--- /dev/null
+#include "intel_rdt.c" /* sic */
+#include "testing.h"
+#include <sys/stat.h>
+
+/***************************************************************************
+ * PQOS mocks
+ */
+#if PQOS_VERSION >= 30000
+int pqos_alloc_reset(const enum pqos_cdp_config l3_cdp_cfg,
+ const enum pqos_cdp_config l2_cdp_cfg,
+ const enum pqos_mba_config mba_cfg) {
+ return 0;
+}
+#elif PQOS_VERSION >= 2000
+int pqos_alloc_reset(const enum pqos_cdp_config l3_cdp_cfg,
+ const enum pqos_cdp_config l2_cdp_cfg) {
+ return 0;
+}
+#else
+int pqos_alloc_reset(const enum pqos_cdp_config l3_cdp_cfg) {
+ return 0;
+}
+#endif
+
+#ifdef LIBPQOS2
+/***************************************************************************
+ * PQOS v2.0 mocks
+ */
+int pqos_mon_reset(void) { return 0; }
+int pqos_mon_assoc_get(const unsigned lcore, pqos_rmid_t *rmid) { return 0; }
+int pqos_mon_start(const unsigned num_cores, const unsigned *cores,
+ const enum pqos_mon_event event, void *context,
+ struct pqos_mon_data *group) {
+ return 0;
+}
+int pqos_mon_start_pids(const unsigned num_pids, const pid_t *pids,
+ const enum pqos_mon_event event, void *context,
+ struct pqos_mon_data *group) {
+ return 0;
+}
+int pqos_mon_add_pids(const unsigned num_pids, const pid_t *pids,
+ struct pqos_mon_data *group) {
+ return 0;
+}
+int pqos_mon_remove_pids(const unsigned num_pids, const pid_t *pids,
+ struct pqos_mon_data *group) {
+ return 0;
+}
+int pqos_mon_stop(struct pqos_mon_data *group) { return 0; }
+int pqos_mon_poll(struct pqos_mon_data **groups, const unsigned num_groups) {
+ return 0;
+}
+int pqos_alloc_assoc_set(const unsigned lcore, const unsigned class_id) {
+ return 0;
+}
+int pqos_alloc_assoc_get(const unsigned lcore, unsigned *class_id) { return 0; }
+int pqos_alloc_assoc_set_pid(const pid_t task, const unsigned class_id) {
+ return 0;
+}
+int pqos_alloc_assoc_get_pid(const pid_t task, unsigned *class_id) { return 0; }
+int pqos_alloc_assign(const unsigned technology, const unsigned *core_array,
+ const unsigned core_num, unsigned *class_id) {
+ return 0;
+}
+int pqos_alloc_release(const unsigned *core_array, const unsigned core_num) {
+ return 0;
+}
+int pqos_alloc_assign_pid(const unsigned technology, const pid_t *task_array,
+ const unsigned task_num, unsigned *class_id) {
+ return 0;
+}
+int pqos_alloc_release_pid(const pid_t *task_array, const unsigned task_num) {
+ return 0;
+}
+int pqos_init(const struct pqos_config *config) { return 0; }
+int pqos_fini(void) { return 0; }
+int pqos_cap_get_type(const struct pqos_cap *cap, const enum pqos_cap_type type,
+ const struct pqos_capability **cap_item) {
+ return 0;
+}
+int pqos_cap_get(const struct pqos_cap **cap, const struct pqos_cpuinfo **cpu) {
+ return 0;
+}
+#else
+/***************************************************************************
+ * PQOS v1.2 mocks
+ */
+int pqos_mon_reset(void) { return 0; }
+int pqos_mon_assoc_get(const unsigned lcore, pqos_rmid_t *rmid) { return 0; }
+int pqos_mon_start(const unsigned num_cores, const unsigned *cores,
