Fix stack object finalizer liveness#1906

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cpunion wants to merge 53 commits into

xgo-dev:mainfrom

cpunion:codex/goroot-stackobj-coverage

Commits on Jul 1, 2026

Commits on Jul 2, 2026

runtime: use static funcinfo symbol index
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benchmark: add runtime funcinfo benchmark harness

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build,cl: emit funcinfo site sections on Mach-O

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runtime: cut funcinfo first-use latency and index degradation

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runtime: memoize synthetic PCs in Caller/Callers hot paths

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runtime: reuse FuncForPC cache in Frames.Next; document LTO inline-copy limit

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build: document why body-embedded site records resist LTO dedup

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doc: design for link-phase ftab/findfunctab generation

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runtime: nanosecond monotonic clock on darwin and linux

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build: disable funcinfo metadata emission in debug builds

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build,ssa,cl: gate only site records off in debug builds

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runtime: keep unresolved-entry frames out of the FuncForPC cache

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build: add LLGO_FUNCINFO_SITES to toggle site records independently

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chore/pclnpost: link-phase ftab prototype (P1)

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runtime,chore/pclnpost: P2 — prebuilt table write-back and zero-copy adoption

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build,runtime,pclnpost: P2 complete — automatic link-phase functab

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pclnpost: resolve Mach-O bind-encoded site records into the prebuilt table

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benchmark: add plain ordinary-code scenario to runtime_funcinfo

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doc: record P3 findings in pclntab-linkphase design

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benchmark: keep full LTO from constant-folding the plain fib probe

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runtime: pre-warm the prebuilt function table at startup

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benchmark: scale dimensions — call depth and big-method scenarios

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fix stack object finalizer liveness
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runtime: expose Linux pthread stack APIs
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runtime: limit stack liveness helpers to finalizer programs
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test: cover stack liveness planning
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test: find liveness allocs in SSA blocks
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test: cover conservative liveness branches
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test: cover liveness helper fallbacks
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ssa: rebuild struct load-and-clear values
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test: cover liveness edge cases
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