Bug #1189 ยป reproduce_bug.patch
| userspace-rcu-0.10.2/doc/examples/rculfhash/cds_lfht_destroy.c 2019-07-12 15:11:38.270598030 +0800 | ||
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#include <stdio.h>
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#include <stdlib.h>
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#include <time.h>
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#include <unistd.h>
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#include <urcu.h> /* RCU flavor */
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#include <urcu/rculfhash.h> /* RCU Lock-free hash table */
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#include <urcu/compiler.h> /* For CAA_ARRAY_SIZE */
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| ... | ... | |
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int main(int argc, char **argv)
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{
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int values[] = { -5, 42, 42, 36, 24, }; /* 42 is duplicated */
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int values[512]; /* 42 is duplicated */
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struct cds_lfht *ht; /* Hash table */
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unsigned int i;
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unsigned int i,j;
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int ret = 0;
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uint32_t seed;
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struct cds_lfht_iter iter; /* For iteration on hash table */
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| ... | ... | |
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* Each thread need using RCU read-side need to be explicitly
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* registered.
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*/
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for (i = 0; i< 512;i++) {
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values[i] = i;
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}
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rcu_register_thread();
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for (j =0;j < 200000; j++) {
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/* Use time as seed for hash table hashing. */
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seed = (uint32_t) time(NULL);
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| ... | ... | |
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rcu_read_lock();
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cds_lfht_add(ht, hash, &node->node);
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rcu_read_unlock();
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//usleep(500);
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}
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/*
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* random order, depending on the hash seed. Iteration needs to
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* be performed within RCU read-side critical section.
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*/
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printf("hash table content (random order):");
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//printf("hash table content (random order):");
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rcu_read_lock();
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cds_lfht_for_each_entry(ht, &iter, node, node) {
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printf(" %d", node->value);
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//printf(" %d", node->value);
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}
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rcu_read_unlock();
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printf("\n");
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//printf("\n");
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/*
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* Make sure all hash table nodes are removed before destroying.
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*/
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printf("removing all nodes:");
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//printf("removing all nodes:");
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rcu_read_lock();
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cds_lfht_for_each_entry(ht, &iter, node, node) {
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ht_node = cds_lfht_iter_get_node(&iter);
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ret = cds_lfht_del(ht, ht_node);
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printf(" %d", node->value);
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//printf(" %d", node->value);
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if (ret) {
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printf(" (concurrently deleted)");
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} else {
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call_rcu(&node->rcu_head, free_node);
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}
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//usleep(500);
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}
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rcu_read_unlock();
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printf("\n");
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//printf("current time: %d\n",j);
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/*
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* cds_lfht_destroy() must be called from a very specific
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* context: it needs to be called from a registered RCU reader
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| ... | ... | |
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if (ret) {
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printf("Destroying hash table failed\n");
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}
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if (j%5000 == 0) {
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printf("repeat %d times\n",j);
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}
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}
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end:
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if (j != 99999) {
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printf("only repeat %d times\n",j);
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}
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rcu_unregister_thread();
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return ret;
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}
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| userspace-rcu-0.10.2/doc/examples/rculfhash/Makefile.cds_lfht_destroy 2019-07-04 10:33:38.860003818 +0800 | ||
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DEPS = jhash.h
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OBJECTS = $(EXAMPLE_NAME).o
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BINARY = $(EXAMPLE_NAME)
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LIBS = -lurcu-cds -lurcu
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#LIBS = -lurcu-cds -lurcu
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LIBS = -L /usr/lib64/
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LIBS += -lurcu-cds -lurcu-signal
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CFLAGS += -D RCU_SIGNAL
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include ../Makefile.examples.template
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