+ const enum pqos_mon_event event, void *context,
+ struct pqos_mon_data *group) {
+ return 0;
+}
+int pqos_mon_start_pid(const pid_t pids, const enum pqos_mon_event event,
+ void *context, struct pqos_mon_data *group) {
+ return 0;
+}
+int pqos_mon_stop(struct pqos_mon_data *group) { return 0; }
+int pqos_mon_poll(struct pqos_mon_data **groups, const unsigned num_groups) {
+ return 0;
+}
+int pqos_alloc_assoc_set(const unsigned lcore, const unsigned class_id) {
+ return 0;
+}
+int pqos_alloc_assoc_get(const unsigned lcore, unsigned *class_id) { return 0; }
+int pqos_alloc_assoc_set_pid(const pid_t task, const unsigned class_id) {
+ return 0;
+}
+int pqos_alloc_assoc_get_pid(const pid_t task, unsigned *class_id) { return 0; }
+int pqos_alloc_assign(const unsigned technology, const unsigned *core_array,
+ const unsigned core_num, unsigned *class_id) {
+ return 0;
+}
+int pqos_alloc_release(const unsigned *core_array, const unsigned core_num) {
+ return 0;
+}
+int pqos_alloc_assign_pid(const unsigned technology, const pid_t *task_array,
+ const unsigned task_num, unsigned *class_id) {
+ return 0;
+}
+int pqos_alloc_release_pid(const pid_t *task_array, const unsigned task_num) {
+ return 0;
+}
+int pqos_init(const struct pqos_config *config) { return 0; }
+int pqos_fini(void) { return 0; }
+int pqos_cap_get_type(const struct pqos_cap *cap, const enum pqos_cap_type type,
+ const struct pqos_capability **cap_item) {
+ return 0;
+}
+int pqos_cap_get(const struct pqos_cap **cap, const struct pqos_cpuinfo **cpu) {
+ return 0;
+}
+#endif /* LIBPQOS2 */
+
+/***************************************************************************
+ * helper functions
+ */
+
+/*
+ * NAME
+ * pids_list_get_element
+ *
+ * DESCRIPTION
+ * Gets list element at index position. Assumes list was created by
+ * pids_list_add_pid function.
+ *
+ * PARAMETERS
+ * `list' Pids list
+ * `index' Position of desired element relative to given list pointer.
+ *
+ * RETURN VALUE
+ * Pointer to element at index position.
+ * NULL if index exceeds list's length.
+ */
+pids_list_t *pids_list_get_element(pids_list_t *list, const size_t index) {
+ assert(list);
+ size_t current = 0;
+ while (list != NULL && current != index) {
+ list = list->next;
+ current++;
+ }
+ return list;
+}
+
+/*
+ * NAME
+ * pids_list_find_element
+ *
+ * DESCRIPTION
+ * Gets index of element in the list matching
+ * given pid. Assumes PIDs are unique, stops searching
+ * on the first match.
+ *
+ * PARAMETERS
+ * `list' Pids list
+ * `pid' PID number to find
+ *
+ * RETURN VALUE
+ * Index of list element holding given PID.
+ */
+int pids_list_find_element(pids_list_t *list, const pid_t pid) {
+ assert(list);
+ int result = -1;
+ size_t current = 0;
+ while (list != NULL) {
+ if (list->pid == pid) {
+ result = current;
+ break;
+ }
+ list = list->next;
+ }
+ return result;
+}
+
+/*
+ * NAME
+ * pids_list_has_element
+ *
+ * DESCRIPTION
+ * Checks if the list contains given pid.
+ * Wrapper for pids_list_find_element function.
+ * Used to make tests easier to read.
