protobuf

Commit Graph

Author	SHA1	Message	Date
Joshua Haberman	73489a9339	Removed the cleanup list It no longer has any users. If we need it later, we can add it back. This saves one pointer of memory from `sizeof(upb_Arena)`. Also, we now allow fuses if if the block allocators differ. This is made possible by cl/520144430, but was not take advantage of in that CL. PiperOrigin-RevId: 520174588	2 years ago
Joshua Haberman	a73852630f	Changed Arena representation so that fusing links arenas together instead of blocks. Previously when fusing, we would concatenate all blocks into a single list that lived in the arena root. From then on, all arenas would add their blocks to this single unified list. After this CL, arenas keep their distinct list of blocks even after being fused. Instead of unifying the block list, fuse now puts the arenas themselves into a list, so all arenas in the fused group can be iterated over at any time. This design makes it easier to keep each individual arena thread-compatible, because fuse and free are now the only mutating operations that touch state that is shared with the entire group. Read-only operations like `SpaceAllocated()` also iterate the list of arenas, but in a read-only fashion. (Note: we need tests for SpaceAllocated(), both single-threaded for correctness and multi-threaded for resilience to crashes and data races). Performance of fuse regresses by 5-20%. This is somewhat expected as we are performing more atomic operations during a fuse. ``` name old cpu/op new cpu/op delta BM_ArenaOneAlloc 18.4ns ± 6% 18.7ns ± 4% +2.00% (p=0.016 n=18+18) BM_ArenaInitialBlockOneAlloc 5.50ns ± 4% 6.57ns ± 4% +19.42% (p=0.000 n=16+17) BM_ArenaFuseUnbalanced/2 59.3ns ±10% 68.7ns ± 4% +15.85% (p=0.000 n=19+19) BM_ArenaFuseUnbalanced/8 479ns ± 5% 540ns ± 8% +12.57% (p=0.000 n=18+19) BM_ArenaFuseUnbalanced/64 4.50µs ± 4% 4.93µs ± 8% +9.59% (p=0.000 n=17+17) BM_ArenaFuseUnbalanced/128 9.24µs ± 3% 9.96µs ± 3% +7.81% (p=0.000 n=17+17) BM_ArenaFuseBalanced/2 63.3ns ±18% 71.0ns ± 4% +12.14% (p=0.000 n=19+18) BM_ArenaFuseBalanced/8 484ns ± 9% 543ns ±10% +12.11% (p=0.000 n=17+16) BM_ArenaFuseBalanced/64 4.50µs ± 6% 4.94µs ± 4% +9.62% (p=0.000 n=19+17) BM_ArenaFuseBalanced/128 9.20µs ± 4% 9.95µs ± 4% +8.12% (p=0.000 n=16+19) BM_LoadAdsDescriptor_Upb<NoLayout> 5.50ms ± 8% 5.69ms ±17% ~ (p=0.189 n=18+19) BM_LoadAdsDescriptor_Upb<WithLayout> 6.10ms ± 5% 6.05ms ± 4% ~ (p=0.258 n=17+18) BM_LoadAdsDescriptor_Proto2<NoLayout> 11.9ms ±15% 11.6ms ± 5% ~ (p=0.589 n=19+16) BM_LoadAdsDescriptor_Proto2<WithLayout> 11.8ms ± 5% 12.4ms ±17% ~ (p=0.604 n=16+20) BM_Parse_Upb_FileDesc<UseArena, Copy> 12.1µs ± 8% 12.1µs ± 4% ~ (p=1.000 n=18+18) BM_Parse_Upb_FileDesc<UseArena, Alias> 11.8µs ±17% 11.1µs ± 4% ~ (p=0.104 n=20+17) BM_Parse_Upb_FileDesc<InitBlock, Copy> 12.0µs ± 5% 11.9µs ± 4% ~ (p=0.134 n=18+19) BM_Parse_Upb_FileDesc<InitBlock, Alias> 10.9µs ± 7% 11.0µs ± 4% ~ (p=0.195 n=17+18) BM_Parse_Proto2<FileDesc, NoArena, Copy> 24.2µs ± 4% 24.4µs ± 7% ~ (p=0.767 n=18+18) BM_Parse_Proto2<FileDesc, UseArena, Copy> 11.6µs ± 5% 11.6µs ± 4% ~ (p=0.621 n=18+16) BM_Parse_Proto2<FileDesc, InitBlock, Copy> 11.3µs ± 3% 11.3µs ± 3% ~ (p=0.743 n=18+18) BM_Parse_Proto2<FileDescSV, InitBlock, Alias> 12.7µs ± 8% 12.7µs ± 4% ~ (p=0.988 n=18+19) BM_SerializeDescriptor_Proto2 5.77µs ± 5% 5.71µs ± 5% ~ (p=0.433 n=17+17) BM_SerializeDescriptor_Upb 10.0µs ± 5% 10.1µs ± 7% ~ (p=0.102 n=19+16) name old time/op new time/op delta BM_ArenaOneAlloc 18.4ns ± 6% 18.8ns ± 4% +1.98% (p=0.019 n=18+18) BM_ArenaInitialBlockOneAlloc 5.51ns ± 4% 6.58ns ± 4% +19.42% (p=0.000 n=16+17) BM_ArenaFuseUnbalanced/2 59.5ns ±10% 68.9ns ± 4% +15.83% (p=0.000 n=19+19) BM_ArenaFuseUnbalanced/8 481ns ± 5% 541ns ± 8% +12.54% (p=0.000 n=18+19) BM_ArenaFuseUnbalanced/64 4.51µs ± 4% 4.94µs ± 8% +9.53% (p=0.000 n=17+17) BM_ArenaFuseUnbalanced/128 9.26µs ± 3% 9.98µs ± 3% +7.79% (p=0.000 n=17+17) BM_ArenaFuseBalanced/2 63.5ns ±19% 71.1ns ± 3% +12.07% (p=0.000 n=19+18) BM_ArenaFuseBalanced/8 485ns ± 9% 551ns ±20% +13.47% (p=0.000 n=17+17) BM_ArenaFuseBalanced/64 4.51µs ± 6% 4.95µs ± 4% +9.62% (p=0.000 n=19+17) BM_ArenaFuseBalanced/128 9.22µs ± 4% 9.97µs ± 4% +8.12% (p=0.000 n=16+19) BM_LoadAdsDescriptor_Upb<NoLayout> 5.52ms ± 8% 5.72ms ±18% ~ (p=0.199 n=18+19) BM_LoadAdsDescriptor_Upb<WithLayout> 6.12ms ± 5% 6.07ms ± 4% ~ (p=0.273 n=17+18) BM_LoadAdsDescriptor_Proto2<NoLayout> 11.9ms ±15% 11.6ms ± 5% ~ (p=0.589 n=19+16) BM_LoadAdsDescriptor_Proto2<WithLayout> 11.9ms ± 5% 12.5ms ±18% ~ (p=0.582 n=16+20) BM_Parse_Upb_FileDesc<UseArena, Copy> 12.2µs ± 8% 12.1µs ± 3% ~ (p=0.963 n=18+18) BM_Parse_Upb_FileDesc<UseArena, Alias> 11.8µs ±17% 11.1µs ± 4% ~ (p=0.104 n=20+17) BM_Parse_Upb_FileDesc<InitBlock, Copy> 12.0µs ± 5% 11.9µs ± 4% ~ (p=0.126 n=18+19) BM_Parse_Upb_FileDesc<InitBlock, Alias> 11.0µs ± 6% 11.1µs ± 4% ~ (p=0.195 n=17+18) BM_Parse_Proto2<FileDesc, NoArena, Copy> 24.3µs ± 4% 24.5µs ± 6% ~ (p=0.743 n=18+18) BM_Parse_Proto2<FileDesc, UseArena, Copy> 11.7µs ± 5% 11.6µs ± 4% ~ (p=0.574 n=18+16) BM_Parse_Proto2<FileDesc, InitBlock, Copy> 11.3µs ± 3% 11.3µs ± 3% ~ (p=0.743 n=18+18) BM_Parse_Proto2<FileDescSV, InitBlock, Alias> 12.7µs ± 8% 12.7µs ± 4% ~ (p=0.988 n=18+19) BM_SerializeDescriptor_Proto2 5.78µs ± 5% 5.73µs ± 5% ~ (p=0.357 n=17+17) BM_SerializeDescriptor_Upb 10.0µs ± 5% 10.1µs ± 7% ~ (p=0.117 n=19+16) name old allocs/op new allocs/op delta BM_ArenaOneAlloc 1.00 ± 0% 1.00 ± 0% ~ (all samples are equal) BM_ArenaFuseUnbalanced/2 2.00 ± 0% 2.00 ± 0% ~ (all samples are equal) BM_ArenaFuseUnbalanced/8 8.00 ± 0% 8.00 ± 0% ~ (all samples are equal) BM_ArenaFuseUnbalanced/64 64.0 ± 0% 64.0 ± 0% ~ (all samples are equal) BM_ArenaFuseUnbalanced/128 