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Wed, 9 Dec 2020 10:35:12 +0000 To: "lttng-dev@lists.lttng.org" Thread-Topic: lttng-ust callback on trace start Thread-Index: AdbOFnXJnK7W6P6xS0eXkM9vwDxk7A== Date: Wed, 9 Dec 2020 10:35:11 +0000 Message-ID: Accept-Language: de-DE, en-US Content-Language: en-US X-MS-Has-Attach: X-MS-TNEF-Correlator: msip_labels: MSIP_Label_f42aa342-8706-4288-bd11-ebb85995028c_ActionId=282a735a-4a91-4652-8d0e-7b3b936b9e00; MSIP_Label_f42aa342-8706-4288-bd11-ebb85995028c_ContentBits=0; MSIP_Label_f42aa342-8706-4288-bd11-ebb85995028c_Enabled=true; MSIP_Label_f42aa342-8706-4288-bd11-ebb85995028c_Method=Standard; MSIP_Label_f42aa342-8706-4288-bd11-ebb85995028c_Name=Internal; MSIP_Label_f42aa342-8706-4288-bd11-ebb85995028c_SetDate=2020-12-09T10:31:17Z; MSIP_Label_f42aa342-8706-4288-bd11-ebb85995028c_SiteId=72f988bf-86f1-41af-91ab-2d7cd011db47; x-originating-ip: [84.136.107.71] x-ms-publictraffictype: Email x-ms-office365-filtering-ht: Tenant x-ms-office365-filtering-correlation-id: 2c0fb85b-eb3f-4c4a-aba8-08d89c2e1bbf x-ms-traffictypediagnostic: VI1PR83MB0238: x-microsoft-antispam-prvs: x-ms-oob-tlc-oobclassifiers: OLM:8273; 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boundary="===============1137312241743210371==" Errors-To: lttng-dev-bounces@lists.lttng.org Sender: "lttng-dev" --===============1137312241743210371== Content-Language: en-US Content-Type: multipart/alternative; boundary="_000_VI1PR83MB03043DB4661F69C45DE0C6119BCC1VI1PR83MB0304EURP_" --_000_VI1PR83MB03043DB4661F69C45DE0C6119BCC1VI1PR83MB0304EURP_ Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: quoted-printable Hi, I searched the documentation and the source code for a while but didn't fin= d anything, is there any way to get a callback using the lttng-ust library when tracing= starts? E.g. I don't want to poll if a certain tracepoint is enabled. I wa= nt to get notified when any tracing starts. A notification when a specific = tracepoint is enabled would also be sufficient. -Ben --_000_VI1PR83MB03043DB4661F69C45DE0C6119BCC1VI1PR83MB0304EURP_ Content-Type: text/html; charset="us-ascii" Content-Transfer-Encoding: quoted-printable

Hi,

 

I searched the documentation an= d the source code for a while but didn’t find anything,

is there any way to get a callb= ack using the lttng-ust library when tracing starts? E.g. I don’t wan= t to poll if a certain tracepoint is enabled. I want to get notified when a= ny tracing starts. A notification when a specific tracepoint is enabled would also be sufficient.

 

-Ben

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