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value.h: add configuration macros around mrb_ro_data_p(); close #5547

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- `MRB_USE_ETEXT_RO_DATA_P`: use `etext` and `edata`
- `MRB_NO_DEFAULT_RO_DATA_P`: not use the default `mrb_ro_data_p()`
This commit is contained in:
Yukihiro "Matz" Matsumoto
2021-09-09 16:15:25 +09:00
parent 5dd8b04d91
commit 49602f636d
2 changed files with 15 additions and 2 deletions
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include/mrbconf.h
+10
View File
@@ -113,6 +113,16 @@
/* number of object per heap page */
//#define MRB_HEAP_PAGE_SIZE 1024
/* define if your platform does not support etext, edata */
//#define MRB_NO_DEFAULT_RO_DATA_P
/* define if your platform supports etext, edata */
//#define MRB_USE_RO_DATA_P_ETEXT
/* use MRB_USE_ETEXT_RO_DATA_P by default on Linux */
#if (defined(__linux__) && !defined(__KERNEL__))
#define MRB_USE_ETEXT_RO_DATA_P
#endif
/* you can provide and use mrb_ro_data_p() for your platform.
prototype is `mrb_bool mrb_ro_data_p(const char *ptr)` */
//#define MRB_USE_CUSTOM_RO_DATA_P
include/mruby/value.h
+5 -2
View File
@@ -411,7 +411,8 @@ mrb_undef_value(void)
#if defined(MRB_USE_CUSTOM_RO_DATA_P)
/* If you define `MRB_USE_CUSTOM_RO_DATA_P`, you must implement `mrb_ro_data_p()`. */
mrb_bool mrb_ro_data_p(const char *p);
#elif (defined(__linux__) && !defined(__KERNEL__))
#elif !defined(MRB_NO_DEFAULT_RO_DATA_P)
#if defined(MRB_USE_ETEXT_RO_DATA_P)
#define MRB_LINK_TIME_RO_DATA_P
extern char etext, edata;
static inline mrb_bool
@@ -427,7 +428,9 @@ mrb_ro_data_p(const char *p)
{
return (char*)get_etext() < p && p < (char*)get_edata();
}
#else
#endif /* Linux or macOS */
#endif /* MRB_NO_DEFAULT_RO_DATA_P */
#ifndef MRB_LINK_TIME_RO_DATA_P
# define mrb_ro_data_p(p) FALSE
#endif