Greg Hackmann e178a5beb3 gcov: clang support ... LLVM uses profiling data that's deliberately similar to GCC, but has a very different way of exporting that data. LLVM calls llvm_gcov_init() once per module, and provides a couple of callbacks that we can use to ask for more data. We care about the "writeout" callback, which in turn calls back into compiler-rt/this module to dump all the gathered coverage data to disk: llvm_gcda_start_file() llvm_gcda_emit_function() llvm_gcda_emit_arcs() llvm_gcda_emit_function() llvm_gcda_emit_arcs() [... repeats for each function ...] llvm_gcda_summary_info() llvm_gcda_end_file() This design is much more stateless and unstructured than gcc's, and is intended to run at process exit. This forces us to keep some local state about which module we're dealing with at the moment. On the other hand, it also means we don't depend as much on how LLVM represents profiling data internally. See LLVM's lib/Transforms/Instrumentation/GCOVProfiling.cpp for more details on how this works, particularly GCOVProfiler::emitProfileArcs(), GCOVProfiler::insertCounterWriteout(), and GCOVProfiler::insertFlush(). [akpm@linux-foundation.org: coding-style fixes] Link: http://lkml.kernel.org/r/20190417225328.208129-1-trong@android.com Signed-off-by: Greg Hackmann <ghackmann@android.com> Signed-off-by: Nick Desaulniers <ndesaulniers@google.com> Signed-off-by: Tri Vo <trong@android.com> Co-developed-by: Nick Desaulniers <ndesaulniers@google.com> Co-developed-by: Tri Vo <trong@android.com> Tested-by: Trilok Soni <tsoni@quicinc.com> Tested-by: Prasad Sodagudi <psodagud@quicinc.com> Tested-by: Tri Vo <trong@android.com> Tested-by: Daniel Mentz <danielmentz@google.com> Tested-by: Petri Gynther <pgynther@google.com> Reviewed-by: Peter Oberparleiter <oberpar@linux.ibm.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>		2019-05-14 19:52:51 -07:00
..
bpf	bpf: fix undefined behavior in narrow load handling	2019-05-13 02:05:50 +02:00
cgroup	kernel/sched/psi.c: expose pressure metrics on root cgroup	2019-05-14 19:52:48 -07:00
configs	…
debug	kdb: use bool for binary state indicators	2018-12-30 08:31:52 +00:00
dma	DMA mapping updates for 5.2	2019-05-09 08:40:55 -07:00
events	mm/mmu_notifier: use correct mmu_notifier events for each invalidation	2019-05-14 09:47:49 -07:00
gcov	gcov: clang support	2019-05-14 19:52:51 -07:00
irq	Driver core/kobject patches for 5.2-rc1	2019-05-07 13:01:40 -07:00
livepatch	Driver core/kobject patches for 5.2-rc1	2019-05-07 13:01:40 -07:00
locking	Remove Mysterious Macro Intended to Obscure Weird Behaviours (mmiowb())	2019-05-06 16:57:52 -07:00
power	Power management updates for 5.2-rc1	2019-05-06 19:40:31 -07:00
printk	fbdev changes for v5.1:	2019-03-15 14:22:59 -07:00
rcu	Printk changes for 5.2	2019-05-07 09:18:12 -07:00
sched	kernel/sched/psi.c: expose pressure metrics on root cgroup	2019-05-14 19:52:48 -07:00
time	Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net-next	2019-05-07 22:03:58 -07:00
trace	This is the bulk of the GPIO changes for the v5.2 kernel cycle:	2019-05-11 10:54:43 -04:00
.gitignore	Provide in-kernel headers to make extending kernel easier	2019-04-29 16:48:03 +02:00
Kconfig.freezer	…
Kconfig.hz	…
Kconfig.locks	Remove Mysterious Macro Intended to Obscure Weird Behaviours (mmiowb())	2019-05-06 16:57:52 -07:00
Kconfig.preempt	kconfig: warn no new line at end of file	2018-12-15 17:44:35 +09:00
