lukechilds
/
node
mirror of https://github.com/lukechilds/node.git
1
0
Fork 0
Code Issues Projects Releases Wiki Activity
Browse Source

windows: generate ETW events to track v8 compiled code positions 

Patch by Henry Rawas and Scott Blomquist.
v0.9.4-release
Scott Blomquist 12 years ago
committed by Bert Belder
parent
2f5fa089e9
commit
66f64ae072
4 changed files with 306 additions and 13 deletions
Whitespace
Show all changes Ignore whitespace when comparing lines Ignore changes in amount of whitespace Ignore changes in whitespace at EOL
Split View
Diff Options
Show Stats Download Patch File Download Diff File
  1. 120
      src/node_win32_etw_provider-inl.h
  2. 114
      src/node_win32_etw_provider.cc
  3. 8
      src/node_win32_etw_provider.h
  4. 51
      src/res/node_etw_provider.man

120
src/node_win32_etw_provider-inl.h
View File

@ -42,6 +42,20 @@ extern int events_enabled;
#define ETW_WRITE_INT32_DATA(data_descriptor, data) \
EventDataDescCreate(data_descriptor, data, sizeof(int32_t));
#define ETW_WRITE_INT64_DATA(data_descriptor, data) \
EventDataDescCreate(data_descriptor, data, sizeof(int64_t));
#define ETW_WRITE_ADDRESS_DATA(data_descriptor, data) \
EventDataDescCreate(data_descriptor, data, sizeof(intptr_t));
#define ETW_WRITE_INT16_DATA(data_descriptor, data) \
EventDataDescCreate(data_descriptor, data, sizeof(int16_t));
#define ETW_WRITE_WSTRING_DATA_LENGTH(data_descriptor, data, data_len_bytes) \
EventDataDescCreate(data_descriptor, \
data, \
data_len_bytes);
#define ETW_WRITE_NET_CONNECTION(descriptors, conn) \
ETW_WRITE_INT32_DATA(descriptors, &conn->fd); \
ETW_WRITE_INT32_DATA(descriptors + 1, &conn->port); \
@ -61,6 +75,34 @@ extern int events_enabled;
ETW_WRITE_INT32_DATA(descriptors, &type); \
ETW_WRITE_INT32_DATA(descriptors + 1, &flags);
#define ETW_WRITE_V8ADDRESSCHANGE(descriptors, addr1, addr2) \
ETW_WRITE_ADDRESS_DATA(descriptors, &addr1); \
ETW_WRITE_ADDRESS_DATA(descriptors + 1, &addr2);
#define ETW_WRITE_JSMETHOD_LOADUNLOAD(descriptors, \
context, \
startAddr, \
size, \
id, \
flags, \
rangeId, \
sourceId, \
line, \
col, \
name, \
name_len_bytes) \
ETW_WRITE_ADDRESS_DATA(descriptors, &context); \
ETW_WRITE_ADDRESS_DATA(descriptors + 1, &startAddr); \
ETW_WRITE_INT64_DATA(descriptors + 2, &size); \
ETW_WRITE_INT32_DATA(descriptors + 3, &id); \
ETW_WRITE_INT16_DATA(descriptors + 4, &flags); \
ETW_WRITE_INT16_DATA(descriptors + 5, &rangeId); \
ETW_WRITE_INT64_DATA(descriptors + 6, &sourceId); \
ETW_WRITE_INT32_DATA(descriptors + 7, &line); \
