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54 lines
1.6 KiB
Diff
54 lines
1.6 KiB
Diff
From 0000000000000000000000000000000000000000 Mon Sep 17 00:00:00 2001
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From: Tim Murray <timmurray@google.com>
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Date: Mon, 15 Oct 2018 16:26:56 -0700
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Subject: [PATCH] malloc: add M_PURGE mallopt flag
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Add a new mallopt flag that purges any pending decaying pages.
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Test: boots and works
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bug 117795621
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Merged-in: Ib250ae2b705b6a368c1efb801d6a7be54e075acb
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Change-Id: Ib250ae2b705b6a368c1efb801d6a7be54e075acb
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(cherry picked from commit 8a07791fbff0dd014ce5da8d88969d09cd3dcf0b)
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---
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libc/bionic/jemalloc_wrapper.cpp | 12 ++++++++++++
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libc/include/malloc.h | 1 +
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2 files changed, 13 insertions(+)
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diff --git a/libc/bionic/jemalloc_wrapper.cpp b/libc/bionic/jemalloc_wrapper.cpp
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index 266b9660c..b4678d008 100644
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--- a/libc/bionic/jemalloc_wrapper.cpp
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+++ b/libc/bionic/jemalloc_wrapper.cpp
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@@ -79,6 +79,18 @@ int je_mallopt(int param, int value) {
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}
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}
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return 1;
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+ } else if (param == M_PURGE) {
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+ unsigned narenas;
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+ size_t sz = sizeof(unsigned);
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+ if (je_mallctl("arenas.narenas", &narenas, &sz, nullptr, 0) != 0) {
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+ return 0;
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+ }
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+ char buffer[100];
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+ snprintf(buffer, sizeof(buffer), "arena.%u.purge", narenas);
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+ if (je_mallctl(buffer, nullptr, nullptr, nullptr, 0) != 0) {
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+ return 0;
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+ }
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+ return 1;
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}
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return 0;
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}
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diff --git a/libc/include/malloc.h b/libc/include/malloc.h
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index db5da04c5..9a30b35b7 100644
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--- a/libc/include/malloc.h
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+++ b/libc/include/malloc.h
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@@ -79,6 +79,7 @@ int malloc_info(int, FILE*) __INTRODUCED_IN(23);
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/* mallopt options */
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#define M_DECAY_TIME -100
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+#define M_PURGE -101
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int mallopt(int, int) __INTRODUCED_IN(26);
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