c67c3e4a63
Control use of munmap(2) via a run-time option rather than a compile-time option (with the same per platform default). The old behavior of --disable-munmap can be achieved with --with-malloc-conf=munmap:false. This partially resolves #580.
333 lines
8.2 KiB
C
333 lines
8.2 KiB
C
#ifndef ARENA_RESET_PROF_C_
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#include "test/jemalloc_test.h"
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#endif
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#include "test/extent_hooks.h"
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static unsigned
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get_nsizes_impl(const char *cmd) {
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unsigned ret;
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size_t z;
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z = sizeof(unsigned);
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assert_d_eq(mallctl(cmd, (void *)&ret, &z, NULL, 0), 0,
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"Unexpected mallctl(\"%s\", ...) failure", cmd);
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return ret;
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}
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static unsigned
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get_nsmall(void) {
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return get_nsizes_impl("arenas.nbins");
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}
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static unsigned
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get_nlarge(void) {
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return get_nsizes_impl("arenas.nlextents");
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}
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static size_t
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get_size_impl(const char *cmd, size_t ind) {
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size_t ret;
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size_t z;
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size_t mib[4];
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size_t miblen = 4;
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z = sizeof(size_t);
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assert_d_eq(mallctlnametomib(cmd, mib, &miblen),
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0, "Unexpected mallctlnametomib(\"%s\", ...) failure", cmd);
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mib[2] = ind;
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z = sizeof(size_t);
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assert_d_eq(mallctlbymib(mib, miblen, (void *)&ret, &z, NULL, 0),
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0, "Unexpected mallctlbymib([\"%s\", %zu], ...) failure", cmd, ind);
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return ret;
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}
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static size_t
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get_small_size(size_t ind) {
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return get_size_impl("arenas.bin.0.size", ind);
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}
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static size_t
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get_large_size(size_t ind) {
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return get_size_impl("arenas.lextent.0.size", ind);
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}
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/* Like ivsalloc(), but safe to call on discarded allocations. */
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static size_t
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vsalloc(tsdn_t *tsdn, const void *ptr) {
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rtree_ctx_t rtree_ctx_fallback;
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rtree_ctx_t *rtree_ctx = tsdn_rtree_ctx(tsdn, &rtree_ctx_fallback);
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extent_t *extent;
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szind_t szind;
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if (rtree_extent_szind_read(tsdn, &extents_rtree, rtree_ctx,
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(uintptr_t)ptr, false, &extent, &szind)) {
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return 0;
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}
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if (extent == NULL) {
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return 0;
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}
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if (extent_state_get(extent) != extent_state_active) {
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return 0;
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}
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if (szind == NSIZES) {
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return 0;
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}
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return index2size(szind);
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}
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static unsigned
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do_arena_create(extent_hooks_t *h) {
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unsigned arena_ind;
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size_t sz = sizeof(unsigned);
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assert_d_eq(mallctl("arenas.create", (void *)&arena_ind, &sz,
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(void *)(h != NULL ? &h : NULL), (h != NULL ? sizeof(h) : 0)), 0,
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"Unexpected mallctl() failure");
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return arena_ind;
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}
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static void
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do_arena_reset_pre(unsigned arena_ind, void ***ptrs, unsigned *nptrs) {
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#define NLARGE 32
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unsigned nsmall, nlarge, i;
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size_t sz;
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int flags;
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tsdn_t *tsdn;
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flags = MALLOCX_ARENA(arena_ind) | MALLOCX_TCACHE_NONE;
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nsmall = get_nsmall();
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nlarge = get_nlarge() > NLARGE ? NLARGE : get_nlarge();
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*nptrs = nsmall + nlarge;
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*ptrs = (void **)malloc(*nptrs * sizeof(void *));
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assert_ptr_not_null(*ptrs, "Unexpected malloc() failure");
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/* Allocate objects with a wide range of sizes. */
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for (i = 0; i < nsmall; i++) {
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sz = get_small_size(i);
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(*ptrs)[i] = mallocx(sz, flags);
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assert_ptr_not_null((*ptrs)[i],
