[PATCH] D86694: [scudo] Allow -fsanitize=scudo on Linux and Windows (WIP, don't land as is)

Tue Sep 15 05:13:54 PDT 2020

aganea added a comment.

@russell.gallop I see a lots of failing tests when running `ninja check-all` on a Scudo-enabled build (stage 2). Do you see the same thing on your end?

  ==89136==ERROR: Scudo failed to allocate 0x10000 (65536) bytes of memory at address 0x4c0090e00 (error code: 1455)
  ==89136==Dumping process modules:
  ERROR: Failed to mmap

If 4.4 TB of virtual pages are mapped in each process (this happens on startup), then we quickly exaust the 48-bit (256 TB) addressable space with 72+ programs running (on a 36-core). Any idea where this 4.4 TB mapping comes from?

Also, the infamous `DynamicLibrary.Shutdown` unittest fails with Scudo, like with SnMalloc. That test covers a tricky situation at shutdown.

Repository:
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https://reviews.llvm.org/D86694