[Piglit] [PATCH] namespace-pollution: Initial framework and test cases for namespace pollution
Ian Romanick
idr at freedesktop.org
Wed Dec 16 18:40:41 PST 2015
From: Ian Romanick <ian.d.romanick at intel.com>
See the giant comment in the top of
tests/general/object-namespace-pollution.c for more details. Currently
only buffer objects and texture objects are supported with glClear and
glGenerateMipmap. Addtional objects and operations will be added.
Both glClear and glGenerateMipmap fail with buffer objects in Mesa
11.0.6 and earlier. These texture object tests pass.
Signed-off-by: Ian Romanick <ian.d.romanick at intel.com>
Cc: Emil Velikov <emil.velikov at collabora.com>
Bugzilla: https://bugs.freedesktop.org/show_bug.cgi?id=92363
---
I have tried to send this out a couple times, but git-send-mail keeps
failing in a way that I don't know how to debug.
There will be more subtests here. I want to send the framework out for
review sooner rather than later.
I do not like the first_unused_texture hack. Comments in the code
explain why it is necessary. I believe this will need to be extended to
support framebuffer objects as well. An alternative approach is to
modify the piglit infrastructure to not use glGenTextures or
glGenFramebuffers with -fbo on non-core profile. I'm not convinced
that's better.
tests/all.py | 8 +
tests/general/CMakeLists.gl.txt | 1 +
tests/general/object-namespace-pollution.c | 603 +++++++++++++++++++++++++++++
3 files changed, 612 insertions(+)
create mode 100644 tests/general/object-namespace-pollution.c
diff --git a/tests/all.py b/tests/all.py
index e3719ee..cfd298e 100644
--- a/tests/all.py
+++ b/tests/all.py
@@ -4579,5 +4579,13 @@ with profile.group_manager(
for sample_count in (str(x) for x in MSAA_SAMPLE_COUNTS):
g(['ext_shader_samples_identical', sample_count])
+with profile.group_manager(
+ PiglitGLTest,
+ grouptools.join('object namespace pollution')) as g:
+ for object_type in ("buffer", "texture"):
+ for operation in ("glClear", "glGenerateMipmap"):
+ g(['object-namespace-pollution', operation, object_type],
+ '{} with {}'.format(object_type, operation))
+
if platform.system() is 'Windows':
profile.filter_tests(lambda p, _: not p.startswith('glx'))
diff --git a/tests/general/CMakeLists.gl.txt b/tests/general/CMakeLists.gl.txt
index 298f59c..4b59d1f 100644
--- a/tests/general/CMakeLists.gl.txt
+++ b/tests/general/CMakeLists.gl.txt
@@ -76,6 +76,7 @@ piglit_add_executable (line-flat-clip-color line-flat-clip-color.c)
piglit_add_executable (lineloop lineloop.c)
piglit_add_executable (longprim longprim.c)
piglit_add_executable (masked-clear masked-clear.c)
+piglit_add_executable (object-namespace-pollution object-namespace-pollution.c)
piglit_add_executable (pos-array pos-array.c)
piglit_add_executable (pbo-drawpixels pbo-drawpixels.c)
piglit_add_executable (pbo-read-argb8888 pbo-read-argb8888.c)
diff --git a/tests/general/object-namespace-pollution.c b/tests/general/object-namespace-pollution.c
new file mode 100644
index 0000000..1d8859e
--- /dev/null
+++ b/tests/general/object-namespace-pollution.c
@@ -0,0 +1,603 @@
+/*
+ * Copyright © 2015 Intel Corporation
+ *
+ * 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.
+ */
+
+/**
+ * \file object-namespace-pollution.c
+ * Verify that the GL implementation does not pollute the object namespace.
+ *
+ * At least through Mesa 11.1.0, Mesa drivers that use "meta" have some
+ * problems with respect to the OpenGL object namespace. Many places inside
+ * meta allocate objects using a mechanism similar to \c glGen*. This poses
+ * serious problems for applications that create objects without using the
+ * associated \c glGen* function (so called "user generated names").