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"Unexpected mallocx(%zu, %#x) failure", sz, flags);
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}
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for (i = 0; i < nlarge; i++) {
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sz = get_large_size(i);
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(*ptrs)[nsmall + i] = mallocx(sz, flags);
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assert_ptr_not_null((*ptrs)[i],
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"Unexpected mallocx(%zu, %#x) failure", sz, flags);
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}
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tsdn = tsdn_fetch();
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/* Verify allocations. */
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for (i = 0; i < *nptrs; i++) {
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assert_zu_gt(ivsalloc(tsdn, (*ptrs)[i]), 0,
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"Allocation should have queryable size");
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}
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}
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static void
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do_arena_reset_post(void **ptrs, unsigned nptrs) {
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tsdn_t *tsdn;
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unsigned i;
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tsdn = tsdn_fetch();
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/* Verify allocations no longer exist. */
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for (i = 0; i < nptrs; i++) {
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assert_zu_eq(vsalloc(tsdn, ptrs[i]), 0,
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"Allocation should no longer exist");
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}
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free(ptrs);
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}
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static void
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do_arena_reset_destroy(const char *name, unsigned arena_ind) {
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size_t mib[3];
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size_t miblen;
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miblen = sizeof(mib)/sizeof(size_t);
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assert_d_eq(mallctlnametomib(name, mib, &miblen), 0,
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"Unexpected mallctlnametomib() failure");
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mib[1] = (size_t)arena_ind;
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assert_d_eq(mallctlbymib(mib, miblen, NULL, NULL, NULL, 0), 0,
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"Unexpected mallctlbymib() failure");
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}
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static void
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do_arena_reset(unsigned arena_ind) {
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do_arena_reset_destroy("arena.0.reset", arena_ind);
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}
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static void
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do_arena_destroy(unsigned arena_ind) {
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do_arena_reset_destroy("arena.0.destroy", arena_ind);
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}
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TEST_BEGIN(test_arena_reset) {
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unsigned arena_ind;
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void **ptrs;
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unsigned nptrs;
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arena_ind = do_arena_create(NULL);
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do_arena_reset_pre(arena_ind, &ptrs, &nptrs);
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do_arena_reset(arena_ind);
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do_arena_reset_post(ptrs, nptrs);
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}
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TEST_END
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static bool
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arena_i_initialized(unsigned arena_ind, bool refresh) {
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bool initialized;
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size_t mib[3];
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size_t miblen, sz;
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if (refresh) {
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uint64_t epoch = 1;
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assert_d_eq(mallctl("epoch", NULL, NULL, (void *)&epoch,
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sizeof(epoch)), 0, "Unexpected mallctl() failure");
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}
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miblen = sizeof(mib)/sizeof(size_t);
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assert_d_eq(mallctlnametomib("arena.0.initialized", mib, &miblen), 0,
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"Unexpected mallctlnametomib() failure");
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mib[1] = (size_t)arena_ind;
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sz = sizeof(initialized);
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assert_d_eq(mallctlbymib(mib, miblen, (void *)&initialized, &sz, NULL,
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0), 0, "Unexpected mallctlbymib() failure");
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return initialized;
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}
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TEST_BEGIN(test_arena_destroy_initial) {
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assert_false(arena_i_initialized(MALLCTL_ARENAS_DESTROYED, false),
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"Destroyed arena stats should not be initialized");
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}
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TEST_END
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TEST_BEGIN(test_arena_destroy_hooks_default) {
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unsigned arena_ind, arena_ind_another, arena_ind_prev;
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void **ptrs;
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unsigned nptrs;
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arena_ind = do_arena_create(NULL);
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do_arena_reset_pre(arena_ind, &ptrs, &nptrs);
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assert_false(arena_i_initialized(arena_ind, false),
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"Arena stats should not be initialized");
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assert_true(arena_i_initialized(arena_ind, true),
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"Arena stats should be initialized");
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/*
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* Create another arena before destroying one, to better verify arena
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* index reuse.
