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#!amber
# Copyright 2019 The Amber Authors.
#
# Licensed under the Apache License, Version 2.0 (the "License");
# you may not use this file except in compliance with the License.
# You may obtain a copy of the License at
#
# https://www.apache.org/licenses/LICENSE-2.0
#
# Unless required by applicable law or agreed to in writing, software
# distributed under the License is distributed on an "AS IS" BASIS,
# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
# See the License for the specific language governing permissions and
# limitations under the License.
SHADER compute buffer_overrun GLSL
#version 430
// Only one invocation per workgroup.
layout(local_size_x = 1, local_size_y = 1, local_size_z = 1) in;
layout(set = 0, binding = 0) buffer BlockUint {
uint data[];
} ssbo_uint;
layout(set = 0, binding = 1) buffer BlockInt {
int data[];
} ssbo_int;
void main() {
uint upper_bound = ssbo_uint.data[0];
uint ui;
for (ui = 0; ui < upper_bound; ++ui) {
ssbo_uint.data[ui]++;
}
int int_lower = ssbo_int.data[0];
int int_upper = ssbo_int.data[1];
int i;
for (i = int_lower; i < int_upper; ++i) {
ssbo_int.data[i]++;
}
}
END
BUFFER buf_uint DATA_TYPE uint32 DATA
10000 0 0 0
END
BUFFER buf_int DATA_TYPE int32 DATA
-5 10 0 0 0
END
PIPELINE compute pipeline
ATTACH buffer_overrun
SHADER_OPTIMIZATION buffer_overrun
--graphics-robust-access
END
BIND BUFFER buf_uint AS storage DESCRIPTOR_SET 0 BINDING 0
BIND BUFFER buf_int AS storage DESCRIPTOR_SET 0 BINDING 1
END
# Only one workgroup. Having only one invocation execute ensures
# there are no race conditions.
RUN pipeline 1 1 1
# In the unsigned int index case:
# The first 4 entries are incremented, as expected.
# Beyond that, the remaining indices are clamped to the upper
# bound of the length of the array, minus 1.
EXPECT buf_uint IDX 0 EQ 10001 1 1 9997
# In the signed int index case:
#
# Index 0 is incremented 6 times, for i values -5, -4, -3, -2, -1, 0
# since negative indices are clamped to 0.
# So initial value -5 + 6 --> 1
# Indices 1, 2, 3 are incremented once each.
# Index 4 is incremented 6 times, for i values 4, 5, 6, 7, 8, 9
EXPECT buf_int IDX 0 EQ 1 11 1 1 6
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