+ *
+ * Section 3.8.12 (Texture Objects) of the OpenGL 2.1 (May 16, 2008) spec
+ * says:
+ *
+ * "The command
+ *
+ * void GenTextures( sizei n, uint *textures );
+ *
+ * returns n previously unused texture object names in textures. These
+ * names are marked as used, for the purposes of GenTextures only, but
+ * they acquire texture state and a dimensionality only when they are
+ * first bound, just as if they were unused."
+ *
+ * Calling glBindTexture on an unused name makes that name be used. An
+ * application can mix user generated names and GL generated names only if it
+ * is careful not to reuse names that were previously returned by
+ * glGenTextures. In practice this means that all user generated names must
+ * be used (i.e., bound) before calling glGenTextures.
+ *
+ * This effectively means that the GL implementation (or, realistically, GL
+ * middleware) is \b never allowed to use glGenTextures because the
+ * application cannot know what names were returned.
+ *
+ * This applies to most kinds of GL objects.
+ *
+ * - buffers
+ * - textures
+ * - samplers
+ * - framebuffers
+ * - renderbuffers
+ * - queries
+ * - vertex programs (from GL_ARB_vertex_program)
+ * - fragment programs (from GL_ARB_fragment_program)
+ * - vertex arrays (from GL_APPLE_vertex_array_object)
+ * - fragment shaders (from GL_ATI_fragment_shader)
+ *
+ * Many object types (ARB vertex array objects, transform feedback objects,
+ * program pipeline objects, GLSL shader / program objects, Intel performance
+ * query objects, etc.) forbid user generated names.
+ *
+ * Some object types (NVIDIA or APPLE fences, EXT vertex shaders, NVIDIA
+ * transform feedback objects) could probably also suffer from this problem.
+ * However, Mesa does not support these objects, so we don't need to test
+ * them.
+ *
+ * GL_AMD_performance_monitor does not specify whether or not user generated
+ * names are allowed.
+ *
+ * This test attempts to observe this kind of invalid behavior. First a GL
+ * operation is performed that may need to create an object. Then the test
+ * creates several objects with user generated names. Finally, the GL
+ * operations are performed again. If the GL implemented generated new names
+ * for the purpose of the operations, those names will likely conflict with
+ * one of the user generated names. This should be observable in one of three
+ * ways.
+ *
+ * - When the test tries to create the object, the object will already exist.
+ * This is detected by the \c glIs* functions.
+ *
+ * - After the second call to the GL operation, the application's object will
+ * have modified state.
+ *
+ * - The second call to the GL operation will fail to perform correctly
+ * because the application modified its data.
+ *
+ * Only the first two methods are employed by this test. This should catch
+ * the vast majority of possible failures. Verifying the correctness of the
+ * GL operation would add a lot of complexity to the test.
+ */
+
+#include "piglit-util-gl.h"
+
+PIGLIT_GL_TEST_CONFIG_BEGIN
+
+ config.supports_gl_compat_version = 12;
+
+PIGLIT_GL_TEST_CONFIG_END
+
+struct enum_value_pair {
+ GLenum value;
+ GLint expected;
+};
+
+/**
+ * Spare objects used by test cases.
+ *
+ * Some tests need to use objects for the GL operation begin tested. For
+ * example, the \c glGenerateMipmap test needs a texture. These objects
+ * cannot be created using \c glGen* because that would conflict with the rest
+ * of the test. Instead statically allocate object names starting with some
+ * high number that we hope the GL won't use or generate during the test.
+ */
+#define FIRST_SPARE_OBJECT 600
+
+/**
+ * Linear feedback shift register random number generator
+ *
+ * Simple Galois LFSRs that is loosely based on
+ * https://en.wikipedia.org/wiki/Linear_feedback_shift_register
+ *
+ * The value of \c state is updated to reflect the new state of the LFSR.
+ * This new value should be passed in for the next iteration.
+ *
+ * \return
+ * Either 0 or 1 based on the incoming value of \c state.
