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82a1382864
Default mode (no exceptions) will no longer use the stdc++ library new allocator when there is not enough memory. Instead, it will return nullptr. This is the pre-exceptions-available behavior (2.5.0 and earlier). When exceptions are enabled, use the real new and throw exceptions that can be caught at higher levels, or which will crash the app with an uncaught exception if they're not handled. Update to #6309
96 lines
2.4 KiB
C++
96 lines
2.4 KiB
C++
/*
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Copyright (c) 2014 Arduino. All right reserved.
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This library is free software; you can redistribute it and/or
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modify it under the terms of the GNU Lesser General Public
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License as published by the Free Software Foundation; either
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version 2.1 of the License, or (at your option) any later version.
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This library is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
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See the GNU Lesser General Public License for more details.
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You should have received a copy of the GNU Lesser General Public
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License along with this library; if not, write to the Free Software
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Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
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*/
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#include <stdlib.h>
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#include <assert.h>
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#include <debug.h>
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#include <Arduino.h>
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#include <cxxabi.h>
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using __cxxabiv1::__guard;
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// Debugging helper, last allocation which returned NULL
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extern void *umm_last_fail_alloc_addr;
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extern int umm_last_fail_alloc_size;
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extern "C" void __cxa_pure_virtual(void) __attribute__ ((__noreturn__));
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extern "C" void __cxa_deleted_virtual(void) __attribute__ ((__noreturn__));
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#ifndef __cpp_exceptions
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void *operator new(size_t size)
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{
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void *ret = malloc(size);
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if (0 != size && 0 == ret) {
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umm_last_fail_alloc_addr = __builtin_return_address(0);
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umm_last_fail_alloc_size = size;
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}
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return ret;
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}
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void *operator new[](size_t size)
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{
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void *ret = malloc(size);
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if (0 != size && 0 == ret) {
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umm_last_fail_alloc_addr = __builtin_return_address(0);
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umm_last_fail_alloc_size = size;
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}
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return ret;
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}
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#endif
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void __cxa_pure_virtual(void)
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{
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panic();
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}
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void __cxa_deleted_virtual(void)
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{
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panic();
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}
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typedef struct {
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uint8_t guard;
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uint8_t ps;
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} guard_t;
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extern "C" int __cxa_guard_acquire(__guard* pg)
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{
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uint8_t ps = xt_rsil(15);
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if (reinterpret_cast<guard_t*>(pg)->guard) {
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xt_wsr_ps(ps);
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return 0;
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}
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reinterpret_cast<guard_t*>(pg)->ps = ps;
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return 1;
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}
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extern "C" void __cxa_guard_release(__guard* pg)
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{
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reinterpret_cast<guard_t*>(pg)->guard = 1;
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xt_wsr_ps(reinterpret_cast<guard_t*>(pg)->ps);
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}
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extern "C" void __cxa_guard_abort(__guard* pg)
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{
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xt_wsr_ps(reinterpret_cast<guard_t*>(pg)->ps);
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}
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// TODO: rebuild windows toolchain to make this unnecessary:
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void* __dso_handle;
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