128 ± 0% 128 ± 0% ~ (all samples are equal) BM_ArenaFuseBalanced/2 2.00 ± 0% 2.00 ± 0% ~ (all samples are equal) BM_ArenaFuseBalanced/8 8.00 ± 0% 8.00 ± 0% ~ (all samples are equal) BM_ArenaFuseBalanced/64 64.0 ± 0% 64.0 ± 0% ~ (all samples are equal) BM_ArenaFuseBalanced/128 128 ± 0% 128 ± 0% ~ (all samples are equal) BM_LoadAdsDescriptor_Upb<NoLayout> 6.08k ± 0% 6.05k ± 0% -0.54% (p=0.000 n=20+20) BM_LoadAdsDescriptor_Upb<WithLayout> 6.39k ± 0% 6.36k ± 0% -0.55% (p=0.000 n=20+20) BM_LoadAdsDescriptor_Proto2<NoLayout> 83.4k ± 0% 83.4k ± 0% ~ (p=0.800 n=20+20) BM_LoadAdsDescriptor_Proto2<WithLayout> 84.4k ± 0% 84.4k ± 0% ~ (p=0.752 n=20+20) BM_Parse_Upb_FileDesc<UseArena, Copy> 7.00 ± 0% 7.00 ± 0% ~ (all samples are equal) BM_Parse_Upb_FileDesc<UseArena, Alias> 7.00 ± 0% 7.00 ± 0% ~ (all samples are equal) BM_Parse_Proto2<FileDesc, NoArena, Copy> 765 ± 0% 765 ± 0% ~ (all samples are equal) BM_Parse_Proto2<FileDesc, UseArena, Copy> 8.00 ± 0% 8.00 ± 0% ~ (all samples are equal) name old peak-mem(Bytes)/op new peak-mem(Bytes)/op delta BM_ArenaOneAlloc 336 ± 0% 336 ± 0% ~ (all samples are equal) BM_ArenaFuseUnbalanced/2 672 ± 0% 672 ± 0% ~ (all samples are equal) BM_ArenaFuseUnbalanced/8 2.69k ± 0% 2.69k ± 0% ~ (all samples are equal) BM_ArenaFuseUnbalanced/64 21.5k ± 0% 21.5k ± 0% ~ (all samples are equal) BM_ArenaFuseUnbalanced/128 43.0k ± 0% 43.0k ± 0% ~ (all samples are equal) BM_ArenaFuseBalanced/2 672 ± 0% 672 ± 0% ~ (all samples are equal) BM_ArenaFuseBalanced/8 2.69k ± 0% 2.69k ± 0% ~ (all samples are equal) BM_ArenaFuseBalanced/64 21.5k ± 0% 21.5k ± 0% ~ (all samples are equal) BM_ArenaFuseBalanced/128 43.0k ± 0% 43.0k ± 0% ~ (all samples are equal) BM_LoadAdsDescriptor_Upb<NoLayout> 9.89M ± 0% 9.95M ± 0% +0.65% (p=0.000 n=20+20) BM_LoadAdsDescriptor_Upb<WithLayout> 9.95M ± 0% 10.02M ± 0% +0.70% (p=0.000 n=20+20) BM_LoadAdsDescriptor_Proto2<NoLayout> 6.62M ± 0% 6.62M ± 0% ~ (p=0.800 n=20+20) BM_LoadAdsDescriptor_Proto2<WithLayout> 6.66M ± 0% 6.66M ± 0% ~ (p=0.752 n=20+20) BM_Parse_Upb_FileDesc<UseArena, Copy> 36.5k ± 0% 36.5k ± 0% ~ (all samples are equal) BM_Parse_Upb_FileDesc<UseArena, Alias> 36.5k ± 0% 36.5k ± 0% ~ (all samples are equal) BM_Parse_Proto2<FileDesc, NoArena, Copy> 35.8k ± 0% 35.8k ± 0% ~ (all samples are equal) BM_Parse_Proto2<FileDesc, UseArena, Copy> 65.3k ± 0% 65.3k ± 0% ~ (all samples are equal) name old speed new speed delta BM_LoadAdsDescriptor_Upb<NoLayout> 138MB/s ± 7% 132MB/s ±15% ~ (p=0.126 n=18+20) BM_LoadAdsDescriptor_Upb<WithLayout> 124MB/s ± 5% 125MB/s ± 4% ~ (p=0.258 n=17+18) BM_LoadAdsDescriptor_Proto2<NoLayout> 63.9MB/s ±13% 65.2MB/s ± 5% ~ (p=0.589 n=19+16) BM_LoadAdsDescriptor_Proto2<WithLayout> 64.0MB/s ± 5% 61.3MB/s ±15% ~ (p=0.604 n=16+20) BM_Parse_Upb_FileDesc<UseArena, Copy> 620MB/s ± 8% 622MB/s ± 4% ~ (p=1.000 n=18+18) BM_Parse_Upb_FileDesc<UseArena, Alias> 644MB/s ±15% 679MB/s ± 4% ~ (p=0.104 n=20+17) BM_Parse_Upb_FileDesc<InitBlock, Copy> 627MB/s ± 4% 633MB/s ± 4% ~ (p=0.134 n=18+19) BM_Parse_Upb_FileDesc<InitBlock, Alias> 688MB/s ± 6% 682MB/s ± 4% ~ (p=0.195 n=17+18) BM_Parse_Proto2<FileDesc, NoArena, Copy> 310MB/s ± 4% 309MB/s ± 6% ~ (p=0.767 n=18+18) BM_Parse_Proto2<FileDesc, UseArena, Copy> 646MB/s ± 4% 649MB/s ± 4% ~ (p=0.621 n=18+16) BM_Parse_Proto2<FileDesc, InitBlock, Copy> 666MB/s ± 3% 666MB/s ± 3% ~ (p=0.743 n=18+18) BM_Parse_Proto2<FileDescSV, InitBlock, Alias> 592MB/s ± 7% 593MB/s ± 4% ~ (p=0.988 n=18+19) BM_SerializeDescriptor_Proto2 1.30GB/s ± 5% 1.32GB/s ± 5% ~ (p=0.433 n=17+17) BM_SerializeDescriptor_Upb 756MB/s ± 5% 745MB/s ± 6% ~ (p=0.102 n=19+16) ``` PiperOrigin-RevId: 520144430	2 years ago
Joshua Haberman	d450990631	Allow for fuse/free races in `upb_Arena`. Implementation is by kfm@, I only added the portability code around it. `upb_Arena` was designed to be only thread-compatible. However, fusing of arenas muddies the waters somewhat, because two distinct `upb_Arena` objects will end up sharing state when fused. This causes a `upb_Arena_Free(a)` to interfere with `upb_Arena_Fuse(b, c)` if `a` and `b` were previously fused. It turns out that we can use atomics to fix this with about a 35% regression in fuse performance (see below). Arena create+free does not regress, thanks to special-case logic in Free(). `upb_Arena` is still a thread-compatible type, and it is still never safe to call `upb_Arena_xxx(a)` and `upb_Arena_yyy(a)` in parallel. However you can at least now call `upb_Arena_Free(a)` and `upb_Arena_Fuse(b, c)` in parallel, even if `a` and `b` were previously fused. Note that `upb_Arena_Fuse(a, b)` and `upb_Arena_Fuse(c, d)` is still not allowed if `b` and `c` were previously fused. In practice this means that fuses must still be single-threaded within a single fused group. Performance results: ``` name old cpu/op new cpu/op delta BM_ArenaOneAlloc 18.6ns ± 1% 18.6ns ± 1% ~ (p=0.726 n=18+17) BM_ArenaInitialBlockOneAlloc 6.28ns ± 1% 5.73ns ± 1% -8.68% (p=0.000 n=17+20) BM_ArenaFuseUnbalanced/2 44.1ns ± 2% 60.4ns ± 1% +37.05% (p=0.000 n=18+19) BM_ArenaFuseUnbalanced/8 370ns ± 2% 500ns ± 1% +35.12% (p=0.000 n=19+20) BM_ArenaFuseUnbalanced/64 3.52µs ± 1% 4.71µs ± 1% +33.80% (p=0.000 n=18+19) BM_ArenaFuseUnbalanced/128 7.20µs ± 1% 9.72µs ± 2% +34.93% (p=0.000 n=16+19) BM_ArenaFuseBalanced/2 44.4ns ± 2% 61.4ns ± 1% +38.23% (p=0.000 n=20+17) BM_ArenaFuseBalanced/8 373ns ± 2% 509ns ± 1% +36.57% (p=0.000 n=19+17) BM_ArenaFuseBalanced/64 3.55µs ± 2% 4.79µs ± 1% +34.80% (p=0.000 n=19+19) BM_ArenaFuseBalanced/128 7.26µs ± 1% 9.76µs ± 1% +34.45% (p=0.000 n=17+19) BM_LoadAdsDescriptor_Upb<NoLayout> 5.66ms ± 1% 5.69ms ± 1% +0.57% (p=0.013 n=18+20) BM_LoadAdsDescriptor_Upb<WithLayout> 6.30ms ± 1% 6.36ms ± 1% +0.90% (p=0.000 n=19+18) BM_LoadAdsDescriptor_Proto2<NoLayout> 12.1ms ± 1% 12.1ms ± 1% ~ (p=0.118 n=18+18) BM_LoadAdsDescriptor_Proto2<WithLayout> 12.2ms ± 1% 12.3ms ± 1% +0.50% (p=0.006 n=18+18) BM_Parse_Upb_FileDesc<UseArena, Copy> 12.7µs ± 1% 12.7µs ± 1% ~ (p=0.194 n=20+19) BM_Parse_Upb_FileDesc<UseArena, Alias> 11.6µs ± 1% 11.6µs ± 1% ~ (p=0.192 n=20+20) BM_Parse_Upb_FileDesc<InitBlock, Copy> 12.5µs ± 1% 12.5µs ± 0% ~ (p=0.750 n=18+14) BM_Parse_Upb_FileDesc<InitBlock, Alias> 11.4µs ± 1% 11.3µs ± 1% -0.34% (p=0.046 n=19+19) BM_Parse_Proto2<FileDesc, NoArena, Copy> 25.4µs ± 1% 25.7µs ± 2% +1.37% (p=0.000 n=18+18) BM_Parse_Proto2<FileDesc, UseArena, Copy> 12.1µs ± 2% 12.1µs ± 1% ~ (p=0.143 n=18+18) BM_Parse_Proto2<FileDesc, InitBlock, Copy> 11.9µs ± 3% 11.9µs ± 1% ~ (p=0.076 n=17+19) BM_Parse_Proto2<FileDescSV, InitBlock, Alias> 13.2µs ± 1% 13.2µs ± 1% ~ (p=0.053 n=19+19) BM_SerializeDescriptor_Proto2 5.97µs ± 4% 5.90µs ± 4% ~ (p=0.093 n=17+19) BM_SerializeDescriptor_Upb 10.4µs ± 1% 10.4µs ± 1% ~ (p=0.909 n=17+18) name old time/op new time/op delta BM_ArenaOneAlloc 18.7ns ± 2% 18.6ns ± 0% ~ (p=0.607 n=18+17) BM_ArenaInitialBlockOneAlloc 6.29ns ± 1% 5.74ns ± 1% -8.71% (p=0.000 n=17+19) BM_ArenaFuseUnbalanced/2 44.1ns ± 1% 60.6ns ± 1% +37.21% (p=0.000 n=17+19) BM_ArenaFuseUnbalanced/8 371ns ± 2% 500ns ± 1% +35.02% (p=0.000 n=19+16) BM_ArenaFuseUnbalanced/64 3.53µs ± 1% 4.72µs ± 1% +33.85% (p=0.000 n=18+19) BM_ArenaFuseUnbalanced/128 7.22µs ± 1% 9.73µs ± 2% +34.87% (p=0.000 n=16+19) BM_ArenaFuseBalanced/2 44.5ns ± 2% 61.5ns ± 1% +38.22% (p=0.000 n=20+17) BM_ArenaFuseBalanced/8 373ns ± 2% 510ns ± 1% +36.58% (p=0.000 n=19+16) BM_ArenaFuseBalanced/64 3.56µs ± 2% 4.80µs ± 1% +34.87% (p=0.000 n=19+19) BM_ArenaFuseBalanced/128 7.27µs ± 1% 9.77µs ± 1% +34.40% (p=0.000 n=17+19) BM_LoadAdsDescriptor_Upb<NoLayout> 5.67ms ± 1% 5.71ms ± 1% +0.60% (p=0.011 n=18+20) BM_LoadAdsDescriptor_Upb<WithLayout> 6.32ms ± 1% 6.37ms ± 1% +0.87% (p=0.000 n=19+18) BM_LoadAdsDescriptor_Proto2<NoLayout> 12.1ms ± 1% 12.2ms ± 1% ~ (p=0.126 n=18+19) BM_LoadAdsDescriptor_Proto2<WithLayout> 12.2ms ± 1% 12.3ms ± 1% +0.51% (p=0.002 n=18+18) BM_Parse_Upb_FileDesc<UseArena, Copy> 12.7µs ± 1% 12.7µs ± 1% ~ (p=0.149 n=20+19) BM_Parse_Upb_FileDesc<UseArena, Alias> 11.6µs ± 1% 11.6µs ± 1% ~ (p=0.211 n=20+20) BM_Parse_Upb_FileDesc<InitBlock, Copy> 12.5µs ± 1% 12.5µs ± 1% ~ (p=0.986 n=18+15) BM_Parse_Upb_FileDesc<InitBlock, Alias> 11.4µs ± 1% 11.3µs ± 1% ~ (p=0.081 n=19+18) BM_Parse_Proto2<FileDesc, NoArena, Copy> 25.4µs ± 1% 25.8µs ± 2% +1.41% (p=0.000 n=18+18) BM_Parse_Proto2<FileDesc, UseArena, Copy> 12.1µs ± 2% 12.1µs ± 1% ~ (p=0.558 n=19+18) BM_Parse_Proto2<FileDesc, InitBlock, Copy> 12.0µs ± 3% 11.9µs ± 1% ~ (p=0.165 n=17+19) BM_Parse_Proto2<FileDescSV, InitBlock, Alias> 13.2µs ± 1% 13.2µs ± 1% ~ (p=0.070 n=19+19) BM_SerializeDescriptor_Proto2 5.98µs ± 4% 5.92µs ± 3% ~ (p=0.138 n=17+19) BM_SerializeDescriptor_Upb 10.4µs ± 1% 10.4µs ± 1% ~ (p=0.858 n=17+18) ``` PiperOrigin-RevId: 518573683	2 years ago
Protobuf Team Bot	fdb45f0da0	Quiet -Wsign-compare errors PiperOrigin-RevId: 516327145	2 years ago
Joshua Haberman	518e19dc63	Fixed fuzz bug by further validating map entries. Map entry key/value cannot be repeated or map. Value cannot be group. PiperOrigin-RevId: 505586184	2 years ago
Joshua Haberman	df850c821e	Fixed fuzz bug when map entry containing unknown fields spans buffers. To correctly handle this case we must add the serialized map entry to the unknown fields. Ideally we could merely preserve the map entry's serialized bytes from the input. However this is tricky to do if we are streaming and the previous buffer where the map entry began is no longer available. This CL fixes this edge case by using the encoder to re-encode the map entry rather than using the input bytes directly. While this fix is reasonably simple and reliable, it has two unfortunate properties. One is performance: we now must run the encoder to recreate bytes that we already saw in the input. The other is dependencies: this fix has the unfortunate property of making the decoder depend on the encoder. In applications that only want the decoder but not the encoder, this will increase binary size. But the practical effects of this are probably minimal (the vast majority of applications that depend on the decoder will also use the encoder). We can revisit this later and see if there is a better way of preserving the input bytes without re-encoding. For now this fix is simple and correct and fixes the fuzz bug. PiperOrigin-RevId: 505381927	2 years ago
Joshua Haberman	7ad307eea8	Added assert that message-type map values must be linked. PiperOrigin-RevId: 505225954	2 years ago
Joshua Haberman	a5e337f88c	Allow dynamic tree shaking for groups, and disallow groups for map entry sub-messages. The initial motivation for this CL was to fix a bug found by fuzzing. But the fuzz bug pointed out a few edge cases that this CL corrects: 1. The core bug is that we were allowing a map entry sub-message to be linked to a group field. This is not allowed in protobuf schemas, but we did not check for this edge case in `upb_MiniTable_SetSubMessage()`, so we were de facto allowing it. This triggered some bad behavior in the parser whereby we pushed a limit without checking its validity first. 2. To defend against this, I added asserts in `upb_MiniTable_SetSubMessage()` to verify the type of the field we are linking, to ensure that a group field is not linked to a map entry sub-message. But this should probably be changed to return an error instead of relying on asserts for this. 3. I changed the fuzz util code that builds the MiniTable so that it will never violate this new invariant. The fuzz util code now can run into situations where a group field has no valid non-map-entry sub-message to select. In those cases it will simply not register any sub-message for that field. 4. Previously group did not support leaving sub-messages unregistered. Previously I added this feature for sub-messages but not for groups. There is no reason why dynamic tree shaking should not work for group fields, so I extended the feature to support groups also. PiperOrigin-RevId: 504913630	2 years ago
