Avoid using a union for ctl_node_s
MSVC doesn't support C99, and as such doesn't support designated initialization of structs and unions. As there is never a mix of indexed and named nodes, it is pretty straightforward to use a different type for each.
This commit is contained in:
Mike Hommey
Jason Evans
parent
40f514fd92
commit
461ad5c87a
@ -2,6 +2,8 @@
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#ifdef JEMALLOC_H_TYPES
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typedef struct ctl_node_s ctl_node_t;
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typedef struct ctl_named_node_s ctl_named_node_t;
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typedef struct ctl_indexed_node_s ctl_indexed_node_t;
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typedef struct ctl_arena_stats_s ctl_arena_stats_t;
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typedef struct ctl_stats_s ctl_stats_t;
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@ -11,22 +13,23 @@ typedef struct ctl_stats_s ctl_stats_t;
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struct ctl_node_s {
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bool named;
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union {
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struct {
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const char *name;
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/* If (nchildren == 0), this is a terminal node. */
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unsigned nchildren;
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const ctl_node_t *children;
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} named;
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struct {
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const ctl_node_t *(*index)(const size_t *, size_t,
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size_t);
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} indexed;
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} u;
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};
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struct ctl_named_node_s {
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struct ctl_node_s node;
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const char *name;
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/* If (nchildren == 0), this is a terminal node. */
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unsigned nchildren;
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const ctl_node_t *children;
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int (*ctl)(const size_t *, size_t, void *, size_t *, void *,
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size_t);
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};
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struct ctl_indexed_node_s {
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struct ctl_node_s node;
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const ctl_named_node_t *(*index)(const size_t *, size_t, size_t);
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};
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struct ctl_arena_stats_s {
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bool initialized;
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unsigned nthreads;
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168
src/ctl.c
168
src/ctl.c
@ -14,6 +14,32 @@ static bool ctl_initialized;
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static uint64_t ctl_epoch;
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static ctl_stats_t ctl_stats;
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/******************************************************************************/
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/* Helpers for named and indexed nodes. */
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static inline const ctl_named_node_t *
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ctl_named_node(const ctl_node_t *node)
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{
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return ((node->named) ? (const ctl_named_node_t *)node : NULL);
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}
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static inline const ctl_named_node_t *
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ctl_named_children(const ctl_named_node_t *node, int index)
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{
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const ctl_named_node_t *children = ctl_named_node(node->children);
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return (children ? &children[index] : NULL);
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}
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static inline const ctl_indexed_node_t *
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ctl_indexed_node(const ctl_node_t *node)
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{
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return ((node->named == false) ? (const ctl_indexed_node_t *)node :
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NULL);
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}
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/******************************************************************************/
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/* Function prototypes for non-inline static functions. */
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@ -22,7 +48,7 @@ static int n##_ctl(const size_t *mib, size_t miblen, void *oldp, \
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size_t *oldlenp, void *newp, size_t newlen);
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#define INDEX_PROTO(n) \
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const ctl_node_t *n##_index(const size_t *mib, size_t miblen, \
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const ctl_named_node_t *n##_index(const size_t *mib, size_t miblen, \
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size_t i);
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static bool ctl_arena_init(ctl_arena_stats_t *astats);
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@ -149,22 +175,23 @@ CTL_PROTO(stats_mapped)
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/* Maximum tree depth. */
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#define CTL_MAX_DEPTH 6
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#define NAME(n) true, {.named = {n
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#define CHILD(c) sizeof(c##_node) / sizeof(ctl_node_t), c##_node}}, NULL
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#define CTL(c) 0, NULL}}, c##_ctl
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#define NAME(n) {true}, n
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#define CHILD(c) \
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sizeof(c##_node) / sizeof(ctl_node_t), (ctl_node_t *)c##_node, NULL
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#define CTL(c) 0, NULL, c##_ctl
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/*
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* Only handles internal indexed nodes, since there are currently no external
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* ones.
