Sometimes the LLVM symbolizer fails to run, with a message like this: ==1421==WARNING: Can't read from symbolizer at fd 3 LLVMSymbolizer: error reading file: Cannot allocate memory This causes a baffling massive leak in LSan (because we rely on white lists to ignore leaks, and the white lists require the symbolizer). Glandium hit this issue on try recently, and this came up on autoland just now: https://treeherder.mozilla.org/logviewer.html#?job_id=90922093&repo=autoland&lineNumber=2851 We should make the "LLVMSymbolizer: error reading file: Cannot allocate memory" message into an error that will show up in the starring interface, so that sheriffs at least have something useful to guide starring, and it will also let us track how often it is happening.

Comment on attachment 8857660 [details] Bug 1355834 - Report LLVM symbolizer OOMs as errors. https://reviewboard.mozilla.org/r/129614/#review136352

Pushed by amccreight@mozilla.com: https://hg.mozilla.org/integration/autoland/rev/f1dcb4f3e6e3 Report LLVM symbolizer OOMs as errors. r=jgraham