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4a958c8444
At runtime, whenever a realloc, malloc, calloc, or new call fails to find enough memory, record the calling function and size requested. Does not print anything or call any heavyweight functions on this, as it is legal to return NULL to an alloc-type call. If the main application handles this NULL properly, there should be no panic and nothing different will happen. If the main application panics() at any later point in time, this record will be printed out as part of the crash log for processing with an updated EspExceptionDecoder.java. This adds 2-3 instructions overhead in the normal case, and around 10-12 instructions in the failing case, and requires an additional 8 bytes of .BSS to function. Only a single address is kept, the final failing malloc-type function call before a panic, but it is trivial to extend to a fifo with little overhead in the common, non-failing case.
134 lines
2.7 KiB
C++
134 lines
2.7 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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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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void operator delete(void * ptr)
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{
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free(ptr);
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}
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void operator delete[](void * ptr)
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{
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free(ptr);
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}
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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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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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namespace std
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{
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void __throw_bad_function_call()
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{
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panic();
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}
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void __throw_length_error(char const*)
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{
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panic();
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}
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void __throw_bad_alloc()
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{
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panic();
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}
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void __throw_logic_error(const char* str)
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{
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(void) str;
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panic();
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}
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void __throw_out_of_range(const char* str)
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{
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(void) str;
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panic();
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}
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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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