Protobuf Team Bot	2ad7a308e9	Avoid automatic variables in functions using setjmp. According to https://en.cppreference.com/w/c/program/setjmp automatic variables modified in a function calling setjmp can have indeterminate values. Instead, refactor all functions calling setjmp so that the function calling setjmp doesn’t have any local variables. Part VI: Wire encoder/decoder. PiperOrigin-RevId: 504810940	2 years ago
Protobuf Team Bot	76daaa2319	Incremental step towards fixing nonstandard/nonportable uses of setjmp. As https://en.cppreference.com/w/c/program/setjmp explains, setjmp can only be used in very specific contexts to not trigger UB. PiperOrigin-RevId: 499540912	2 years ago
Joshua Haberman	7cd8f6c940	Ported more cases of wire format parsing to upb_WireReader. PiperOrigin-RevId: 498502557	2 years ago
Joshua Haberman	a48af3f824	Moved aliasing logic for string field parsing into EpsCopyInputStream. Moving the logic down to EpsCopyInputStream makes it easier to test and reuse this functionality. We also implement aliasing for the final bytes of the patch buffer, which has never been supported before. We used to always force a copy for any data parsed out of the patch buffer at the end of the stream. Much of this logic is ported directly from the C++ EpsCopyInputStream class. PiperOrigin-RevId: 498091644	2 years ago
Joshua Haberman	68d1d91475	Separated out buffering code into upb_EpsCopyInputStream. This mirrors the structure of C++ protobuf, which has an EpsCopyInputStream class. This will lay the foundation for making EpsCopyInputStream capable of true streaming, by reading its input from a ZeroCopyInputStream. It also lets us test EpsCopyInputStream separately from the decoder: see the new unit test that fuzzes upb_EpsCopyInputStream. After this CL is submitted, the two decoders (the normal decoder and the fast decoder) should no longer be accessing the members of upb_EpsCopyInputStream. PiperOrigin-RevId: 494400285	2 years ago
Joshua Haberman	9c6223c058	Unified all hazzers to use MiniTable accessors This required some work to unify map entry messages with regular messages, with respect to presence. Before map entry fields could never have presence. Now they can have presence according to normal rules. Note that this only applies to times that the user constructs a map entry directly. PiperOrigin-RevId: 490611656	2 years ago
Eric Salo	ff6439fba0	move the wire type definitions into upb/wire/ where they belong PiperOrigin-RevId: 489500430	2 years ago
Eric Salo	27d70edfe2	clean up the :mini_table build target Remove circular dependencies that were bouncing back and forth between msg_internal.h and mini_table/, including: - splitting out each mini table subtype into its own header - moving the non-reflection message code into message/ - moving the accessors from mini_table/ to message/ PiperOrigin-RevId: 489121042	2 years ago
Eric Salo	ff8e1b40ba	create base/ subdir and expand :status build target to :base upb.h is now just a temporary stub PiperOrigin-RevId: 488255988	2 years ago
Eric Salo	75907f7af9	rename the upb_MiniTable subtypes to follow the upb style guide: upb_MiniTable_Enum -> upb_MiniTableEnum upb_MiniTable_Extension -> upb_MiniTableExtension upb_MiniTable_Field -> upb_MiniTableField upb_MiniTable_File -> upb_MiniTableFile upb_MiniTable_Sub -> upb_MiniTableSub PiperOrigin-RevId: 486712960	2 years ago
Eric Salo	f6307877d3	move portability stuff into upb/port/ Also delete redundant system #includes that are already pulled in by port/def.inc PiperOrigin-RevId: 486398989	2 years ago
Eric Salo	46699b72ad	move message set enums into upb/wire/ (and use them) PiperOrigin-RevId: 486366363	2 years ago
Eric Salo	fd040a8bff	create collections/map_internal.h and collections/map_gencode_util.h Move the map-related functions from msg_internal.h that are only used in generated code into map_gencode_util.h. Then move the rest of the map-related functions from msg_internal.h into map_internal.h. PiperOrigin-RevId: 486299140	2 years ago
Eric Salo	fd14316f38	create collections/ subdir for all array and map code PiperOrigin-RevId: 486013554	2 years ago
Eric Salo	e137175092	create wire/ subdir for all wire-format code PiperOrigin-RevId: 485898080	2 years ago
Eric Salo	df34b04658	make upb_ExtensionRegistry_AddArray() and upb_ExtensionRegistry_Lookup() public Previously these were internal _upb functions but it turns out that they are also useful outside of upb. PiperOrigin-RevId: 480997511	2 years ago
Eric Salo	41335a03be	normalize upb_Message_New() We had _upb_Message_New(), which created a message from a mini table and was being used outside of upb even though it is an internal-only function. We also had upb_Message_New(), which created a message from a message def. Now there is a single public function, upb_Message_New(), which creates a message from a mini table and covers all use cases. (The internal version has the same definition and is used for inlining.) PiperOrigin-RevId: 480169804	2 years ago
Protobuf Team Bot	50d36a62b0	Add asserts for unlinked mini tables. In particular upb doesn't handle unlinked groups yet which requires checks to make sure callers did link group subs. PiperOrigin-RevId: 479702475	2 years ago
