1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
|
/*
* Copyright © 2017 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 unsuccessful-relink.c
*
* Render using a program with a uniform. Modify the uniform and then
* do a relink that will fail. This shouldn’t affect the original
* program and it should render with the new uniform value.
*
* GLSL 4.6 spec section 7.3:
*
* “If a program object that is active for any shader stage is
* re-linked unsuccessfully, the link status will be set to FALSE,
* but any existing executables and associated state will remain part
* of the current rendering state until a subsequent call to
* UseProgram, UseProgramStages, or BindProgramPipeline removes them
* from use.”
*/
#include "piglit-util-gl.h"
PIGLIT_GL_TEST_CONFIG_BEGIN
config.supports_gl_compat_version = 20;
config.window_visual = PIGLIT_GL_VISUAL_RGB | PIGLIT_GL_VISUAL_DOUBLE;
PIGLIT_GL_TEST_CONFIG_END
static const char vs_source[] =
"attribute vec4 piglit_vertex;\n"
"void main()\n"
"{\n"
" gl_Position = piglit_vertex;\n"
"}\n";
static const char fs_source[] =
"uniform vec4 color;\n"
"void main()\n"
"{\n"
" gl_FragColor = color;\n"
"}\n";
static const float green[] = { 0.0f, 1.0f, 0.0f, 1.0f };
static const float purple[] = { 0.5f, 0.0f, 0.5f, 1.0f };
static bool
try_render(GLuint vertex_attrib,
const float *color)
{
struct vertex { float x, y; };
static const struct vertex verts[] = {
{ -1, -1 }, { 1, -1 },
{ -1, 1 }, { 1, 1 }
};
bool pass;
GLuint buf;
/* This isn’t using piglit_draw_rect because that tries to
* call glGetAttribLocation which won’t work on the unlinked
* program
*/
glGenBuffers(1, &buf);
glBindBuffer(GL_ARRAY_BUFFER, buf);
glBufferData(GL_ARRAY_BUFFER, sizeof verts, verts, GL_STATIC_DRAW);
glVertexAttribPointer(vertex_attrib, 2, GL_FLOAT,
GL_FALSE, sizeof verts[0],
(void *) offsetof(struct vertex, x));
glEnableVertexAttribArray(vertex_attrib);
glDrawArrays(GL_TRIANGLE_STRIP, 0, 4);
glBindBuffer(GL_ARRAY_BUFFER, 0);
glDeleteBuffers(1, &buf);
if (!piglit_check_gl_error(GL_NO_ERROR)) {
fprintf(stderr, "error while drawing\n");
piglit_report_result(PIGLIT_FAIL);
}
pass = piglit_probe_rect_rgb(0, 0,
piglit_width, piglit_height,
color);
if (!pass)
fprintf(stderr, "render failed\n");
return pass;
}
static void
unsuccessful_link(GLuint prog)
{
GLuint shader;
GLint status;
int i;
/* Add the fs shader again. This should cause a link error
* because there would be two main functions in the fragment
* stage. */
for (i = 0; i < 2; i++) {
shader = piglit_compile_shader_text(GL_FRAGMENT_SHADER,
fs_source);
glAttachShader(prog, shader);
}
glLinkProgram(prog);
glGetProgramiv(prog, GL_LINK_STATUS, &status);
if (status) {
fprintf(stderr, "Broken shader unexpectedly linked\n");
piglit_report_result(PIGLIT_FAIL);
}
}
enum piglit_result
piglit_display(void)
{
bool pass = true;
GLuint prog;
GLint color_uniform;
GLint vertex_attrib;
void *dummy_data[2048];
int i;
glViewport(0, 0, piglit_width, piglit_height);
glClear(GL_COLOR_BUFFER_BIT);
prog = piglit_build_simple_program(vs_source, fs_source);
color_uniform = glGetUniformLocation(prog, "color");
if (color_uniform == -1) {
fprintf(stderr, "color uniform missing\n");
piglit_report_result(PIGLIT_FAIL);
}
vertex_attrib = glGetAttribLocation(prog, "piglit_vertex");
if (vertex_attrib == -1) {
fprintf(stderr, "piglit_vertex attrib missing\n");
piglit_report_result(PIGLIT_FAIL);
}
glUseProgram(prog);
glUniform4fv(color_uniform, 1, purple);
if (!try_render(vertex_attrib, purple))
pass = false;
glUniform4fv(color_uniform, 1, green);
unsuccessful_link(prog);
/* This test currently causes a use-after-free error in Mesa
* which causes sporadic failures. In order to increase the
* chances of making the test fail, we will do lots of little
* redundant allocations in the hope of overwriting the data
* previously allocated and freed by Mesa.
*/
for (i = 0; i < ARRAY_SIZE(dummy_data); i++) {
dummy_data[i] = malloc(64);
memset(dummy_data[i], 0, 64);
}
for (i = 0; i < ARRAY_SIZE(dummy_data); i++)
free(dummy_data[i]);
if (!try_render(vertex_attrib, green))
pass = false;
piglit_present_results();
glDeleteProgram(prog);
return pass ? PIGLIT_PASS : PIGLIT_FAIL;
}
void
piglit_init(int argc, char **argv)
{
piglit_require_gl_version(20);
piglit_require_GLSL_version(110);
}
|
