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webgl: Add feature to store backtraces for each WebGL API call for easier debugging.

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This commit is contained in:
Josh Matthews 2018-08-01 14:50:40 -04:00
parent 515afac456
commit 5dc80dd07a
12 changed files with 82 additions and 16 deletions
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3
components/canvas/Cargo.toml
View file

@ -9,6 +9,9 @@ publish = false
name = "canvas"
path = "lib.rs"
[features]
webgl_backtrace = ["canvas_traits/webgl_backtrace"]
[dependencies]
azure = {git = "https://github.com/servo/rust-azure"}
canvas_traits = {path = "../canvas_traits"}

13
components/canvas/gl_context.rs
View file

@ -2,7 +2,7 @@
* License, v. 2.0. If a copy of the MPL was not distributed with this
* file, You can obtain one at http://mozilla.org/MPL/2.0/. */
use canvas_traits::webgl::{WebGLCommand, WebGLVersion};
use canvas_traits::webgl::{WebGLCommand, WebGLVersion, WebGLCommandBacktrace};
use compositing::compositor_thread::{CompositorProxy, self};
use euclid::Size2D;
use gleam::gl;
@ -144,13 +144,18 @@ impl GLContextWrapper {
}
}
pub fn apply_command(&self, cmd: WebGLCommand, state: &mut GLState) {
pub fn apply_command(
&self,
cmd: WebGLCommand,
backtrace: WebGLCommandBacktrace,
state: &mut GLState
) {
match *self {
GLContextWrapper::Native(ref ctx) => {
WebGLImpl::apply(ctx, state, cmd);
WebGLImpl::apply(ctx, state, cmd, backtrace);
}
GLContextWrapper::OSMesa(ref ctx) => {
WebGLImpl::apply(ctx, state, cmd);
WebGLImpl::apply(ctx, state, cmd, backtrace);
}
}
}

25
components/canvas/webgl_thread.rs
View file

@ -137,8 +137,8 @@ impl<VR: WebVRRenderHandler + 'static> WebGLThread<VR> {
WebGLMsg::RemoveContext(ctx_id) => {
self.remove_webgl_context(ctx_id);
},
WebGLMsg::WebGLCommand(ctx_id, command) => {
self.handle_webgl_command(ctx_id, command);
WebGLMsg::WebGLCommand(ctx_id, command, backtrace) => {
self.handle_webgl_command(ctx_id, command, backtrace);
},
WebGLMsg::WebVRCommand(ctx_id, command) => {
self.handle_webvr_command(ctx_id, command);
@ -164,10 +164,15 @@ impl<VR: WebVRRenderHandler + 'static> WebGLThread<VR> {
}
/// Handles a WebGLCommand for a specific WebGLContext
fn handle_webgl_command(&mut self, context_id: WebGLContextId, command: WebGLCommand) {
fn handle_webgl_command(
&mut self,
context_id: WebGLContextId,
command: WebGLCommand,
backtrace: WebGLCommandBacktrace,
) {
let data = Self::make_current_if_needed_mut(context_id, &mut self.contexts, &mut self.bound_context_id);
if let Some(data) = data {
data.ctx.apply_command(command, &mut data.state);
data.ctx.apply_command(command, backtrace, &mut data.state);
}
}
@ -670,7 +675,8 @@ impl WebGLImpl {
pub fn apply<Native: NativeGLContextMethods>(
ctx: &GLContext<Native>,
state: &mut GLState,
command: WebGLCommand
command: WebGLCommand,
_backtrace: WebGLCommandBacktrace,
) {
match command {
WebGLCommand::GetContextAttributes(ref sender) =>
@ -1191,7 +1197,14 @@ impl WebGLImpl {
// TODO: update test expectations in order to enable debug assertions
let error = ctx.gl().get_error();
if error != gl::NO_ERROR {
error!("Last GL operation failed: {:?}", command)
error!("Last GL operation failed: {:?}", command);
#[cfg(feature = "webgl_backtrace")]
{
error!("Backtrace from failed WebGL API:\n{}", _backtrace.backtrace);
if let Some(backtrace) = _backtrace.js_backtrace {
error!("JS backtrace from failed WebGL API:\n{}", backtrace);
}
}
}
assert_eq!(error, gl::NO_ERROR, "Unexpected WebGL error: 0x{:x} ({})", error, error);
}