* Copyright (c) 2011 Apple Computer, Inc. All rights reserved.
*
* @APPLE_OSREFERENCE_LICENSE_HEADER_START@
- *
+ *
* This file contains Original Code and/or Modifications of Original Code
* as defined in and that are subject to the Apple Public Source License
* Version 2.0 (the 'License'). You may not use this file except in
* unlawful or unlicensed copies of an Apple operating system, or to
* circumvent, violate, or enable the circumvention or violation of, any
* terms of an Apple operating system software license agreement.
- *
+ *
* Please obtain a copy of the License at
* http://www.opensource.apple.com/apsl/ and read it before using this file.
- *
+ *
* The Original Code and all software distributed under the License are
* distributed on an 'AS IS' basis, WITHOUT WARRANTY OF ANY KIND, EITHER
* EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES,
* FITNESS FOR A PARTICULAR PURPOSE, QUIET ENJOYMENT OR NON-INFRINGEMENT.
* Please see the License for the specific language governing rights and
* limitations under the License.
- *
+ *
* @APPLE_OSREFERENCE_LICENSE_HEADER_END@
*/
#include <mach/mach_types.h>
#include <machine/machine_routines.h>
-// #include <libkern/libkern.h>
#include <kern/kalloc.h>
#include <kern/debug.h> /* panic */
#include <kern/thread.h>
#include <sys/errno.h>
+#include <sys/vm.h>
+#include <vm/vm_object.h>
+#include <vm/vm_page.h>
+#include <vm/vm_pageout.h>
-#include <chud/chud_xnu.h>
-#include <kperf/kperf.h>
-
+#include <kperf/action.h>
+#include <kperf/ast.h>
#include <kperf/buffer.h>
-#include <kperf/timetrigger.h>
-#include <kperf/threadinfo.h>
#include <kperf/callstack.h>
-#include <kperf/sample.h>
-#include <kperf/action.h>
#include <kperf/context.h>
-#include <kperf/ast.h>
+#include <kperf/kdebug_trigger.h>
+#include <kperf/kperf.h>
#include <kperf/kperf_kpc.h>
+#include <kperf/kperf_timer.h>
+#include <kperf/pet.h>
+#include <kperf/sample.h>
+#include <kperf/thread_samplers.h>
-#define ACTION_MAX 32
+#define ACTION_MAX (32)
/* the list of different actions to take */
-struct action
-{
+struct action {
uint32_t sample;
+ uint32_t ucallstack_depth;
+ uint32_t kcallstack_depth;
uint32_t userdata;
int pid_filter;
};
/* the list of actions */
-static unsigned actionc = 0;
+static unsigned int actionc = 0;
static struct action *actionv = NULL;
-/* manage callbacks from system */
+/* should emit tracepoint on context switch */
+int kperf_kdebug_cswitch = 0;
+
+bool
+kperf_action_has_non_system(unsigned int actionid)
+{
+ if (actionid > actionc) {
+ return false;
+ }
-/* callback set for kdebug */
-static int kperf_kdbg_callback_set = 0;
-/* whether to record callstacks on kdebug events */
-static int kdebug_callstacks = 0;
-/* the action ID to trigger on signposts */
-static int kperf_signpost_action = 0;
+ if (actionv[actionid - 1].sample & ~SAMPLER_SYS_MEM) {
+ return true;
+ } else {
+ return false;
+ }
+}
-/* callback set for context-switch */
-int kperf_cswitch_callback_set = 0;