+ *
+ * PARAMETERS
+ * `list' Pids list
+ * `pid' PID number to find
+ *
+ * RETURN VALUE
+ * 1 if list contains given PID
+ * 0 if list does not contain given PID
+ */
+int pids_list_has_element(pids_list_t *list, const pid_t pid) {
+ return pids_list_find_element(list, pid) >= 0 ? 1 : 0;
+}
+
+/*
+ * NAME
+ * pids_list_free_all
+ *
+ * DESCRIPTION
+ * Frees memory allocated in the given list
+ *
+ * PARAMETERS
+ * `list' Pids list
+ */
+void pids_list_free_all(pids_list_t *list) {
+ while (list) {
+ pids_list_t *previous = list;
+ list = list->next;
+ free(previous);
+ }
+}
+
+typedef struct stub_proc_pid {
+ proc_comm_t comm;
+ pid_t pid;
+} stub_proc_pid_t;
+
+static const char *proc_fs = "/tmp/procfs_stub";
+
+/*
+ * NAME
+ * stub_procfs_setup
+ *
+ * DESCRIPTION
+ * Prepares testing environment by creating temporary
+ * PID/comm file structure.
+ *
+ * PARAMETERS
+ * `proc_pids_array' Array of stub_proc_pid_t structs. Represents
+ * which PIDs should hold given process name.
+ * `proc_pids_array_length' Element count of input array.
+ *
+ * RETURN VALUE
+ * 0 on success.
+ * -1 on base dir creation error.
+ * -2 on comm file creation error.
+ */
+int stub_procfs_setup(const stub_proc_pid_t *proc_pids_array,
+ const size_t proc_pids_array_length) {
+ if (mkdir(proc_fs, S_IRWXU | S_IRWXG | S_IROTH | S_IXOTH) != 0) {
+ return -1;
+ }
+ char path[256];
+
+ for (size_t i = 0; i < proc_pids_array_length; ++i) {
+ memset(path, 0, sizeof(path));
+ snprintf(path, STATIC_ARRAY_SIZE(path), "%s/%d", proc_fs,
+ proc_pids_array[i].pid);
+ mkdir(path, S_IRWXU | S_IRWXG | S_IROTH | S_IXOTH);
+ strncat(path, "/comm", STATIC_ARRAY_SIZE(path) - strlen(path) - 1);
+
+ FILE *fp = fopen(path, "w");
+ if (!fp) {
+ return -2;
+ }
+ fwrite(proc_pids_array[i].comm, sizeof(char),
+ strlen(proc_pids_array[i].comm), fp);
+ fclose(fp);
+ }
+ return 0;
+}
+
+/*
+ * NAME
+ * stub_procfs_teardown
+ *
+ * DESCRIPTION
+ * Clears testing environment: removes stub proc files.
+ * NOTE - This function could be implemented by usage of nftw, but this
+ * would require #define _XOPEN_SOURCE 500, which
+ * messes up intel_rdt includes.
+ *
+ * RETURN VALUE
+ * system command result
+ */
+int stub_procfs_teardown() {
+ char cmd[256];
+ sstrncpy(cmd, "rm -rf ", STATIC_ARRAY_SIZE(cmd));
+ strncat(cmd, proc_fs, STATIC_ARRAY_SIZE(cmd) - strlen(cmd) - 1);
+ return system(cmd);
+}
+
+/* Max PID value. More info:
+ * http://web.archive.org/web/20111209081734/http://research.cs.wisc.edu/condor/condorg/linux_scalability.html
+ */
+#define MAX_PID 4194304
+#define MAX_PID_STR "4194304"
+
+/***************************************************************************
+ * tests
+ */
+DEF_TEST(add_proc_pid_empty_list) {
+ /* setup */
