src/mesa/main/robustness.c

   1 /*
   2  * Copyright © 2016 Intel Corporation
   3  *
   4  * Permission is hereby granted, free of charge, to any person obtaining a
   5  * copy of this software and associated documentation files (the "Software"),
   6  * to deal in the Software without restriction, including without limitation
   7  * the rights to use, copy, modify, merge, publish, distribute, sublicense,
   8  * and/or sell copies of the Software, and to permit persons to whom the
   9  * Software is furnished to do so, subject to the following conditions:
  10  *
  11  * The above copyright notice and this permission notice (including the next
  12  * paragraph) shall be included in all copies or substantial portions of the
  13  * Software.
  14  *
  15  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
  16  * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
  17  * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
  18  * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
  19  * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
  20  * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
  21  * DEALINGS IN THE SOFTWARE.
  22  */
  23
  24 #include <stdbool.h>
  25 #include "context.h"
  26 #include "debug_output.h"
  27 #include "get.h"
  28 #include "mtypes.h"
  29 #include "macros.h"
  30 #include "main/dispatch.h" /* for _gloffset_COUNT */
  31
  32 static void GLAPIENTRY
  33 _context_lost_GetSynciv(GLsync sync, GLenum pname, GLsizei bufSize,
  34                         GLsizei *length, GLint *values)
  35 {
  36    GET_CURRENT_CONTEXT(ctx);
  37    if (ctx)
  38       _mesa_error(ctx, GL_CONTEXT_LOST, "GetSynciv(invalid call)");
  39
  40    if (pname == GL_SYNC_STATUS && bufSize >= 1)
  41       *values = GL_SIGNALED;
  42 }
  43
  44 static void GLAPIENTRY
  45 _context_lost_GetQueryObjectuiv(GLuint id, GLenum pname, GLuint *params)
  46 {
  47    GET_CURRENT_CONTEXT(ctx);
  48    if (ctx)
  49       _mesa_error(ctx, GL_CONTEXT_LOST, "GetQueryObjectuiv(context lost)");
  50
  51    if (pname == GL_QUERY_RESULT_AVAILABLE)
  52       *params = GL_TRUE;
  53 }
  54
  55 static int
  56 context_lost_nop_handler(void)
  57 {
  58    GET_CURRENT_CONTEXT(ctx);
  59    if (ctx)
  60       _mesa_error(ctx, GL_CONTEXT_LOST, "context lost");
  61
  62    return 0;
  63 }
  64
  65 void
  66 _mesa_set_context_lost_dispatch(struct gl_context *ctx)
  67 {
  68    if (ctx->ContextLost == NULL) {
  69       int numEntries = MAX2(_glapi_get_dispatch_table_size(), _gloffset_COUNT);
  70
  71       ctx->ContextLost = malloc(numEntries * sizeof(_glapi_proc));
  72       if (!ctx->ContextLost)
  73          return;
  74
  75       _glapi_proc *entry = (_glapi_proc *) ctx->ContextLost;
  76       unsigned i;
  77       for (i = 0; i < numEntries; i++)
  78          entry[i] = (_glapi_proc) context_lost_nop_handler;
  79
  80       /* The ARB_robustness specification says:
  81        *
  82        *    "* GetError and GetGraphicsResetStatus behave normally following a
  83        *       graphics reset, so that the application can determine a reset
  84        *       has occurred, and when it is safe to destroy and recreate the
  85        *       context.
  86        *
  87        *     * Any commands which might cause a polling application to block
  88        *       indefinitely will generate a CONTEXT_LOST error, but will also
  89        *       return a value indicating completion to the application. Such
  90        *       commands include:
  91        *
  92        *        + GetSynciv with <pname> SYNC_STATUS ignores the other
  93        *          parameters and returns SIGNALED in <values>.
  94        *
  95        *        + GetQueryObjectuiv with <pname> QUERY_RESULT_AVAILABLE
  96        *          ignores the other parameters and returns TRUE in <params>."
  97        */
  98       SET_GetError(ctx->ContextLost, _mesa_GetError);
  99       SET_GetGraphicsResetStatusARB(ctx->ContextLost, _mesa_GetGraphicsResetStatusARB);
 100       SET_GetSynciv(ctx->ContextLost, _context_lost_GetSynciv);
 101       SET_GetQueryObjectuiv(ctx->ContextLost, _context_lost_GetQueryObjectuiv);
 102    }
 103
 104    ctx->CurrentServerDispatch = ctx->ContextLost;
 105    _glapi_set_dispatch(ctx->CurrentServerDispatch);
 106 }
 107
 108 /**
 109  * Returns an error code specified by GL_ARB_robustness, or GL_NO_ERROR.
 110  * \return current context status
 111  */
 112 GLenum GLAPIENTRY
 113 _mesa_GetGraphicsResetStatusARB( void )
 114 {
 115    GET_CURRENT_CONTEXT(ctx);
 116    GLenum status = GL_NO_ERROR;
 117
 118    /* The ARB_robustness specification says:
 119     *
 120     *     "If the reset notification behavior is NO_RESET_NOTIFICATION_ARB,
 121     *     then the implementation will never deliver notification of reset
 122     *     events, and GetGraphicsResetStatusARB will always return NO_ERROR."
 123     */
 124    if (ctx->Const.ResetStrategy == GL_NO_RESET_NOTIFICATION_ARB) {
 125       if (MESA_VERBOSE & VERBOSE_API)
 126          _mesa_debug(ctx,
 127                      "glGetGraphicsResetStatusARB always returns GL_NO_ERROR "
 128                      "because reset notifictation was not requested at context "
 129                      "creation.\n");
 130
 131       return GL_NO_ERROR;
 132    }
 133
 134    if (ctx->Driver.GetGraphicsResetStatus) {
 135       /* Query the reset status of this context from the driver core.
 136        */
 137       status = ctx->Driver.GetGraphicsResetStatus(ctx);
 138
 139       simple_mtx_lock(&ctx->Shared->Mutex);
 140
 141       /* If this context has not been affected by a GPU reset, check to see if
 142        * some other context in the share group has been affected by a reset.
 143        * If another context saw a reset but this context did not, assume that
 144        * this context was not guilty.
 145        */
 146       if (status != GL_NO_ERROR) {
 147          ctx->Shared->ShareGroupReset = true;
 148          ctx->Shared->DisjointOperation = true;
 149       } else if (ctx->Shared->ShareGroupReset && !ctx->ShareGroupReset) {
 150          status = GL_INNOCENT_CONTEXT_RESET_ARB;
 151       }
 152
 153       ctx->ShareGroupReset = ctx->Shared->ShareGroupReset;
 154       simple_mtx_unlock(&ctx->Shared->Mutex);
 155    }
 156
 157    if (status != GL_NO_ERROR)
 158       _mesa_set_context_lost_dispatch(ctx);
 159
 160    if (!ctx->Driver.GetGraphicsResetStatus && (MESA_VERBOSE & VERBOSE_API))
 161       _mesa_debug(ctx,
 162                   "glGetGraphicsResetStatusARB always returns GL_NO_ERROR "
 163                   "because the driver doesn't track reset status.\n");
 164
 165    return status;
 166 }