node/src/node_dtrace.h at master · greenjava/node · GitHub

History

61 lines (51 loc) · 1.71 KB

Raw

#ifndef SRC_NODE_DTRACE_H_

#define SRC_NODE_DTRACE_H_

#include "node.h"

#include "v8.h"

#include "env.h"

extern "C" {

* The following structures are passed directly to DTrace when probes are fired.

* Translators in node.d translate these structures into the corresponding D

* structures, taking care of dealing with the user process data model (32-bit

* or 64-bit) and structure versions (see node_dtrace_http_server_request_t

* below).

typedef struct {

int32_t fd;

int32_t port;

char* remote;

int32_t buffered;

} node_dtrace_connection_t;

typedef struct {

char* url;

char* method;

} node_dtrace_http_client_request_t;

* The original version of this structure contained only a url and method, just

* like the client request above. To add the new forwardedFor field, the

* structure layout was changed to begin with an integer version. The

* translator knows whether it's looking at an old- or new-version structure

* based on whether the version field's value is a reasonable pointer (i.e.

* address greater than 4K). No doubt this is filthy, but there's not much else

* we can do, and it works reliably.

* This version of the structure also contains padding that should be zeroed out

* by the consumer so that future versions of the translator can simply check if

* a field is present by checking it against nullptr.

typedef struct {

union {

uint32_t version;

uintptr_t unused; /* for compat. with old 64-bit struct */

} _un;

char* url;

char* method;

char* forwardedFor;

char* _pad[8];

} node_dtrace_http_server_request_t;

} // extern "C"

namespace node {

void InitDTrace(Environment* env, v8::Local<v8::Object> target);

} // namespace node

#endif // SRC_NODE_DTRACE_H_

node/src/node_dtrace.h at master · greenjava/node · GitHub

Expand file tree

Breadcrumbs

node_dtrace.h

Latest commit

History

Breadcrumbs

node_dtrace.h

File metadata and controls