Thank you Ryan! Seems like it's indeed not so simple. 1. I don't think this actually works. If I am understanding you correctly we would set the flag based on the asm.js function we are compiling? The relevant flag is actually on the realm of the called sin/cos/tan function thought. I actually think your idea 1. could basically be combined with 2. though. Most of the time the resist fingerprinting flag on the asm.js function would match that of the math function, because they are in the same realm. So we simply remember the flag as you suggested in the compile options, but reject the math function call in the very unlikely case that the RFP flag is different.
Bug 1827576 Comment 4 Edit History
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Thank you Ryan! Seems like it's indeed not so simple. 1. I don't think this actually works. If I am understanding you correctly we would set the flag based on the asm.js function we are compiling? The relevant flag is actually on the realm of the called sin/cos/tan function instead. I actually think your idea 1. could basically be combined with 2. though. Most of the time the resist fingerprinting flag on the asm.js function would match that of the math function, because they are in the same realm. So we simply remember the flag as you suggested in the compile options, but reject the math function call in the very unlikely case that the RFP flag is different.