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*/
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arena_ind_another = do_arena_create(NULL);
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do_arena_destroy(arena_ind);
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assert_false(arena_i_initialized(arena_ind, true),
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"Arena stats should not be initialized");
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assert_true(arena_i_initialized(MALLCTL_ARENAS_DESTROYED, false),
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"Destroyed arena stats should be initialized");
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do_arena_reset_post(ptrs, nptrs);
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arena_ind_prev = arena_ind;
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arena_ind = do_arena_create(NULL);
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do_arena_reset_pre(arena_ind, &ptrs, &nptrs);
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assert_u_eq(arena_ind, arena_ind_prev,
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"Arena index should have been recycled");
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do_arena_destroy(arena_ind);
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do_arena_reset_post(ptrs, nptrs);
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do_arena_destroy(arena_ind_another);
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}
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TEST_END
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/*
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* Actually unmap extents, regardless of opt_munmap, so that attempts to access
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* a destroyed arena's memory will segfault.
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*/
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static bool
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extent_dalloc_unmap(extent_hooks_t *extent_hooks, void *addr, size_t size,
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bool committed, unsigned arena_ind) {
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TRACE_HOOK("%s(extent_hooks=%p, addr=%p, size=%zu, committed=%s, "
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"arena_ind=%u)\n", __func__, extent_hooks, addr, size, committed ?
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"true" : "false", arena_ind);
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assert_ptr_eq(extent_hooks, &hooks,
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"extent_hooks should be same as pointer used to set hooks");
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assert_ptr_eq(extent_hooks->dalloc, extent_dalloc_unmap,
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"Wrong hook function");
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called_dalloc = true;
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if (!try_dalloc) {
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return true;
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}
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pages_unmap(addr, size);
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did_dalloc = true;
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return false;
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}
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static extent_hooks_t hooks_orig;
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static extent_hooks_t hooks_unmap = {
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extent_alloc_hook,
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extent_dalloc_unmap, /* dalloc */
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extent_commit_hook,
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extent_decommit_hook,
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extent_purge_lazy_hook,
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extent_purge_forced_hook,
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extent_split_hook,
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extent_merge_hook
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};
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TEST_BEGIN(test_arena_destroy_hooks_unmap) {
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unsigned arena_ind;
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void **ptrs;
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unsigned nptrs;
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extent_hooks_prep();
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try_decommit = false;
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memcpy(&hooks_orig, &hooks, sizeof(extent_hooks_t));
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memcpy(&hooks, &hooks_unmap, sizeof(extent_hooks_t));
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did_alloc = false;
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arena_ind = do_arena_create(&hooks);
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do_arena_reset_pre(arena_ind, &ptrs, &nptrs);
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assert_true(did_alloc, "Expected alloc");
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assert_false(arena_i_initialized(arena_ind, false),
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"Arena stats should not be initialized");
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assert_true(arena_i_initialized(arena_ind, true),
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"Arena stats should be initialized");
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did_dalloc = false;
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do_arena_destroy(arena_ind);
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assert_true(did_dalloc, "Expected dalloc");
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assert_false(arena_i_initialized(arena_ind, true),
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"Arena stats should not be initialized");
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assert_true(arena_i_initialized(MALLCTL_ARENAS_DESTROYED, false),
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"Destroyed arena stats should be initialized");
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do_arena_reset_post(ptrs, nptrs);
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memcpy(&hooks, &hooks_orig, sizeof(extent_hooks_t));
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}
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TEST_END
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int
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main(void) {
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return test(
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test_arena_reset,
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test_arena_destroy_initial,
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test_arena_destroy_hooks_default,
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test_arena_destroy_hooks_unmap);
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}
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