A set of minimal dependency bootstrap binaries
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stage0/dynamic_execution_trace.c

101 lines
2.0 KiB

/* Copyright (C) 2016 Jeremiah Orians
* This file is part of stage0.
*
* stage0 is free software: you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation, either version 3 of the License, or
* (at your option) any later version.
*
* stage0 is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with stage0. If not, see <http://www.gnu.org/licenses/>.
*/
#include <stdio.h>
#include <stdlib.h>
#include <stdint.h>
#include <stdbool.h>
#include <string.h>
/* Unique instruction type */
struct instruction_trace
{
uint64_t count;
char name[255];
struct instruction_trace* next;
struct instruction_trace* prev;
};
static struct instruction_trace* traces;
struct instruction_trace* create_trace(char* c)
{
struct instruction_trace* p;
p = calloc(1, sizeof(struct instruction_trace));
strncpy(p->name, c, 255);
p->count = 1;
return p;
}
struct instruction_trace* add_trace(struct instruction_trace* head, struct instruction_trace* p)
{
if(NULL == head)
{
return p;
}
if(NULL == head->next)
{
head->next = p;
p->prev = head;
}
else
{
add_trace(head->next, p);
}
return head;
}
bool update_trace(struct instruction_trace* p, char* c)
{
if(0 == strncmp(p->name, c, 255))
{
p->count = p->count + 1;
return true;
}
if(NULL != p->next)
{
return update_trace(p->next, c);
}
return false;
}
void record_trace(char* c)
{
if((NULL != traces) && (update_trace(traces, c)))
{
return;
}
traces = add_trace(traces, create_trace(c));
}
struct instruction_trace* print_trace(struct instruction_trace* p)
{
printf("%s\t%u\n", p->name, (unsigned int)p->count);
return p->next;
}
void print_traces()
{
struct instruction_trace* i = traces;
while(NULL != i)
{
i = print_trace(i);
}
}