+ */
+static unsigned
+lfsr(uint16_t *state)
+{
+ unsigned output = *state & 1;
+
+ *state = (*state >> 1) ^ (~output & 0x0000B400);
+
+ return output;
+}
+
+/**
+ * Fill some memory with pseudorandom values
+ *
+ * Using two seed values, a pair of LFSRs are used to generate pseudorandom
+ * values to fill the specified memory buffer. Seprarate invocations with
+ * identical \c bytes, \c seed1, and \c seed2 parameters will generate
+ * identical data. This can be used generate data to initialize a buffer and
+ * regenerate the same data to validate the buffer.
+ */
+static void
+generate_random_data(void *_output, size_t bytes, uint16_t seed1,
+ uint16_t seed2)
+{
+ uint8_t *output = (uint8_t *) _output;
+
+ for (unsigned i = 0; i < bytes; i++) {
+ uint8_t byte = 0;
+
+ for (unsigned bit = 0; bit < 8; bit++) {
+ byte <<= 1;
+ byte |= lfsr(&seed1) ^ lfsr(&seed2);
+ }
+
+ output[i] = byte;
+ }
+}
+
+/** \name Methods for operating on buffer objects */
+/*@{*/
+#define BUFFER_DATA_SIZE 1024
+
+static bool
+create_buffer(unsigned name, bool silent_skip)
+{
+ uint8_t data[BUFFER_DATA_SIZE];
+
+ if (!piglit_is_extension_supported("GL_ARB_vertex_buffer_object") &&
+ piglit_get_gl_version() < 14) {
+ if (silent_skip)
+ return true;
+
+ printf("%s requires vertex buffer objects.\n", __func__);
+ piglit_report_result(PIGLIT_SKIP);
+ }
+
+ generate_random_data(data, sizeof(data), GL_ARRAY_BUFFER, name);
+
+ if (glIsBuffer(name)) {
+ printf("\t%s,%d: %u is already a buffer\n",
+ __func__, __LINE__, name);
+ return false;
+ }
+
+ glBindBuffer(GL_ARRAY_BUFFER, name);
+ glBufferData(GL_ARRAY_BUFFER, sizeof(data), data, GL_STATIC_DRAW);
+ glBindBuffer(GL_ARRAY_BUFFER, 0);
+
+ return piglit_check_gl_error(GL_NO_ERROR);
+}
+
+static bool
+validate_buffer(unsigned name, bool silent_skip)
+{
+ static const struct enum_value_pair test_vectors[] = {
+ { GL_BUFFER_SIZE, BUFFER_DATA_SIZE },
+ { GL_BUFFER_USAGE, GL_STATIC_DRAW },
+ { GL_BUFFER_ACCESS, GL_READ_WRITE },
+ { GL_BUFFER_MAPPED, GL_FALSE },
+ };
+ bool pass = true;
+ uint8_t data[BUFFER_DATA_SIZE];
+ void *map;
+
+ if (!piglit_is_extension_supported("GL_ARB_vertex_buffer_object") &&
+ piglit_get_gl_version() < 14) {
+ if (silent_skip)
+ return true;
+
+ printf("%s requires vertex buffer objects.\n", __func__);
+ piglit_report_result(PIGLIT_SKIP);
+ }
+
+ if (!glIsBuffer(name)) {
+ printf("\t%s,%d: %u is not a buffer\n",
+ __func__, __LINE__, name);
+ return false;
+ }
+
+ glBindBuffer(GL_ARRAY_BUFFER, name);
+
+ for (unsigned i = 0; i < ARRAY_SIZE(test_vectors); i++) {
+ GLint got;
+
+ glGetBufferParameteriv(GL_ARRAY_BUFFER,
+ test_vectors[i].value,
+ &got);
+
+ if (got != test_vectors[i].expected) {
+ printf("\t%s,%d: %s of %u: got 0x%x, expected 0x%x\n",
+ __func__, __LINE__,
+ piglit_get_gl_enum_name(test_vectors[i].value),
+ name, got, test_vectors[i].expected);
+ pass = false;
+ }
+ }
+
+ generate_random_data(data, sizeof(data), GL_ARRAY_BUFFER, name);
+ map = glMapBuffer(GL_ARRAY_BUFFER, GL_READ_ONLY);
+ if (map != NULL) {
+ if (memcmp(map, data, sizeof(data)) != 0) {
+ printf("\t%s,%d: Data mismatch in %u\n",
+ __func__, __LINE__, name);
+ pass = false;
+ }
+ } else {
+ printf("\t%s,%d: Unable to map %u\n",
+ __func__, __LINE__, name);
+ pass = false;
+ }
+
+ glUnmapBuffer(GL_ARRAY_BUFFER);
+
+ pass = piglit_check_gl_error(GL_NO_ERROR) && pass;
+
+ return pass;
+}
+/*@}*/
+
+/** \name Methods for operating on texture objects */
+/*@{*/
+#define TEXTURE_DATA_SIZE (16 * 16 * sizeof(GLuint))
+
+static bool
+create_texture(unsigned name, bool silent_skip)
+{
+ uint8_t data[TEXTURE_DATA_SIZE];
+
+ /* Texture objects are always supported, so there is no opportunity to
+ * skip.