-/* should emit tracepoint on context switch */
-static int kdebug_cswitch = 0;
-/* the action ID to trigger on context switches */
-static int kperf_cswitch_action = 0;
+bool
+kperf_action_has_task(unsigned int actionid)
+{
+ if (actionid > actionc) {
+ return false;
+ }
+
+ return (actionv[actionid - 1].sample & SAMPLER_TASK_MASK);
+}
-/* indirect hooks to play nice with CHUD for the transition to kperf */
-kern_return_t chudxnu_kdebug_callback_enter(chudxnu_kdebug_callback_func_t fn);
-kern_return_t chudxnu_kdebug_callback_cancel(void);
+bool
+kperf_action_has_thread(unsigned int actionid)
+{
+ if (actionid > actionc) {
+ return false;
+ }
+
+ return (actionv[actionid - 1].sample & SAMPLER_THREAD_MASK);
+}
+
+static void
+kperf_system_memory_log(void)
+{
+ BUF_DATA(PERF_MI_SYS_DATA, (uintptr_t)vm_page_free_count,
+ (uintptr_t)vm_page_wire_count, (uintptr_t)vm_page_external_count,
+ (uintptr_t)(vm_page_active_count + vm_page_inactive_count +
+ vm_page_speculative_count));
+ BUF_DATA(PERF_MI_SYS_DATA_2, (uintptr_t)vm_page_anonymous_count,
+ (uintptr_t)vm_page_internal_count,
+ (uintptr_t)vm_pageout_vminfo.vm_pageout_compressions,
+ (uintptr_t)VM_PAGE_COMPRESSOR_COUNT);
+}
-/* Do the real work! */
-/* this can be called in any context ... right? */
static kern_return_t
kperf_sample_internal(struct kperf_sample *sbuf,
struct kperf_context *context,
unsigned sample_what, unsigned sample_flags,
- unsigned actionid)
+ unsigned actionid, uint32_t ucallstack_depth)
{
- boolean_t enabled;
- int did_ucallstack = 0, did_tinfo_extra = 0;
- uint32_t userdata;
+ int pended_ucallstack = 0;
+ int pended_th_dispatch = 0;
+ bool on_idle_thread = false;
+ uint32_t userdata = actionid;
+ bool task_only = false;
/* not much point continuing here, but what to do ? return
* Shutdown? cut a tracepoint and continue?
return SAMPLE_CONTINUE;
}
- int is_kernel = (context->cur_pid == 0);
+ /* 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) {
+ task_only = true;
+ sample_what &= SAMPLER_TASK_MASK;
+ }
+
+ if (!task_only) {
+ context->cur_thread->kperf_pet_gen = kperf_pet_gen;
+ }
+ bool is_kernel = (context->cur_pid == 0);
+
+ if (actionid && actionid <= actionc) {
+ sbuf->kcallstack.nframes = actionv[actionid - 1].kcallstack_depth;
+ } else {
+ sbuf->kcallstack.nframes = MAX_CALLSTACK_FRAMES;
+ }
+
+ if (ucallstack_depth) {
+ sbuf->ucallstack.nframes = ucallstack_depth;
+ } else {
+ sbuf->ucallstack.nframes = MAX_CALLSTACK_FRAMES;
+ }
- sbuf->kcallstack.nframes = 0;
sbuf->kcallstack.flags = CALLSTACK_VALID;
- sbuf->ucallstack.nframes = 0;
sbuf->ucallstack.flags = CALLSTACK_VALID;
/* an event occurred. Sample everything and dump it in a
*/
/* collect data from samplers */
- if (sample_what & SAMPLER_TINFO) {
- kperf_threadinfo_sample(&sbuf->threadinfo, context);
+ if (sample_what & SAMPLER_TH_INFO) {
+ kperf_thread_info_sample(&sbuf->th_info, context);
/* See if we should drop idle thread samples */
