static void
pb_debug_buffer_fill(struct pb_debug_buffer *buf)
{
uint8_t *map;
map = pb_map(buf->buffer, PIPE_BUFFER_USAGE_CPU_WRITE);
assert(map);
if(map) {
fill_random_pattern(map, buf->underflow_size);
fill_random_pattern(map + buf->underflow_size + buf->base.base.size,
buf->overflow_size);
pb_unmap(buf->buffer);
}
}
/**
* Check for under/over flows.
*
* Should be called with the buffer unmaped.
*/
static void
pb_debug_buffer_check(struct pb_debug_buffer *buf)
{
uint8_t *map;
map = pb_map(buf->buffer,
PB_USAGE_CPU_READ |
PB_USAGE_UNSYNCHRONIZED, NULL);
assert(map);
if (map) {
boolean underflow, overflow;
pb_size min_ofs, max_ofs;
underflow = !check_random_pattern(map, buf->underflow_size,
&min_ofs, &max_ofs);
if(underflow) {
debug_printf("buffer underflow (offset -%"PRIu64"%s to -%"PRIu64" bytes) detected\n",
buf->underflow_size - min_ofs,
min_ofs == 0 ? "+" : "",
buf->underflow_size - max_ofs);
}
overflow = !check_random_pattern(map + buf->underflow_size + buf->base.size,
buf->overflow_size,
&min_ofs, &max_ofs);
if(overflow) {
debug_printf("buffer overflow (size %"PRIu64" plus offset %"PRIu64" to %"PRIu64"%s bytes) detected\n",
buf->base.size,
min_ofs,
max_ofs,
max_ofs == buf->overflow_size - 1 ? "+" : "");
}
if(underflow || overflow)
debug_backtrace_dump(buf->create_backtrace, PB_DEBUG_CREATE_BACKTRACE);
debug_assert(!underflow);
debug_assert(!overflow);
/* re-fill if not aborted */
if(underflow)
fill_random_pattern(map, buf->underflow_size);
if(overflow)
fill_random_pattern(map + buf->underflow_size + buf->base.size,
buf->overflow_size);
pb_unmap(buf->buffer);
}
}
/**
* Check for under/over flows.
*
* Should be called with the buffer unmaped.
*/
static void
pb_debug_buffer_check(struct pb_debug_buffer *buf)
{
uint8_t *map;
map = pb_map(buf->buffer, PIPE_BUFFER_USAGE_CPU_READ);
assert(map);
if(map) {
boolean underflow, overflow;
size_t min_ofs, max_ofs;
underflow = !check_random_pattern(map, buf->underflow_size,
&min_ofs, &max_ofs);
if(underflow) {
debug_printf("buffer underflow (offset -%u%s to -%u bytes) detected\n",
buf->underflow_size - min_ofs,
min_ofs == 0 ? "+" : "",
buf->underflow_size - max_ofs);
}
overflow = !check_random_pattern(map + buf->underflow_size + buf->base.base.size,
buf->overflow_size,
&min_ofs, &max_ofs);
if(overflow) {
debug_printf("buffer overflow (size %u plus offset %u to %u%s bytes) detected\n",
buf->base.base.size,
min_ofs,
max_ofs,
max_ofs == buf->overflow_size - 1 ? "+" : "");
}
debug_assert(!underflow && !overflow);
/* re-fill if not aborted */
if(underflow)
fill_random_pattern(map, buf->underflow_size);
if(overflow)
fill_random_pattern(map + buf->underflow_size + buf->base.base.size,
buf->overflow_size);
pb_unmap(buf->buffer);
}
}