+ */
+ (void) silent_skip;
+
+ generate_random_data(data, sizeof(data), GL_TEXTURE_2D, name);
+
+ if (glIsTexture(name)) {
+ printf("\t%s,%d: %u is already a texture\n",
+ __func__, __LINE__, name);
+ return false;
+ }
+
+ glBindTexture(GL_TEXTURE_2D, name);
+ glTexImage2D(GL_TEXTURE_2D, 0, GL_RGBA8, 16, 16, 0, GL_RGBA,
+ GL_UNSIGNED_INT_8_8_8_8, data);
+ glBindTexture(GL_TEXTURE_2D, 0);
+
+ return piglit_check_gl_error(GL_NO_ERROR);
+}
+
+static bool
+validate_texture(unsigned name, bool silent_skip)
+{
+ static const struct enum_value_pair tex_test_vectors[] = {
+ { GL_TEXTURE_WRAP_S, GL_REPEAT },
+ { GL_TEXTURE_WRAP_T, GL_REPEAT },
+ { GL_TEXTURE_WRAP_R, GL_REPEAT },
+ { GL_TEXTURE_MIN_FILTER, GL_NEAREST_MIPMAP_LINEAR },
+ { GL_TEXTURE_MAG_FILTER, GL_LINEAR },
+ { GL_TEXTURE_BASE_LEVEL, 0 },
+ { GL_TEXTURE_MAX_LEVEL, 1000 },
+ };
+ static const struct enum_value_pair tex_level_test_vectors[] = {
+ { GL_TEXTURE_WIDTH, 16 },
+ { GL_TEXTURE_HEIGHT, 16 },
+ { GL_TEXTURE_INTERNAL_FORMAT, GL_RGBA8 },
+ };
+ bool pass = true;
+ uint8_t data[TEXTURE_DATA_SIZE];
+ uint8_t texels[TEXTURE_DATA_SIZE];
+
+ /* Texture objects are always supported, so there is no opportunity to
+ * skip.
+ */
+ (void) silent_skip;
+
+ if (!glIsTexture(name)) {
+ printf("\t%s,%d: %u is not a texture\n",
+ __func__, __LINE__, name);
+ return false;
+ }
+
+ glBindTexture(GL_TEXTURE_2D, name);
+
+ for (unsigned i = 0; i < ARRAY_SIZE(tex_test_vectors); i++) {
+ GLint got;
+
+ glGetTexParameteriv(GL_TEXTURE_2D,
+ tex_test_vectors[i].value,
+ &got);
+
+ if (got != tex_test_vectors[i].expected) {
+ printf("\t%s,%d: %s of %u: got 0x%x, expected 0x%x\n",
+ __func__, __LINE__,
+ piglit_get_gl_enum_name(tex_test_vectors[i].value),
+ name, got, tex_test_vectors[i].expected);
+ pass = false;
+ }
+ }
+
+ for (unsigned i = 0; i < ARRAY_SIZE(tex_level_test_vectors); i++) {
+ GLint got;
+
+ glGetTexLevelParameteriv(GL_TEXTURE_2D, 0,
+ tex_level_test_vectors[i].value,
+ &got);
+
+ if (got != tex_level_test_vectors[i].expected) {
+ printf("\t%s,%d: %s of %u: got 0x%x, expected 0x%x\n",
+ __func__, __LINE__,
+ piglit_get_gl_enum_name(tex_level_test_vectors[i].value),
+ name, got, tex_level_test_vectors[i].expected);
+ pass = false;
+ }
+ }
+
+ /* Try to use glGetnTexImageARB. If the test's 16x16 texture was
+ * replaced with something larger, the call to glGetTexImage will
+ * probably segfault. This could be worked around, but it doesn't
+ * seem worth it.