Makefile	kernel/Makefile: don't assume that kernel/gen_ikh_data.sh is executable	2019-05-14 19:52:47 -07:00
acct.c	acct_on(): don't mess with freeze protection	2019-04-04 21:04:13 -04:00
async.c	treewide: Switch printk users from %pf and %pF to %ps and %pS, respectively	2019-04-09 14:19:06 +02:00
audit.c	audit: connect LOGIN record to its syscall record	2019-03-20 20:57:48 -04:00
audit.h	audit_compare_dname_path(): switch to const struct qstr *	2019-04-28 20:33:43 -04:00
audit_fsnotify.c	audit_compare_dname_path(): switch to const struct qstr *	2019-04-28 20:33:43 -04:00
audit_tree.c	fsnotify: switch send_to_group() and ->handle_event to const struct qstr *	2019-04-26 13:51:03 -04:00
audit_watch.c	audit_compare_dname_path(): switch to const struct qstr *	2019-04-28 20:33:43 -04:00
auditfilter.c	Merge branch 'work.dcache' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs	2019-05-07 20:03:32 -07:00
auditsc.c	Merge branch 'work.dcache' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs	2019-05-07 20:03:32 -07:00
backtracetest.c	backtrace-test: Simplify stack trace handling	2019-04-29 12:37:47 +02:00
bounds.c	…
capability.c	LSM: add SafeSetID module that gates setid calls	2019-01-25 11:22:43 -08:00
compat.c	time: make adjtime compat handling available for 32 bit	2019-02-07 00:13:27 +01:00
configs.c	kernel/configs: use .incbin directive to embed config_data.gz	2019-03-07 18:32:02 -08:00
context_tracking.c	…
cpu.c	Merge branch 'timers-core-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip	2019-05-06 14:50:46 -07:00
cpu_pm.c	…
crash_core.c	kexec: export PG_offline to VMCOREINFO	2019-03-05 21:07:14 -08:00
crash_dump.c	…
cred.c	SELinux: Remove cred security blob poisoning	2019-01-08 13:18:44 -08:00
delayacct.c	…
dma.c	…
elfcore.c	…
exec_domain.c	…
exit.c	mm: change mm_update_next_owner() to update mm->owner with WRITE_ONCE	2019-05-14 19:52:47 -07:00
extable.c	…
fail_function.c	treewide: Switch printk users from %pf and %pF to %ps and %pS, respectively	2019-04-09 14:19:06 +02:00
fork.c	kernel/latencytop.c: rename clear_all_latency_tracing to clear_tsk_latency_tracing	2019-05-14 19:52:49 -07:00
freezer.c	…
futex.c	mm/gup: change GUP fast to use flags rather than a write 'bool'	2019-05-14 09:47:46 -07:00
gen_ikh_data.sh	Provide in-kernel headers to make extending kernel easier	2019-04-29 16:48:03 +02:00
groups.c	…
hung_task.c	kernel/hung_task.c: Use continuously blocked time when reporting.	2019-03-07 18:31:59 -08:00
iomem.c	mm/resource: Use resource_overlaps() to simplify region_intersects()	2019-04-19 12:59:36 +02:00
irq_work.c	irq_work: Do not raise an IPI when queueing work on the local CPU	2019-04-18 14:07:52 +02:00
jump_label.c	locking/static_key: Don't take sleeping locks in __static_key_slow_dec_deferred()	2019-04-29 08:29:21 +02:00
kallsyms.c	bpf: Add module name [bpf] to ksymbols for bpf programs	2019-01-21 17:38:56 -03:00
kcmp.c	…
kcov.c	kcov: convert kcov.refcount to refcount_t	2019-03-07 18:32:02 -08:00
kexec.c	…
kexec_core.c	power/suspend: Add function to disable secondaries for suspend	2019-05-03 19:42:41 +02:00
kexec_file.c	mm: memblock: make keeping memblock memory opt-in rather than opt-out	2019-05-14 09:47:50 -07:00
kexec_internal.h	…
kheaders.c	Provide in-kernel headers to make extending kernel easier	2019-04-29 16:48:03 +02:00
kmod.c	…
