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initial working guarded pages

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daanx 2024-08-19 21:21:40 -07:00
parent 7b5df14bea
commit 0c19eb60cf
12 changed files with 196 additions and 37 deletions
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28
src/options.c
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@ -99,8 +99,8 @@ static mi_option_desc_t options[_mi_option_last] =
#else
{ 0, UNINIT, MI_OPTION(visit_abandoned) },
#endif
{ 0, UNINIT, MI_OPTION(debug_guarded_min) }, // only when build with MI_DEBUG_GUARDED: minimal rounded object size for guarded objects (=0)
{ 0, UNINIT, MI_OPTION(debug_guarded_max) }, // only when build with MI_DEBUG_GUARDED: maximal rounded object size for guarded objects (=0)
{ 0, UNINIT, MI_OPTION(debug_guarded_min) }, // only used when built with MI_DEBUG_GUARDED: minimal rounded object size for guarded objects (=0)
{ 0, UNINIT, MI_OPTION(debug_guarded_max) }, // only used when built with MI_DEBUG_GUARDED: maximal rounded object size for guarded objects (=0)
};
static void mi_option_init(mi_option_desc_t* desc);
@ -110,8 +110,7 @@ static bool mi_option_has_size_in_kib(mi_option_t option) {
}
void _mi_options_init(void) {
// called on process load; should not be called before the CRT is initialized!
// (e.g. do not call this from process_init as that may run before CRT initialization)
// called on process load
mi_add_stderr_output(); // now it safe to use stderr for output
for(int i = 0; i < _mi_option_last; i++ ) {
mi_option_t option = (mi_option_t)i;
@ -124,6 +123,14 @@ void _mi_options_init(void) {
}
mi_max_error_count = mi_option_get(mi_option_max_errors);
mi_max_warning_count = mi_option_get(mi_option_max_warnings);
#if MI_DEBUG_GUARDED
if (mi_option_get(mi_option_debug_guarded_max) > 0) {
if (mi_option_is_enabled(mi_option_allow_large_os_pages)) {
mi_option_disable(mi_option_allow_large_os_pages);
_mi_warning_message("option 'allow_large_os_pages' is disabled to allow for guarded objects\n");
}
}
#endif
}
long _mi_option_get_fast(mi_option_t option) {
@ -168,6 +175,13 @@ void mi_option_set(mi_option_t option, long value) {
mi_assert(desc->option == option); // index should match the option
desc->value = value;
desc->init = INITIALIZED;
// ensure min/max range; be careful to not recurse.
if (desc->option == mi_option_debug_guarded_min && _mi_option_get_fast(mi_option_debug_guarded_max) < value) {
mi_option_set(mi_option_debug_guarded_max, value);
}
else if (desc->option == mi_option_debug_guarded_max && _mi_option_get_fast(mi_option_debug_guarded_min) > value) {
mi_option_set(mi_option_debug_guarded_min, value);
}
}
void mi_option_set_default(mi_option_t option, long value) {
@ -517,11 +531,7 @@ static void mi_option_init(mi_option_desc_t* desc) {
value = (size > LONG_MAX ? LONG_MAX : (long)size);
}
if (*end == 0) {
desc->value = value;
desc->init = INITIALIZED;
if (desc->option == mi_option_debug_guarded_min && _mi_option_get_fast(mi_option_debug_guarded_max) < value) {
mi_option_set(mi_option_debug_guarded_max,value);
}
mi_option_set(desc->option, value);
}
else {
// set `init` first to avoid recursion through _mi_warning_message on mimalloc_verbose.