234091 2021-12-09 10:57:12 -0800 Reduce maximum mmap size for Structure regions to help placate ios 2021-12-10 06:29:50 -0800 1 1 1 Unclassified WebKit New Bugs WebKit Nightly Build Unspecified Unspecified RESOLVED FIXED InRadar P2 Normal --- 1 keith_miller keith_miller benjamin cdumez cmarcelo ews-watchlist saam webkit-bug-importer oldest_to_newest 1822196 0 keith_miller 2021-12-09 10:57:12 -0800 Reduce maximum mmap size for Structure regions to help placate ios 1822201 1 446568 keith_miller 2021-12-09 11:02:19 -0800 Created attachment 446568 Patch 1822212 2 446571 keith_miller 2021-12-09 11:10:51 -0800 Created attachment 446571 Patch 1822213 3 446568 saam 2021-12-09 11:10:54 -0800 Comment on attachment 446568 Patch View in context: https://bugs.webkit.org/attachment.cgi?id=446568&action=review r=me > Source/WTF/wtf/posix/OSAllocatorPOSIX.cpp:93 > + void* aligned = nullptr; let's call this "result" or similar, maybe "alignedResult". > Source/WTF/wtf/posix/OSAllocatorPOSIX.cpp:95 > + bool copy = false; > + int flags = VM_FLAGS_ANYWHERE; constexpr > Source/WTF/wtf/posix/OSAllocatorPOSIX.cpp:97 > + kern_return_t result = mach_vm_map(mach_task_self(), reinterpret_cast<mach_vm_address_t*>(&aligned), bytes, bytes - 1, flags, MEMORY_OBJECT_NULL, 0, copy, protections, protections, childProcessInheritance); bitwise_cast Also, this code is wrong if not a power of 2, right? Should we assert we're dealing with a power of 2? > Source/WTF/wtf/posix/OSAllocatorPOSIX.cpp:104 > +#if HAVE(MADV_FREE_REUSE) > + if (aligned) { > + // To support the "reserve then commit" model, we have to initially decommit. > + while (madvise(aligned, bytes, MADV_FREE_REUSABLE) == -1 && errno == EAGAIN) { } > + } > +#endif Can we abstract this since we have a similar loop elsewhere? > Source/WTF/wtf/posix/OSAllocatorPOSIX.cpp:106 > + return reinterpret_cast<void*>(aligned); bitwise_cast 1822216 4 446571 saam 2021-12-09 11:12:06 -0800 Comment on attachment 446571 Patch View in context: https://bugs.webkit.org/attachment.cgi?id=446571&action=review r=me still with comment from prior patch > Source/WTF/wtf/posix/OSAllocatorPOSIX.cpp:83 > + UNUSED_PARAM(includesGuardPages); should we assert we're not dealing with this? 1822220 5 446568 keith_miller 2021-12-09 11:15:53 -0800 Comment on attachment 446568 Patch View in context: https://bugs.webkit.org/attachment.cgi?id=446568&action=review >> Source/WTF/wtf/posix/OSAllocatorPOSIX.cpp:93 >> + void* aligned = nullptr; > > let's call this "result" or similar, maybe "alignedResult". I'll rename it to address. >> Source/WTF/wtf/posix/OSAllocatorPOSIX.cpp:95 >> + int flags = VM_FLAGS_ANYWHERE; > > constexpr sure. >> Source/WTF/wtf/posix/OSAllocatorPOSIX.cpp:97 >> + kern_return_t result = mach_vm_map(mach_task_self(), reinterpret_cast<mach_vm_address_t*>(&aligned), bytes, bytes - 1, flags, MEMORY_OBJECT_NULL, 0, copy, protections, protections, childProcessInheritance); > > bitwise_cast > > Also, this code is wrong if not a power of 2, right? > > Should we assert we're dealing with a power of 2? Yeah the assert at the top of the function checks that and that the bytes is bigger than page size. >> Source/WTF/wtf/posix/OSAllocatorPOSIX.cpp:104 >> +#endif > > Can we abstract this since we have a similar loop elsewhere? That seems like more code than we save. >> Source/WTF/wtf/posix/OSAllocatorPOSIX.cpp:106 >> + return reinterpret_cast<void*>(aligned); > > bitwise_cast I can actually delete this. 1822222 6 446574 keith_miller 2021-12-09 11:16:29 -0800 Created attachment 446574 Patch for landing 1822248 7 ews-feeder 2021-12-09 11:59:31 -0800 Patch 446574 does not build 1822263 8 446589 keith_miller 2021-12-09 12:38:06 -0800 Created attachment 446589 Patch for landing 1822276 9 446594 keith_miller 2021-12-09 