static void
event_thread_init(void *drcontext)
{
per_thread_t *data = dr_thread_alloc(drcontext, sizeof(per_thread_t));
DR_ASSERT(data != NULL);
drmgr_set_tls_field(drcontext, tls_idx, data);
/* Keep seg_base in a per-thread data structure so we can get the TLS
* slot and find where the pointer points to in the buffer.
*/
data->seg_base = dr_get_dr_segment_base(tls_seg);
data->buf_base =
dr_raw_mem_alloc(MEM_BUF_SIZE, DR_MEMPROT_READ | DR_MEMPROT_WRITE, NULL);
DR_ASSERT(data->seg_base != NULL && data->buf_base != NULL);
/* put buf_base to TLS as starting buf_ptr */
BUF_PTR(data->seg_base) = data->buf_base;
data->num_refs = 0;
/* We're going to dump our data to a per-thread file.
* On Windows we need an absolute path so we place it in
* the same directory as our library. We could also pass
* in a path as a client argument.
*/
data->log =
log_file_open(client_id, drcontext, NULL /* using client lib path */, "memtrace",
#ifndef WINDOWS
DR_FILE_CLOSE_ON_FORK |
#endif
DR_FILE_ALLOW_LARGE);
data->logf = log_stream_from_file(data->log);
fprintf(data->logf, "Format: <data address>: <data size>, <(r)ead/(w)rite/opcode>\n");
}
static void
event_thread_init(void *drcontext)
{
per_thread_t *data = dr_thread_alloc(drcontext, sizeof(*data));
DR_ASSERT(data != NULL);
dr_set_tls_field(drcontext, data);
/* Keep seg_base in a per-thread data structure so we can get the TLS
* slot and find where the pointer points to in the buffer.
* It is mainly for users using a debugger to get the execution history.
*/
data->seg_base = dr_get_dr_segment_base(tls_seg);
/* We allocate a 128KB buffer to make sure we have a 64KB buffer with
* 64KB-aligned starting address, so that we can fill the buffer
* cyclically by incrementing the bottom 16 bits of the pointer.
*/
data->buf_base = dr_raw_mem_alloc(TLS_BUF_SIZE,
DR_MEMPROT_READ | DR_MEMPROT_WRITE,
NULL);
DR_ASSERT(data->seg_base != NULL && data->buf_base != NULL);
memset(data->buf_base, 0, TLS_BUF_SIZE);
/* put the 64KB-aligned address into TLS slot as the pointer pointing
* to the 64KB cyclic buffer
*/
*(void **)((byte *)(data->seg_base) + tls_offs) = (void *)
ALIGN_FORWARD(data->buf_base, BUF_64K_BYTE);
}
