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Add kernel stack traces to kprobes events #1429

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merged 11 commits into from
Oct 11, 2023
Merged

Add kernel stack traces to kprobes events #1429

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d94d182
use a bitwise flag in MsgCommon to indicate return kprobe event
mtardy Aug 23, 2023
1aa0b04
feat: add a new stack trace option to post action
mtardy Aug 25, 2023
4aea361
chore: generate and vendor auto-generated files
mtardy Aug 25, 2023
39caa29
tetra: add stack traces human output to compact mode
mtardy Sep 5, 2023
64af669
docs: update doc related to rate limiting feature
mtardy Sep 5, 2023
eb7eefc
docs: add doc for stack trace feature
mtardy Sep 5, 2023
2da3d79
pkg/ksyms: fix a potential null pointer dereference
mtardy Sep 6, 2023
4c98d70
stack traces: add a flag to opt-in for kernel address exposure
mtardy Sep 29, 2023
983a2dd
cmd/tetragon: remove useless check in flags reading
mtardy Sep 29, 2023
af73cde
pkg/sensors/tracing: add a basic stack trace test
mtardy Oct 10, 2023
8c8c274
pkg/sensors: fix kprobeEntry.pinPathPrefix for multi kprobes
mtardy Oct 10, 2023
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19 changes: 19 additions & 0 deletions api/v1/README.md
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Original file line number Diff line number Diff line change
Expand Up @@ -44,6 +44,7 @@
- [ProcessUprobe](#tetragon-ProcessUprobe)
- [RuntimeHookRequest](#tetragon-RuntimeHookRequest)
- [RuntimeHookResponse](#tetragon-RuntimeHookResponse)
- [StackTraceEntry](#tetragon-StackTraceEntry)
- [Test](#tetragon-Test)
- [UserNamespace](#tetragon-UserNamespace)

Expand Down Expand Up @@ -786,6 +787,7 @@ https://github.com/opencontainers/runtime-spec/blob/main/config.md#createcontain
| args | [KprobeArgument](#tetragon-KprobeArgument) | repeated | Arguments definition of the observed kprobe. |
| return | [KprobeArgument](#tetragon-KprobeArgument) | | Return value definition of the observed kprobe. |
| action | [KprobeAction](#tetragon-KprobeAction) | | Action performed when the kprobe matched. |
| stack_trace | [StackTraceEntry](#tetragon-StackTraceEntry) | repeated | Kernel stack trace to the call. |



Expand Down Expand Up @@ -871,6 +873,23 @@ RuntimeHookRequest synchronously propagates information to the agent about run-t



<a name="tetragon-StackTraceEntry"></a>

### StackTraceEntry



| Field | Type | Label | Description |
| ----- | ---- | ----- | ----------- |
| address | [uint64](#uint64) | | address is the kernel function address. |
| offset | [uint64](#uint64) | | offset is the offset into the native instructions for the function. |
| symbol | [string](#string) | | symbol is the symbol name of the function. |






<a name="tetragon-Test"></a>

### Test
Expand Down
207 changes: 207 additions & 0 deletions api/v1/tetragon/codegen/eventchecker/eventchecker.pb.go
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