Joshua Haberman	d5bd55cde1	Treat unlinked sub-messages in the MiniTable as unknown This is an observable behavior change in the decoder. After submitting this CL, clients of the decoder can assume that any unlinked sub-messages will be treated as unknown, rather than crashing. Unlinked sub-messages must never have values present in the message. We can verify this with asserts. Since the values are never set, the encoder should never encounter data for any unlinked sub-message. ``` name old cpu/op new cpu/op delta BM_ArenaOneAlloc 18.3ns ± 9% 17.9ns ± 2% ~ (p=0.690 n=5+5) BM_ArenaInitialBlockOneAlloc 6.40ns ± 1% 6.68ns ±10% ~ (p=0.730 n=4+5) BM_LoadAdsDescriptor_Upb<NoLayout> 5.09ms ± 2% 5.03ms ± 3% ~ (p=0.222 n=5+5) BM_LoadAdsDescriptor_Upb<WithLayout> 5.45ms ± 3% 5.43ms ± 1% ~ (p=0.905 n=5+4) BM_LoadAdsDescriptor_Proto2<NoLayout> 10.9ms ± 1% 10.8ms ± 1% -1.09% (p=0.016 n=5+4) BM_LoadAdsDescriptor_Proto2<WithLayout> 11.3ms ± 9% 11.1ms ± 3% ~ (p=0.841 n=5+5) BM_Parse_Upb_FileDesc<UseArena, Copy> 11.2µs ± 3% 11.3µs ± 3% ~ (p=0.222 n=5+5) BM_Parse_Upb_FileDesc<UseArena, Alias> 10.3µs ± 5% 10.5µs ± 5% ~ (p=0.310 n=5+5) BM_Parse_Upb_FileDesc<InitBlock, Copy> 11.4µs ±18% 11.0µs ± 2% ~ (p=1.000 n=5+5) BM_Parse_Upb_FileDesc<InitBlock, Alias> 10.5µs ±17% 10.6µs ±19% ~ (p=0.421 n=5+5) BM_Parse_Proto2<FileDesc, NoArena, Copy> 20.5µs ± 2% 20.2µs ± 2% ~ (p=0.222 n=5+5) BM_Parse_Proto2<FileDesc, UseArena, Copy> 10.8µs ± 2% 10.9µs ± 4% ~ (p=0.841 n=5+5) BM_Parse_Proto2<FileDesc, InitBlock, Copy> 10.5µs ± 3% 10.6µs ± 3% ~ (p=0.690 n=5+5) BM_Parse_Proto2<FileDescSV, InitBlock, Alias> 9.22µs ± 2% 9.23µs ± 3% ~ (p=1.000 n=5+5) BM_SerializeDescriptor_Proto2 6.05µs ± 3% 5.90µs ± 3% ~ (p=0.222 n=5+5) BM_SerializeDescriptor_Upb 10.2µs ± 3% 10.6µs ±14% ~ (p=0.841 n=5+5) name old time/op new time/op delta BM_ArenaOneAlloc 18.3ns ± 9% 17.9ns ± 2% ~ (p=0.841 n=5+5) BM_ArenaInitialBlockOneAlloc 6.42ns ± 1% 6.69ns ±10% ~ (p=0.730 n=4+5) BM_LoadAdsDescriptor_Upb<NoLayout> 5.10ms ± 2% 5.05ms ± 3% ~ (p=0.222 n=5+5) BM_LoadAdsDescriptor_Upb<WithLayout> 5.47ms ± 3% 5.45ms ± 1% ~ (p=0.905 n=5+4) BM_LoadAdsDescriptor_Proto2<NoLayout> 10.9ms ± 1% 10.8ms ± 1% -1.11% (p=0.016 n=5+4) BM_LoadAdsDescriptor_Proto2<WithLayout> 11.4ms ± 9% 11.1ms ± 3% ~ (p=0.841 n=5+5) BM_Parse_Upb_FileDesc<UseArena, Copy> 11.2µs ± 3% 11.3µs ± 3% ~ (p=0.222 n=5+5) BM_Parse_Upb_FileDesc<UseArena, Alias> 10.3µs ± 5% 10.5µs ± 5% ~ (p=0.151 n=5+5) BM_Parse_Upb_FileDesc<InitBlock, Copy> 11.5µs ±18% 11.0µs ± 2% ~ (p=1.000 n=5+5) BM_Parse_Upb_FileDesc<InitBlock, Alias> 10.5µs ±17% 10.7µs ±19% ~ (p=0.421 n=5+5) BM_Parse_Proto2<FileDesc, NoArena, Copy> 20.6µs ± 2% 20.3µs ± 2% ~ (p=0.222 n=5+5) BM_Parse_Proto2<FileDesc, UseArena, Copy> 10.9µs ± 2% 10.9µs ± 4% ~ (p=0.841 n=5+5) BM_Parse_Proto2<FileDesc, InitBlock, Copy> 10.6µs ± 3% 10.6µs ± 3% ~ (p=0.690 n=5+5) BM_Parse_Proto2<FileDescSV, InitBlock, Alias> 9.24µs ± 2% 9.25µs ± 3% ~ (p=1.000 n=5+5) BM_SerializeDescriptor_Proto2 6.07µs ± 3% 5.91µs ± 3% ~ (p=0.222 n=5+5) BM_SerializeDescriptor_Upb 10.3µs ± 3% 10.6µs ±14% ~ (p=0.841 n=5+5) name old INSTRUCTIONS/op new INSTRUCTIONS/op delta BM_ArenaOneAlloc 201 ± 0% 201 ± 0% ~ (p=0.841 n=5+5) BM_ArenaInitialBlockOneAlloc 69.0 ± 0% 69.0 ± 0% ~ (all samples are equal) BM_LoadAdsDescriptor_Upb<NoLayout> 33.9M ± 0% 34.1M ± 0% +0.66% (p=0.008 n=5+5) BM_LoadAdsDescriptor_Upb<WithLayout> 35.6M ± 0% 35.8M ± 0% +0.64% (p=0.008 n=5+5) BM_LoadAdsDescriptor_Proto2<NoLayout> 70.8M ± 0% 70.8M ± 0% ~ (p=0.548 n=5+5) BM_LoadAdsDescriptor_Proto2<WithLayout> 71.6M ± 0% 71.6M ± 0% ~ (p=0.151 n=5+5) BM_Parse_Upb_FileDesc<UseArena, Copy> 137k ± 0% 141k ± 0% +2.87% (p=0.008 n=5+5) BM_Parse_Upb_FileDesc<UseArena, Alias> 125k ± 0% 128k ± 0% +2.83% (p=0.008 n=5+5) BM_Parse_Upb_FileDesc<InitBlock, Copy> 135k ± 0% 139k ± 0% +2.89% (p=0.008 n=5+5) BM_Parse_Upb_FileDesc<InitBlock, Alias> 124k ± 0% 127k ± 0% +2.85% (p=0.016 n=5+4) BM_Parse_Proto2<FileDesc, NoArena, Copy> 201k ± 0% 201k ± 0% ~ (p=0.222 n=5+5) BM_Parse_Proto2<FileDesc, UseArena, Copy> 107k ± 0% 107k ± 0% ~ (p=1.000 n=5+5) BM_Parse_Proto2<FileDesc, InitBlock, Copy> 105k ± 0% 105k ± 0% ~ (p=0.286 n=5+4) BM_Parse_Proto2<FileDescSV, InitBlock, Alias> 86.5k ± 0% 86.5k ± 0% ~ (p=0.222 n=5+5) BM_SerializeDescriptor_Proto2 60.3k ± 0% 60.3k ± 0% ~ (p=0.071 n=5+5) BM_SerializeDescriptor_Upb 111k ± 0% 111k ± 0% ~ (p=0.841 n=5+5) name old CYCLES/op new CYCLES/op delta BM_ArenaOneAlloc 60.0 ± 7% 58.8 ± 0% -2.15% (p=0.016 n=5+5) BM_ArenaInitialBlockOneAlloc 21.0 ± 0% 21.0 ± 0% ~ (p=1.000 n=5+5) BM_LoadAdsDescriptor_Upb<NoLayout> 16.9M ± 0% 16.9M ± 0% ~ (p=0.056 n=5+5) BM_LoadAdsDescriptor_Upb<WithLayout> 17.9M ± 1% 18.0M ± 1% ~ (p=0.095 n=5+5) BM_LoadAdsDescriptor_Proto2<NoLayout> 35.9M ± 1% 35.8M ± 1% ~ (p=0.421 n=5+5) BM_LoadAdsDescriptor_Proto2<WithLayout> 36.5M ± 0% 36.5M ± 0% ~ (p=0.841 n=5+5) BM_Parse_Upb_FileDesc<UseArena, Copy> 37.2k ± 0% 37.3k ± 0% ~ (p=0.222 n=5+5) BM_Parse_Upb_FileDesc<UseArena, Alias> 34.1k ± 0% 34.7k ± 0% +1.66% (p=0.008 n=5+5) BM_Parse_Upb_FileDesc<InitBlock, Copy> 36.4k ± 0% 36.7k ± 0% +0.83% (p=0.008 n=5+5) BM_Parse_Upb_FileDesc<InitBlock, Alias> 33.3k ± 1% 34.1k ± 1% +2.39% (p=0.008 n=5+5) BM_Parse_Proto2<FileDesc, NoArena, Copy> 68.1k ± 1% 68.0k ± 1% ~ (p=0.421 n=5+5) BM_Parse_Proto2<FileDesc, UseArena, Copy> 36.0k ± 1% 36.1k ± 1% ~ (p=0.841 n=5+5) BM_Parse_Proto2<FileDesc, InitBlock, Copy> 35.3k ± 1% 35.5k ± 1% ~ (p=0.151 n=5+5) BM_Parse_Proto2<FileDescSV, InitBlock, Alias> 30.7k ± 0% 30.9k ± 1% ~ (p=0.151 n=5+5) BM_SerializeDescriptor_Proto2 20.3k ± 2% 19.7k ± 3% ~ (p=0.151 n=5+5) BM_SerializeDescriptor_Upb 33.6k ± 0% 33.7k ± 2% ~ (p=1.000 