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| author | Adhemerval Zanella <adhemerval.zanella@linaro.org> | 2022-09-20 16:04:13 -0300 |
|---|---|---|
| committer | Adhemerval Zanella <adhemerval.zanella@linaro.org> | 2022-09-21 10:57:47 -0300 |
| commit | fd36873ff9d766f5095d81bdfba900adfff5f784 (patch) | |
| tree | dc8daf2a8a0e0779ca27ebb137cdb369c08032dd /elf/dl-profile.c | |
| parent | c0c9092f758d3734fd6bb3f63c6cd0c4fd464a51 (diff) | |
| download | glibc-fd36873ff9d766f5095d81bdfba900adfff5f784.tar.gz glibc-fd36873ff9d766f5095d81bdfba900adfff5f784.tar.xz glibc-fd36873ff9d766f5095d81bdfba900adfff5f784.zip | |
elf: Use C11 atomics on _dl_mcount
All atomic operation are counters, so relaxed MO should be suffice. Checked on x86_64-linux-gnu. Reviewed-by: Wilco Dijkstra <Wilco.Dijkstra@arm.com>
Diffstat (limited to 'elf/dl-profile.c')
| -rw-r--r-- | elf/dl-profile.c | 10 |
1 files changed, 5 insertions, 5 deletions
diff --git a/elf/dl-profile.c b/elf/dl-profile.c index ec57e3a965..96ba606724 100644 --- a/elf/dl-profile.c +++ b/elf/dl-profile.c @@ -548,7 +548,7 @@ _dl_mcount (ElfW(Addr) frompc, ElfW(Addr) selfpc) size_t newfromidx; to_index = (data[narcs].self_pc / (HASHFRACTION * sizeof (*tos))); - newfromidx = catomic_exchange_and_add (&fromidx, 1) + 1; + newfromidx = atomic_fetch_add_relaxed (&fromidx, 1) + 1; froms[newfromidx].here = &data[narcs]; froms[newfromidx].link = tos[to_index]; tos[to_index] = newfromidx; @@ -558,14 +558,14 @@ _dl_mcount (ElfW(Addr) frompc, ElfW(Addr) selfpc) /* If we still have no entry stop searching and insert. */ if (*topcindex == 0) { - unsigned int newarc = catomic_exchange_and_add (narcsp, 1); + unsigned int newarc = atomic_fetch_add_relaxed (narcsp, 1); /* In rare cases it could happen that all entries in FROMS are occupied. So we cannot count this anymore. */ if (newarc >= fromlimit) goto done; - *topcindex = catomic_exchange_and_add (&fromidx, 1) + 1; + *topcindex = atomic_fetch_add_relaxed (&fromidx, 1) + 1; fromp = &froms[*topcindex]; fromp->here = &data[newarc]; @@ -573,7 +573,7 @@ _dl_mcount (ElfW(Addr) frompc, ElfW(Addr) selfpc) data[newarc].self_pc = selfpc; data[newarc].count = 0; fromp->link = 0; - catomic_increment (&narcs); + atomic_fetch_add_relaxed (&narcs, 1); break; } @@ -586,7 +586,7 @@ _dl_mcount (ElfW(Addr) frompc, ElfW(Addr) selfpc) } /* Increment the counter. */ - catomic_increment (&fromp->here->count); + atomic_fetch_add_relaxed (&fromp->here->count, 1); done: ; |