+ *
+ * If the texture size did change, the glGetTexLevelParameteriv loop
+ * above will have already detected it.
+ */
+ generate_random_data(data, sizeof(data), GL_TEXTURE_2D, name);
+ if (piglit_is_extension_supported("GL_ARB_robustness")) {
+ /* Note: if sizeof(texels) is less than the size of the image,
+ * glGetnTexImageARB will generate GL_INVALID_OPERATION.
+ */
+ glGetnTexImageARB(GL_TEXTURE_2D, 0, GL_RGBA,
+ GL_UNSIGNED_INT_8_8_8_8,
+ sizeof(texels), texels);
+ } else {
+ glGetTexImage(GL_TEXTURE_2D, 0, GL_RGBA,
+ GL_UNSIGNED_INT_8_8_8_8,
+ texels);
+ }
+
+ if (memcmp(texels, data, sizeof(data)) != 0) {
+ printf("\t%s,%d: Data mismatch in %u\n",
+ __func__, __LINE__, name);
+ pass = false;
+ }
+
+ glBindTexture(GL_TEXTURE_2D, 0);
+
+ return piglit_check_gl_error(GL_NO_ERROR) && pass;
+}
+/*@}*/
+
+/** \name GL operation wrapper functions. */
+/*@{*/
+static bool
+do_Clear(bool silent_skip)
+{
+ /* glClear is always supported, so there is no opportunity to skip. */
+ (void) silent_skip;
+
+ glClear(GL_COLOR_BUFFER_BIT);
+ return piglit_check_gl_error(GL_NO_ERROR);
+}
+
+static bool
+do_GenerateMipmap(bool silent_skip)
+{
+ const GLuint tex = FIRST_SPARE_OBJECT;
+ bool pass = true;
+
+ if (!piglit_is_extension_supported("GL_EXT_framebuffer_object") &&
+ !piglit_is_extension_supported("GL_ARB_framebuffer_object") &&
+ piglit_get_gl_version() < 30) {
+ if (silent_skip)
+ return true;
+
+ printf("%s requires framebuffer objects.\n", __func__);
+ piglit_report_result(PIGLIT_SKIP);
+ }
+
+ if (glIsTexture(tex)) {
+ printf("\t%s,%d: %u is already a texture\n",
+ __func__, __LINE__, tex);
+ pass = false;
+ }
+
+ glBindTexture(GL_TEXTURE_2D, tex);
+ glTexImage2D(GL_TEXTURE_2D, 0, GL_RGBA8, 16, 16, 0, GL_RGBA,
+ GL_UNSIGNED_INT_8_8_8_8, NULL);
+ glGenerateMipmap(GL_TEXTURE_2D);
+
+ glBindTexture(GL_TEXTURE_2D, 0);
+ glDeleteTextures(1, &tex);
+
+ return piglit_check_gl_error(GL_NO_ERROR) && pass;
+}
+/*@}*/
+
+static const struct {
+ const char *name;
+ bool (*func)(bool silent_skip);
+} operations[] = {
+ { "glClear", do_Clear },
+ { "glGenerateMipmap", do_GenerateMipmap }
+};
+
+static const struct {
+ const char *name;
+ bool (*create)(unsigned name, bool silent_skip);
+ bool (*validate)(unsigned name, bool silent_skip);
+} object_types[] = {
+ { "buffer", create_buffer, validate_buffer },
+ { "texture", create_texture, validate_texture },
+};
+
+static void
+usage(const char *prog)
+{
+ unsigned i;
+
+ printf("Usage is one of:\n");
+ printf("\t%s\n", prog);
+ printf("\t%s operation object-type\n\n", prog);
+ printf("Where operation is one of:\n");
+
+ for (i = 0; i < ARRAY_SIZE(operations); i++)
+ printf("\t%s\n", operations[i].name);
+
+ printf("\nAnd object-type is one of:\n");
+
+ for (i = 0; i < ARRAY_SIZE(object_types); i++)
+ printf("\t%s\n", object_types[i].name);
+
+ piglit_report_result(PIGLIT_FAIL);
+}
+
+void
+piglit_init(int argc, char **argv)
+{
+ bool pass = true;
+ unsigned i;
+ unsigned first_object_type = 0;
+ unsigned last_object_type = ARRAY_SIZE(object_types) - 1;
+ unsigned first_operation = 0;
+ unsigned last_operation = ARRAY_SIZE(operations) - 1;
+ bool silent = true;
+ unsigned first_unused_texture;
+
+ /* The test is either invoked with no command line parameters (in
+ * which case all test combinations are run) or with an operation name
+ * and an object type (in which case a single test combination is
+ * run).
