#include <kperf/kdebug_trigger.h>
#include <kperf/kperf.h>
#include <kperf/kperf_kpc.h>
-#include <kperf/kperf_timer.h>
+#include <kperf/kptimer.h>
#include <kperf/pet.h>
#include <kperf/sample.h>
#include <kperf/thread_samplers.h>
(uintptr_t)VM_PAGE_COMPRESSOR_COUNT);
}
+static void
+kperf_sample_user_internal(struct kperf_usample *sbuf,
+ struct kperf_context *context, unsigned int actionid,
+ unsigned int sample_what)
+{
+ if (sample_what & SAMPLER_USTACK) {
+ kperf_ucallstack_sample(&sbuf->ucallstack, context);
+ }
+ if (sample_what & SAMPLER_TH_DISPATCH) {
+ kperf_thread_dispatch_sample(&sbuf->th_dispatch, context);
+ }
+ if (sample_what & SAMPLER_TH_INFO) {
+ kperf_thread_info_sample(&sbuf->th_info, context);
+ }
+
+ boolean_t intren = ml_set_interrupts_enabled(FALSE);
+
+ /*
+ * No userdata or sample_flags for this one.
+ */
+ BUF_DATA(PERF_GEN_EVENT | DBG_FUNC_START, sample_what, actionid);
+
+ if (sample_what & SAMPLER_USTACK) {
+ kperf_ucallstack_log(&sbuf->ucallstack);
+ }
+ if (sample_what & SAMPLER_TH_DISPATCH) {
+ kperf_thread_dispatch_log(&sbuf->th_dispatch);
+ }
+ if (sample_what & SAMPLER_TH_INFO) {
+ kperf_thread_info_log(&sbuf->th_info);
+ }
+
+ BUF_DATA(PERF_GEN_EVENT | DBG_FUNC_END, sample_what);
+
+ ml_set_interrupts_enabled(intren);
+}
+
+void
+kperf_sample_user(struct kperf_usample *sbuf, struct kperf_context *context,
+ unsigned int actionid, unsigned int sample_flags)
+{
+ if (actionid == 0 || actionid > actionc) {
+ return;
+ }
+
+ unsigned int sample_what = actionv[actionid - 1].sample;
+ unsigned int ucallstack_depth = actionv[actionid - 1].ucallstack_depth;
+
+ /* callstacks should be explicitly ignored */
+ if (sample_flags & SAMPLE_FLAG_EMPTY_CALLSTACK) {
+ sample_what &= ~(SAMPLER_KSTACK | SAMPLER_USTACK);
+ }
+ if (sample_flags & SAMPLE_FLAG_ONLY_SYSTEM) {
+ sample_what &= SAMPLER_SYS_MEM;
+ }
+ assert((sample_flags & (SAMPLE_FLAG_THREAD_ONLY | SAMPLE_FLAG_TASK_ONLY))
+ != (SAMPLE_FLAG_THREAD_ONLY | SAMPLE_FLAG_TASK_ONLY));
+ if (sample_flags & SAMPLE_FLAG_THREAD_ONLY) {
+ sample_what &= SAMPLER_THREAD_MASK;
+ }
+ if (sample_flags & SAMPLE_FLAG_TASK_ONLY) {
+ sample_what &= SAMPLER_TASK_MASK;
+ }
+
+ if (sample_what == 0) {
+ return;
+ }
+
+ sbuf->ucallstack.kpuc_nframes = ucallstack_depth ?:
+ MAX_UCALLSTACK_FRAMES;
+
+ kperf_sample_user_internal(sbuf, context, actionid, sample_what);
+}
+
static kern_return_t
kperf_sample_internal(struct kperf_sample *sbuf,
struct kperf_context *context,
uint32_t userdata = actionid;
bool task_only = false;
- /* not much point continuing here, but what to do ? return
- * Shutdown? cut a tracepoint and continue?
