Chromium

Thank you for providing more feedback. Adding the requester to the CC list.

Ran into this issue today, anyone looking at this?

Could you share a reproducer?

This is a bit involved; you'll need to install the Emscripten C++-to-WebAssembly compiler and compile and host a small C++ project.

1. https://emscripten.org/docs/getting_started/downloads.html has the steps for installing Emscripten
2. Create a small C++ project and compile it to WebAssembly, e.g.

mkdir ~/Projects/wasm_example
cd ~/Projects/wasm_example
cat << EOF > hello.cc
#include <iostream>

int main() {
  std::cout << "Hello world\n";
}
EOF
emcc hello.cc -o hello.html

3. Host that project with a local web server:

http-server

4. View it at http://localhost:8080 and note that it prints "Hello world" in the console

Now try enabling debug info and setting up debugging as in https://developer.chrome.com/blog/wasm-debugging-2020/

5. Compile the project with debug info enabled:

emcc hello.cc -g -o hello.html

6. Install the C/C++ debugging extension: https://chromewebstore.google.com/detail/cc++-devtools-support-dwa/pdcpmagijalfljmkmjngeonclgbbannb
7. In the extension options (maybe at chrome-extension://pdcpmagijalfljmkmjngeonclgbbannb/ExtensionOptions.html, maybe find it in chrome://extensions), set the path substitution to where you placed the C++ project:

/proc/self/cwd  /Users/wfurr/Projects/wasm_example

8. Reload the page at http://localhost:8080

Expected: Clicking the "wasm" file in the source view will actually show C++ code loaded from the local file system./ Actual: [C/C++ DevTools Support (DWARF)] Loaded debug symbols for http://localhost:8080/hello.wasm, but didn't find any source files in the console.

Project: devtools/devtools-frontend
Branch: main
Author: Philip Pfaffe <pfaffe@chromium.org>
Link:      https://chromium-review.googlesource.com/6233835

Fix rejecting raw modules with empty symbols urls for language plugins

Fix rejecting raw modules with empty symbols urls for language plugins 
 
Fixed: 391283124 
Change-Id: I126671ba1b2d79e815522e97d077f3b70b76600f 
Reviewed-on: https://chromium-review.googlesource.com/c/devtools/devtools-frontend/+/6233835 
Commit-Queue: Philip Pfaffe <pfaffe@chromium.org> 
Commit-Queue: Danil Somsikov <dsv@chromium.org> 
Reviewed-by: Danil Somsikov <dsv@chromium.org> 
Auto-Submit: Philip Pfaffe <pfaffe@chromium.org>

M134 merge request created. Please update crbug/394596603 to have this merge reviewed.

*This merge request uses Chrome's new merge process. Find more information at go/chrome-merge-quickstart.

If you could check whether canary works for you that would be super helpful. 135.0.7001.0 or younger.

Project: devtools/devtools-frontend
Branch: chromium/6998
Author: Philip Pfaffe <pfaffe@chromium.org>
Link:      https://chromium-review.googlesource.com/6243316

Fix rejecting raw modules with empty symbols urls for language plugins

Fix rejecting raw modules with empty symbols urls for language plugins 
 
Bug: 391283124 
Fixed: 394596603 
Change-Id: I126671ba1b2d79e815522e97d077f3b70b76600f 
Reviewed-on: https://chromium-review.googlesource.com/c/devtools/devtools-frontend/+/6233835 
Commit-Queue: Philip Pfaffe <pfaffe@chromium.org> 
Commit-Queue: Danil Somsikov <dsv@chromium.org> 
Reviewed-by: Danil Somsikov <dsv@chromium.org> 
Auto-Submit: Philip Pfaffe <pfaffe@chromium.org> 
(cherry picked from commit eace18837a500772b81a3ab3cc03889713b95d91) 
Reviewed-on: https://chromium-review.googlesource.com/c/devtools/devtools-frontend/+/6243316 
Commit-Queue: Rubber Stamper <rubber-stamper@appspot.gserviceaccount.com> 
Bot-Commit: Rubber Stamper <rubber-stamper@appspot.gserviceaccount.com>

M133 merge request created. Please update crbug/395836193 to have this merge reviewed.

*This merge request uses Chrome's new merge process. Find more information at go/chrome-merge-quickstart.

I expect this has been fixed by https://crrev.com/ca0d44040e4244d4246c1a33f8205b2d46d5d1b6 already, which will be included in the next canary.