, 0)) == ASAN_MARK_CLOBBER);
+
+}
+
+/* Set of variable declarations that are going to be guarded by
+ use-after-scope sanitizer. */
+
+static hash_set *asan_handled_variables = NULL;
+
+hash_set *asan_used_labels = NULL;
+
/* Sets shadow offset to value in string VAL. */
bool
@@ -285,6 +301,14 @@ set_sanitized_sections (const char *sections)
}
}
+bool
+asan_sanitize_stack_p (void)
+{
+ return ((flag_sanitize & SANITIZE_ADDRESS)
+ && ASAN_STACK
+ && !asan_no_sanitize_address_p ());
+}
+
/* Checks whether section SEC should be sanitized. */
static bool
@@ -313,22 +337,13 @@ asan_shadow_offset ()
alias_set_type asan_shadow_set = -1;
-/* Pointer types to 1 resp. 2 byte integers in shadow memory. A separate
+/* Pointer types to 1, 2 or 4 byte integers in shadow memory. A separate
alias set is used for all shadow memory accesses. */
-static GTY(()) tree shadow_ptr_types[2];
+static GTY(()) tree shadow_ptr_types[3];
/* Decl for __asan_option_detect_stack_use_after_return. */
static GTY(()) tree asan_detect_stack_use_after_return;
-/* Various flags for Asan builtins. */
-enum asan_check_flags
-{
- ASAN_CHECK_STORE = 1 << 0,
- ASAN_CHECK_SCALAR_ACCESS = 1 << 1,
- ASAN_CHECK_NON_ZERO_LEN = 1 << 2,
- ASAN_CHECK_LAST = 1 << 3
-};
-
/* Hashtable support for memory references used by gimple
statements. */
@@ -931,12 +946,16 @@ static void
asan_init_shadow_ptr_types (void)
{
asan_shadow_set = new_alias_set ();
- shadow_ptr_types[0] = build_distinct_type_copy (signed_char_type_node);
- TYPE_ALIAS_SET (shadow_ptr_types[0]) = asan_shadow_set;
- shadow_ptr_types[0] = build_pointer_type (shadow_ptr_types[0]);
- shadow_ptr_types[1] = build_distinct_type_copy (short_integer_type_node);
- TYPE_ALIAS_SET (shadow_ptr_types[1]) = asan_shadow_set;
- shadow_ptr_types[1] = build_pointer_type (shadow_ptr_types[1]);
+ tree types[3] = { signed_char_type_node, short_integer_type_node,
+ integer_type_node };
+
+ for (unsigned i = 0; i < 3; i++)
+{
+ shadow_ptr_types[i] = build_distinct_type_copy (types[i]);
+ TYPE_ALIAS_SET (shadow_ptr_types[i]) = asan_shadow_set;
+ shadow_ptr_types[i] = build_pointer_type (shadow_ptr_types[i]);
+}
+
initialize_sanitizer_builtins ();
}
@@ -1020,6 +1039,15 @@ asan_function_start (void)
current_function_funcdef_no);
}
+/* Return number of shadow bytes that are occupied by a local variable
+ of SIZE bytes. */
+
+static unsigned HOST_WIDE_INT
+shadow_mem_size (unsigned HOST_WIDE_INT size)
+{
+ return ROUND_UP (size, ASAN_SHADOW_GRANULARITY) / ASAN_SHADOW_GRANULARITY;
+}
+
/* Insert code to protect stack vars. The prologue sequence should be emitted
directly, epilogue sequence returned. BASE is the register holding the
stack base, against which OFFSETS array offsets are relative to, OFFSETS
@@ -1047,7 +1075,7 @@ asan_emit_stack_protection (rtx base, rtx pbase, unsigned
int alignb,
HOST_WIDE_INT base_offset = offsets[length - 1];
HOST_WIDE_INT base_align_bias = 0, offset, prev_offset;
HOST_WIDE_INT asan_frame_size = offsets[0] - base_offset;
- HOST_WIDE_INT last_offset, last_size;
+ HOST_WIDE_INT last_offset;
int l;
unsigned char cur_shadow_byte = ASAN_STACK_MAGIC_LEFT;
tree str_cst, decl, id;
@@ -1222,10 +1250,10 @@ asan_emit_stack_protection (rtx base, rtx pbase,
unsigned int alignb,
(aoff - prev_offset)
>> ASAN_SHADOW_SHIFT);
prev_offset = aoff;
- for (i = 0; i <
