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/*
* Copyright (C) 2011 VMware, Inc.
* Copyright (C) 2010 Marek Olšák <maraeo@gmail.com>
*
* Permission is hereby granted, free of charge, to any person obtaining a
* copy of this software and associated documentation files (the "Software"),
* to deal in the Software without restriction, including without limitation
* the rights to use, copy, modify, merge, publish, distribute, sublicense,
* and/or sell copies of the Software, and to permit persons to whom the
* Software is furnished to do so, subject to the following conditions:
*
* The above copyright notice and this permission notice (including the next
* paragraph) shall be included in all copies or substantial portions of the
* Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
* THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
* FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
* DEALINGS IN THE SOFTWARE.
*
* Authors:
* Jose Fonseca <jfonseca@vmware.com>
* Based on code from Marek Olšák <maraeo@gmail.com>
*/
/* Test whether out-of-bounds vertex buffer object cause termination.
*
* Note that the original ARB_vertex_buffer_object extension explicitly states
* program termination is allowed when out-of-bounds vertex buffer object
* fetches occur. The ARB_robustness extension does provides an enbale to
* guarantee that out-of-bounds buffer object accesses by the GPU will have
* deterministic behavior and preclude application instability or termination
* due to an incorrect buffer access. But regardless of ARB_robustness
* extension support it is a good idea not to crash. For example, viewperf
* doesn't properly detect NV_primitive_restart and emits 0xffffffff indices
* which can result in crashes.
*
* TODO:
* - test more vertex/element formats
* - add test for out-of-bound index buffer object access
* - add test non-aligned offsets
* - provide a command line option to actually enable ARB_robustness
*/
#include "piglit-util-gl-common.h"
PIGLIT_GL_TEST_MAIN(
320 /*window_width*/,
320 /*window_height*/,
PIGLIT_GL_VISUAL_RGB)
void piglit_init(int argc, char **argv)
{
piglit_ortho_projection(piglit_width, piglit_height, GL_FALSE);
piglit_require_gl_version(15);
glShadeModel(GL_FLAT);
glClearColor(0.2, 0.2, 0.2, 1.0);
}
static void
random_vertices(GLsizei offset, GLsizei stride, GLsizei count)
{
GLsizei element_size = 2 * sizeof(GLfloat);
GLsizei size;
GLubyte *vertices;
GLsizei i;
if (stride == 0) {
stride = element_size;
}
size = offset + (count - 1)*stride + element_size;
assert(offset % sizeof(GLfloat) == 0);
assert(stride % sizeof(GLfloat) == 0);
glBufferData(GL_ARRAY_BUFFER, size, NULL, GL_STATIC_DRAW);
assert(glGetError() == GL_NO_ERROR);
vertices = glMapBuffer(GL_ARRAY_BUFFER, GL_WRITE_ONLY);
assert(vertices);
if (!vertices) {
return;
}
for (i = 0; i < count; ++i) {
GLfloat *vertex = (GLfloat *)(vertices + offset + i*stride);
vertex[0] = (rand() % 1000) * .001;
vertex[1] = (rand() % 1000) * .001;
}
glUnmapBuffer(GL_ARRAY_BUFFER);
}
static void
random_ushort_indices(GLsizei offset, GLsizei count, GLuint min_index, GLuint max_index)
{
GLushort *indices;
GLsizei size = offset + count*sizeof(*indices);
GLsizei i;
glBufferData(GL_ELEMENT_ARRAY_BUFFER, size, NULL, GL_STATIC_DRAW);
assert(glGetError() == GL_NO_ERROR);
indices = glMapBuffer(GL_ELEMENT_ARRAY_BUFFER, GL_WRITE_ONLY);
assert(indices);
if (!indices) {
return;
}
assert(offset % sizeof(*indices) == 0);
for (i = 0; i < count; ++i) {
GLushort *index = indices + offset / sizeof *indices + i;
*index = min_index + rand() % (max_index - min_index + 1);
}
glUnmapBuffer(GL_ELEMENT_ARRAY_BUFFER);
}
static void test(void)
{
GLsizei vertex_offset;
GLsizei vertex_stride;
GLsizei vertex_count;
GLuint vertex_buffer;
GLsizei index_offset;
GLsizei index_count;
GLuint max_index;
GLuint min_index;
GLuint index_buffer;
vertex_offset = (rand() % 0xff) * sizeof(GLfloat);
vertex_stride = (rand() % 0xf) * sizeof(GLfloat);
vertex_count = 1 + rand() % 0xffff;
index_offset = (rand() % 0xff) * sizeof(GLushort);
index_count = 1 + rand() % 0xffff;
min_index = rand() % vertex_count;
max_index = min_index + rand() % (vertex_count - min_index);
if (!piglit_automatic) {
fprintf(stdout, "vertex_offset = %i\n", vertex_offset);
fprintf(stdout, "vertex_stride = %i\n", vertex_stride);
fprintf(stdout, "vertex_count = %i\n", vertex_count);
fprintf(stdout, "index_offset = %i\n", index_offset);
fprintf(stdout, "index_count = %i\n", index_count);
fprintf(stdout, "min_index = %u\n", min_index);
fprintf(stdout, "max_index = %u\n", max_index);
fprintf(stdout, "\n");
fflush(stdout);
}
glGenBuffers(1, &vertex_buffer);
glGenBuffers(1, &index_buffer);
glBindBuffer(GL_ARRAY_BUFFER, vertex_buffer);
glBindBuffer(GL_ELEMENT_ARRAY_BUFFER, index_buffer);
random_vertices(vertex_offset, vertex_stride, vertex_count);
if (0) {
/* Generate valid indices only */
random_ushort_indices(index_offset, index_count, min_index, max_index);
} else {
/* Generate out-of-range indices */
random_ushort_indices(index_offset, index_count, 0, 2*vertex_count - 1);
}
glVertexPointer(2, GL_FLOAT, vertex_stride, (const void*)(intptr_t)vertex_offset);
glDrawRangeElements(GL_TRIANGLES,
min_index,
max_index,
index_count,
GL_UNSIGNED_SHORT,
(const void*)(intptr_t)index_offset);
assert(glGetError() == GL_NO_ERROR);
/* Call glFinish to prevent the draw from being batched, delaying the cpu crash / gpu crash
* to much later. */
glFinish();
glBindBuffer(GL_ELEMENT_ARRAY_BUFFER, 0);
glBindBuffer(GL_ARRAY_BUFFER, 0);
glDeleteBuffers(1, &index_buffer);
glDeleteBuffers(1, &vertex_buffer);
}
enum piglit_result
piglit_display(void)
{
unsigned i;
glClear(GL_COLOR_BUFFER_BIT);
glEnableClientState(GL_VERTEX_ARRAY);
for (i = 0; i < 1000; ++i) {
test();
assert(glGetError() == GL_NO_ERROR);
}
glFinish();
return PIGLIT_PASS;
}
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