if (!(sample_flags & SAMPLE_FLAG_IDLE_THREADS)) {
- if (sbuf->threadinfo.runmode & 0x40) {
- return SAMPLE_CONTINUE;
+ if (sbuf->th_info.kpthi_runmode & 0x40) {
+ on_idle_thread = true;
+ goto log_sample;
}
}
}
- if ((sample_what & SAMPLER_KSTACK) && !(sample_flags & SAMPLE_FLAG_EMPTY_CALLSTACK)) {
- kperf_kcallstack_sample(&(sbuf->kcallstack), context);
+ if (sample_what & SAMPLER_TH_SNAPSHOT) {
+ kperf_thread_snapshot_sample(&(sbuf->th_snapshot), context);
+ }
+ if (sample_what & SAMPLER_TH_SCHEDULING) {
+ kperf_thread_scheduling_sample(&(sbuf->th_scheduling), 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) {
+ kperf_backtrace_sample(&(sbuf->kcallstack), context);
+ } else {
+ kperf_kcallstack_sample(&(sbuf->kcallstack), context);
+ }
+ }
+ if (sample_what & SAMPLER_TK_SNAPSHOT) {
+ kperf_task_snapshot_sample(context->cur_task, &(sbuf->tk_snapshot));
}
/* sensitive ones */
if (!is_kernel) {
if (sample_what & SAMPLER_MEMINFO) {
- kperf_meminfo_sample(&(sbuf->meminfo), context);
+ kperf_meminfo_sample(context->cur_task, &(sbuf->meminfo));
}
if (sample_flags & SAMPLE_FLAG_PEND_USER) {
- if ((sample_what & SAMPLER_USTACK)
- && !(sample_flags & SAMPLE_FLAG_EMPTY_CALLSTACK))
- {
- did_ucallstack = kperf_ucallstack_pend(context);
+ if (sample_what & SAMPLER_USTACK) {
+ pended_ucallstack = kperf_ucallstack_pend(context, sbuf->ucallstack.nframes);
}
- if (sample_what & SAMPLER_TINFOEX) {
- did_tinfo_extra = kperf_threadinfo_extra_pend(context);
+ if (sample_what & SAMPLER_TH_DISPATCH) {
+ pended_th_dispatch = kperf_thread_dispatch_pend(context);
}
} else {
- if ((sample_what & SAMPLER_USTACK)
- && !(sample_flags & SAMPLE_FLAG_EMPTY_CALLSTACK))
- {
+ if (sample_what & SAMPLER_USTACK) {
kperf_ucallstack_sample(&(sbuf->ucallstack), context);
}
- if (sample_what & SAMPLER_TINFOEX) {
- kperf_threadinfo_extra_sample(&(sbuf->tinfo_ex),
- context);
+ if (sample_what & SAMPLER_TH_DISPATCH) {
+ kperf_thread_dispatch_sample(&(sbuf->th_dispatch), context);
}
}
}
kperf_kpc_cpu_sample(&(sbuf->kpcdata), sample_what);
}
+log_sample:
/* lookup the user tag, if any */
if (actionid && (actionid <= actionc)) {
userdata = actionv[actionid - 1].userdata;
- } else {
- userdata = actionid;
+ }
+
+ /* avoid logging if this sample only pended samples */
+ if (sample_flags & SAMPLE_FLAG_PEND_USER &&
+ !(sample_what & ~(SAMPLER_USTACK | SAMPLER_TH_DISPATCH)))
+ {
+ return SAMPLE_CONTINUE;
}
/* stash the data into the buffer
* interrupts off to ensure we don't get split
*/
- enabled = ml_set_interrupts_enabled(FALSE);
+ boolean_t enabled = ml_set_interrupts_enabled(FALSE);
BUF_DATA(PERF_GEN_EVENT | DBG_FUNC_START, sample_what,
actionid, userdata, sample_flags);
- /* dump threadinfo */
- if (sample_what & SAMPLER_TINFO) {
- kperf_threadinfo_log( &sbuf->threadinfo );
+ if (sample_flags & SAMPLE_FLAG_SYSTEM) {
+ if (sample_what & SAMPLER_SYS_MEM) {
+ kperf_system_memory_log();
+ }
+ }
+ if (on_idle_thread) {
+ goto log_sample_end;
}