+ proc_pids_t proc_pids_instance;
+ proc_pids_instance.pids = NULL;
+ pid_t pid = 1234;
+
+ /* check */
+ pids_list_add_pid(&proc_pids_instance.pids, pid);
+ pids_list_t *added = pids_list_get_element(proc_pids_instance.pids, 0);
+ EXPECT_EQ_INT(pid, added->pid);
+
+ /* cleanup */
+ pids_list_free_all(proc_pids_instance.pids);
+ return 0;
+}
+
+DEF_TEST(add_proc_pid_non_empty_list) {
+ /* setup */
+ proc_pids_t proc_pids_instance;
+ proc_pids_instance.pids = NULL;
+ pid_t pids[] = {1000, 1001, 1002, 1003, 1004, 1005, 1006, 1007};
+
+ /* check */
+ for (size_t i = 0; i < STATIC_ARRAY_SIZE(pids); ++i) {
+ pids_list_add_pid(&proc_pids_instance.pids, pids[i]);
+ }
+
+ for (size_t i = 0; i < STATIC_ARRAY_SIZE(pids); ++i) {
+ pids_list_t *added = pids_list_get_element(proc_pids_instance.pids, i);
+ EXPECT_EQ_INT(pids[i], added->pid);
+ }
+
+ /* cleanup */
+ pids_list_free_all(proc_pids_instance.pids);
+ return 0;
+}
+
+DEF_TEST(get_pid_number_valid_dir) {
+ /* setup */
+ struct dirent d;
+ sstrncpy(d.d_name, MAX_PID_STR, STATIC_ARRAY_SIZE(d.d_name));
+ d.d_type = DT_DIR;
+ pid_t pid = 0;
+
+ /* check */
+ int pid_conversion = get_pid_number(&d, &pid);
+
+ EXPECT_EQ_INT(0, pid_conversion);
+ EXPECT_EQ_INT(MAX_PID, pid);
+
+ /* cleanup */
+ return 0;
+}
+
+DEF_TEST(get_pid_number_invalid_dir_name) {
+ /* setup */
+ struct dirent d;
+ sstrncpy(d.d_name, "invalid", STATIC_ARRAY_SIZE(d.d_name));
+ d.d_type = DT_DIR;
+ pid_t pid = 0;
+
+ /* check */
+ int pid_conversion = get_pid_number(&d, &pid);
+
+ EXPECT_EQ_INT(-2, pid_conversion);
+ EXPECT_EQ_INT(0, pid);
+
+ /* cleanup */
+ return 0;
+}
+
+DEF_TEST(read_proc_name_valid_name) {
+ /* setup */
+ stub_proc_pid_t pp_stubs[] = {{"proc1", MAX_PID}};
+ stub_procfs_setup(pp_stubs, STATIC_ARRAY_SIZE(pp_stubs));
+ struct dirent d;
+ sstrncpy(d.d_name, MAX_PID_STR, STATIC_ARRAY_SIZE(d.d_name));
+ d.d_type = DT_DIR;
+
+ /* check */
+ proc_comm_t comm;
+ int read_result = read_proc_name(proc_fs, &d, comm, STATIC_ARRAY_SIZE(comm));
+
+ EXPECT_EQ_INT(strlen(pp_stubs[0].comm), read_result);
+ EXPECT_EQ_STR(pp_stubs[0].comm, comm);
+
+ /* cleanup */
+ stub_procfs_teardown();
+ return 0;
+}
+
+DEF_TEST(read_proc_name_invalid_name) {
+ /* setup */
+ struct dirent d;
+ sstrncpy(d.d_name, MAX_PID_STR, STATIC_ARRAY_SIZE(d.d_name));
+ d.d_type = DT_DIR;
+
+ /* check */
+ proc_comm_t comm;
+ int read_result = read_proc_name(proc_fs, &d, comm, STATIC_ARRAY_SIZE(comm));
+
+ EXPECT_EQ_INT(-1, read_result);
+
+ /* cleanup */
+ return 0;
+}
+
+DEF_TEST(fetch_pids_for_procs_one_proc_many_pid) {
+ /* setup */
+ const char *proc_names[] = {"proc1"};
+ stub_proc_pid_t pp_stubs[] = {{"proc1", 1007},
+ {"proc1", 1008},
+ {"proc1", 1009},
+ {"proc2", 1010},
+ {"proc3", 1011}};
