diff options
Diffstat (limited to 'erts/lib_src/common')
| -rw-r--r-- | erts/lib_src/common/erl_misc_utils.c | 17 | ||||
| -rw-r--r-- | erts/lib_src/common/ethr_aux.c | 64 |
2 files changed, 75 insertions, 6 deletions
diff --git a/erts/lib_src/common/erl_misc_utils.c b/erts/lib_src/common/erl_misc_utils.c index 8186463b9c..2ffb23bf54 100644 --- a/erts/lib_src/common/erl_misc_utils.c +++ b/erts/lib_src/common/erl_misc_utils.c @@ -842,7 +842,7 @@ read_topology(erts_cpu_info_t *cpuinfo) cpuinfo->topology[ix].logical = -1; } - ix = -1; + ix = 0; if (realpath(ERTS_SYS_NODE_PATH, npath)) { ndir = opendir(npath); @@ -886,6 +886,7 @@ read_topology(erts_cpu_info_t *cpuinfo) cdir = NULL; break; } + if (sscanf(cde->d_name, "cpu%d", &cpu_id) == 1) { char buf[50]; /* Much more than enough for an integer */ int processor_id, core_id; @@ -906,23 +907,33 @@ read_topology(erts_cpu_info_t *cpuinfo) if (sscanf(buf, "%d", &core_id) != 1) continue; + /* + * The number of CPUs that proc fs presents is greater + * then the number of CPUs configured in sysconf. + * This has been known to happen in docker. When this + * happens we refuse to give a CPU topology. + */ + if (ix >= cpuinfo->configured) + goto error; + /* * We now know node id, processor id, and * core id of the logical processor with * the cpu id 'cpu_id'. */ - ix++; cpuinfo->topology[ix].node = node_id; cpuinfo->topology[ix].processor = processor_id; cpuinfo->topology[ix].processor_node = -1; /* Fixed later */ cpuinfo->topology[ix].core = core_id; cpuinfo->topology[ix].thread = 0; /* we'll numerate later */ cpuinfo->topology[ix].logical = cpu_id; + ix++; + } } } while (got_nodes); - res = ix+1; + res = ix; if (!res || res < cpuinfo->online) res = 0; diff --git a/erts/lib_src/common/ethr_aux.c b/erts/lib_src/common/ethr_aux.c index 3501fe335a..bbffca4d6d 100644 --- a/erts/lib_src/common/ethr_aux.c +++ b/erts/lib_src/common/ethr_aux.c @@ -68,6 +68,8 @@ size_t ethr_max_stack_size__; /* kilo words */ ethr_rwmutex xhndl_rwmtx; ethr_xhndl_list *xhndl_list; +static ethr_tsd_key ethr_stacklimit_key__; + static int main_threads; static int init_ts_event_alloc(void); @@ -237,13 +239,11 @@ ethr_init_common__(ethr_init_data *id) #endif ethr_min_stack_size__ = ETHR_PAGE_ALIGN(ethr_min_stack_size__); - ethr_min_stack_size__ = ETHR_B2KW(ethr_min_stack_size__); - ethr_max_stack_size__ = 32*1024*1024; #if SIZEOF_VOID_P == 8 ethr_max_stack_size__ *= 2; #endif - ethr_max_stack_size__ = ETHR_B2KW(ethr_max_stack_size__); + ethr_max_stack_size__ = ETHR_PAGE_ALIGN(ethr_max_stack_size__); res = ethr_init_atomics(); if (res != 0) @@ -253,6 +253,10 @@ ethr_init_common__(ethr_init_data *id) if (res != 0) return res; + res = ethr_tsd_key_create(ðr_stacklimit_key__, "stacklimit"); + if (res != 0) + return res; + xhndl_list = NULL; return 0; @@ -313,6 +317,60 @@ ethr_late_init_common__(ethr_late_init_data *lid) return 0; } +/* + * Stack limit + */ + +void *ethr_get_stacklimit(void) +{ + return ethr_tsd_get(ethr_stacklimit_key__); +} + +int ethr_set_stacklimit(void *limit) +{ + void *prev = ethr_tsd_get(ethr_stacklimit_key__); + if (prev) + return EACCES; + if (!limit) + return EINVAL; + return ethr_tsd_set(ethr_stacklimit_key__, limit); +} + +/* internal stacklimit (thread creation) */ + +void +ethr_set_stacklimit__(char *prev_c, size_t stacksize) +{ + /* + * We *don't* want this function inlined, i.e., it is + * risky to call this function from another function + * in ethr_aux.c + */ + void *limit = NULL; + char c; + int res; + + if (stacksize) { + char *start; + if (&c > prev_c) { + start = (char *) ((((ethr_uint_t) prev_c) + / ethr_pagesize__) + * ethr_pagesize__); + limit = start + stacksize; + } + else { + start = (char *) (((((ethr_uint_t) prev_c) - 1) + / ethr_pagesize__ + 1) + * ethr_pagesize__); + limit = start - stacksize; + } + } + + res = ethr_tsd_set(ethr_stacklimit_key__, limit); + if (res != 0) + ethr_abort__(); +} + int ethr_install_exit_handler(void (*funcp)(void)) { |