- /* dump kcallstack */
+ if (sample_what & SAMPLER_TH_INFO) {
+ kperf_thread_info_log(&sbuf->th_info);
+ }
+ if (sample_what & SAMPLER_TH_SCHEDULING) {
+ kperf_thread_scheduling_log(&(sbuf->th_scheduling));
+ }
+ if (sample_what & SAMPLER_TH_SNAPSHOT) {
+ kperf_thread_snapshot_log(&(sbuf->th_snapshot));
+ }
if (sample_what & SAMPLER_KSTACK) {
- kperf_kcallstack_log( &sbuf->kcallstack );
+ kperf_kcallstack_log(&sbuf->kcallstack);
+ }
+ if (sample_what & SAMPLER_TH_INSCYC) {
+ kperf_thread_inscyc_log(context);
+ }
+ if (sample_what & SAMPLER_TK_SNAPSHOT) {
+ kperf_task_snapshot_log(&(sbuf->tk_snapshot));
+ }
+ if (sample_what & SAMPLER_TK_INFO) {
+ kperf_task_info_log(context);
}
/* dump user stuff */
}
if (sample_flags & SAMPLE_FLAG_PEND_USER) {
- if (did_ucallstack) {
- BUF_INFO1(PERF_CS_UPEND, 0);
+ if (pended_ucallstack) {
+ BUF_INFO(PERF_CS_UPEND);
}
- if (did_tinfo_extra) {
- BUF_INFO1(PERF_TI_XPEND, 0);
+ if (pended_th_dispatch) {
+ BUF_INFO(PERF_TI_DISPPEND);
}
} else {
if (sample_what & SAMPLER_USTACK) {
kperf_ucallstack_log(&(sbuf->ucallstack));
}
- if (sample_what & SAMPLER_TINFOEX) {
- kperf_threadinfo_extra_log(&(sbuf->tinfo_ex));
+ if (sample_what & SAMPLER_TH_DISPATCH) {
+ kperf_thread_dispatch_log(&(sbuf->th_dispatch));
}
}
}
kperf_kpc_cpu_log(&(sbuf->kpcdata));
}
- BUF_DATA1(PERF_GEN_EVENT | DBG_FUNC_END, sample_what);
+log_sample_end:
+ BUF_DATA(PERF_GEN_EVENT | DBG_FUNC_END, sample_what, on_idle_thread ? 1 : 0);
/* intrs back on */
ml_set_interrupts_enabled(enabled);
struct kperf_context *context,
unsigned actionid, unsigned sample_flags)
{
- unsigned sample_what = 0;
- int pid_filter;
-
/* work out what to sample, if anything */
if ((actionid > actionc) || (actionid == 0)) {
return SAMPLE_SHUTDOWN;
/* check the pid filter against the context's current pid.
* filter pid == -1 means any pid
*/
- pid_filter = actionv[actionid - 1].pid_filter;
+ int pid_filter = actionv[actionid - 1].pid_filter;
if ((pid_filter != -1) && (pid_filter != context->cur_pid)) {
return SAMPLE_CONTINUE;
}
/* the samplers to run */
- sample_what = actionv[actionid - 1].sample;
+ unsigned int sample_what = actionv[actionid - 1].sample;
/* do the actual sample operation */
return kperf_sample_internal(sbuf, context, sample_what,
- sample_flags, actionid);
+ sample_flags, actionid,
+ actionv[actionid - 1].ucallstack_depth);
}
-/* ast callback on a thread */
void
-kperf_thread_ast_handler(thread_t thread)
+kperf_kdebug_handler(uint32_t debugid, uintptr_t *starting_fp)
{
- int r;
- uint32_t t_chud;
- unsigned sample_what = 0;
- /* we know we're on a thread, so let's do stuff */
- task_t task = NULL;
-
- BUF_INFO1(PERF_AST_HNDLR | DBG_FUNC_START, thread);
+ uint32_t sample_flags = SAMPLE_FLAG_PEND_USER;
+ struct kperf_sample *sample = NULL;
+ kern_return_t kr = KERN_SUCCESS;
+ int s;
- /* use ~2kb of the stack for the sample, should be ok since we're in the ast */
- struct kperf_sample sbuf;
- memset(&sbuf, 0, sizeof(struct kperf_sample));