ETW_WRITE_INT32_DATA(descriptors + 8, &col); \
ETW_WRITE_WSTRING_DATA_LENGTH(descriptors + 9, name, name_len_bytes);
#define ETW_WRITE_EVENT(eventDescriptor, dataDescriptors) \
DWORD status = event_write(node_provider, \
&eventDescriptor, \
@ -133,6 +175,83 @@ void NODE_GC_DONE(GCType type, GCCallbackFlags flags) {
}
void NODE_V8SYMBOL_REMOVE(const void* addr1, const void* addr2) {
if (events_enabled > 0) {
EVENT_DATA_DESCRIPTOR descriptors[2];
ETW_WRITE_V8ADDRESSCHANGE(descriptors, addr1, addr2);
ETW_WRITE_EVENT(NODE_V8SYMBOL_REMOVE_EVENT, descriptors);
}
}
void NODE_V8SYMBOL_MOVE(const void* addr1, const void* addr2) {
if (events_enabled > 0) {
EVENT_DATA_DESCRIPTOR descriptors[2];
ETW_WRITE_V8ADDRESSCHANGE(descriptors, addr1, addr2);
ETW_WRITE_EVENT(NODE_V8SYMBOL_MOVE_EVENT, descriptors);
}
}
void NODE_V8SYMBOL_RESET() {
if (events_enabled > 0) {
int val = 0;
EVENT_DATA_DESCRIPTOR descriptors[1];
ETW_WRITE_INT32_DATA(descriptors, &val);
ETW_WRITE_EVENT(NODE_V8SYMBOL_RESET_EVENT, descriptors);
}
}
#define SETSYMBUF(s) \
wcscpy(symbuf, s); \
symbol_len = ARRAY_SIZE(s) - 1;
void NODE_V8SYMBOL_ADD(LPCSTR symbol,
int symbol_len,
const void* addr1,
int len) {
if (events_enabled > 0) {
wchar_t symbuf[128];
if (symbol == NULL) {
SETSYMBUF(L"NULL");
} else {
symbol_len = MultiByteToWideChar(CP_ACP, 0, symbol, symbol_len, symbuf, 128);
if (symbol_len == 0) {
SETSYMBUF(L"Invalid");
} else {
if (symbol_len > 127) {
symbol_len = 127;
}
symbuf[symbol_len] = L'\0';
}
}
void* context = NULL;
INT64 size = (INT64)len;
INT32 id = (INT32)addr1;
INT16 flags = 0;
INT16 rangeid = 1;
INT32 col = 1;
INT32 line = 1;
INT64 sourceid = 0;
EVENT_DATA_DESCRIPTOR descriptors[10];
ETW_WRITE_JSMETHOD_LOADUNLOAD(descriptors,
context,
addr1,
size,
id,
flags,
rangeid,
sourceid,
line,
col,
symbuf,
symbol_len * sizeof(symbuf[0]));
ETW_WRITE_EVENT(MethodLoad, descriptors);
}
}
#undef SETSYMBUF
bool NODE_HTTP_SERVER_REQUEST_ENABLED() { return events_enabled > 0; }
bool NODE_HTTP_SERVER_RESPONSE_ENABLED() { return events_enabled > 0; }
bool NODE_HTTP_CLIENT_REQUEST_ENABLED() { return events_enabled > 0; }
@ -141,5 +260,6 @@ bool NODE_NET_SERVER_CONNECTION_ENABLED() { return events_enabled > 0; }
bool NODE_NET_STREAM_END_ENABLED() { return events_enabled > 0; }
bool NODE_NET_SOCKET_READ_ENABLED() { return events_enabled > 0; }
bool NODE_NET_SOCKET_WRITE_ENABLED() { return events_enabled > 0; }
bool NODE_V8SYMBOL_ENABLED() { return events_enabled > 0; }
}
#endif // SRC_ETW_INL_H_

