-
Notifications
You must be signed in to change notification settings - Fork 29.8k
New issue
Have a question about this project? Sign up for a free GitHub account to open an issue and contact its maintainers and the community.
By clicking “Sign up for GitHub”, you agree to our terms of service and privacy statement. We’ll occasionally send you account related emails.
Already on GitHub? Sign in to your account
src, test: node internals' postmortem metadata #14901
Conversation
src/env.cc
Outdated
@@ -23,6 +24,8 @@ using v8::Message; | |||
using v8::StackFrame; | |||
using v8::StackTrace; | |||
|
|||
Environment *Environment::currentEnvironment; |
There was a problem hiding this comment.
Choose a reason for hiding this comment
The reason will be displayed to describe this comment to others. Learn more.
style nit: align the *
to the left (i.e. Environment* Environment::currentEnvironment
)
src/env.h
Outdated
@@ -360,6 +360,7 @@ class IsolateData { | |||
|
|||
class Environment { | |||
public: | |||
static Environment *currentEnvironment; |
There was a problem hiding this comment.
Choose a reason for hiding this comment
The reason will be displayed to describe this comment to others. Learn more.
(ditto)
tools/gen-postmortem-metadata.py
Outdated
name="currentEnvironment", | ||
value="(uint64_t) &Environment::currentEnvironment", | ||
headers=["env.h"], | ||
type_="uint64_t", |
There was a problem hiding this comment.
Choose a reason for hiding this comment
The reason will be displayed to describe this comment to others. Learn more.
uintptr_t?
tools/gen-postmortem-metadata.py
Outdated
type_="uint64_t", | ||
), | ||
DebugSymbol( | ||
name="class__BaseObject__persistant_handle", |
There was a problem hiding this comment.
Choose a reason for hiding this comment
The reason will be displayed to describe this comment to others. Learn more.
typo: persistant
common.gypi
Outdated
@@ -50,6 +50,7 @@ | |||
}, { | |||
'os_posix': 1, | |||
'v8_postmortem_support%': 'true', | |||
'node_postmortem_support%': 'true', |
There was a problem hiding this comment.
Choose a reason for hiding this comment
The reason will be displayed to describe this comment to others. Learn more.
What’s the motivation for making this optional?
src/req-wrap.h
Outdated
@@ -19,6 +19,10 @@ class ReqWrap : public AsyncWrap { | |||
inline ~ReqWrap() override; | |||
inline void Dispatched(); // Call this after the req has been dispatched. | |||
T* req() { return &req_; } | |||
#ifdef NODE_POSTMORTEM_SUPPORT |
There was a problem hiding this comment.
Choose a reason for hiding this comment
The reason will be displayed to describe this comment to others. Learn more.
I don’t think these guards are necessary either way.
tools/gen-postmortem-metadata.py
Outdated
), | ||
DebugSymbol( | ||
name="class__Environment__handleWrapQueue", | ||
value="(size_t) (((Environment*)0)->handle_wrap_queue())", |
There was a problem hiding this comment.
Choose a reason for hiding this comment
The reason will be displayed to describe this comment to others. Learn more.
Tbh, I’d just put #define private public
at the top of the generated file and use offsetof
.
Added two new commands (getactivehandles and getactiverequests) which prints all pending handles and requests (same return given by process._getActiveHandles() and process._getActiveRequests()). Those changes were built upon the symbols added on nodejs/node#14901, which means it's currently not working with node's latest build. Fixes: nodejs#100 Ref: nodejs/node#14901
The changes to src/ seem rather ad hoc. I'm also not a fan of adding global variables. You don't need to because the env can be found by following |
Thanks for the feedbacks, I just updated the PR with the suggestions made by @addaleax. I'm just not sure if All changes previously made on |
node.gyp
Outdated
@@ -152,7 +152,8 @@ | |||
|
|||
'dependencies': [ | |||
'node_js2c#host', | |||
'deps/nghttp2/nghttp2.gyp:nghttp2' | |||
'deps/nghttp2/nghttp2.gyp:nghttp2', | |||
'node-postmortem-metadata' |
There was a problem hiding this comment.
Choose a reason for hiding this comment
The reason will be displayed to describe this comment to others. Learn more.
Is this the right place to include node-postmortem-metadata
as a dependency?
There was a problem hiding this comment.
Choose a reason for hiding this comment
The reason will be displayed to describe this comment to others. Learn more.
Seems fine to me but you should add a #host
at the end. For consistency, I'd name it node_postmortem_metadata
, i.e., underscores instead of dashes.
There was a problem hiding this comment.
Choose a reason for hiding this comment
The reason will be displayed to describe this comment to others. Learn more.
I'll make those changes. Should I also rename gen-postmortem-metadata.py
to gen_postmortem_metadata.py
(most files on tools/
are using dashes, but there are some files using underscores)?
src/env.cc
Outdated
@@ -23,6 +24,8 @@ using v8::Message; | |||
using v8::StackFrame; | |||
using v8::StackTrace; | |||
|
|||
Environment* Environment::currentEnvironment; |
There was a problem hiding this comment.
Choose a reason for hiding this comment
The reason will be displayed to describe this comment to others. Learn more.
