[PATCH vkd3d v6 1/3] vkd3d: Introduce a vkd3d_bound_range() helper.
Zebediah Figura
zfigura at codeweavers.com
Mon Jul 26 15:51:28 CDT 2021
Signed-off-by: Zebediah Figura <zfigura at codeweavers.com>
---
configure.ac | 1 +
include/private/vkd3d_common.h | 11 +++++++++++
libs/vkd3d/command.c | 4 ++--
libs/vkd3d/device.c | 3 +--
4 files changed, 15 insertions(+), 4 deletions(-)
diff --git a/configure.ac b/configure.ac
index 275bca26..88d58e40 100644
--- a/configure.ac
+++ b/configure.ac
@@ -127,6 +127,7 @@ AS_IF([test "x$with_xcb" != "xno"],
dnl Check for functions
VKD3D_CHECK_FUNC([HAVE_BUILTIN_CLZ], [__builtin_clz], [__builtin_clz(0)])
VKD3D_CHECK_FUNC([HAVE_BUILTIN_POPCOUNT], [__builtin_popcount], [__builtin_popcount(0)])
+VKD3D_CHECK_FUNC([HAVE_BUILTIN_ADD_OVERFLOW], [__builtin_add_overflow], [__builtin_add_overflow(0, 0, (int *)0)])
VKD3D_CHECK_FUNC([HAVE_SYNC_ADD_AND_FETCH], [__sync_add_and_fetch], [__sync_add_and_fetch((int *)0, 0)])
VKD3D_CHECK_FUNC([HAVE_SYNC_SUB_AND_FETCH], [__sync_sub_and_fetch], [__sync_sub_and_fetch((int *)0, 0)])
diff --git a/include/private/vkd3d_common.h b/include/private/vkd3d_common.h
index 4ce2a2e3..369226f8 100644
--- a/include/private/vkd3d_common.h
+++ b/include/private/vkd3d_common.h
@@ -138,6 +138,17 @@ static inline void *vkd3d_memmem( const void *haystack, size_t haystack_len, con
return NULL;
}
+static inline bool vkd3d_bound_range(size_t start, size_t count, size_t limit)
+{
+#ifdef HAVE_BUILTIN_ADD_OVERFLOW
+ size_t sum;
+
+ return !__builtin_add_overflow(start, count, &sum) && sum <= limit;
+#else
+ return start <= limit && count <= limit - start;
+#endif
+}
+
static inline int ascii_isupper(int c)
{
return 'A' <= c && c <= 'Z';
diff --git a/libs/vkd3d/command.c b/libs/vkd3d/command.c
index 614d19e7..93c519af 100644
--- a/libs/vkd3d/command.c
+++ b/libs/vkd3d/command.c
@@ -4422,7 +4422,7 @@ static void STDMETHODCALLTYPE d3d12_command_list_IASetVertexBuffers(ID3D12Graphi
null_resources = &list->device->null_resources;
gpu_va_allocator = &list->device->gpu_va_allocator;
- if (start_slot >= ARRAY_SIZE(list->strides) || view_count > ARRAY_SIZE(list->strides) - start_slot)
+ if (!vkd3d_bound_range(start_slot, view_count, ARRAY_SIZE(list->strides)))
{
WARN("Invalid start slot %u / view count %u.\n", start_slot, view_count);
return;
@@ -4477,7 +4477,7 @@ static void STDMETHODCALLTYPE d3d12_command_list_SOSetTargets(ID3D12GraphicsComm
return;
}
- if (start_slot >= ARRAY_SIZE(buffers) || view_count > ARRAY_SIZE(buffers) - start_slot)
+ if (!vkd3d_bound_range(start_slot, view_count, ARRAY_SIZE(buffers)))
{
WARN("Invalid start slot %u / view count %u.\n", start_slot, view_count);
return;
diff --git a/libs/vkd3d/device.c b/libs/vkd3d/device.c
index 159bc470..be0bf2fb 100644
--- a/libs/vkd3d/device.c
+++ b/libs/vkd3d/device.c
@@ -3515,8 +3515,7 @@ static void STDMETHODCALLTYPE d3d12_device_GetCopyableFootprints(ID3D12Device *i
array_size = d3d12_resource_desc_get_layer_count(desc);
- if (first_sub_resource >= desc->MipLevels * array_size
- || sub_resource_count > desc->MipLevels * array_size - first_sub_resource)
+ if (!vkd3d_bound_range(first_sub_resource, sub_resource_count, desc->MipLevels * array_size))
{
WARN("Invalid sub-resource range %u-%u for resource.\n", first_sub_resource, sub_resource_count);
return;
--
2.32.0
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