-
- /* make a context, take a sample */
- struct kperf_context ctx;
- ctx.cur_thread = thread;
- ctx.cur_pid = -1;
-
- task = chudxnu_task_for_thread(thread);
- if (task) {
- ctx.cur_pid = chudxnu_pid_for_task(task);
- }
-
- /* decode the chud bits so we know what to sample */
- t_chud = kperf_get_thread_bits(thread);
-
- if (t_chud & T_AST_NAME) {
- sample_what |= SAMPLER_TINFOEX;
+ if (!kperf_kdebug_should_trigger(debugid)) {
+ return;
}
- if (t_chud & T_AST_CALLSTACK) {
- sample_what |= SAMPLER_USTACK;
- sample_what |= SAMPLER_TINFO;
- }
+ BUF_VERB(PERF_KDBG_HNDLR | DBG_FUNC_START, debugid);
- /* do the sample, just of the user stuff */
- r = kperf_sample_internal(&sbuf, &ctx, sample_what, 0, 0);
+ thread_t thread = current_thread();
+ task_t task = get_threadtask(thread);
+ struct kperf_context ctx = {
+ .cur_thread = thread,
+ .cur_task = task,
+ .cur_pid = task_pid(task),
+ .trigger_type = TRIGGER_TYPE_KDEBUG,
+ .trigger_id = 0,
+ };
- BUF_INFO1(PERF_AST_HNDLR | DBG_FUNC_END, r);
-}
+ s = ml_set_interrupts_enabled(0);
-/* register AST bits */
-int
-kperf_ast_pend(thread_t cur_thread, uint32_t check_bits,
- uint32_t set_bits)
-{
- /* pend on the thread */
- uint32_t t_chud, set_done = 0;
+ sample = kperf_intr_sample_buffer();
- /* can only pend on the current thread */
- if (cur_thread != chudxnu_current_thread()) {
- panic("pending to non-current thread");
+ if (!ml_at_interrupt_context()) {
+ sample_flags |= SAMPLE_FLAG_NON_INTERRUPT;
+ ctx.starting_fp = starting_fp;
}
- /* get our current bits */
- t_chud = kperf_get_thread_bits(cur_thread);
-
- /* see if it's already been done or pended */
- if (!(t_chud & check_bits)) {
- /* set the bit on the thread */
- t_chud |= set_bits;
- kperf_set_thread_bits(cur_thread, t_chud);
+ kr = kperf_sample(sample, &ctx, kperf_kdebug_get_action(), sample_flags);
- /* set the actual AST */
- kperf_set_thread_ast(cur_thread);
-
- set_done = 1;
- }
-
- return set_done;
+ ml_set_interrupts_enabled(s);
+ BUF_VERB(PERF_KDBG_HNDLR | DBG_FUNC_END, kr);
}
/*
- * kdebug callback & stack management
+ * This function allocates >2.3KB of the stack. Prevent the compiler from
+ * inlining this function into ast_taken and ensure the stack memory is only
+ * allocated for the kperf AST.
*/
-
-#define IS_END(debugid) ((debugid & 3) == DBG_FUNC_END)
-#define IS_MIG(debugid) (IS_END(debugid) && ((debugid & 0xff000000U) == KDBG_CLASS_ENCODE((unsigned)DBG_MIG, 0U)))
-#define IS_MACH_SYSCALL(debugid) (IS_END(debugid) && (KDBG_CLASS_DECODE(debugid) == KDBG_CLASS_ENCODE(DBG_MACH, DBG_MACH_EXCP_SC)))
-#define IS_VM_FAULT(debugid) (IS_END(debugid) && (KDBG_CLASS_DECODE(debugid) == KDBG_CLASS_ENCODE(DBG_MACH, DBG_MACH_VM)))
-#define IS_BSD_SYSCTLL(debugid) (IS_END(debugid) && (KDBG_CLASS_DECODE(debugid) == KDBG_CLASS_ENCODE(DBG_BSD, DBG_BSD_EXCP_SC)))
-#define IS_APPS_SIGNPOST(debugid) (KDBG_CLASS_DECODE(debugid) == KDBG_CLASS_ENCODE(DBG_APPS, DBG_MACH_CHUD))
