Xcode Runtime Sanitizer Demo

This project demonstrates an issue in buildbuddy-io/rules_xcodeproj whereby the Xcode Address Sanitizer feature does not seem to work as expected in BwB (Build-with-Bazel) mode. As described below, a buildbuddy-io/rules_xcodeproj Xcode project is compared to a yonaskolb/XcodeGen Xcode project to understand how a vanilla Xcode project behaves.

This project was created to add context and reproduction steps to the GitHub Issue opened here.

Configuration

These results were validated using the following configuration:

• Host machine:
  • 16-inch MacBook Pro (2021)
  • Apple M1 Max
  • 32 GB memory
  • macOS 12.6 (Monterey)
• Dependecies:
  • Xcode: 14.0.1
  • Bazel: 6.0.0
  • buildbuddy-io/rules_xcodeproj: 0.12.0

Setup

The Makefile contains two commands to demonstrate the issue:

Bazel Project

The following command produces a buildbuddy-io/rules_xcodeproj Xcode project:

make bazel_project

XcodeGen Project

The following command produces a yonaskolb/XcodeGen Xcode project:

make xcodegen_project

Issue

After performing the following steps:

• make bazel_project
• Enable Address Sanitizer via Product > Scheme > Edit Scheme > Run > Diagnostics > Address Sanitizer
• Run App target
• Tap Trigger Address Sanitizer button

We see that the Address Sanitizer does not work as expected in the buildbuddy-io/rules_xcodeproj project.

Expected Outcome

Application execution is halted, and a call-stack identifying the runtime issue is provided.

Actual Outcome

Application execution continues without any halts or crashes.

Notes

• As confirmed here, Address Sanitizer works as expected in BwX mode (Build-with-Xcode).
• As confirmed here, Address Sanitizer works as expected for a Swift implementation in BwB mode (Build-with-Bazel).
• As confirmed here, Address Sanitizer works as expected for a different Objective-C implementation in BwB mode (Build-with-Bazel).