mesa: add env var to force enable the KHR_no_error ctx flag
V2: typo know -> known V3: add security check (Suggested by Nicolai) Reviewed-by: Nicolai Hähnle <nicolai.haehnle@amd.com>
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@ -46,6 +46,9 @@ sometimes be useful for debugging end-user issues.
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<li>MESA_NO_MMX - if set, disables Intel MMX optimizations
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<li>MESA_NO_3DNOW - if set, disables AMD 3DNow! optimizations
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<li>MESA_NO_SSE - if set, disables Intel SSE optimizations
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<li>MESA_NO_ERROR - if set error checking is disabled as per KHR_no_error.
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This will result in undefined behaviour for invalid use of the api, but
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can reduce CPU use for apps that are known to be error free.</li>
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<li>MESA_DEBUG - if set, error messages are printed to stderr. For example,
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if the application generates a GL_INVALID_ENUM error, a corresponding error
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message indicating where the error occurred, and possibly why, will be
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@ -1208,6 +1208,12 @@ _mesa_initialize_context(struct gl_context *ctx,
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if (!init_attrib_groups( ctx ))
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goto fail;
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/* KHR_no_error is likely to crash, overflow memory, etc if an application
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* has errors so don't enable it for setuid processes.
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*/
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if (getenv("MESA_NO_ERROR") && geteuid() == getuid())
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ctx->Const.ContextFlags |= GL_CONTEXT_FLAG_NO_ERROR_BIT_KHR;
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/* setup the API dispatch tables with all nop functions */
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ctx->OutsideBeginEnd = _mesa_alloc_dispatch_table();
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if (!ctx->OutsideBeginEnd)
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