unwind.c

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// SPDX-License-Identifier: LGPL-3.0-only
 
#include "backtrace/backtrace.h"
#include <stdio.h>
 
#define UNW_LOCAL_ONLY
#include <unwind.h>
 
static unw_context_t gContext;
 
void bt_init(void)
{
    unw_getcontext(&gContext);
}
 
void bt_update(void)
{
 
}
 
STA_DECL
const char *bt_backend(void)
{
    return "libunwind";
}
 
void bt_read_inner(bt_trace_t callback, void *user)
{
    unw_cursor_t cursor;
    unw_word_t ip, sp;
 
    unw_init_local(&cursor, &gContext);
 
    while (unw_step(&cursor) > 0)
    {
        unw_get_reg(&cursor, UNW_REG_IP, &ip);
        unw_get_reg(&cursor, UNW_REG_SP, &sp);
 
        bt_address_t frame = ip;
 
        callback(frame, &frame);
    }
}
 
bt_resolve_t bt_resolve_inner(bt_address_t frame, bt_symbol_t *symbol)
{
    text_t name = symbol->name;
    (void)snprintf(name.text, name.length, "0x%" PRIxPTR, frame);
 
    return eResolveNothing;
}