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Replace experimental_infallible_new with compile-time flag

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The runtime option aborted on every OOM, breaking new(std::nothrow)
semantics. Replace with configure-time --enable-cxx-infallible-new
(default off): when on, throwing new aborts (size logged) and
nothrow returns null; when off, standard new_handler + bad_alloc /
null behavior is preserved. Under LTO the on-path lets the compiler
prove operator new is no-throw.
This commit is contained in:
Slobodan Predolac 2026-06-04 10:58:43 -07:00
parent a6048680a8
commit 160ab9d7f6
19 changed files with 103 additions and 44 deletions
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5
src/conf.c
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@ -731,11 +731,6 @@ malloc_conf_init_helper(sc_data_t *sc_data, unsigned bin_shard_sizes[SC_NBINS],
if (config_xmalloc) {
CONF_HANDLE_BOOL(opt_xmalloc, "xmalloc")
}
if (config_enable_cxx) {
CONF_HANDLE_BOOL(
opt_experimental_infallible_new,
"experimental_infallible_new")
}
CONF_HANDLE_BOOL(opt_experimental_tcache_gc,
"experimental_tcache_gc")