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Move malloc routing into new malloc_dispatch module

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Pull the tcache-aware allocation routing helpers out of arena into a
layer that sits directly below the public malloc interface:

  arena_malloc          -> malloc_dispatch_malloc
  arena_palloc          -> malloc_dispatch_palloc
  arena_ralloc          -> malloc_dispatch_ralloc
  arena_dalloc*         -> malloc_dispatch_dalloc*
  arena_sdalloc*        -> malloc_dispatch_sdalloc*
  arena_dalloc_promoted -> malloc_dispatch_dalloc_promoted

These helpers decide whether to route through tcache or fall through to
arena/large fast paths.  They are now owned by malloc_dispatch_inlines.h
+ src/malloc_dispatch.c, and the only consumers are the public-front-end
wrappers in jemalloc_internal_inlines_c.h.

arena keeps a narrower arena_prof_demote() helper for the sampled
allocation demotion + redzone verification it used to perform inline.
arena_inlines_b.h no longer includes tcache_inlines.h -- the symbol
level arena <-> tcache cycle is gone (it's now in malloc_dispatch).
This commit is contained in:
Slobodan Predolac 2026-05-28 19:01:19 -04:00 • committed by Slobodan Predolac
parent 1cc0e4a838
commit e2c0f07a7e
17 changed files with 442 additions and 385 deletions
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Makefile.in
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@ -132,6 +132,7 @@ C_SRCS := $(srcroot)src/jemalloc.c \
$(srcroot)src/inspect.c \
$(srcroot)src/large.c \
$(srcroot)src/log.c \
$(srcroot)src/malloc_dispatch.c \
$(srcroot)src/malloc_io.c \
$(srcroot)src/conf.c \
$(srcroot)src/mutex.c \