n=5+5) name old allocs/op new allocs/op delta BM_ArenaOneAlloc 1.19 ± 0% 1.19 ± 0% ~ (all samples are equal) BM_ArenaInitialBlockOneAlloc 0.19 ± 0% 0.19 ± 0% ~ (all samples are equal) BM_LoadAdsDescriptor_Upb<NoLayout> 6.00k ± 0% 6.00k ± 0% ~ (all samples are equal) BM_LoadAdsDescriptor_Upb<WithLayout> 5.99k ± 0% 5.99k ± 0% ~ (all samples are equal) BM_LoadAdsDescriptor_Proto2<NoLayout> 77.8k ± 0% 77.8k ± 0% ~ (all samples are equal) BM_LoadAdsDescriptor_Proto2<WithLayout> 79.0k ± 0% 79.0k ± 0% ~ (all samples are equal) BM_Parse_Upb_FileDesc<UseArena, Copy> 7.19 ± 0% 7.19 ± 0% ~ (all samples are equal) BM_Parse_Upb_FileDesc<UseArena, Alias> 7.19 ± 0% 7.19 ± 0% ~ (all samples are equal) BM_Parse_Upb_FileDesc<InitBlock, Copy> 0.19 ± 0% 0.19 ± 0% ~ (all samples are equal) BM_Parse_Upb_FileDesc<InitBlock, Alias> 0.19 ± 0% 0.19 ± 0% ~ (all samples are equal) BM_Parse_Proto2<FileDesc, NoArena, Copy> 765 ± 0% 765 ± 0% ~ (all samples are equal) BM_Parse_Proto2<FileDesc, UseArena, Copy> 10.2 ± 0% 10.2 ± 0% ~ (all samples are equal) BM_Parse_Proto2<FileDesc, InitBlock, Copy> 1.19 ± 0% 1.19 ± 0% ~ (all samples are equal) BM_Parse_Proto2<FileDescSV, InitBlock, Alias> 1.19 ± 0% 1.19 ± 0% ~ (all samples are equal) BM_SerializeDescriptor_Proto2 0.19 ± 0% 0.19 ± 0% ~ (all samples are equal) BM_SerializeDescriptor_Upb 0.19 ± 0% 0.19 ± 0% ~ (all samples are equal) name old peak-mem(Bytes)/op new peak-mem(Bytes)/op delta BM_ArenaOneAlloc 344 ± 0% 344 ± 0% ~ (all samples are equal) BM_ArenaInitialBlockOneAlloc 112 ± 0% 112 ± 0% ~ (all samples are equal) BM_LoadAdsDescriptor_Upb<NoLayout> 9.64M ± 0% 9.64M ± 0% ~ (all samples are equal) BM_LoadAdsDescriptor_Upb<WithLayout> 9.70M ± 0% 9.70M ± 0% ~ (all samples are equal) BM_LoadAdsDescriptor_Proto2<NoLayout> 6.38M ± 0% 6.38M ± 0% ~ (all samples are equal) BM_LoadAdsDescriptor_Proto2<WithLayout> 6.44M ± 0% 6.44M ± 0% ~ (all samples are equal) BM_Parse_Upb_FileDesc<UseArena, Copy> 36.5k ± 0% 36.5k ± 0% ~ (all samples are equal) BM_Parse_Upb_FileDesc<UseArena, Alias> 36.5k ± 0% 36.5k ± 0% ~ (all samples are equal) BM_Parse_Upb_FileDesc<InitBlock, Copy> 112 ± 0% 112 ± 0% ~ (all samples are equal) BM_Parse_Upb_FileDesc<InitBlock, Alias> 112 ± 0% 112 ± 0% ~ (all samples are equal) BM_Parse_Proto2<FileDesc, NoArena, Copy> 35.8k ± 0% 35.8k ± 0% ~ (all samples are equal) BM_Parse_Proto2<FileDesc, UseArena, Copy> 40.8k ± 0% 40.8k ± 0% ~ (all samples are equal) BM_Parse_Proto2<FileDesc, InitBlock, Copy> 112 ± 0% 112 ± 0% ~ (all samples are equal) BM_Parse_Proto2<FileDescSV, InitBlock, Alias> 112 ± 0% 112 ± 0% ~ (all samples are equal) BM_SerializeDescriptor_Proto2 112 ± 0% 112 ± 0% ~ (all samples are equal) BM_SerializeDescriptor_Upb 112 ± 0% 112 ± 0% ~ (all samples are equal) name old speed new speed delta BM_LoadAdsDescriptor_Upb<NoLayout> 147MB/s ± 2% 148MB/s ± 3% ~ (p=0.222 n=5+5) BM_LoadAdsDescriptor_Upb<WithLayout> 137MB/s ± 3% 137MB/s ± 1% ~ (p=0.905 n=5+4) BM_LoadAdsDescriptor_Proto2<NoLayout> 68.6MB/s ± 1% 69.3MB/s ± 1% +1.10% (p=0.016 n=5+4) BM_LoadAdsDescriptor_Proto2<WithLayout> 66.0MB/s ± 9% 67.4MB/s ± 3% ~ (p=0.841 n=5+5) BM_Parse_Upb_FileDesc<UseArena, Copy> 675MB/s ± 3% 667MB/s ± 3% ~ (p=0.222 n=5+5) BM_Parse_Upb_FileDesc<UseArena, Alias> 730MB/s ± 5% 718MB/s ± 5% ~ (p=0.310 n=5+5) BM_Parse_Upb_FileDesc<InitBlock, Copy> 663MB/s ±16% 685MB/s ± 2% ~ (p=1.000 n=5+5) BM_Parse_Upb_FileDesc<InitBlock, Alias> 723MB/s ±15% 712MB/s ±16% ~ (p=0.421 n=5+5) BM_Parse_Proto2<FileDesc, NoArena, Copy> 367MB/s ± 2% 372MB/s ± 2% ~ (p=0.222 n=5+5) BM_Parse_Proto2<FileDesc, UseArena, Copy> 694MB/s ± 2% 691MB/s ± 4% ~ (p=0.841 n=5+5) BM_Parse_Proto2<FileDesc, InitBlock, Copy> 714MB/s ± 3% 709MB/s ± 3% ~ (p=0.690 n=5+5) BM_Parse_Proto2<FileDescSV, InitBlock, Alias> 816MB/s ± 2% 816MB/s ± 3% ~ (p=1.000 n=5+5) BM_SerializeDescriptor_Proto2 1.24GB/s ± 3% 1.28GB/s ± 3% ~ (p=0.222 n=5+5) BM_SerializeDescriptor_Upb 734MB/s ± 3% 713MB/s ±13% ~ (p=0.841 n=5+5) ``` PiperOrigin-RevId: 477770562	2 years ago
Joshua Haberman	f44653bc52	Readability improvements for decode.c: Several data arrays that are used in only one function have been moved from file scope to the function that uses them. Updated to use C99 array designators so we can specify values by array index. This is more readable and less error-prone than using comments to label each value. There is no functional change for the vast majority of this CL. The only exception is that we now test for OOM when creating a map. PiperOrigin-RevId: 475191072	2 years ago
Joshua Haberman	e55bfa2851	Minor decoder refactor Created a common function for saving/restoring the depth and checking end_group. This will be even more helpful if we decide to add any more state that is saved/resolved when we recurse into a sub-message. This appears to be perf-neutral. PiperOrigin-RevId: 475140169	2 years ago
Joshua Haberman	896e74c141	Optimizes `upb_MiniTable_Enum` for large but dense enums. Optimizes `upb_MiniTable_Enum` for enums with many values (>64) but with relatively dense packing in numeric space. This CL optimizes both the size and speed of such enums: - size: 30x code size reduction - speed: moved from linear search to a constant-time bit test Negative enum values are still expensive, as they are never put into the bitfield. PiperOrigin-RevId: 473259819	3 years ago
Joshua Haberman	ba7603b7c1	Updated decoder internal symbols to new naming scheme. This is a naming change only, with no functional change. We did replace one inline function that had only one caller, but the net effect should be a no-op. I did remove several `return` statements for calls to certain `noreturn` functions. These had no effect but were intended to improve readability. However the unused "return" caused ClangTidy to throw warnings, so these have been removed. PiperOrigin-RevId: 472619191	3 years ago