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*/
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#define INDEX(i) false, {.indexed = {i##_index}}, NULL
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#define INDEX(i) {false}, i##_index
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static const ctl_node_t tcache_node[] = {
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static const ctl_named_node_t tcache_node[] = {
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{NAME("enabled"), CTL(thread_tcache_enabled)},
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{NAME("flush"), CTL(thread_tcache_flush)}
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};
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static const ctl_node_t thread_node[] = {
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static const ctl_named_node_t thread_node[] = {
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{NAME("arena"), CTL(thread_arena)},
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{NAME("allocated"), CTL(thread_allocated)},
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{NAME("allocatedp"), CTL(thread_allocatedp)},
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@ -173,7 +200,7 @@ static const ctl_node_t thread_node[] = {
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{NAME("tcache"), CHILD(tcache)}
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};
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static const ctl_node_t config_node[] = {
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static const ctl_named_node_t config_node[] = {
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{NAME("debug"), CTL(config_debug)},
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{NAME("dss"), CTL(config_dss)},
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{NAME("fill"), CTL(config_fill)},
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@ -190,7 +217,7 @@ static const ctl_node_t config_node[] = {
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{NAME("xmalloc"), CTL(config_xmalloc)}
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};
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static const ctl_node_t opt_node[] = {
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static const ctl_named_node_t opt_node[] = {
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{NAME("abort"), CTL(opt_abort)},
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{NAME("lg_chunk"), CTL(opt_lg_chunk)},
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{NAME("narenas"), CTL(opt_narenas)},
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@ -216,31 +243,31 @@ static const ctl_node_t opt_node[] = {
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{NAME("prof_accum"), CTL(opt_prof_accum)}
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};
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static const ctl_node_t arenas_bin_i_node[] = {
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static const ctl_named_node_t arenas_bin_i_node[] = {
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{NAME("size"), CTL(arenas_bin_i_size)},
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{NAME("nregs"), CTL(arenas_bin_i_nregs)},
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{NAME("run_size"), CTL(arenas_bin_i_run_size)}
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};
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static const ctl_node_t super_arenas_bin_i_node[] = {
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static const ctl_named_node_t super_arenas_bin_i_node[] = {
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{NAME(""), CHILD(arenas_bin_i)}
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};
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static const ctl_node_t arenas_bin_node[] = {
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static const ctl_indexed_node_t arenas_bin_node[] = {
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{INDEX(arenas_bin_i)}
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};
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static const ctl_node_t arenas_lrun_i_node[] = {
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static const ctl_named_node_t arenas_lrun_i_node[] = {
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{NAME("size"), CTL(arenas_lrun_i_size)}
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};
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static const ctl_node_t super_arenas_lrun_i_node[] = {
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static const ctl_named_node_t super_arenas_lrun_i_node[] = {
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{NAME(""), CHILD(arenas_lrun_i)}
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};
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static const ctl_node_t arenas_lrun_node[] = {
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static const ctl_indexed_node_t arenas_lrun_node[] = {
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{INDEX(arenas_lrun_i)}
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};
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static const ctl_node_t arenas_node[] = {
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static const ctl_named_node_t arenas_node[] = {
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{NAME("narenas"), CTL(arenas_narenas)},
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{NAME("initialized"), CTL(arenas_initialized)},
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{NAME("quantum"), CTL(arenas_quantum)},
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@ -254,39 +281,39 @@ static const ctl_node_t arenas_node[] = {
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{NAME("purge"), CTL(arenas_purge)}
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};
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static const ctl_node_t prof_node[] = {
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static const ctl_named_node_t prof_node[] = {
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{NAME("active"), CTL(prof_active)},
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{NAME("dump"), CTL(prof_dump)},
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{NAME("interval"), CTL(prof_interval)}
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};
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static const ctl_node_t stats_chunks_node[] = {
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static const ctl_named_node_t stats_chunks_node[] = {
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{NAME("current"), CTL(stats_chunks_current)},
