@@ -1165,6 +1165,7 @@ asan_clear_shadow (rtx shadow_mem, HOST_
rtx_code_label *top_label;
rtx end, addr, tmp;
+ gcc_assert ((len & 3) == 0);
start_sequence ();
clear_storage (shadow_mem, GEN_INT (len), BLOCK_OP_NORMAL);
insns = get_insns ();
@@ -1178,7 +1179,6 @@ asan_clear_shadow (rtx shadow_mem, HOST_
return;
}
- gcc_assert ((len & 3) == 0);
top_label = gen_label_rtx ();
addr = copy_to_mode_reg (Pmode, XEXP (shadow_mem, 0));
shadow_mem = adjust_automodify_address (shadow_mem, SImode, addr, 0);
@@ -1375,7 +1375,7 @@ asan_emit_stack_protection (rtx base, rt
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, last_size, last_size_aligned;
int l;
unsigned char cur_shadow_byte = ASAN_STACK_MAGIC_LEFT;
tree str_cst, decl, id;
@@ -1628,20 +1628,23 @@ asan_emit_stack_protection (rtx base, rt
prev_offset = base_offset;
last_offset = base_offset;
last_size = 0;
+ last_size_aligned = 0;
for (l = length; l; l -= 2)
{
offset = base_offset + ((offsets[l - 1] - base_offset)
- & ~(ASAN_MIN_RED_ZONE_SIZE - HOST_WIDE_INT_1));
- if (last_offset + last_size != offset)
+ & ~(ASAN_RED_ZONE_SIZE - HOST_WIDE_INT_1));
+ if (last_offset + last_size_aligned < offset)
{
shadow_mem = adjust_address (shadow_mem, VOIDmode,
(last_offset - prev_offset)
>> ASAN_SHADOW_SHIFT);
prev_offset = last_offset;
- asan_clear_shadow (shadow_mem, last_size >> ASAN_SHADOW_SHIFT);
+ asan_clear_shadow (shadow_mem, last_size_aligned >> ASAN_SHADOW_SHIFT);
last_offset = offset;
last_size = 0;
}
+ else
+ last_size = offset - last_offset;
last_size += base_offset + ((offsets[l - 2] - base_offset)
& ~(ASAN_MIN_RED_ZONE_SIZE - HOST_WIDE_INT_1))
- offset;
@@ -1667,13 +1670,16 @@ asan_emit_stack_protection (rtx base, rt
last_size += size & ~(ASAN_MIN_RED_ZONE_SIZE - HOST_WIDE_INT_1);
}
}
+ last_size_aligned
+ = ((last_size + (ASAN_RED_ZONE_SIZE - HOST_WIDE_INT_1))
+ & ~(ASAN_RED_ZONE_SIZE - HOST_WIDE_INT_1));
}
- if (last_size)
+ if (last_size_aligned)
{
shadow_mem = adjust_address (shadow_mem, VOIDmode,
(last_offset - prev_offset)
>> ASAN_SHADOW_SHIFT);
- asan_clear_shadow (shadow_mem, last_size >> ASAN_SHADOW_SHIFT);
+ asan_clear_shadow (shadow_mem, last_size_aligned >> ASAN_SHADOW_SHIFT);
}
/* Clean-up set with instrumented stack variables. */
@@ -0,0 +1,14 @@
+/* PR sanitizer/88291 */
+/* { dg-do compile } */
+/* { dg-options "-fsanitize=address -Os" } */
+/* { dg-additional-options "-mstringop-strategy=libcall" { target i?86-*-* x86_64-*-* } } */
+
+void bar (void *, void *);
+
+void
+foo (void)
+{
+ int b;
+ char __attribute__((aligned(16))) a[(1 << 20) + 1];
+ bar (&a, &b);
+}