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AP_Common: wrap _malloc_r on cygwin

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fixes dual allocation heap bug
See https://cygwin.com/pipermail/cygwin/2000-July/038916.html
This commit is contained in:
Andrew Tridgell 2024-07-06 15:50:43 +10:00
parent 9c8175994e
commit db19bce1d2
1 changed files with 28 additions and 1 deletions
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29
libraries/AP_Common/c++.cpp
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@ -84,8 +84,35 @@ void operator delete[](void * ptr)
if (ptr) free(ptr);
}
#ifdef CYGWIN_BUILD
/*
wrapper around malloc to ensure all memory is initialised as zero
cygwin needs to wrap _malloc_r
*/
#undef _malloc_r
extern "C" {
void *__wrap__malloc_r(_reent *r, size_t size);
void *__real__malloc_r(_reent *r, size_t size);
void *_malloc_r(_reent *r, size_t size);
}
void *__wrap__malloc_r(_reent *r, size_t size)
{
void *ret = __real__malloc_r(r, size);
if (ret != nullptr) {
memset(ret, 0, size);
}
return ret;
}
void *_malloc_r(_reent *x, size_t size)
{
void *ret = __real__malloc_r(x, size);
if (ret != nullptr) {
memset(ret, 0, size);
}
return ret;
}
#if CONFIG_HAL_BOARD != HAL_BOARD_CHIBIOS
#elif CONFIG_HAL_BOARD != HAL_BOARD_CHIBIOS
/*
wrapper around malloc to ensure all memory is initialised as zero
ChibiOS has its own wrapper