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{NAME("total"), CTL(stats_chunks_total)},
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{NAME("high"), CTL(stats_chunks_high)}
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};
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static const ctl_node_t stats_huge_node[] = {
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static const ctl_named_node_t stats_huge_node[] = {
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{NAME("allocated"), CTL(stats_huge_allocated)},
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{NAME("nmalloc"), CTL(stats_huge_nmalloc)},
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{NAME("ndalloc"), CTL(stats_huge_ndalloc)}
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};
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static const ctl_node_t stats_arenas_i_small_node[] = {
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static const ctl_named_node_t stats_arenas_i_small_node[] = {
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{NAME("allocated"), CTL(stats_arenas_i_small_allocated)},
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{NAME("nmalloc"), CTL(stats_arenas_i_small_nmalloc)},
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{NAME("ndalloc"), CTL(stats_arenas_i_small_ndalloc)},
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{NAME("nrequests"), CTL(stats_arenas_i_small_nrequests)}
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};
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static const ctl_node_t stats_arenas_i_large_node[] = {
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static const ctl_named_node_t stats_arenas_i_large_node[] = {
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{NAME("allocated"), CTL(stats_arenas_i_large_allocated)},
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{NAME("nmalloc"), CTL(stats_arenas_i_large_nmalloc)},
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{NAME("ndalloc"), CTL(stats_arenas_i_large_ndalloc)},
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{NAME("nrequests"), CTL(stats_arenas_i_large_nrequests)}
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};
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static const ctl_node_t stats_arenas_i_bins_j_node[] = {
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static const ctl_named_node_t stats_arenas_i_bins_j_node[] = {
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{NAME("allocated"), CTL(stats_arenas_i_bins_j_allocated)},
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{NAME("nmalloc"), CTL(stats_arenas_i_bins_j_nmalloc)},
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{NAME("ndalloc"), CTL(stats_arenas_i_bins_j_ndalloc)},
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@ -297,29 +324,29 @@ static const ctl_node_t stats_arenas_i_bins_j_node[] = {
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{NAME("nreruns"), CTL(stats_arenas_i_bins_j_nreruns)},
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{NAME("curruns"), CTL(stats_arenas_i_bins_j_curruns)}
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};
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static const ctl_node_t super_stats_arenas_i_bins_j_node[] = {
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static const ctl_named_node_t super_stats_arenas_i_bins_j_node[] = {
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{NAME(""), CHILD(stats_arenas_i_bins_j)}
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};
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static const ctl_node_t stats_arenas_i_bins_node[] = {
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static const ctl_indexed_node_t stats_arenas_i_bins_node[] = {
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{INDEX(stats_arenas_i_bins_j)}
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};
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static const ctl_node_t stats_arenas_i_lruns_j_node[] = {
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static const ctl_named_node_t stats_arenas_i_lruns_j_node[] = {
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{NAME("nmalloc"), CTL(stats_arenas_i_lruns_j_nmalloc)},
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{NAME("ndalloc"), CTL(stats_arenas_i_lruns_j_ndalloc)},
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{NAME("nrequests"), CTL(stats_arenas_i_lruns_j_nrequests)},
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{NAME("curruns"), CTL(stats_arenas_i_lruns_j_curruns)}
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};
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static const ctl_node_t super_stats_arenas_i_lruns_j_node[] = {
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static const ctl_named_node_t super_stats_arenas_i_lruns_j_node[] = {
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{NAME(""), CHILD(stats_arenas_i_lruns_j)}
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};
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static const ctl_node_t stats_arenas_i_lruns_node[] = {
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static const ctl_indexed_node_t stats_arenas_i_lruns_node[] = {
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{INDEX(stats_arenas_i_lruns_j)}
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};
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static const ctl_node_t stats_arenas_i_node[] = {
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static const ctl_named_node_t stats_arenas_i_node[] = {
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{NAME("nthreads"), CTL(stats_arenas_i_nthreads)},
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{NAME("pactive"), CTL(stats_arenas_i_pactive)},
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{NAME("pdirty"), CTL(stats_arenas_i_pdirty)},
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@ -332,15 +359,15 @@ static const ctl_node_t stats_arenas_i_node[] = {
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{NAME("bins"), CHILD(stats_arenas_i_bins)},
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{NAME("lruns"), CHILD(stats_arenas_i_lruns)}
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};
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static const ctl_node_t super_stats_arenas_i_node[] = {
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static const ctl_named_node_t super_stats_arenas_i_node[] = {
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{NAME(""), CHILD(stats_arenas_i)}
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};
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static const ctl_node_t stats_arenas_node[] = {
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static const ctl_indexed_node_t stats_arenas_node[] = {
