Add support to dump processCache #2246
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tpapagian
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tixxdz
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Mar 22, 2024
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Much appreciated @tpapagian ;-)
When merged I will add a send signal to also dump this to logs
api/v1/tetragon/sensors.proto
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| @@ -118,6 +121,20 @@ message GetVersionResponse{ | |||
| string version = 1; | |||
| } | |||
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Could you please add comments here so they show up on gRPC reference doc, that this is for debugging only , do not use it
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Used generic GetDebugRequest rpc call.
| google.protobuf.UInt32Value refcnt = 3; | ||
| string refcntOps = 4; | ||
| } | ||
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same here and others, as we may change later have a generic debugDump with what to dump as an encoded operation for all type of dumps
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Also what does refcntOps mean here?
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same here and others, as we may change later have a generic debugDump with what to dump as an encoded operation for all type of dumps
Used generic GetDebugRequest rpc call.
Also what does refcntOps mean here?
Added a comment there.
| @@ -83,7 +83,7 @@ func GetProcessExec(event *MsgExecveEventUnix, useCache bool) *tetragon.ProcessE | |||
| } | |||
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| if parent != nil { | |||
| parent.RefInc() | |||
| parent.RefInc("parent") | |||
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maybe pass int constants and decode later to strings? up to you
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I make a try but this seems to complicate things a bit. So I would propose to keep that as it is if there are no objections from your side.
pkg/process/process.go
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| refcnt uint32 | ||
| color int // Writes should happen only inside gc select channel | ||
| refcnt uint32 | ||
| refcntOps map[string]int |
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What does refcntOps mean here? having some comments will help ;-)
pkg/process/cache.go
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| func (pc *Cache) refDec(p *ProcessInternal, reason string) { | ||
| p.refcntOpsLock.Lock() | ||
| if val, ok := p.refcntOps[reason]; ok { | ||
| p.refcntOps[reason] = val + 1 |
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I guess the reason here could be parent or process right? a bit confused why it is an increment? what value we get from this? my simplest suggestion would say having a separate track of increment and decrements could be better, but I'm missing something here ;-)
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This would be something like:
"refcntOps": {
"parent++": 2,
"parent--": 1,
"process++": 1
}which means that we count separately all increase and decrease operations. So the reason here can be: process++, process--, parent++, or parent--.
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mtardy
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Sep 9, 2024
This patch adds support to print the contents of process cache. This may be useful during debugging.
Example:
$ sudo ./tetra dump processCache
{"process":{"exec_id":"YXBhcGFnLXVidW50dS1kZXY6MTAwNjgwMDAwMDAwOjE4OTg=", "pid":1898, "uid":1010, "cwd":"/home/apapag", "binary":"/home/apapag/.vscode-server/cli/servers/Stable-fee1edb8d6d72a0ddff41e5f71a671c23ed924b9/server/node", "arguments":"--dns-result-order=ipv4first /home/apapag/.vscode-server/cli/servers/Stable-fee1edb8d6d72a0ddff41e5f71a671c23ed924b9/server/out/bootstrap-fork --type=extensionHost --transformURIs --useHostProxy=false", "flags":"procFS auid", "start_time":"2024-09-05T07:00:23.274832687Z", "auid":1010, "parent_exec_id":"YXBhcGFnLXVidW50dS1kZXY6ODk5NTAwMDAwMDA6MTc3Ng==", "tid":1898}, "color":"inUse", "refcnt":5, "refcntOps":{"parent++":346, "parent--":342, "process++":1}}
{"process":{"exec_id":"YXBhcGFnLXVidW50dS1kZXY6MTU2OTQ0MDAwMDAwMDozMzM3OA==", "pid":33378, "uid":1010, "cwd":"/home/apapag/tetragon", "binary":"/usr/bin/bash", "flags":"procFS auid", "start_time":"2024-09-05T07:24:52.034832554Z", "auid":1010, "parent_exec_id":"YXBhcGFnLXVidW50dS1kZXY6MTU2OTIyMDAwMDAwMDozMzM3Nw==", "tid":33378}, "color":"inUse", "refcnt":2, "refcntOps":{"parent++":30, "parent--":29, "process++":1}}
{"process":{"exec_id":"YXBhcGFnLXVidW50dS1kZXY6Mjg1MjM2Nzc1Nzc4NDo1MjE1Mg==", "pid":52152, "uid":0, "cwd":"/home/apapag/tetragon", "binary":"/usr/bin/sudo", "arguments":"./tetra dump processCache --skip-zero-refcnt", "flags":"execve clone", "start_time":"2024-09-05T07:46:14.962590751Z", "auid":1010, "parent_exec_id":"YXBhcGFnLXVidW50dS1kZXY6MTU2OTQ0MDAwMDAwMDozMzM3OA==", "tid":52152}, "color":"inUse", "refcnt":2, "refcntOps":{"parent++":1, "process++":1}}
{"process":{"exec_id":"YXBhcGFnLXVidW50dS1kZXY6Mjg1MjM3NjMxOTI2OTo1MjE1NA==", "pid":52154, "uid":0, "cwd":"/home/apapag/tetragon", "binary":"/home/apapag/tetragon/tetra", "arguments":"dump processCache --skip-zero-refcnt", "flags":"execve clone", "start_time":"2024-09-05T07:46:14.971151996Z", "auid":1010, "parent_exec_id":"YXBhcGFnLXVidW50dS1kZXY6Mjg1MjM3NTU4MTQxMTo1MjE1Mw==", "tid":52154}, "color":"inUse", "refcnt":1, "refcntOps":{"process++":1}}
{"process":{"exec_id":"YXBhcGFnLXVidW50dS1kZXY6Mjg1MjM3NTU4MTQxMTo1MjE1Mw==", "pid":52153, "uid":0, "cwd":"/home/apapag/tetragon", "binary":"/usr/bin/sudo", "arguments":"./tetra dump processCache --skip-zero-refcnt", "flags":"execve", "start_time":"2024-09-05T07:46:14.970414578Z", "auid":1010, "parent_exec_id":"YXBhcGFnLXVidW50dS1kZXY6Mjg1MjM2Nzc1Nzc4NDo1MjE1Mg==", "refcnt":1, "tid":52153}, "color":"inUse", "refcnt":2, "refcntOps":{"parent++":2, "parent--":1, "process++":1}}
[...]
