pitrou commented on PR #41128:
URL: https://github.com/apache/arrow/pull/41128#issuecomment-2048004896
Interestingly, the binary wheels built in the Crossbow builds above use a
slightly indirection code:
```
0000000001476850
<_ZN5arrow18BaseMemoryPoolImplINS_12_GLOBAL__N_117MimallocAllocatorEE4FreeEPhll>:
1476850: 55 push %rbp
1476851: 48 89 d5 mov %rdx,%rbp
1476854: 53 push %rbx
1476855: 48 89 fb mov %rdi,%rbx
1476858: 48 83 ec 08 sub $0x8,%rsp
147685c: 48 3b 35 05 5c 9d 01 cmp 0x19d5c05(%rip),%rsi #
2e4c468 <_ZN5arrow11memory_pool8internal14zero_size_areaE@@Base-0x10898>
1476863: 74 08 je 147686d
<_ZN5arrow18BaseMemoryPoolImplINS_12_GLOBAL__N_117MimallocAllocatorEE4FreeEPhll+0x1d>
1476865: 48 89 f7 mov %rsi,%rdi
1476868: e8 13 56 02 ff call 49be80 <arrow_mi_free@plt>
147686d: f0 48 29 6b 48 lock sub %rbp,0x48(%rbx)
1476872: 48 83 c4 08 add $0x8,%rsp
1476876: 5b pop %rbx
1476877: 5d pop %rbp
1476878: c3 ret
```
I've checked that `LD_PRELOAD` still works to interpose these functions
(`arrow_mi_free` etc.).
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