gcc fatal error: cannot write PCH file: required memory segment unavailable

[3dEyes]

The issue appeared after updating to hrev58388: when building some large projects, gcc started crashing with the error "fatal error: cannot write PCH file: required memory segment unavailable". The problem is not present in hrev58385.

It can be reproduced when building ports such as ppsspp or telegram_desktop.

[waddlesplash]

I guess hrev58388 itself must be to blame, there aren't any other candidates in there really.

I'll see if I can reproduce.

[3dEyes]

​https://github.com/gcc-mirror/gcc/blob/master/gcc/config/host-linux.cc#L119

[waddlesplash]

GCC invokes mmap on a file that's 0x70000 bytes large with a size parameter of 0x530F000. That sounds wrong?

Admittedly the mapping is REGION_PRIVATE_MAP, so maybe it doesn't make sense to deny it in this case.

[waddlesplash]

Fixed in hrev58433.