- */
if (sample_what == 0) {
return SAMPLE_CONTINUE;
}
}
if (!task_only) {
- context->cur_thread->kperf_pet_gen = kperf_pet_gen;
+ context->cur_thread->kperf_pet_gen =
+ os_atomic_load(&kppet_gencount, relaxed);
}
bool is_kernel = (context->cur_pid == 0);
sbuf->kcallstack.kpkc_nframes = MAX_KCALLSTACK_FRAMES;
}
- if (ucallstack_depth) {
- sbuf->ucallstack.kpuc_nframes = ucallstack_depth;
- } else {
- sbuf->ucallstack.kpuc_nframes = MAX_UCALLSTACK_FRAMES;
- }
-
+ ucallstack_depth = ucallstack_depth ?: MAX_UCALLSTACK_FRAMES;
sbuf->kcallstack.kpkc_flags = 0;
- sbuf->ucallstack.kpuc_flags = 0;
+ sbuf->usample.ucallstack.kpuc_flags = 0;
if (sample_what & SAMPLER_TH_INFO) {
kperf_thread_info_sample(&sbuf->th_info, context);
if (sample_what & SAMPLER_KSTACK) {
if (sample_flags & SAMPLE_FLAG_CONTINUATION) {
kperf_continuation_sample(&(sbuf->kcallstack), context);
- /* outside of interrupt context, backtrace the current thread */
} else if (sample_flags & SAMPLE_FLAG_NON_INTERRUPT) {
+ /* outside of interrupt context, backtrace the current thread */
kperf_backtrace_sample(&(sbuf->kcallstack), context);
} else {
kperf_kcallstack_sample(&(sbuf->kcallstack), context);
kperf_task_snapshot_sample(context->cur_task, &(sbuf->tk_snapshot));
}
- /* sensitive ones */
if (!is_kernel) {
if (sample_what & SAMPLER_MEMINFO) {
kperf_meminfo_sample(context->cur_task, &(sbuf->meminfo));
if (sample_flags & SAMPLE_FLAG_PEND_USER) {
if (sample_what & SAMPLER_USTACK) {
- pended_ucallstack = kperf_ucallstack_pend(context, sbuf->ucallstack.kpuc_nframes);
+ pended_ucallstack = kperf_ucallstack_pend(context,
+ ucallstack_depth, actionid);
}
if (sample_what & SAMPLER_TH_DISPATCH) {
- pended_th_dispatch = kperf_thread_dispatch_pend(context);
- }
- } else {
- if (sample_what & SAMPLER_USTACK) {
- kperf_ucallstack_sample(&(sbuf->ucallstack), context);
- }
-
- if (sample_what & SAMPLER_TH_DISPATCH) {
- kperf_thread_dispatch_sample(&(sbuf->th_dispatch), context);
+ pended_th_dispatch =
+ kperf_thread_dispatch_pend(context, actionid);
}
}
}
if (pended_th_dispatch) {
BUF_INFO(PERF_TI_DISPPEND);
}
- } else {
- if (sample_what & SAMPLER_USTACK) {
- kperf_ucallstack_log(&(sbuf->ucallstack));
- }
-
- if (sample_what & SAMPLER_TH_DISPATCH) {
- kperf_thread_dispatch_log(&(sbuf->th_dispatch));
- }
}
}
/* the samplers to run */
unsigned int sample_what = actionv[actionid - 1].sample;
+ unsigned int ucallstack_depth = actionv[actionid - 1].ucallstack_depth;
/* do the actual sample operation */
return kperf_sample_internal(sbuf, context, sample_what,
- sample_flags, actionid,
- actionv[actionid - 1].ucallstack_depth);
+ sample_flags, actionid, ucallstack_depth);
}
void
void
kperf_thread_ast_handler(thread_t thread)
{
- BUF_INFO(PERF_AST_HNDLR | DBG_FUNC_START, thread, kperf_get_thread_flags(thread));
+ uint32_t ast = thread->kperf_ast;
+
+ BUF_INFO(PERF_AST_HNDLR | DBG_FUNC_START, thread, ast);
- /* ~2KB of the stack for the sample since this is called from AST */
- struct kperf_sample sbuf;
- memset(&sbuf, 0, sizeof(struct kperf_sample));
+ struct kperf_usample sbuf = {};
task_t task = get_threadtask(thread);
return;
}
- /* make a context, take a sample */