-#define IS_MACH_SIGNPOST(debugid) (KDBG_CLASS_DECODE(debugid) == KDBG_CLASS_ENCODE(DBG_MACH, DBG_MACH_CHUD))
-#define IS_ENERGYTRACE(debugid) ((debugid & 0xff000000U) == KDBG_CLASS_ENCODE((unsigned)DBG_ENERGYTRACE, 0U))
-
+__attribute__((noinline))
void
-kperf_kdebug_callback(uint32_t debugid)
+kperf_thread_ast_handler(thread_t thread)
{
- int cur_pid = 0;
- task_t task = NULL;
+ BUF_INFO(PERF_AST_HNDLR | DBG_FUNC_START, thread, kperf_get_thread_flags(thread));
- if (!kdebug_callstacks && !kperf_signpost_action) {
- return;
- }
-
- /* if we're looking at a kperf tracepoint, don't recurse */
- if ((debugid & 0xff000000) == KDBG_CLASS_ENCODE(DBG_PERF, 0)) {
- return;
- }
-
- /* ensure interrupts are already off thanks to kdebug */
- if (ml_get_interrupts_enabled()) {
- return;
- }
+ /* ~2KB of the stack for the sample since this is called from AST */
+ struct kperf_sample sbuf;
+ memset(&sbuf, 0, sizeof(struct kperf_sample));
- /* make sure we're not being called recursively. */
-#if NOTYET
- if (kperf_kdbg_recurse(KPERF_RECURSE_IN)) {
- return;
- }
-#endif
+ task_t task = get_threadtask(thread);
- /* check the happy list of trace codes */
- if(!(IS_MIG(debugid)
- || IS_MACH_SYSCALL(debugid)
- || IS_VM_FAULT(debugid)
- || IS_BSD_SYSCTLL(debugid)
- || IS_MACH_SIGNPOST(debugid)
- || IS_ENERGYTRACE(debugid)
- || IS_APPS_SIGNPOST(debugid)))
- {
+ if (task_did_exec(task) || task_is_exec_copy(task)) {
+ BUF_INFO(PERF_AST_HNDLR | DBG_FUNC_END, SAMPLE_CONTINUE);
return;
}
- /* check for kernel */
- thread_t thread = chudxnu_current_thread();
- task = chudxnu_task_for_thread(thread);
- if (task) {
- cur_pid = chudxnu_pid_for_task(task);
- }
- if (!cur_pid) {
- return;
- }
+ /* make a context, take a sample */
+ struct kperf_context ctx = {
+ .cur_thread = thread,
+ .cur_task = task,
+ .cur_pid = task_pid(task),
+ };
- if (kdebug_callstacks) {
- /* dicing with death */
- BUF_INFO2(PERF_KDBG_HNDLR, debugid, cur_pid);
+ /* decode the flags to determine what to sample */
+ unsigned int sample_what = 0;
+ uint32_t flags = kperf_get_thread_flags(thread);
- /* pend the AST */
- kperf_ast_pend( thread, T_AST_CALLSTACK, T_AST_CALLSTACK );
+ if (flags & T_KPERF_AST_DISPATCH) {
+ sample_what |= SAMPLER_TH_DISPATCH;
}
-
- if (kperf_signpost_action && (IS_MACH_SIGNPOST(debugid)
- || IS_APPS_SIGNPOST(debugid)))
- {
-#if NOTYET
- /* make sure we're not being called recursively. */
- if(kperf_kdbg_recurse(KPERF_RECURSE_IN)) {
- return;
- }
-#endif
-
- /* setup a context */
- struct kperf_context ctx;
- struct kperf_sample *intbuf = NULL;
- BUF_INFO2(PERF_SIGNPOST_HNDLR | DBG_FUNC_START, debugid, cur_pid);
-
- ctx.cur_thread = thread;
- ctx.cur_pid = cur_pid;
- ctx.trigger_type = TRIGGER_TYPE_TRACE;
- ctx.trigger_id = 0;
-
- /* CPU sample buffer -- only valid with interrupts off (above)
- * Technically this isn't true -- tracepoints can, and often
- * are, cut from interrupt handlers, but none of those tracepoints
- * should make it this far.
