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dso: dynamically allocate destructor table

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This saves static memory on mono targets where it's scarce.
This commit is contained in:
Lephenixnoir 2023-01-01 19:23:08 +01:00
parent 1da9d10226
commit 465655674b
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GPG key ID: 1BBA026E13FC0495
1 changed files with 9 additions and 3 deletions
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12
src/dso.c
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@ -1,4 +1,4 @@
#include <stddef.h> #include <stdlib.h>
/* We don't support shared object loading, so provide a single handle */ /* We don't support shared object loading, so provide a single handle */
__attribute__((visibility("hidden"))) __attribute__((visibility("hidden")))
@ -13,12 +13,18 @@ struct dtor {
void *d; void *d;
}; };
static struct dtor _dtors[ATEXIT_MAX]; static struct dtor *_dtors;
static int _dtor_count = 0; static int _dtor_count = 0;
__attribute__((constructor))
static void alloc_dtors(void)
{
_dtors = malloc(ATEXIT_MAX * sizeof *_dtors);
}
int __cxa_atexit(void (*f)(void *), void *p, void *d) int __cxa_atexit(void (*f)(void *), void *p, void *d)
{ {
if(_dtor_count >= ATEXIT_MAX) if(!_dtors || _dtor_count >= ATEXIT_MAX)
return 1; return 1;
_dtors[_dtor_count++] = (struct dtor){ f, p, d }; _dtors[_dtor_count++] = (struct dtor){ f, p, d };
return 0; return 0;