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{INDEX(stats_arenas_i)}
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};
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static const ctl_node_t stats_node[] = {
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static const ctl_named_node_t stats_node[] = {
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{NAME("cactive"), CTL(stats_cactive)},
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{NAME("allocated"), CTL(stats_allocated)},
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{NAME("active"), CTL(stats_active)},
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@ -350,7 +377,7 @@ static const ctl_node_t stats_node[] = {
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{NAME("arenas"), CHILD(stats_arenas)}
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};
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static const ctl_node_t root_node[] = {
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static const ctl_named_node_t root_node[] = {
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{NAME("version"), CTL(version)},
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{NAME("epoch"), CTL(epoch)},
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{NAME("thread"), CHILD(thread)},
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@ -360,7 +387,7 @@ static const ctl_node_t root_node[] = {
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{NAME("prof"), CHILD(prof)},
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{NAME("stats"), CHILD(stats)}
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};
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static const ctl_node_t super_root_node[] = {
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static const ctl_named_node_t super_root_node[] = {
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{NAME(""), CHILD(root)}
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};
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@ -597,7 +624,7 @@ ctl_lookup(const char *name, ctl_node_t const **nodesp, size_t *mibp,
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int ret;
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const char *elm, *tdot, *dot;
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size_t elen, i, j;
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const ctl_node_t *node;
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const ctl_named_node_t *node;
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elm = name;
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/* Equivalent to strchrnul(). */
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@ -609,21 +636,21 @@ ctl_lookup(const char *name, ctl_node_t const **nodesp, size_t *mibp,
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}
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node = super_root_node;
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for (i = 0; i < *depthp; i++) {
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assert(node->named);
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assert(node->u.named.nchildren > 0);
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if (node->u.named.children[0].named) {
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const ctl_node_t *pnode = node;
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assert(node);
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assert(node->nchildren > 0);
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if (ctl_named_node(node->children) != NULL) {
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const ctl_named_node_t *pnode = node;
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/* Children are named. */
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for (j = 0; j < node->u.named.nchildren; j++) {
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const ctl_node_t *child =
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&node->u.named.children[j];
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if (strlen(child->u.named.name) == elen
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&& strncmp(elm, child->u.named.name,
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elen) == 0) {
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for (j = 0; j < node->nchildren; j++) {
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const ctl_named_node_t *child =
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ctl_named_children(node, j);
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if (strlen(child->name) == elen &&
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strncmp(elm, child->name, elen) == 0) {
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node = child;
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if (nodesp != NULL)
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nodesp[i] = node;
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nodesp[i] =
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(const ctl_node_t *)node;
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mibp[i] = j;
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break;
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}
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@ -634,7 +661,7 @@ ctl_lookup(const char *name, ctl_node_t const **nodesp, size_t *mibp,
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}
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} else {
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uintmax_t index;
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const ctl_node_t *inode;
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const ctl_indexed_node_t *inode;
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/* Children are indexed. */
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index = malloc_strtoumax(elm, NULL, 10);
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@ -643,16 +670,15 @@ ctl_lookup(const char *name, ctl_node_t const **nodesp, size_t *mibp,
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goto label_return;
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}
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inode = &node->u.named.children[0];
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node = inode->u.indexed.index(mibp, *depthp,
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(size_t)index);
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inode = ctl_indexed_node(node->children);
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node = inode->index(mibp, *depthp, (size_t)index);
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if (node == NULL) {
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ret = ENOENT;
