diff options
Diffstat (limited to 'erts/lib_src/common/ethr_aux.c')
| -rw-r--r-- | erts/lib_src/common/ethr_aux.c | 115 |
1 files changed, 95 insertions, 20 deletions
diff --git a/erts/lib_src/common/ethr_aux.c b/erts/lib_src/common/ethr_aux.c index 0cbb1b2fb8..7b156fe01a 100644 --- a/erts/lib_src/common/ethr_aux.c +++ b/erts/lib_src/common/ethr_aux.c @@ -1,7 +1,7 @@ /* * %CopyrightBegin% * - * Copyright Ericsson AB 2010-2014. All Rights Reserved. + * Copyright Ericsson AB 2010-2017. All Rights Reserved. * * Licensed under the Apache License, Version 2.0 (the "License"); * you may not use this file except in compliance with the License. @@ -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); @@ -139,6 +141,38 @@ x86_init(void) #endif /* bit 26 of edx is set if we have sse2 */ ethr_runtime__.conf.have_sse2 = (edx & (1 << 26)); + + /* check if we have extended feature set */ + eax = 0x80000000; + ethr_x86_cpuid__(&eax, &ebx, &ecx, &edx); + + if (eax < 0x80000001) + return; + + if (eax >= 0x80000007) { + /* Advanced Power Management Information */ + eax = 0x80000007; + ethr_x86_cpuid__(&eax, &ebx, &ecx, &edx); + + /* I got the values below from: + http://lxr.free-electrons.com/source/arch/x86/include/asm/cpufeature.h + They can be gotten from the intel/amd manual as well. + */ + + ethr_runtime__.conf.have_constant_tsc = (edx & (1 << 8)); + ethr_runtime__.conf.have_tsc_reliable = (edx & (1 << 23)); + ethr_runtime__.conf.have_nonstop_tsc = (edx & (1 << 24)); + ethr_runtime__.conf.have_nonstop_tsc_s3 = (edx & (1 << 30)); + + } + + /* Extended Processor Info and Feature Bits */ + eax = 0x80000001; + ethr_x86_cpuid__(&eax, &ebx, &ecx, &edx); + + /* bit 27 of edx is set if we have rdtscp */ + ethr_runtime__.conf.have_rdtscp = (edx & (1 << 27)); + } #endif /* ETHR_X86_RUNTIME_CONF__ */ @@ -188,7 +222,7 @@ ethr_init_common__(ethr_init_data *id) ethr_min_stack_size__ += ethr_pagesize__; #endif /* The system may think that we need more stack */ -#if defined(PTHREAD_STACK_MIN) +#if defined(ETHR_HAVE_USABLE_PTHREAD_STACK_MIN) if (ethr_min_stack_size__ < PTHREAD_STACK_MIN) ethr_min_stack_size__ = PTHREAD_STACK_MIN; #elif defined(_SC_THREAD_STACK_MIN) @@ -205,24 +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__); - -#ifdef __OSE__ - /* For supervisor processes, OSE adds a number of bytes to the requested stack. With this - * addition, the resulting size must not exceed the largest available stack size. The number - * of bytes that will be added is configured in the monolith and can therefore not be - * specified here. We simply assume that it is less than 0x1000. The available stack sizes - * are configured in the .lmconf file and the largest one is usually 65536 bytes. - * Consequently, the requested stack size is limited to 0xF000. - */ - ethr_max_stack_size__ = 0xF000; -#else ethr_max_stack_size__ = 32*1024*1024; -#endif #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) @@ -232,6 +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; @@ -292,6 +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)) { @@ -664,10 +743,6 @@ ETHR_IMPL_NORETURN__ ethr_fatal_error__(const char *file, int ethr_assert_failed(const char *file, int line, const char *func, char *a) { fprintf(stderr, "%s:%d: %s(): Assertion failed: %s\n", file, line, func, a); -#ifdef __OSE__ - ramlog_printf("%d: %s:%d: %s(): Assertion failed: %s\n", - current_process(),file, line, func, a); -#endif ethr_abort__(); return 0; } |