Joshua Haberman	ececc21624	Fixed bug when parsing an unknown value in a proto2 enum extension. #fuzzing Proto2 enum parsing is the only case where we have to look at the wire value (not merely the tag) to decide whether the field is known or unknown. If the value is unknown, we need to put the value in the Unknown Fields, but for an extension we no longer have easy access to the message, because for extensions we replace the `msg` pointer with a pointer to the extension. The bug occurred when we were treating the fake `upb_Message` (which was actually a pointer to an extension) as a real `upb_Message` that can have unknown fields. This CL fixes the problem by preserving the true message pointer in `d->unknown_msg` when we are parsing an extension. This also required fixing a bug in MiniTable building when fasttables are enabled. We need to set the table_mask to `-1` to disable fasttable parsing, not `0`. For unknown reasons, this CL appears to speed up parsing somewhat significantly. Ideally we should be tracking parsing performance better over time, as it is possible this is merely regaining performance that was lost at a different time: ``` benchy --reference=srcfs third_party/upb/benchmarks:benchmark 10 / 10 [=================================================================================================================] 100.00% 2m32s (Generated by http://go/benchy. Settings: --runs 5 --reference "srcfs") name old cpu/op new cpu/op delta BM_ArenaOneAlloc 23.9ns ± 6% 23.7ns ± 4% ~ (p=0.180 n=53+51) BM_ArenaInitialBlockOneAlloc 7.62ns ± 4% 7.70ns ± 5% +0.99% (p=0.024 n=59+60) BM_LoadAdsDescriptor_Upb<NoLayout> 6.60ms ±10% 6.57ms ± 8% ~ (p=0.607 n=47+54) BM_LoadAdsDescriptor_Upb<WithLayout> 6.92ms ± 5% 6.88ms ± 8% ~ (p=0.257 n=54+54) BM_LoadAdsDescriptor_Proto2<NoLayout> 14.2ms ± 8% 14.0ms ± 7% -1.38% (p=0.025 n=58+59) BM_LoadAdsDescriptor_Proto2<WithLayout> 14.3ms ± 8% 14.2ms ± 8% -1.16% (p=0.031 n=58+57) BM_Parse_Upb_FileDesc<UseArena, Copy> 15.9µs ± 4% 14.6µs ± 4% -7.85% (p=0.000 n=57+59) BM_Parse_Upb_FileDesc<UseArena, Alias> 14.5µs ± 4% 13.3µs ± 5% -8.50% (p=0.000 n=57+60) BM_Parse_Upb_FileDesc<InitBlock, Copy> 15.7µs ± 4% 14.4µs ± 5% -7.99% (p=0.000 n=59+60) BM_Parse_Upb_FileDesc<InitBlock, Alias> 14.2µs ± 5% 13.0µs ± 4% -8.56% (p=0.000 n=57+58) BM_Parse_Proto2<FileDesc, NoArena, Copy> 26.3µs ± 4% 26.2µs ± 4% ~ (p=0.195 n=55+53) BM_Parse_Proto2<FileDesc, UseArena, Copy> 13.3µs ± 5% 13.2µs ± 4% ~ (p=0.085 n=59+59) BM_Parse_Proto2<FileDesc, InitBlock, Copy> 12.9µs ± 4% 12.8µs ± 3% -0.66% (p=0.023 n=60+58) BM_Parse_Proto2<FileDescSV, InitBlock, Alias> 10.9µs ± 6% 10.9µs ± 4% ~ (p=0.063 n=59+58) BM_SerializeDescriptor_Proto2 7.57µs ± 6% 7.62µs ± 6% ~ (p=0.147 n=57+58) BM_SerializeDescriptor_Upb 12.8µs ± 4% 12.8µs ± 4% ~ (p=0.163 n=59+56) name old time/op new time/op delta BM_ArenaOneAlloc 23.9ns ± 5% 23.7ns ± 4% ~ (p=0.172 n=53+51) BM_ArenaInitialBlockOneAlloc 7.62ns ± 4% 7.70ns ± 5% +1.02% (p=0.017 n=59+60) BM_LoadAdsDescriptor_Upb<NoLayout> 6.60ms ±10% 6.58ms ± 8% ~ (p=0.727 n=47+55) BM_LoadAdsDescriptor_Upb<WithLayout> 6.92ms ± 5% 6.88ms ± 8% ~ (p=0.260 n=54+54) BM_LoadAdsDescriptor_Proto2<NoLayout> 14.2ms ± 7% 14.0ms ± 7% -1.40% (p=0.019 n=58+59) BM_LoadAdsDescriptor_Proto2<WithLayout> 14.3ms ± 8% 14.2ms ± 8% -1.13% (p=0.037 n=58+57) BM_Parse_Upb_FileDesc<UseArena, Copy> 15.9µs ± 4% 14.6µs ± 3% -7.88% (p=0.000 n=57+59) BM_Parse_Upb_FileDesc<UseArena, Alias> 14.5µs ± 4% 13.3µs ± 5% -8.46% (p=0.000 n=57+60) BM_Parse_Upb_FileDesc<InitBlock, Copy> 15.7µs ± 4% 14.4µs ± 5% -7.99% (p=0.000 n=59+60) BM_Parse_Upb_FileDesc<InitBlock, Alias> 14.2µs ± 5% 13.0µs ± 4% -8.56% (p=0.000 n=57+58) BM_Parse_Proto2<FileDesc, NoArena, Copy> 26.3µs ± 4% 26.2µs ± 4% ~ (p=0.224 n=55+53) BM_Parse_Proto2<FileDesc, UseArena, Copy> 13.3µs ± 5% 13.2µs ± 4% ~ (p=0.098 n=59+59) BM_Parse_Proto2<FileDesc, InitBlock, Copy> 12.9µs ± 4% 12.8µs ± 3% -0.68% (p=0.015 n=60+58) BM_Parse_Proto2<FileDescSV, InitBlock, Alias> 10.9µs ± 6% 10.9µs ± 4% ~ (p=0.052 n=59+58) BM_SerializeDescriptor_Proto2 7.56µs ± 6% 7.62µs ± 6% ~ (p=0.111 n=58+58) BM_SerializeDescriptor_Upb 12.8µs ± 4% 12.8µs ± 4% ~ (p=0.241 n=56+56) name old allocs/op new allocs/op delta BM_ArenaOneAlloc 1.00 ± 0% 1.00 ± 0% ~ (all samples are equal) BM_ArenaInitialBlockOneAlloc 0.00 ±NaN% 0.00 ±NaN% ~ (all samples are equal) BM_LoadAdsDescriptor_Upb<NoLayout> 5.98k ± 0% 5.98k ± 0% ~ (all samples are equal) BM_LoadAdsDescriptor_Upb<WithLayout> 5.98k ± 0% 5.98k ± 0% ~ (all samples are equal) BM_LoadAdsDescriptor_Proto2<NoLayout> 80.9k ± 0% 80.9k ± 0% ~ (all samples are equal) BM_LoadAdsDescriptor_Proto2<WithLayout> 82.1k ± 0% 82.1k ± 0% ~ (all samples are equal) BM_Parse_Upb_FileDesc<UseArena, Copy> 7.00 ± 0% 7.00 ± 0% ~ (all samples are equal) BM_Parse_Upb_FileDesc<UseArena, Alias> 7.00 ± 0% 7.00 ± 0% ~ (all samples are equal) BM_Parse_Upb_FileDesc<InitBlock, Copy> 0.00 ±NaN% 0.00 ±NaN% ~ (all samples are equal) BM_Parse_Upb_FileDesc<InitBlock, Alias> 0.00 ±NaN% 0.00 ±NaN% ~ (all samples are equal) BM_Parse_Proto2<FileDesc, NoArena, Copy> 765 ± 0% 765 ± 0% ~ (all samples are equal) BM_Parse_Proto2<FileDesc, UseArena, Copy> 9.00 ± 0% 9.00 ± 0% ~ (all samples are equal) BM_Parse_Proto2<FileDesc, InitBlock, Copy> 0.00 ±NaN% 0.00 ±NaN% ~ (all samples are equal) BM_Parse_Proto2<FileDescSV, InitBlock, Alias> 0.00 ±NaN% 0.00 ±NaN% ~ (all samples are equal) BM_SerializeDescriptor_Proto2 0.00 ±NaN% 0.00 ±NaN% ~ (all samples are equal) BM_SerializeDescriptor_Upb 0.00 ±NaN% 0.00 ±NaN% ~ (all samples are equal) name old peak-mem(Bytes)/op new peak-mem(Bytes)/op delta BM_ArenaOneAlloc 344 ± 0% 344 ± 0% ~ (all samples are equal) BM_ArenaInitialBlockOneAlloc 0.00 ±NaN% 0.00 ±NaN% ~ (all samples are equal) BM_LoadAdsDescriptor_Upb<NoLayout> 9.60M ± 0% 9.60M ± 0% ~ (all samples are equal) BM_LoadAdsDescriptor_Upb<WithLayout> 9.68M ± 0% 9.68M ± 0% ~ (all samples are equal) BM_LoadAdsDescriptor_Proto2<NoLayout> 6.41M ± 0% 6.41M ± 0% ~ (all samples are equal) BM_LoadAdsDescriptor_Proto2<WithLayout> 6.44M ± 0% 6.44M ± 0% ~ (all samples are equal) BM_Parse_Upb_FileDesc<UseArena, Copy> 36.5k ± 0% 36.5k ± 0% ~ (all samples are equal) BM_Parse_Upb_FileDesc<UseArena, Alias> 36.5k ± 0% 36.5k ± 0% ~ (all samples are equal) BM_Parse_Upb_FileDesc<InitBlock, Copy> 0.00 ±NaN% 0.00 ±NaN% ~ (all samples are equal) BM_Parse_Upb_FileDesc<InitBlock, Alias> 0.00 ±NaN% 0.00 ±NaN% ~ (all samples are equal) BM_Parse_Proto2<FileDesc, NoArena, Copy> 35.8k ± 0% 35.8k ± 0% ~ (all samples are equal) BM_Parse_Proto2<FileDesc, UseArena, Copy> 40.7k ± 0% 40.7k ± 0% ~ (all samples are equal) BM_Parse_Proto2<FileDesc, InitBlock, Copy> 0.00 ±NaN% 0.00 ±NaN% ~ (all samples are equal) BM_Parse_Proto2<FileDescSV, InitBlock, Alias> 0.00 ±NaN% 0.00 ±NaN% ~ (all samples are equal) BM_SerializeDescriptor_Proto2 0.00 ±NaN% 0.00 ±NaN% ~ (all samples are equal) BM_SerializeDescriptor_Upb 0.00 ±NaN% 0.00 ±NaN% ~ (all samples are equal) name old speed new speed delta BM_LoadAdsDescriptor_Upb<NoLayout> 113MB/s ± 9% 113MB/s ± 8% ~ (p=0.712 n=47+55) BM_LoadAdsDescriptor_Upb<WithLayout> 107MB/s ± 8% 108MB/s ± 8% ~ (p=0.200 n=55+54) BM_LoadAdsDescriptor_Proto2<NoLayout> 52.5MB/s ± 8% 53.3MB/s ± 7% +1.51% (p=0.018 n=59+59) BM_LoadAdsDescriptor_Proto2<WithLayout> 51.9MB/s ± 7% 52.4MB/s ± 8% +1.01% (p=0.050 n=58+58) BM_Parse_Upb_FileDesc<UseArena, Copy> 473MB/s ± 4% 514MB/s ± 4% +8.52% (p=0.000 n=57+59) BM_Parse_Upb_FileDesc<UseArena, Alias> 518MB/s ± 4% 566MB/s ± 5% +9.30% (p=0.000 n=57+60) BM_Parse_Upb_FileDesc<InitBlock, Copy> 480MB/s ± 4% 521MB/s ± 5% +8.69% (p=0.000 n=59+60) BM_Parse_Upb_FileDesc<InitBlock, Alias> 528MB/s ± 4% 578MB/s ± 4% +9.36% (p=0.000 n=57+58) BM_Parse_Proto2<FileDesc, NoArena, Copy> 286MB/s ± 4% 287MB/s ± 4% ~ (p=0.195 n=55+53) BM_Parse_Proto2<FileDesc, UseArena, Copy> 566MB/s ± 5% 570MB/s ± 4% ~ (p=0.085 n=59+59) BM_Parse_Proto2<FileDesc, InitBlock, Copy> 583MB/s ± 5% 587MB/s ± 3% +0.64% (p=0.023 n=60+58) BM_Parse_Proto2<FileDescSV, InitBlock, Alias> 688MB/s ± 6% 693MB/s ± 4% ~ (p=0.063 n=59+58) BM_SerializeDescriptor_Proto2 995MB/s ± 6% 988MB/s ± 5% ~ (p=0.147 n=57+58) BM_SerializeDescriptor_Upb 586MB/s ± 4% 589MB/s ± 4% ~ (p=0.163 n=59+56) ``` PiperOrigin-RevId: 462022073	3 years ago
Protobuf Team Bot	8c44f04697	create and lock down upb/internal/array.h Internal array functions are now implemented in upb/internal/array.c and declared in upb/internal/array.h, which only has local visibility. PiperOrigin-RevId: 458260144	3 years ago
Protobuf Team Bot	033859ff5d	rename internal/upb.h as internal/encode.h add build target for upb/internal/encode.h and lock down its visibility PiperOrigin-RevId: 457087638	3 years ago
Protobuf Team Bot	1695cb2788	rename the upb_Array 'len' field as 'size' Now that 'size' has been renamed as 'capacity' we are free to rename 'len' as 'size', so upb_Array_Size() is actually returning the 'size' field. PiperOrigin-RevId: 456865972	3 years ago
Protobuf Team Bot	83f4988561	rename the upb_Array 'size' field as 'capacity' The current field/function names for upb_Array are quite confusing. We will fix them in two steps, this being the first step. PiperOrigin-RevId: 456687224	3 years ago
Protobuf Team Bot	e4635f223e	match file names to type names Lots of changes but it's all just moving things around. Backward-compatible stub #include's have been provided for now. upb_Arena/upb_Status have been split out from upb/upb.? upb_Array/upb_Map/upb_MessageValue have been split out from upb/collections.? upb_ExtensionRegistry has been split out from upb/msg.? upb/decode_internal.h is now upb/internal/decode.h upb/mini_table_accessors_internal.h is now upb/internal/mini_table_accessors.h upb/table_internal.h is now upb/internal/table.h upb/upb_internal.h is now upb/internal/upb.h PiperOrigin-RevId: 456297617	3 years ago
Joshua Haberman	d72d98495d	Fixed a Python test by adding a new map insert function that distinguishes between insert and update. PiperOrigin-RevId: 447214618	3 years ago
Joshua Haberman	4978040db4	Rewrote the MessageSet parsing code in the upb decoder to properly handle several edge cases. PiperOrigin-RevId: 442979459	3 years ago
Joshua Haberman	76c7ca9327	Updated API for accessing extensions. PiperOrigin-RevId: 442947856	3 years ago
Protobuf Team	e1e7435e70	Internal change PiperOrigin-RevId: 440796832	3 years ago
Joshua Haberman	9cc02bb60d	Rewrote the MessageSet parsing code in the upb decoder to properly handle several edge cases. PiperOrigin-RevId: 440788402	3 years ago
Joshua Haberman	bcb08bf9f0	Clang-format.	3 years ago
Joshua Haberman	6509f13568	Reverted extra debug assignment.	3 years ago
Joshua Haberman	1046d778a2	Removed debug print statements.	3 years ago
Joshua Haberman	7d5f4cd9b6	Implemented the functionality to make the test pass.	3 years ago
theodorerose	97273a3638	WIP	3 years ago
Joshua Haberman	532dc1f0f0	Renamed a few more constants to the new style. These are not in the public API and so were not prioritized before. No functional change here, just renames.	3 years ago
Joshua Haberman	826eca6742	Enabled ubsan tests and fixed ubsan failures.	3 years ago
Joshua Haberman	606308c639	Added back missing underscore.	3 years ago

23 Commits (c642e43a5a7b9d1487e7207720bb2f247b2d7b6d)