kprobes.c	kprobes: Fix error check when reusing optimized probes	2019-04-16 09:38:16 +02:00
ksysfs.c	…
kthread.c	include/: refactor headers to allow kthread.h inclusion in psi_types.h	2019-05-14 19:52:48 -07:00
latencytop.c	kernel/latencytop.c: rename clear_all_latency_tracing to clear_tsk_latency_tracing	2019-05-14 19:52:49 -07:00
memremap.c	kernel/memremap.c: remove the unused device_private_entry_fault() export	2019-05-14 09:47:51 -07:00
module-internal.h	…
module.c	Merge branch 'next-integrity' of git://git.kernel.org/pub/scm/linux/kernel/git/jmorris/linux-security	2019-05-09 12:54:40 -07:00
module_signing.c	…
notifier.c	kernel/notifier.c: double register detection	2019-05-14 19:52:49 -07:00
nsproxy.c	…
padata.c	padata: Replace padata_attr_type default_attrs field with groups	2019-04-25 22:06:11 +02:00
panic.c	s390: simplify disabled_wait	2019-05-02 13:54:11 +02:00
params.c	…
pid.c	kernel/pid.c: remove unneeded hash header file	2019-05-14 19:52:51 -07:00
pid_namespace.c	…
profile.c	…
ptrace.c	ptrace: take into account saved_sigmask in PTRACE{GET,SET}SIGMASK	2019-03-29 10:01:37 -07:00
range.c	…
reboot.c	…
relay.c	Merge branch 'work.misc' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs	2019-03-12 13:27:20 -07:00
resource.c	mm/resource: Use resource_overlaps() to simplify region_intersects()	2019-04-19 12:59:36 +02:00
rseq.c	rseq: Remove superfluous rseq_len from task_struct	2019-04-19 12:39:32 +02:00
seccomp.c	audit/stable-5.2 PR 20190507	2019-05-07 19:06:04 -07:00
signal.c	kernel/signal.c: annotate implicit fall through	2019-05-14 19:52:50 -07:00
smp.c	cpu/hotplug: Fix "SMT disabled by BIOS" detection for KVM	2019-01-30 19:27:00 +01:00
smpboot.c	…
smpboot.h	…
softirq.c	softirq: Remove tasklet_hrtimer	2019-03-22 14:36:02 +01:00
stackleak.c	stackleak: Mark stackleak_track_stack() as notrace	2018-12-05 19:31:44 -08:00
stacktrace.c	stacktrace: Provide common infrastructure	2019-04-29 12:37:57 +02:00
stop_machine.c	treewide: Switch printk users from %pf and %pF to %ps and %pS, respectively	2019-04-09 14:19:06 +02:00
sys.c	kernel/sys.c: prctl: fix false positive in validate_prctl_map()	2019-05-14 09:47:44 -07:00
sys_ni.c	signal: support CLONE_PIDFD with pidfd_send_signal	2019-05-07 14:31:03 +02:00
sysctl.c	kernel/sysctl.c: fix proc_do_large_bitmap for large input buffers	2019-05-14 19:52:51 -07:00
sysctl_binary.c	kernel/sysctl: add panic_print into sysctl	2019-01-04 13:13:47 -08:00
task_work.c	…
taskstats.c	genetlink: optionally validate strictly/dumps	2019-04-27 17:07:22 -04:00
test_kprobes.c	…
torture.c	torture: Don't try to offline the last CPU	2019-03-26 14:42:53 -07:00
tracepoint.c	tracing: Replace synchronize_sched() and call_rcu_sched()	2018-11-27 09:21:41 -08:00
tsacct.c	…
ucount.c	…
uid16.c	…
uid16.h	…
umh.c	umh: add exit routine for UMH process	2019-01-11 18:05:40 -08:00
up.c	…
user-return-notifier.c	…
user.c	kernel/user.c: clean up some leftover code	2019-05-14 19:52:49 -07:00
user_namespace.c	…
utsname.c	…
utsname_sysctl.c	…
watchdog.c	watchdog: Fix typo in comment	2019-04-18 14:05:51 +02:00
watchdog_hld.c	kernel/watchdog_hld.c: hard lockup message should end with a newline	2019-04-19 09:46:05 -07:00
workqueue.c	Merge branch 'for-5.2' of git://git.kernel.org/pub/scm/linux/kernel/git/tj/wq	2019-05-09 13:48:52 -07:00
workqueue_internal.h	sched/core, workqueues: Distangle worker accounting from rq lock	2019-04-16 16:55:15 +02:00