int breakpoint_enable(struct breakpoint *b) {
if (b == NULL) {
fprintf(stderr, "mvm: breakpoint not initialized!\n");
exit(1);
}
b->enabled = bp_enabled;
if (b->type == bp_address)
breakpoint_insert(b);
return 0;
}
static int handle_breakpoint(struct task *task)
{
struct breakpoint *bp = task->event.e_un.breakpoint;
unsigned int hw = bp->hw;
debug(DEBUG_EVENT, "+++ process pid=%d breakpoint addr=%#lx", task->pid, bp->addr);
assert(task->stopped);
if (unlikely(options.verbose > 1))
set_timer(&task->halt_time, hw ? &hw_bp_time : &sw_bp_time);
if (unlikely(options.verbose))
++bp->count;
if (unlikely(task->skip_bp)) {
struct breakpoint *skip_bp = task->skip_bp;
task->skip_bp = NULL;
breakpoint_put(skip_bp);
if (likely(skip_bp == bp)) {
skip_breakpoint(task, bp);
goto end;
}
if (unlikely(options.verbose))
fprintf(stderr, "!!!unhandled skip breakpoint for pid=%d\n", task->pid);
}
if (unlikely(bp->deleted)) {
continue_task(task, 0);
goto end;
}
#if HW_BREAKPOINTS > 1
if (bp->type >= BP_HW) {
if (unlikely(++bp->hwcnt >= (BP_REORDER_THRESHOLD << hw))) {
struct timespec start;
if (unlikely(options.verbose > 1))
start_time(&start);
reorder_hw_bp(task);
if (unlikely(options.verbose > 1))
set_timer(&start, &reorder_time);
}
}
#endif
if (bp->on_hit && bp->on_hit(task, bp)) {
continue_task(task, 0);
goto end;
}
if (likely(bp->libsym && !task->breakpoint)) {
struct library_symbol *libsym = bp->libsym;
save_param_context(task);
if (libsym->func->report_out || !options.nocpp) {
task->breakpoint = breakpoint_insert(task, get_return_addr(task), NULL, BP_HW_SCRATCH);
if (likely(task->breakpoint)) {
task->libsym = libsym;
task->breakpoint->on_hit = handle_call_after;
#if HW_BREAKPOINTS > 0
enable_scratch_hw_bp(task, task->breakpoint);
#endif
}
}
if (libsym->func->report_in) {
struct timespec start;
if (unlikely(options.verbose > 1))
start_time(&start);
libsym->func->report_in(task, libsym);
if (unlikely(options.verbose > 1))
set_timer(&start, &report_in_time);
}
}
if (task->bp_skipped)
task->bp_skipped = 0;
else
skip_breakpoint(task, bp);
end:
breakpoint_put(bp);
return 0;
}