struct kperf_context ctx = {
.cur_thread = thread,
.cur_task = task,
.cur_pid = task_pid(task),
};
- /* decode the flags to determine what to sample */
unsigned int sample_what = 0;
- uint32_t flags = kperf_get_thread_flags(thread);
-
- if (flags & T_KPERF_AST_DISPATCH) {
+ if (ast & T_KPERF_AST_DISPATCH) {
sample_what |= SAMPLER_TH_DISPATCH;
}
- if (flags & T_KPERF_AST_CALLSTACK) {
- sample_what |= SAMPLER_USTACK;
- sample_what |= SAMPLER_TH_INFO;
+ if (ast & T_KPERF_AST_CALLSTACK) {
+ /* TH_INFO for backwards compatibility */
+ sample_what |= SAMPLER_USTACK | SAMPLER_TH_INFO;
}
- uint32_t ucallstack_depth = T_KPERF_GET_CALLSTACK_DEPTH(flags);
-
- int r = kperf_sample_internal(&sbuf, &ctx, sample_what, 0, 0, ucallstack_depth);
+ sbuf.ucallstack.kpuc_nframes =
+ T_KPERF_GET_CALLSTACK_DEPTH(ast) ?: MAX_UCALLSTACK_FRAMES;
+ unsigned int actionid = T_KPERF_GET_ACTIONID(ast);
+ kperf_sample_user_internal(&sbuf, &ctx, actionid, sample_what);
- BUF_INFO(PERF_AST_HNDLR | DBG_FUNC_END, r);
+ BUF_INFO(PERF_AST_HNDLR | DBG_FUNC_END);
}
-/* register AST bits */
int
-kperf_ast_pend(thread_t thread, uint32_t set_flags)
+kperf_ast_pend(thread_t thread, uint32_t set_flags, unsigned int set_actionid)
{
- /* can only pend on the current thread */
if (thread != current_thread()) {
- panic("pending to non-current thread");
+ panic("kperf: pending AST to non-current thread");
}
- /* get our current bits */
- uint32_t flags = kperf_get_thread_flags(thread);
+ uint32_t ast = thread->kperf_ast;
+ unsigned int actionid = T_KPERF_GET_ACTIONID(ast);
+ uint32_t flags = ast & T_KPERF_AST_ALL;
+
+ if ((flags | set_flags) != flags || actionid != set_actionid) {
+ ast &= ~T_KPERF_SET_ACTIONID(actionid);
+ ast |= T_KPERF_SET_ACTIONID(set_actionid);
+ ast |= set_flags;
- /* see if it's already been done or pended */
- if (!(flags & set_flags)) {
- /* set the bit on the thread */
- flags |= set_flags;
- kperf_set_thread_flags(thread, flags);
+ thread->kperf_ast = ast;
/* set the actual AST */
act_set_kperf(thread);
void
kperf_ast_set_callstack_depth(thread_t thread, uint32_t depth)
{
- uint32_t ast_flags = kperf_get_thread_flags(thread);
- uint32_t existing_callstack_depth =
- T_KPERF_GET_CALLSTACK_DEPTH(ast_flags);
-
- if (existing_callstack_depth < depth) {
- ast_flags &= ~T_KPERF_SET_CALLSTACK_DEPTH(depth);
- ast_flags |= T_KPERF_SET_CALLSTACK_DEPTH(depth);
- kperf_set_thread_flags(thread, ast_flags);
+ uint32_t ast = thread->kperf_ast;
+ uint32_t existing_depth = T_KPERF_GET_CALLSTACK_DEPTH(ast);
+ if (existing_depth < depth) {
+ ast &= ~T_KPERF_SET_CALLSTACK_DEPTH(existing_depth);
+ ast |= T_KPERF_SET_CALLSTACK_DEPTH(depth);
+ thread->kperf_ast = ast;
}
}
* more things, too.
*/
if (actionc == 0) {
- int r;
- if ((r = kperf_init())) {
- return r;
- }
+ kperf_setup();
}
/* create a new array */
if (depth > MAX_UCALLSTACK_FRAMES) {
return EINVAL;
}
+ if (depth < 2) {
+ return EINVAL;
+ }
actionv[action_id - 1].ucallstack_depth = depth;
if (depth > MAX_KCALLSTACK_FRAMES) {
return EINVAL;
}
+ if (depth < 1) {
+ return EINVAL;
+ }
actionv[action_id - 1].kcallstack_depth = depth;
projects / apple / xnu.git / blobdiff