+ stub_procfs_setup(pp_stubs, STATIC_ARRAY_SIZE(pp_stubs));
+ proc_pids_t *output = NULL;
+
+ /* check */
+ int result = fetch_pids_for_procs(proc_fs, proc_names,
+ STATIC_ARRAY_SIZE(proc_names), &output);
+ EXPECT_EQ_INT(0, result);
+
+ /* proc name check */
+ EXPECT_EQ_STR(proc_names[0], output[0].proccess_name);
+
+ for (size_t i = 0; i < STATIC_ARRAY_SIZE(pp_stubs); ++i) {
+ if (0 == strcmp(pp_stubs[i].comm, proc_names[0])) {
+ /* check if proc struct has correct pids */
+ EXPECT_EQ_INT(pids_list_has_element(output[0].pids, pp_stubs[i].pid), 1);
+ } else {
+ /* check if proc struct has no incorrect pids */
+ EXPECT_EQ_INT(pids_list_has_element(output[0].pids, pp_stubs[i].pid), 0);
+ }
+ }
+
+ /* cleanup */
+ for (size_t i = 0; i < STATIC_ARRAY_SIZE(proc_names); ++i) {
+ pids_list_free_all(output[i].pids);
+ }
+ free(output);
+ stub_procfs_teardown();
+ return 0;
+}
+
+DEF_TEST(fetch_pids_for_procs_many_proc_many_pid) {
+ /* setup */
+ const char *proc_names[] = {"proc1", "proc2", "proc3"};
+ stub_proc_pid_t pp_stubs[] = {
+ {"proc1", 1007}, {"proc1", 1008}, {"proc1", 1009}, {"proc2", 2007},
+ {"proc2", 2008}, {"proc2", 2009}, {"proc3", 3007}, {"proc3", 3008},
+ {"proc3", 3009}, {"proc4", 4007}, {"proc4", 4008}, {"proc4", 4009},
+ {"proc5", 5007}, {"proc5", 5008}, {"proc5", 5009}};
+ stub_procfs_setup(pp_stubs, STATIC_ARRAY_SIZE(pp_stubs));
+ proc_pids_t *output = NULL;
+
+ /* check */
+ int result = fetch_pids_for_procs(proc_fs, proc_names,
+ STATIC_ARRAY_SIZE(proc_names), &output);
+ EXPECT_EQ_INT(0, result);
+
+ for (size_t i = 0; i < STATIC_ARRAY_SIZE(proc_names); ++i) {
+
+ /* proc name check */
+ EXPECT_EQ_STR(proc_names[i], output[i].proccess_name);
+
+ for (size_t j = 0; j < STATIC_ARRAY_SIZE(pp_stubs); ++j) {
+ if (0 == strcmp(pp_stubs[j].comm, proc_names[i])) {
+ /* check if proc struct has correct pids */
+ EXPECT_EQ_INT(pids_list_has_element(output[i].pids, pp_stubs[j].pid),
+ 1);
+ } else {
+ /* check if proc struct has no incorrect pids */
+ EXPECT_EQ_INT(pids_list_has_element(output[i].pids, pp_stubs[j].pid),
+ 0);
+ }
+ }
+ }
+
+ /* cleanup */
+ for (size_t i = 0; i < STATIC_ARRAY_SIZE(proc_names); ++i) {
+ pids_list_free_all(output[i].pids);
+ }
+ free(output);
+ stub_procfs_teardown();
+ return 0;
+}
+
+int main(void) {
+ stub_procfs_teardown();
+ RUN_TEST(add_proc_pid_empty_list);
+ RUN_TEST(add_proc_pid_non_empty_list);
+ RUN_TEST(get_pid_number_valid_dir);
+ RUN_TEST(get_pid_number_invalid_dir_name);
+ RUN_TEST(read_proc_name_valid_name);
+ RUN_TEST(read_proc_name_invalid_name);
+ RUN_TEST(fetch_pids_for_procs_one_proc_many_pid);
+ RUN_TEST(fetch_pids_for_procs_many_proc_many_pid);
+ stub_procfs_teardown();
+ END_TEST;
+}
projects / collectd.git / blobdiff