- */
- intbuf = kperf_intr_sample_buffer();
-
- /* do the sample */
- kperf_sample(intbuf, &ctx, kperf_signpost_action,
- SAMPLE_FLAG_PEND_USER);
-
- BUF_INFO2(PERF_SIGNPOST_HNDLR | DBG_FUNC_END, debugid, cur_pid);
-#if NOTYET
- /* no longer recursive */
- kperf_kdbg_recurse(KPERF_RECURSE_OUT);
-#endif
+ if (flags & T_KPERF_AST_CALLSTACK) {
+ sample_what |= SAMPLER_USTACK;
+ sample_what |= SAMPLER_TH_INFO;
}
-}
-static void
-kperf_kdbg_callback_update(void)
-{
- unsigned old_callback_set = kperf_kdbg_callback_set;
+ uint32_t ucallstack_depth = T_KPERF_GET_CALLSTACK_DEPTH(flags);
- /* compute new callback state */
- kperf_kdbg_callback_set = kdebug_callstacks || kperf_signpost_action;
+ int r = kperf_sample_internal(&sbuf, &ctx, sample_what, 0, 0, ucallstack_depth);
- if (old_callback_set && !kperf_kdbg_callback_set) {
- /* callback should no longer be set */
- chudxnu_kdebug_callback_cancel();
- } else if (!old_callback_set && kperf_kdbg_callback_set) {
- /* callback must now be set */
- chudxnu_kdebug_callback_enter(NULL);
- }
-}
-
-int
-kperf_kdbg_get_stacks(void)
-{
- return kdebug_callstacks;
+ BUF_INFO(PERF_AST_HNDLR | DBG_FUNC_END, r);
}
+/* register AST bits */
int
-kperf_kdbg_set_stacks(int newval)
+kperf_ast_pend(thread_t thread, uint32_t set_flags)
{
- kdebug_callstacks = newval;
- kperf_kdbg_callback_update();
+ /* can only pend on the current thread */
+ if (thread != current_thread()) {
+ panic("pending to non-current thread");
+ }
- return 0;
-}
+ /* get our current bits */
+ uint32_t flags = kperf_get_thread_flags(thread);
-int
-kperf_signpost_action_get(void)
-{
- return kperf_signpost_action;
-}
+ /* 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);
-int
-kperf_signpost_action_set(int newval)
-{
- kperf_signpost_action = newval;
- kperf_kdbg_callback_update();
+ /* set the actual AST */
+ act_set_kperf(thread);
+ return 1;
+ }
return 0;
}
-/*
- * Thread switch
- */
-
-/* called from context switch handler */
void
-kperf_switch_context(__unused thread_t old, thread_t new)
+kperf_ast_set_callstack_depth(thread_t thread, uint32_t depth)
{
- task_t task = get_threadtask(new);
- int pid = chudxnu_pid_for_task(task);
-
- /* cut a tracepoint to tell us what the new thread's PID is
- * for Instruments
- */
- BUF_DATA2(PERF_TI_CSWITCH, thread_tid(new), pid);
-
- /* trigger action after counters have been updated */
- if (kperf_cswitch_action) {
- struct kperf_sample sbuf;
- struct kperf_context ctx;
- int r;
+ uint32_t ast_flags = kperf_get_thread_flags(thread);
+ uint32_t existing_callstack_depth = T_KPERF_GET_CALLSTACK_DEPTH(ast_flags);
- BUF_DATA1(PERF_CSWITCH_HNDLR | DBG_FUNC_START, 0);
+ if (existing_callstack_depth != depth) {
+ ast_flags &= ~T_KPERF_SET_CALLSTACK_DEPTH(depth);
+ ast_flags |= T_KPERF_SET_CALLSTACK_DEPTH(depth);
- ctx.cur_pid = 0;
- ctx.cur_thread = old;
-
- /* get PID for context */
- task_t old_task = chudxnu_task_for_thread(ctx.cur_thread);
- if (old_task) {
- ctx.cur_pid = chudxnu_pid_for_task(old_task);
- }
-
- ctx.trigger_type = TRIGGER_TYPE_CSWITCH;
- ctx.trigger_id = 0;
-
- r = kperf_sample(&sbuf, &ctx, kperf_cswitch_action,
- SAMPLE_FLAG_PEND_USER);
-
- BUF_INFO1(PERF_CSWITCH_HNDLR | DBG_FUNC_END, r);
+ kperf_set_thread_flags(thread, ast_flags);
}
}
-static void
-kperf_cswitch_callback_update(void)
-{
- unsigned old_callback_set = kperf_cswitch_callback_set;
