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replace drand48 by pcg #10
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rurban
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Jun 5, 2016
The dlopen error contains the filename and is passed verbatim to printf.
so disable any % in the user-controlled name.
repro: mangle a so.
Breakpoint 3, SaveError (pat=0x1005ac486 "%s") at ./dlutils.c:188
188 while ((end = strchr(end, '%'))) { *end = ' '; }
(gdb) p end
$1 = 0x10110ee00 "dlopen(/usr/src/perl/blead/cperl/lib/auto/%B/%B.bundle, 1):
no suitable image found. Did find:\n\t/usr/src/perl/blead/cperl/lib/auto/B/B.bundle:
malformed mach-o image: load command #10 length (4096) wou"...
rurban
pushed a commit
that referenced
this issue
Jun 6, 2016
The dlopen error contains the filename and is passed verbatim to printf.
so disable any % in the user-controlled name.
repro: mangle a so.
Breakpoint 3, SaveError (pat=0x1005ac486 "%s") at ./dlutils.c:188
188 while ((end = strchr(end, '%'))) { *end = ' '; }
(gdb) p end
$1 = 0x10110ee00 "dlopen(/usr/src/perl/blead/cperl/lib/auto/%B/%B.bundle, 1):
no suitable image found. Did find:\n\t/usr/src/perl/blead/cperl/lib/auto/B/B.bundle:
malformed mach-o image: load command #10 length (4096) wou"...
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See https://github.com/imneme/pcg-c-basic for the 32bit
and https://github.com/imneme/pcg-c for the 64bit variant. And my fork and fixes.
This is 20x faster and much better statistically.
Est. 3d
See also perl11/potion#99 for the results of the pcg branch in potion.
Or use the new xoroshift++, which should be even better. See https://www.reddit.com/r/programming/comments/4gtlfz/xoroshiro128_the_fastest_fullperiod_pseudorandom/
Nope: xoroshift128++ is officially broken.
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