We also provide "--skip-zero-refcnt" command line argument to print only the entries with refcnt not equals to zero.
$ sudo ./tetra dump processCache --skip-zero-refcnt
{"process":{"exec_id":"YXBhcGFnLXVidW50dS1kZXY6MTAwNjgwMDAwMDAwOjE4OTg=", "pid":1898, "uid":1010, "cwd":"/home/apapag", "binary":"/home/apapag/.vscode-server/cli/servers/Stable-fee1edb8d6d72a0ddff41e5f71a671c23ed924b9/server/node", "arguments":"--dns-result-order=ipv4first /home/apapag/.vscode-server/cli/servers/Stable-fee1edb8d6d72a0ddff41e5f71a671c23ed924b9/server/out/bootstrap-fork --type=extensionHost --transformURIs --useHostProxy=false", "flags":"procFS auid", "start_time":"2024-09-05T07:00:23.274832687Z", "auid":1010, "parent_exec_id":"YXBhcGFnLXVidW50dS1kZXY6ODk5NTAwMDAwMDA6MTc3Ng==", "tid":1898}, "color":"inUse", "refcnt":5, "refcntOps":{"parent++":346, "parent--":342, "process++":1}}
{"process":{"exec_id":"YXBhcGFnLXVidW50dS1kZXY6MTU2OTQ0MDAwMDAwMDozMzM3OA==", "pid":33378, "uid":1010, "cwd":"/home/apapag/tetragon", "binary":"/usr/bin/bash", "flags":"procFS auid", "start_time":"2024-09-05T07:24:52.034832554Z", "auid":1010, "parent_exec_id":"YXBhcGFnLXVidW50dS1kZXY6MTU2OTIyMDAwMDAwMDozMzM3Nw==", "tid":33378}, "color":"inUse", "refcnt":2, "refcntOps":{"parent++":30, "parent--":29, "process++":1}}
{"process":{"exec_id":"YXBhcGFnLXVidW50dS1kZXY6Mjg1MjM2Nzc1Nzc4NDo1MjE1Mg==", "pid":52152, "uid":0, "cwd":"/home/apapag/tetragon", "binary":"/usr/bin/sudo", "arguments":"./tetra dump processCache --skip-zero-refcnt", "flags":"execve clone", "start_time":"2024-09-05T07:46:14.962590751Z", "auid":1010, "parent_exec_id":"YXBhcGFnLXVidW50dS1kZXY6MTU2OTQ0MDAwMDAwMDozMzM3OA==", "tid":52152}, "color":"inUse", "refcnt":2, "refcntOps":{"parent++":1, "process++":1}}
{"process":{"exec_id":"YXBhcGFnLXVidW50dS1kZXY6Mjg1MjM3NjMxOTI2OTo1MjE1NA==", "pid":52154, "uid":0, "cwd":"/home/apapag/tetragon", "binary":"/home/apapag/tetragon/tetra", "arguments":"dump processCache --skip-zero-refcnt", "flags":"execve clone", "start_time":"2024-09-05T07:46:14.971151996Z", "auid":1010, "parent_exec_id":"YXBhcGFnLXVidW50dS1kZXY6Mjg1MjM3NTU4MTQxMTo1MjE1Mw==", "tid":52154}, "color":"inUse", "refcnt":1, "refcntOps":{"process++":1}}
{"process":{"exec_id":"YXBhcGFnLXVidW50dS1kZXY6Mjg1MjM3NTU4MTQxMTo1MjE1Mw==", "pid":52153, "uid":0, "cwd":"/home/apapag/tetragon", "binary":"/usr/bin/sudo", "arguments":"./tetra dump processCache --skip-zero-refcnt", "flags":"execve", "start_time":"2024-09-05T07:46:14.970414578Z", "auid":1010, "parent_exec_id":"YXBhcGFnLXVidW50dS1kZXY6Mjg1MjM2Nzc1Nzc4NDo1MjE1Mg==", "refcnt":1, "tid":52153}, "color":"inUse", "refcnt":2, "refcntOps":{"parent++":2, "parent--":1, "process++":1}}
[...]
Signed-off-by: Anastasios Papagiannis <[email protected]>
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This patch adds support to print the contents of process cache. This may be useful during debugging.
Example:
We also provide "--skip-zero-refcnt" command line argument to print only the entries with refcnt not equals to zero.