Song Liu fa28dcb82a bpf: Introduce helper bpf_get_task_stack() ... Introduce helper bpf_get_task_stack(), which dumps stack trace of given task. This is different to bpf_get_stack(), which gets stack track of current task. One potential use case of bpf_get_task_stack() is to call it from bpf_iter__task and dump all /proc/<pid>/stack to a seq_file. bpf_get_task_stack() uses stack_trace_save_tsk() instead of get_perf_callchain() for kernel stack. The benefit of this choice is that stack_trace_save_tsk() doesn't require changes in arch/. The downside of using stack_trace_save_tsk() is that stack_trace_save_tsk() dumps the stack trace to unsigned long array. For 32-bit systems, we need to translate it to u64 array. Signed-off-by: Song Liu <songliubraving@fb.com> Signed-off-by: Alexei Starovoitov <ast@kernel.org> Acked-by: Andrii Nakryiko <andriin@fb.com> Link: https://lore.kernel.org/bpf/20200630062846.664389-3-songliubraving@fb.com		2020-07-01 08:23:19 -07:00
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arraymap.c	bpf: Remove redundant synchronize_rcu.	2020-07-01 08:07:13 -07:00
bpf_iter.c	bpf: Enable bpf_iter targets registering ctx argument types	2020-05-13 12:30:50 -07:00
bpf_lru_list.c
bpf_lru_list.h	bpf: Fix a typo "inacitve" -> "inactive"	2020-04-06 21:54:10 +02:00
bpf_lsm.c	bpf: Use tracing helpers for lsm programs	2020-06-01 15:08:04 -07:00
bpf_struct_ops.c	bpf: Set map_btf_{name, id} for all map types	2020-06-22 22:22:58 +02:00
bpf_struct_ops_types.h	bpf: tcp: Support tcp_congestion_ops in bpf	2020-01-09 08:46:18 -08:00
btf.c	bpf: Add bpf_skc_to_tcp6_sock() helper	2020-06-24 18:37:59 -07:00
cgroup.c	bpf: cgroup: Allow multi-attach program to replace itself	2020-06-09 11:21:43 -07:00
core.c	Merge git://git.kernel.org/pub/scm/linux/kernel/git/netdev/net-next	2020-06-03 16:27:18 -07:00
cpumap.c	bpf: Set map_btf_{name, id} for all map types	2020-06-22 22:22:58 +02:00
devmap.c	bpf: Set map_btf_{name, id} for all map types	2020-06-22 22:22:58 +02:00
disasm.c
disasm.h
dispatcher.c	bpf: Remove bpf_image tree	2020-03-13 12:49:52 -07:00
hashtab.c	bpf: Remove redundant synchronize_rcu.	2020-07-01 08:07:13 -07:00
helpers.c	bpf: Implement BPF ring buffer and verifier support for it	2020-06-01 14:38:22 -07:00
inode.c	bpf: Create file bpf iterator	2020-05-09 17:05:26 -07:00
local_storage.c	bpf: Set map_btf_{name, id} for all map types	2020-06-22 22:22:58 +02:00
lpm_trie.c	bpf: Remove redundant synchronize_rcu.	2020-07-01 08:07:13 -07:00
Makefile	flow_dissector: Move out netns_bpf prog callbacks	2020-06-01 15:21:02 -07:00
map_in_map.c	bpf: Implement CAP_BPF	2020-05-15 17:29:41 +02:00
map_in_map.h
map_iter.c	bpf: Enable bpf_iter targets registering ctx argument types	2020-05-13 12:30:50 -07:00
net_namespace.c	bpf: Add link-based BPF program attachment to network namespace	2020-06-01 15:21:03 -07:00
offload.c	bpf, offload: Replace bitwise AND by logical AND in bpf_prog_offload_info_fill	2020-02-17 16:53:49 +01:00
percpu_freelist.c	bpf: Dont iterate over possible CPUs with interrupts disabled	2020-02-24 16:18:20 -08:00
percpu_freelist.h
queue_stack_maps.c	bpf: Remove redundant synchronize_rcu.	2020-07-01 08:07:13 -07:00
reuseport_array.c	bpf: Remove redundant synchronize_rcu.	2020-07-01 08:07:13 -07:00
ringbuf.c	bpf: Remove redundant synchronize_rcu.	2020-07-01 08:07:13 -07:00
stackmap.c	bpf: Introduce helper bpf_get_task_stack()	2020-07-01 08:23:19 -07:00
syscall.c	Merge git://git.kernel.org/pub/scm/linux/kernel/git/netdev/net	2020-06-13 16:27:13 -07:00
sysfs_btf.c	bpf: Support llvm-objcopy for vmlinux BTF	2020-03-19 12:32:38 +01:00
task_iter.c	bpf: Fix bpf_iter's task iterator logic	2020-05-14 18:37:32 -07:00
tnum.c	bpf: Verifier, do explicit ALU32 bounds tracking	2020-03-30 14:59:53 -07:00
trampoline.c	bpf: lsm: Implement attach, detach and execution	2020-03-30 01:34:00 +02:00
verifier.c	bpf: Introduce helper bpf_get_task_stack()	2020-07-01 08:23:19 -07:00