mstange

diff --git a/gfx/wr/webrender/src/device/gl.rs b/gfx/wr/webrender/src/device/gl.rs
--- a/gfx/wr/webrender/src/device/gl.rs
+++ b/gfx/wr/webrender/src/device/gl.rs
@@ -1281,30 +1281,30 @@ impl Device {
         name: &str,
         shader_type: gl::GLenum,
         source: &String,
     ) -> Result<gl::GLuint, ShaderError> {
         debug!("compile {}", name);
         let id = gl.create_shader(shader_type);

mstange

// Produces rendering that looks like http://tests.themasta.com/turbulence.svg
//
// Save to main.mm, and then compile and run using:
// $ clang++ main.mm -Wall -O3 -framework Cocoa -framework OpenGL -o test && ./test
//
// Equivalent SVG code:
//
// <svg xmlns="http://www.w3.org/2000/svg">
//   <defs>
//     <filter id="turb" color-interpolation-filters="sRGB">

mstange

diff --git a/app/build.gradle b/app/build.gradle
index 1f1926a2..5ed912b2 100644
--- a/app/build.gradle
+++ b/app/build.gradle
@@ -64,17 +64,18 @@ android {
             applicationIdSuffix ".fenix.debug"
             manifestPlaceholders.isRaptorEnabled = "true"
             resValue "bool", "IS_DEBUG", "true"
             pseudoLocalesEnabled true
         }

mstange

// source: simplerperf_report.proto
/**
 * @fileoverview
 * @enhanceable
 * @suppress {messageConventions} JS Compiler reports an error if a variable or
 *     field starts with 'MSG_' and isn't a translatable message.
 * @public
 */
// GENERATED CODE -- DO NOT EDIT!

mstange

I tried this with an x86_64 try build running on an M1 machine, and it worked. It was this build (from Aug 26, 2021) and I'll use it as an example.

TL;DR

You need the XUL.dSYM and a local source checkout of the same revision, and then tell lldb about them like this:

% lldb /Volumes/Firefox\ Nightly/Firefox Nightly.app/Contents/MacOS/firefox
(lldb) target modules add "/Volumes/Firefox Nightly/Firefox Nightly.app/Contents/MacOS/XUL" --symfile ~/Downloads/target.crashreporter-symbols-full/XUL/E13E188188F0368CB252DC67549D134B0/XUL.dSYM/Contents/Resources/DWARF/XUL

mstange

/**
 * This worker makes sourcecode from googlesource.com accessible as
 * plain text, with permissive CORS headers.
 * This is a workaround for https://github.com/google/gitiles/issues/7 :
 * googlesource.com currently only serves base64-encoded sources, and is
 * not accessible by cross-site requests.
 * 
 * Request URL format: /<subdomain>/<path>
 * This gets the code from https://<subdomain>.googlesource.com/<path>?format=TEXT
 * and base64-decodes it.

mstange

// from https://github.com/apple-opensource/dyld/blob/master/dyld3/shared-cache/dsc_extractor.cpp#L817-L849

#include <stdio.h>
#include <stddef.h>
#include <dlfcn.h>


typedef int (*extractor_proc)(const char* shared_cache_file_path, const char* extraction_root_path,
                              void (^progress)(unsigned current, unsigned total));

mstange

Example files for libxul with/without inline information

Native files are from a macOS arm64 build from this treeherder build job.

XUL/4AFD7ADF2E6130A887190DC656D969B60

Binary: XUL.gz (58.3MB, uncompresses to 170.6MB)

Debug file: XUL.dSYM.tar.bz2 (521.2MB, uncompresses to 1.76GB)

mstange

Gotchas with percentage improvements in a profiler

(Something similar to this post was originally written by Boris Zbarsky on his blog, but I can't find the post now.)

If you have a function which takes up 50% of our time, and you optimize that function so that it takes 30% of your time, by what percentage did you reduce overall time and by what percentage did you reduce time in that function?

The tricky bit here is that the 100% reference value is different, because it was also reduced.

    |<------------------------------- 100ms ------------------------------->|