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goto label_return;
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}
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if (nodesp != NULL)
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nodesp[i] = node;
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nodesp[i] = (const ctl_node_t *)node;
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mibp[i] = (size_t)index;
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}
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@ -696,6 +722,7 @@ ctl_byname(const char *name, void *oldp, size_t *oldlenp, void *newp,
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size_t depth;
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ctl_node_t const *nodes[CTL_MAX_DEPTH];
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size_t mib[CTL_MAX_DEPTH];
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const ctl_named_node_t *node;
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if (ctl_initialized == false && ctl_init()) {
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ret = EAGAIN;
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@ -707,13 +734,14 @@ ctl_byname(const char *name, void *oldp, size_t *oldlenp, void *newp,
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if (ret != 0)
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goto label_return;
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if (nodes[depth-1]->ctl == NULL) {
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node = ctl_named_node(nodes[depth-1]);
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if (node != NULL && node->ctl)
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ret = node->ctl(mib, depth, oldp, oldlenp, newp, newlen);
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else {
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/* The name refers to a partial path through the ctl tree. */
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ret = ENOENT;
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goto label_return;
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}
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ret = nodes[depth-1]->ctl(mib, depth, oldp, oldlenp, newp, newlen);
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label_return:
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return(ret);
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}
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@ -738,7 +766,7 @@ ctl_bymib(const size_t *mib, size_t miblen, void *oldp, size_t *oldlenp,
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void *newp, size_t newlen)
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{
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int ret;
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const ctl_node_t *node;
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const ctl_named_node_t *node;
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size_t i;
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if (ctl_initialized == false && ctl_init()) {
|
||||
@ -749,19 +777,21 @@ ctl_bymib(const size_t *mib, size_t miblen, void *oldp, size_t *oldlenp,
|
||||
/* Iterate down the tree. */
|
||||
node = super_root_node;
|
||||
for (i = 0; i < miblen; i++) {
|
||||
if (node->u.named.children[0].named) {
|
||||
assert(node);
|
||||
assert(node->nchildren > 0);
|
||||
if (ctl_named_node(node->children) != NULL) {
|
||||
/* Children are named. */
|
||||
if (node->u.named.nchildren <= mib[i]) {
|
||||
if (node->nchildren <= mib[i]) {
|
||||
ret = ENOENT;
|
||||
goto label_return;
|
||||
}
|
||||
node = &node->u.named.children[mib[i]];
|
||||
node = ctl_named_children(node, mib[i]);
|
||||
} else {
|
||||
const ctl_node_t *inode;
|
||||
const ctl_indexed_node_t *inode;
|
||||
|
||||
/* Indexed element. */
|
||||
inode = &node->u.named.children[0];
|
||||
node = inode->u.indexed.index(mib, miblen, mib[i]);
|
||||
inode = ctl_indexed_node(node->children);
|
||||
node = inode->index(mib, miblen, mib[i]);
|
||||
if (node == NULL) {
|
||||
ret = ENOENT;
|
||||
goto label_return;
|
||||
@ -770,12 +800,12 @@ ctl_bymib(const size_t *mib, size_t miblen, void *oldp, size_t *oldlenp,
|
||||
}
|
||||
|
||||
/* Call the ctl function. */
|
||||
if (node->ctl == NULL) {
|
||||
if (node && node->ctl)
|
||||
ret = node->ctl(mib, miblen, oldp, oldlenp, newp, newlen);
|
||||
else {
|
||||
/* Partial MIB. */
|
||||
ret = ENOENT;
|
||||
goto label_return;
|
||||
}
|
||||
ret = node->ctl(mib, miblen, oldp, oldlenp, newp, newlen);
|
||||
|
||||
label_return:
|
||||
return(ret);
|
||||
@ -1133,7 +1163,7 @@ CTL_RO_NL_CGEN(config_prof, opt_prof_accum, opt_prof_accum, bool)
|
||||
CTL_RO_NL_GEN(arenas_bin_i_size, arena_bin_info[mib[2]].reg_size, size_t)
|
||||
CTL_RO_NL_GEN(arenas_bin_i_nregs, arena_bin_info[mib[2]].nregs, uint32_t)
|
||||
CTL_RO_NL_GEN(arenas_bin_i_run_size, arena_bin_info[mib[2]].run_size, size_t)
|
||||
const ctl_node_t *
|
||||
const ctl_named_node_t *
|
||||
arenas_bin_i_index(const size_t *mib, size_t miblen, size_t i)
|
||||
{
|
||||
|
||||
@ -1143,7 +1173,7 @@ arenas_bin_i_index(const size_t *mib, size_t miblen, size_t i)
|
||||
}
|
||||
|
||||
CTL_RO_NL_GEN(arenas_lrun_i_size, ((mib[2]+1) << LG_PAGE), size_t)
|
||||
const ctl_node_t *
|
||||
const ctl_named_node_t *
|
||||
arenas_lrun_i_index(const size_t *mib, size_t miblen, size_t i)
|
||||
{
|
||||
|
||||
@ -1326,7 +1356,7 @@ CTL_RO_CGEN(config_stats, stats_arenas_i_bins_j_nreruns,
|
||||
CTL_RO_CGEN(config_stats, stats_arenas_i_bins_j_curruns,
|
||||
ctl_stats.arenas[mib[2]].bstats[mib[4]].curruns, size_t)
|
||||
|
||||
const ctl_node_t *
|
||||
const ctl_named_node_t *
|
||||
stats_arenas_i_bins_j_index(const size_t *mib, size_t miblen, size_t j)
|
||||
{
|
||||
|
||||
@ -1344,7 +1374,7 @@ CTL_RO_CGEN(config_stats, stats_arenas_i_lruns_j_nrequests,
|
||||
CTL_RO_CGEN(config_stats, stats_arenas_i_lruns_j_curruns,
|
||||
ctl_stats.arenas[mib[2]].lstats[mib[4]].curruns, size_t)
|
||||
|
||||
const ctl_node_t *
|
||||
const ctl_named_node_t *
|
||||
stats_arenas_i_lruns_j_index(const size_t *mib, size_t miblen, size_t j)
|
||||
{
|
||||
|
||||
@ -1365,10 +1395,10 @@ CTL_RO_CGEN(config_stats, stats_arenas_i_nmadvise,
|
||||
CTL_RO_CGEN(config_stats, stats_arenas_i_purged,
|
||||
ctl_stats.arenas[mib[2]].astats.purged, uint64_t)
|
||||
|
||||
const ctl_node_t *
|
||||
const ctl_named_node_t *
|
||||
stats_arenas_i_index(const size_t *mib, size_t miblen, size_t i)
|
||||
{
|
||||
const ctl_node_t * ret;
|
||||
const ctl_named_node_t * ret;
|
||||
|
||||
malloc_mutex_lock(&ctl_mtx);
|
||||
if (ctl_stats.arenas[i].initialized == false) {
|
||||
|
||||
Loading…
Reference in New Issue
Block a user