114
src/node_win32_etw_provider.cc
View File

@ -22,6 +22,7 @@
#include "node_dtrace.h"
#include "node_win32_etw_provider.h"
#include "node_etw_provider.h"
#include "node_win32_etw_provider-inl.h"
namespace node {
@ -33,10 +34,110 @@ EventRegisterFunc event_register;
EventUnregisterFunc event_unregister;
EventWriteFunc event_write;
int events_enabled;
static uv_async_t dispatch_etw_events_change_async;
struct v8tags {
char prefix[32 - sizeof(size_t)];
size_t prelen;
};
// The v8 CODE_ADDED event name has a prefix indicating the type of event.
// Many of these are internal to v8.
// The trace_codes array specifies which types are written.
struct v8tags trace_codes[] = {
#define MAKE_V8TAG(s) { s, sizeof(s) - 1 }
MAKE_V8TAG("LazyCompile:"),
MAKE_V8TAG("Script:"),
MAKE_V8TAG("Function:"),
MAKE_V8TAG("RegExp:"),
MAKE_V8TAG("Eval:")
#undef MAKE_V8TAG
};
/* Below are some code prefixes which are not being written.
* "Builtin:"
* "Stub:"
* "CallIC:"
* "LoadIC:"
* "KeyedLoadIC:"
* "StoreIC:"
* "KeyedStoreIC:"
* "CallPreMonomorphic:"
* "CallInitialize:"
* "CallMiss:"
* "CallMegamorphic:"
*/
// v8 sometimes puts a '*' or '~' in front of the name.
#define V8_MARKER1 '*'
#define V8_MARKER2 '~'
// If prefix is not in filtered list return -1,
// else return length of prefix and marker.
int FilterCodeEvents(const char* name, size_t len) {
for (int i = 0; i < ARRAY_SIZE(trace_codes); i++) {
size_t prelen = trace_codes[i].prelen;
if (prelen < len) {
if (strncmp(name, trace_codes[i].prefix, prelen) == 0) {
if (name[prelen] == V8_MARKER1 || name[prelen] == V8_MARKER2)
prelen++;
return prelen;
}
}
}
return -1;
}
// callback from V8 module passes symbol and address info for stack walk
void CodeAddressNotification(const JitCodeEvent* jevent) {
int pre_offset = 0;
if (NODE_V8SYMBOL_ENABLED()) {
switch (jevent->type) {
case JitCodeEvent::CODE_ADDED:
pre_offset = FilterCodeEvents(jevent->name.str, jevent->name.len);
if (pre_offset >= 0) {
// skip over prefix and marker
NODE_V8SYMBOL_ADD(jevent->name.str + pre_offset,
jevent->name.len - pre_offset,
jevent->code_start,
jevent->code_len);
}
break;
case JitCodeEvent::CODE_REMOVED:
NODE_V8SYMBOL_REMOVE(jevent->code_start, 0);
break;
case JitCodeEvent::CODE_MOVED:
NODE_V8SYMBOL_MOVE(jevent->code_start, jevent->new_code_start);
break;
default:
break;
}
}
}
// Call v8 to enable or disable code event callbacks.
// Must be on default thread to do this.
// Note: It is possible to call v8 from ETW thread, but then
// event callbacks are received in the same thread. Attempts
// to write ETW events in this thread will fail.
void etw_events_change_async(uv_async_t* handle, int status) {
if (events_enabled > 0) {
NODE_V8SYMBOL_RESET();
V8::SetJitCodeEventHandler(v8::kJitCodeEventEnumExisting,
CodeAddressNotification);
} else {
V8::SetJitCodeEventHandler(v8::kJitCodeEventDefault, NULL);
}
}
// This callback is called by ETW when consumers of our provider
// are enabled or disabled.
// The callback is dispatched on ETW thread.
// Before calling into V8 to enable code events, switch to default thread.
void NTAPI etw_events_enable_callback(
LPCGUID SourceId,
ULONG IsEnabled,
@ -47,8 +148,14 @@ void NTAPI etw_events_enable_callback(
PVOID CallbackContext) {
if (IsEnabled) {
events_enabled++;
if (events_enabled == 1) {
uv_async_send(&dispatch_etw_events_change_async);
}
} else {
events_enabled--;
if (events_enabled == 0) {
uv_async_send(&dispatch_etw_events_change_async);
}
}
}
@ -64,6 +171,12 @@ void init_etw() {
GetProcAddress(advapi, "EventUnregister");
event_write = (EventWriteFunc)GetProcAddress(advapi, "EventWrite");
// create async object used to invoke main thread from callback
uv_async_init(uv_default_loop(),
&dispatch_etw_events_change_async,
etw_events_change_async);
uv_unref((uv_handle_t*) &dispatch_etw_events_change_async);
if (event_register) {
DWORD status = event_register(&NODE_ETW_PROVIDER,
etw_events_enable_callback,
@ -82,6 +195,7 @@ void shutdown_etw() {
}
events_enabled = 0;
V8::SetJitCodeEventHandler(v8::kJitCodeEventDefault, NULL);
if (advapi) {
FreeLibrary(advapi);

