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

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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

Do you have a reference for that ?

If I'm reading this correctly, mmap() just calls malloc(), ignoring all flags: