Fix ary_make_partial_step for compaction #1
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ary could change embeddedness due to compaction, so we should only get
the pointer after allocations.
The included test was crashing with:
TestArray#test_slice_gc_compact_stress
ruby/lib/pp.rb:192: [BUG] Segmentation fault at 0x0000000000000038
peterzhu2118
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* YJIT: A64: Use ADDS/SUBS/CMP (immediate) when possible We were loading 1 into a register and then doing ADDS/SUBS previously. That was particularly bad since those come up in fixnum operations. ```diff # integer left shift with rhs=1 - mov x11, #1 - subs x11, x1, x11 + subs x11, x1, #1 lsl x12, x11, #1 asr x13, x12, #1 cmp x13, x11 - b.ne #0x106ab60f8 - mov x11, #1 - adds x12, x12, x11 + b.ne #0x10903a0f8 + adds x12, x12, #1 mov x1, x12 ``` Note that it's fine to cast between i64 and u64 since the bit pattern is preserved, and the add/sub themselves don't care about the signedness of the operands. CMP is just another mnemonic for SUBS. * YJIT: A64: Split asm.mul() with immediates properly There is in fact no MUL on A64 that takes an immediate, so this instruction was using the wrong split method. No current usages of this form in YJIT. --------- Co-authored-by: Maxime Chevalier-Boisvert <maxime.chevalierboisvert@shopify.com>
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When Ruby is built with ASAN and RUBY_FREE_AT_EXIT is enabled, the
following error occurs:
READ of size 8 at 0x74c666610020 thread T0
#0 0x593b6712ecc6 in RB_BUILTIN_TYPE include/ruby/internal/value_type.h:191:30
#1 0x593b6712ecc6 in rb_gc_impl_shutdown_free_objects gc_impl.c:3208:17
ruby#2 0x593b6749a62e in ruby_vm_destruct vm.c:3133:17
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ary could change embeddedness due to compaction, so we should only get the pointer after allocations.
The included test was crashing with: