Yonghong Song 8482941f09 bpf: Add bpf_send_signal_thread() helper ... Commit 8b401f9ed2 ("bpf: implement bpf_send_signal() helper") added helper bpf_send_signal() which permits bpf program to send a signal to the current process. The signal may be delivered to any threads in the process. We found a use case where sending the signal to the current thread is more preferable. - A bpf program will collect the stack trace and then send signal to the user application. - The user application will add some thread specific information to the just collected stack trace for later analysis. If bpf_send_signal() is used, user application will need to check whether the thread receiving the signal matches the thread collecting the stack by checking thread id. If not, it will need to send signal to another thread through pthread_kill(). This patch proposed a new helper bpf_send_signal_thread(), which sends the signal to the thread corresponding to the current kernel task. This way, user space is guaranteed that bpf_program execution context and user space signal handling context are the same thread. Signed-off-by: Yonghong Song <yhs@fb.com> Signed-off-by: Alexei Starovoitov <ast@kernel.org> Link: https://lore.kernel.org/bpf/20200115035002.602336-1-yhs@fb.com		2020-01-15 11:44:51 -08:00
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accounting
arch	tools arch x86: Sync asm/cpufeatures.h with the kernel sources	2019-12-02 15:20:05 -03:00
bpf	selftests/bpf: Build runqslower from selftests	2020-01-14 09:23:12 -08:00
build	perf tools: Allow to link with libbpf dynamicaly	2019-11-26 11:17:45 -03:00
cgroup
debugging
firewire
firmware
gpio	tools: gpio: Correctly add make dependencies for gpio_utils	2019-11-13 13:46:04 +01:00
hv	tools: hv: add vmbus testing tool	2019-11-21 20:10:44 -05:00
iio	tools: iio: Correctly add make dependency for iio_utils	2019-11-10 17:11:06 +00:00
include	bpf: Add bpf_send_signal_thread() helper	2020-01-15 11:44:51 -08:00
io_uring
kvm/kvm_stat
laptop
leds
lib	libbpf: Clean up bpf_helper_defs.h generation output	2020-01-13 17:48:13 -08:00
memory-model	tools/memory-model/Documentation: Add plain accesses and data races to explanation.txt	2019-10-05 11:59:44 -07:00
nfsd
objtool	Merge branch 'perf-core-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip	2019-11-26 15:04:47 -08:00
pci	tools: PCI: Fix fd leakage	2019-10-29 12:04:18 +00:00
pcmcia
perf	perf vendor events s390: Remove name from L1D_RO_EXCL_WRITES description	2019-12-16 13:40:26 -03:00
power	platform-drivers-x86 for v5.5-1	2019-12-01 18:24:25 -08:00
scripts
spi
testing	selftests/bpf: Build runqslower from selftests	2020-01-14 09:23:12 -08:00
thermal/tmon
time
usb	usbip: tools: fix fd leakage in the function of read_attr_usbip_status	2019-11-07 11:25:01 +01:00
virtio	tools/virtio: xen stub	2019-10-13 09:38:27 -04:00
vm
wmi
Makefile