12:57:19 -0800 Created attachment 446594 Patch for landing 1822323 10 446601 keith_miller 2021-12-09 13:55:09 -0800 Created attachment 446601 Patch for landing 1822340 11 saam 2021-12-09 14:35:54 -0800 (In reply to Keith Miller from comment #5) > Comment on attachment 446568 [details] > Patch > > View in context: > https://bugs.webkit.org/attachment.cgi?id=446568&action=review > > >> Source/WTF/wtf/posix/OSAllocatorPOSIX.cpp:93 > >> + void* aligned = nullptr; > > > > let's call this "result" or similar, maybe "alignedResult". > > I'll rename it to address. > > >> Source/WTF/wtf/posix/OSAllocatorPOSIX.cpp:95 > >> + int flags = VM_FLAGS_ANYWHERE; > > > > constexpr > > sure. > > >> Source/WTF/wtf/posix/OSAllocatorPOSIX.cpp:97 > >> + kern_return_t result = mach_vm_map(mach_task_self(), reinterpret_cast<mach_vm_address_t*>(&aligned), bytes, bytes - 1, flags, MEMORY_OBJECT_NULL, 0, copy, protections, protections, childProcessInheritance); > > > > bitwise_cast > > > > Also, this code is wrong if not a power of 2, right? > > > > Should we assert we're dealing with a power of 2? > > Yeah the assert at the top of the function checks that and that the bytes is > bigger than page size. > > >> Source/WTF/wtf/posix/OSAllocatorPOSIX.cpp:104 > >> +#endif > > > > Can we abstract this since we have a similar loop elsewhere? > > That seems like more code than we save. > > >> Source/WTF/wtf/posix/OSAllocatorPOSIX.cpp:106 > >> + return reinterpret_cast<void*>(aligned); > > > > bitwise_cast > > I can actually delete this. Not all of these changes were made. 1822341 12 446568 saam 2021-12-09 14:37:29 -0800 Comment on attachment 446568 Patch View in context: https://bugs.webkit.org/attachment.cgi?id=446568&action=review >>> Source/WTF/wtf/posix/OSAllocatorPOSIX.cpp:104 >>> +#endif >> >> Can we abstract this since we have a similar loop elsewhere? > > That seems like more code than we save. that's not always the reason to abstract stuff like this. It's nice to have a shared implementation IMO because of the looping we do. 1822363 13 ews-feeder 2021-12-09 14:57:24 -0800 Committed r286804 (245044@main): <https://commits.webkit.org/245044@main> All reviewed patches have been landed. Closing bug and clearing flags on attachment 446601. 1822365 14 webkit-bug-importer 2021-12-09 14:58:25 -0800 <rdar://problem/86292683> 1822426 15 ryanhaddad 2021-12-09 16:47:56 -0800 Reverted r286804 for reason: Breaks internal builds. Committed r286818 (245054@trunk): <https://commits.webkit.org/245054@trunk> 1822658 16 446714 keith_miller 2021-12-10 05:36:45 -0800 Created attachment 446714 Patch for landing 1822675 17 ews-feeder 2021-12-10 06:29:46 -0800 Committed r286849 (245082@main): <https://commits.webkit.org/245082@main> All reviewed patches have been landed. Closing bug and clearing flags on attachment 446714. 446568 2021-12-09 11:02:19 -0800 2021-12-09 11:20:57 -0800 Patch bug-234091-20211209140218.patch text/plain 4073 keith_miller U3VidmVyc2lvbiBSZXZpc2lvbjogMjg2NzgyCmRpZmYgLS1naXQgYS9Tb3VyY2UvV1RGL0NoYW5n ZUxvZyBiL1NvdXJjZS9XVEYvQ2hhbmdlTG9nCmluZGV4IGE0ZTg0OWUwYmQ3OGVkNmZmYjk1Yzll NzFhZDYwM2FkNDI0MGRjMTguLmRlYzA0ZGVjNmE1MzZkM2Q3ODI5YTRhYzU4NzkzNzU4N2MxZTk0 OTQgMTAwNjQ0Ci0tLSBhL1NvdXJjZS9XVEYvQ2hhbmdlTG9nCisrKyBiL1NvdXJjZS9XVEYvQ2hh bmdlTG9nCkBAIC0xLDMgKzEsMTYgQEAKKzIwMjEtMTItMDkgIEtlaXRoIE1pbGxlciAgPGtlaXRo X21pbGxlckBhcHBsZS5jb20+CisKKyAgICAgICAgUmVkdWNlIG1heGltdW0gbW1hcCBzaXplIGZv ciBTdHJ1Y3R1cmUgcmVnaW9ucyB0byBoZWxwIHBsYWNhdGUgaW9zCisgICAgICAgIGh0dHBzOi8v YnVncy53ZWJraXQub3JnL3Nob3dfYnVnLmNnaT9pZD0yMzQwOTEKKworICAgICAgICBSZXZpZXdl ZCBieSBOT0JPRFkgKE9PUFMhKS4KKworICAgICAgICBVc2UgbWFjaF92bV9tYXAgc2luY2UgdGhh dCBzdXBwb3J0cyBtZW1vcnkgYWxpZ25lbWVudCBzbyB3ZSBkb24ndCBoYXZlIHRvIG1hcCAyeCBk 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