debug: Add option to print the guest program name in the log

This is helpful to get the name of the guest program that may trigger a
memory leak. One can also pass a custom string as program name by setting
the environment variable GALLIUM_PROCESS_NAME in the guest accordingly.

Signed-off-by: Gert Wollny <gert.wollny@collabora.com>
Signed-off-by: Dave Airlie <airlied@redhat.com>

src/vrend_debug.c

@@ -113,6 +113,7 @@ static const struct debug_named_value vrend_debug_options[] = {
    {"copyres", dbg_copy_resource, "Debug copy resource code path"},
    {"feat", dbg_features, "Log features found"},
    {"tex", dbg_tex, "Log texture operations"},
+   {"caller", dbg_caller, "Log who is creating the context"},
    {"all", dbg_all, "Enable all debugging output"},
    {"guestallow", dbg_allow_guest_override, "Allow the guest to override the debug flags"},
    DEBUG_NAMED_VALUE_END

src/vrend_debug.h

@@ -42,7 +42,8 @@ enum virgl_debug_flags {
    dbg_copy_resource = 1 << 6,
    dbg_features = 1 << 7,
    dbg_tex = 1 << 8,
-   dbg_all = (1 << 9) - 1,
+   dbg_caller = 1 << 9,
+   dbg_all = (1 << 10) - 1,
    dbg_allow_guest_override = 1 << 16,
    dbg_feature_use = 1 << 17,
 };

src/vrend_renderer.c

@@ -5504,6 +5504,8 @@ struct vrend_context *vrend_create_context(int id, uint32_t nlen, const char *de
       strncpy(grctx->debug_name, debug_name, 64);
    }
 
+   VREND_DEBUG(dbg_caller, grctx, "create context\n");
+
    grctx->ctx_id = id;
 
    list_inithead(&grctx->sub_ctxs);