8
src/node_win32_etw_provider.h
View File

@ -66,6 +66,13 @@ INLINE void NODE_NET_SERVER_CONNECTION(node_dtrace_connection_t* conn);
INLINE void NODE_NET_STREAM_END(node_dtrace_connection_t* conn);
INLINE void NODE_GC_START(GCType type, GCCallbackFlags flags);
INLINE void NODE_GC_DONE(GCType type, GCCallbackFlags flags);
INLINE void NODE_V8SYMBOL_REMOVE(const void* addr1, const void* addr2);
INLINE void NODE_V8SYMBOL_MOVE(const void* addr1, const void* addr2);
INLINE void NODE_V8SYMBOL_RESET();
INLINE void NODE_V8SYMBOL_ADD(LPCSTR symbol,
int symbol_len,
const void* addr1,
int len);
INLINE bool NODE_HTTP_SERVER_REQUEST_ENABLED();
INLINE bool NODE_HTTP_SERVER_RESPONSE_ENABLED();
@ -75,6 +82,7 @@ INLINE bool NODE_NET_SERVER_CONNECTION_ENABLED();
INLINE bool NODE_NET_STREAM_END_ENABLED();
INLINE bool NODE_NET_SOCKET_READ_ENABLED();
INLINE bool NODE_NET_SOCKET_WRITE_ENABLED();
INLINE bool NODE_V8SYMBOL_ENABLED();
#define NODE_NET_SOCKET_READ(arg0, arg1)
#define NODE_NET_SOCKET_WRITE(arg0, arg1)

51
src/res/node_etw_provider.man
View File

@ -10,6 +10,16 @@
resourceFileName="node.exe"
messageFileName="node.exe">
<tasks>
<task name="MethodRuntime" value="1"
symbol="JSCRIPT_METHOD_RUNTIME_TASK">
<opcodes>
<opcode name="MethodLoad" value="10"
symbol="JSCRIPT_METHOD_METHODLOAD_OPCODE"/>
</opcodes>
</task>
</tasks>
<opcodes>
<opcode name="NODE_HTTP_SERVER_REQUEST" value="10"/>
<opcode name="NODE_HTTP_SERVER_RESPONSE" value="11"/>
@ -19,6 +29,9 @@
<opcode name="NODE_NET_STREAM_END" value="15"/>
<opcode name="NODE_GC_START" value="16"/>
<opcode name="NODE_GC_DONE" value="17"/>
<opcode name="NODE_V8SYMBOL_REMOVE" value="21"/>
<opcode name="NODE_V8SYMBOL_MOVE" value="22"/>
<opcode name="NODE_V8SYMBOL_RESET" value="23"/>
</opcodes>
<templates>
@ -52,6 +65,24 @@
<data name="gctype" inType="win:UInt32" />
<data name="gccallbackflags" inType="win:UInt32" />
</template>
<template tid="V8AddressChange">
<data name="addr1" inType="win:Pointer" outType="win:HexInt64"/>
<data name="addr2" inType="win:Pointer" outType="win:HexInt64"/>
</template>
<template tid="MethodLoadUnload">
<data name="ScriptContextID" inType="win:Pointer" outType="win:HexInt64"/>
<data name="MethodStartAddress" inType="win:Pointer" outType="win:HexInt64" />
<data name="MethodSize" inType="win:UInt64" />
<data name="MethodID" inType="win:UInt32" />
<data name="MethodFlags" inType="win:UInt16" />
<data name="MethodAddressRangeID" inType="win:UInt16" />
<data name="SourceID" inType="win:UInt64" />
<data name="Line" inType="win:UInt32" outType="xs:unsignedInt" />
<data name="Column" inType="win:UInt32" outType="xs:unsignedInt" />
<data name="MethodName" inType="win:UnicodeString" outType="xs:string" />
</template>
</templates>
<events>
@ -95,6 +126,26 @@
template="node_gc"
symbol="NODE_GC_DONE_EVENT"
level="win:Informational"/>
<event value="9"
level="win:Informational"
opcode="MethodLoad"
symbol="MethodLoad"
task="MethodRuntime"
template="MethodLoadUnload"/>
<event value="21"
opcode="NODE_V8SYMBOL_REMOVE"
template="V8AddressChange"
symbol="NODE_V8SYMBOL_REMOVE_EVENT"
level="win:Informational" />
<event value="22"
opcode="NODE_V8SYMBOL_MOVE"
template="V8AddressChange"
symbol="NODE_V8SYMBOL_MOVE_EVENT"
level="win:Informational" />
<event value="23"
opcode="NODE_V8SYMBOL_RESET"
symbol="NODE_V8SYMBOL_RESET_EVENT"
level="win:Informational" />
</events>
</provider>
</events>

Write Preview
Loading…
Cancel
Save