trace_codename = function(codename, callback)
local debugid = trace.debugid(codename)
if debugid ~= 0 then
trace.single(debugid,callback)
else
printf("WARNING: Cannot locate debugid for '%s'\n", codename)
end
end
initial_timestamp = 0
workqueue_ptr_map = {};
get_prefix = function(buf)
if initial_timestamp == 0 then
initial_timestamp = buf.timestamp
end
local secs = trace.convert_timestamp_to_nanoseconds(buf.timestamp - initial_timestamp) / 1000000000
local prefix
if trace.debugid_is_start(buf.debugid) then
prefix = "→"
elseif trace.debugid_is_end(buf.debugid) then
prefix = "←"
else
prefix = "↔"
end
local proc
if buf.command ~= "kernel_task" then
proc = buf.command
workqueue_ptr_map[buf[1]] = buf.command
elseif workqueue_ptr_map[buf[1]] ~= nil then
proc = workqueue_ptr_map[buf[1]]
else
proc = "UNKNOWN"
end
return string.format("%s %6.9f %-17s [%05d.%06x] %-24s",
prefix, secs, proc, buf.pid, buf.threadid, buf.debugname)
end
trace_codename("pthread_thread_create", function(buf)
local prefix = get_prefix(buf)
if trace.debugid_is_start(buf.debugid) then
printf("%s\tthread creation request: 0x%x\n", prefix, buf[1])
elseif trace.debugid_is_end(buf.debugid) then
printf("%s\t thread creation complete: pthread 0x%x (error: %d)\n", prefix, buf[2], buf[1])
elseif buf[4] == 2 then
printf("%s\t thread stack created: 0x%x + 0x%x\n", prefix, buf[2], buf[1])
elseif buf[4] == 3 then
printf("%s\t thread using custom stack")
end
end)
trace_codename("pthread_thread_terminate", function(buf)
local prefix = get_prefix(buf)
if trace.debugid_is_start(buf.debugid) then
printf("%s\tthread terminate: stack 0x%x + 0x%x, kthport 0x%x\n", prefix, buf[1], buf[2], buf[3])
elseif trace.debugid_is_end(buf.debugid) then
printf("%s\t thread terminate: ret %d\n", prefix, buf[1])
end
end)
darwin.sysctlbyname("kern.pthread_debug_tracing", 1)
completion_handler = function()
darwin.sysctlbyname("kern.pthread_debug_tracing", 0)
end
trace.set_completion_handler(completion_handler)