-
- unsigned new_callback_set = kdebug_cswitch || kperf_cswitch_action;
-
- if (old_callback_set && !new_callback_set) {
- kperf_cswitch_callback_set = 0;
- } else if (!old_callback_set && new_callback_set) {
- kperf_cswitch_callback_set = 1;
- } else {
- return;
- }
-
- kperf_kpc_cswitch_callback_update();
-}
-
int
kperf_kdbg_cswitch_get(void)
{
- return kdebug_cswitch;
+ return kperf_kdebug_cswitch;
}
int
kperf_kdbg_cswitch_set(int newval)
{
- kdebug_cswitch = newval;
- kperf_cswitch_callback_update();
-
- return 0;
-}
-
-int
-kperf_cswitch_action_get(void)
-{
- return kperf_cswitch_action;
-}
-
-int
-kperf_cswitch_action_set(int newval)
-{
- kperf_cswitch_action = newval;
- kperf_cswitch_callback_update();
+ kperf_kdebug_cswitch = newval;
+ kperf_on_cpu_update();
return 0;
}
/*
* Action configuration
*/
-unsigned
+unsigned int
kperf_action_get_count(void)
{
return actionc;
return 0;
}
+void
+kperf_action_reset(void)
+{
+ for (unsigned int i = 0; i < actionc; i++) {
+ kperf_action_set_samplers(i + 1, 0);
+ kperf_action_set_userdata(i + 1, 0);
+ kperf_action_set_filter(i + 1, -1);
+ kperf_action_set_ucallstack_depth(i + 1, MAX_CALLSTACK_FRAMES);
+ kperf_action_set_kcallstack_depth(i + 1, MAX_CALLSTACK_FRAMES);
+ }
+}
+
int
kperf_action_set_count(unsigned count)
{
struct action *new_actionv = NULL, *old_actionv = NULL;
- unsigned old_count, i;
+ unsigned old_count;
/* easy no-op */
if (count == actionc) {
*/
if (actionc == 0) {
int r;
- r = kperf_init();
-
- if (r != 0) {
+ if ((r = kperf_init())) {
return r;
}
}
/* create a new array */
- new_actionv = kalloc(count * sizeof(*new_actionv));
+ new_actionv = kalloc_tag(count * sizeof(*new_actionv), VM_KERN_MEMORY_DIAG);
if (new_actionv == NULL) {
return ENOMEM;
}
memset(&(new_actionv[actionc]), 0, (count - old_count) * sizeof(*actionv));
- for (i = old_count; i < count; i++) {
+ for (unsigned int i = old_count; i < count; i++) {
new_actionv[i].pid_filter = -1;
+ new_actionv[i].ucallstack_depth = MAX_CALLSTACK_FRAMES;
+ new_actionv[i].kcallstack_depth = MAX_CALLSTACK_FRAMES;
}
actionv = new_actionv;
return 0;
}
+
+int
+kperf_action_set_ucallstack_depth(unsigned action_id, uint32_t depth)
+{
+ if ((action_id > actionc) || (action_id == 0)) {
+ return EINVAL;
+ }
+
+ if (depth > MAX_CALLSTACK_FRAMES) {
+ return EINVAL;
+ }
+
+ actionv[action_id - 1].ucallstack_depth = depth;
+
+ return 0;
+}
+
+int
+kperf_action_set_kcallstack_depth(unsigned action_id, uint32_t depth)
+{
+ if ((action_id > actionc) || (action_id == 0)) {
+ return EINVAL;
+ }
+
+ if (depth > MAX_CALLSTACK_FRAMES) {
+ return EINVAL;
+ }
+
+ actionv[action_id - 1].kcallstack_depth = depth;
+
+ return 0;
+}
+
+int
+kperf_action_get_ucallstack_depth(unsigned action_id, uint32_t * depth_out)
+{
+ if ((action_id > actionc)) {
+ return EINVAL;
+ }
+
+ assert(depth_out);
+
+ if (action_id == 0) {
+ *depth_out = MAX_CALLSTACK_FRAMES;
+ } else {
+ *depth_out = actionv[action_id - 1].ucallstack_depth;
+ }
+
+ return 0;
+}
+
+int
+kperf_action_get_kcallstack_depth(unsigned action_id, uint32_t * depth_out)
+{
+ if ((action_id > actionc)) {
+ return EINVAL;
+ }
+
+ assert(depth_out);
+
+ if (action_id == 0) {
+ *depth_out = MAX_CALLSTACK_FRAMES;
+ } else {
+ *depth_out = actionv[action_id - 1].kcallstack_depth;
+ }
+
+ return 0;
+}
projects / apple / xnu.git / blobdiff