Jeroen Demeyer on Tue, 04 Apr 2017 10:05:02 +0200


[Date Prev] [Date Next] [Thread Prev] [Thread Next] [Date Index] [Thread Index]

Re: emscripten and mmap() 

On 2017-04-04 00:09, Bill Allombert wrote:

... and cygwin at least (that is what #1912 is about).
That's really a different issue from emscripten. PARI itself works fine. The issue with Cygwin is that fork() behaves very differently. Unlike Linux, it does not have copy-on-write semantics. In this case, the flag MAP_NORESERVE apparently makes a difference. 


Apparently, the emulation of mmap() in emscripten lacks
features: for example, MAP_FIXED and the PROT_... flags are simply not
supported.


Do you have a reference for that ?
If I'm reading this correctly, mmap() just calls malloc(), ignoring all flags: 
https://github.com/kripken/emscripten/blob/master/src/library_syscall.js#L872