+ */
+ if (argc != 1 && argc != 3)
+ usage(argv[0]);
+
+ if (argc == 3) {
+ silent = false;
+
+ for (i = 0; i < ARRAY_SIZE(operations); i++) {
+ if (strcmp(argv[1], operations[i].name) == 0) {
+ first_operation = i;
+ last_operation = i;
+ break;
+ }
+ }
+
+ if (i == ARRAY_SIZE(operations))
+ usage(argv[0]);
+
+ for (i = 0; i < ARRAY_SIZE(object_types); i++) {
+ if (strcmp(argv[2], object_types[i].name) == 0) {
+ first_object_type = i;
+ last_object_type = i;
+ break;
+ }
+ }
+
+ if (i == ARRAY_SIZE(object_types))
+ usage(argv[0]);
+
+ printf("Single test case %s with %s\n",
+ object_types[first_object_type].name,
+ operations[first_operation].name);
+ }
+
+ /* This is a bit ugly, but it is necessary. When a test is run with
+ * -fbo, the piglit framework will create some textures before calling
+ * piglit_init. These textures will likely have names that conflict
+ * with the names that are used by this test, so the test should avoid
+ * them.
+ *
+ * HOWEVER, the test should only avoid lower numbered textures. If
+ * the piglit framework created a texture named 1, the test should
+ * still try to use a buffer object named 1.
+ */
+ for (first_unused_texture = 1;
+ first_unused_texture < 16;
+ first_unused_texture++) {
+ if (!glIsTexture(first_unused_texture))
+ break;
+ }
+
+ if (first_unused_texture >= 16)
+ piglit_report_result(PIGLIT_FAIL);
+
+ for (i = first_operation; i <= last_operation; i++)
+ pass = operations[i].func(silent) && pass;
+
+ pass = piglit_check_gl_error(GL_NO_ERROR) && pass;
+
+ for (i = first_object_type; i <= last_object_type; i++) {
+ for (unsigned name = 1; name < 16; name++) {
+ if (strcmp("texture", object_types[i].name) == 0 &&
+ name < first_unused_texture)
+ break;
+
+ pass = object_types[i].create(name, silent) && pass;
+ }
+ }
+
+ pass = piglit_check_gl_error(GL_NO_ERROR) && pass;
+
+ for (i = first_operation; i <= last_operation; i++)
+ pass = operations[i].func(silent) && pass;
+
+ pass = piglit_check_gl_error(GL_NO_ERROR) && pass;
+
+ for (i = first_object_type; i <= last_object_type; i++) {
+ for (unsigned name = 1; name < 16; name++) {
+ if (strcmp("texture", object_types[i].name) == 0 &&
+ name < first_unused_texture)
+ break;
+
+ pass = object_types[i].validate(name, silent) && pass;
+ }
+ }
+
+ pass = piglit_check_gl_error(GL_NO_ERROR) && pass;
+
+ piglit_report_result(pass ? PIGLIT_PASS : PIGLIT_FAIL);
+}
+
+enum piglit_result
+piglit_display(void)
+{
+ /* UNREACHABLE */
+ return PIGLIT_FAIL;
+}
--
2.5.0
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