On 01/18/2014 07:08 AM, Benjamin Smedberg wrote: > On 1/17/2014 4:24 PM, Terrence Cole wrote: >> Exact stack rooting is now enabled by default on desktop builds of >> firefox. > Does this mean that the moving GC is also enabled, or is that a later step?
No, moving GC is a later step. We are targeting moving GC to land in the next cycle so that we can more easily separate the problems. > If we see an increase in the crash rate for nightly builds, is it likely > that they will share a signature, or will this mainly expose itself as > memory corruption, which typically don't have useful crash > stacks/signatures? The second, although stacks will probably have a relatively tight cluster too. Specifically, a crash here will manifest as use-after-free, generally through some specific, local GC pointer variable. > Are there ways for users who are seeing crashes to > turn on extra debugging (memory poisoning in the GC, for example) in > order to make crashes more reliable? Great question! We have a tool called "GC zeal" in builds with --enable-gc-zeal and in all debug builds unconditionally. It adds a small runtime overhead, but gives us fine-grained control over when GC's happen and adds several verification modes for debugging specific problems. I was under the impression that nightlys had this enabled, but I am not seeing it there now. > The stability team will be watching crash-stats closely over the next week. Thanks for keeping an eye out! -Terrence > --BDS > _______________________________________________ dev-platform mailing list dev-platform@lists.mozilla.org https://lists.mozilla.org/listinfo/dev-platform