This will be changed in the next update to this PR
tools/gen-postmortem-metadata.py
Outdated
*/ | ||
|
||
#define private public | ||
#define protected public |
There was a problem hiding this comment.
Choose a reason for hiding this comment
The reason will be displayed to describe this comment to others. Learn more.
Is it safe to be used here?
There was a problem hiding this comment.
Choose a reason for hiding this comment
The reason will be displayed to describe this comment to others. Learn more.
Seems fine to me.
@bnoordhuis @mmarchini the isolate is a v8 class, the env is in node, and it looks to me that you could get the isolate from the env, but I don't see how you can go the other way? |
@rnchamberlain the Environment is stored in a fixed position inside the Context, and the Context is reachable from the Isolate, but the offsets to get the Context from the Isolate and the position inside the Context where the Environment is stored are currently not available in the symbols table of V8. I'm writing a PR to add those symbols to V8, let's see how it goes. Another option would be to get the environment from |
Pull Request updated:
Please let me know if there's any other changes needed. |
@nodejs/build @nodejs/post-mortem PTAL |
Again @nodejs/build @nodejs/post-mortem PTAL |
The code LGTM but I don’t think I have a sufficiently good feeling for the usefulness of this feature. |
node.gyp
Outdated
@@ -152,7 +152,8 @@ | |||
|
|||
'dependencies': [ | |||
'node_js2c#host', | |||
'deps/nghttp2/nghttp2.gyp:nghttp2' | |||
'deps/nghttp2/nghttp2.gyp:nghttp2', | |||
'node-postmortem-metadata' |
There was a problem hiding this comment.
Choose a reason for hiding this comment
The reason will be displayed to describe this comment to others. Learn more.
Seems fine to me but you should add a #host
at the end. For consistency, I'd name it node_postmortem_metadata
, i.e., underscores instead of dashes.
node.gyp
Outdated
'variables': {}, | ||
'actions': [ | ||
{ | ||
'action_name': 'gen-postmortem-metadata', |
There was a problem hiding this comment.
Choose a reason for hiding this comment
The reason will be displayed to describe this comment to others. Learn more.
Can you add 'process_outputs_as_sources': 1,
here?
tools/gen-postmortem-metadata.py
Outdated
|
||
class DebugSymbol(object): | ||
type_ = 'int' | ||
_PREFIX = 'nodedbg_' |
There was a problem hiding this comment.
Choose a reason for hiding this comment
The reason will be displayed to describe this comment to others. Learn more.
Inconsistent casing of class variables.
tools/gen-postmortem-metadata.py
Outdated
self.name = name | ||
self.value = value | ||
self.headers = headers | ||
self.type_ = type_ or DebugSymbol.type_ |
There was a problem hiding this comment.
Choose a reason for hiding this comment
The reason will be displayed to describe this comment to others. Learn more.
Why is this called type_
instead of type
?
There was a problem hiding this comment.
Choose a reason for hiding this comment
The reason will be displayed to describe this comment to others. Learn more.
There's a built-in function named type
, so using it as a name for variables or attributes is usually discouraged, but I could rename that if you prefer.
tools/gen-postmortem-metadata.py
Outdated
headers = [debug_symbol.headers for debug_symbol in debug_symbols] | ||
headers = sum(headers, []) | ||
|
||
return [h for h in headers if not (h in seen or seen_add(h))] |
There was a problem hiding this comment.
Choose a reason for hiding this comment
The reason will be displayed to describe this comment to others. Learn more.
This seems like a convoluted way of doing:
headers = set()
for d in debug_symbols:
headers.update(d.headers)
return list(headers)
Or even just:
return list(set(sum(d.headers for d in debug_symbols, [])))
There was a problem hiding this comment.
Choose a reason for hiding this comment
The reason will be displayed to describe this comment to others. Learn more.
I prefer these ways too, but the order the headers were declared should be preserved (some headers need to be included before others). I'll add a comment on this method explaining that.
tools/gen-postmortem-metadata.py
Outdated
return [h for h in headers if not (h in seen or seen_add(h))] | ||
|
||
def __str__(self): | ||
return "{type} {prefix}{name} = {value};".format( |
There was a problem hiding this comment.
Choose a reason for hiding this comment
The reason will be displayed to describe this comment to others. Learn more.
Minor nit but we usually use single quotes for strings.
tools/gen-postmortem-metadata.py
Outdated
), | ||
DebugSymbol( | ||
name="class__BaseObject__persistent_handle", | ||
value="(size_t) offsetof(BaseObject, persistent_handle_)", |
There was a problem hiding this comment.
Choose a reason for hiding this comment
The reason will be displayed to describe this comment to others. Learn more.
Unnecessary cast here and elsewhere: the return type of offsetof()
is already size_t
.
tools/gen-postmortem-metadata.py
Outdated
)) | ||
|
||
|
||
if (len(sys.argv) < 2): |
There was a problem hiding this comment.
Choose a reason for hiding this comment
The reason will be displayed to describe this comment to others. Learn more.
Superfluous parens.
tools/gen-postmortem-metadata.py
Outdated
|
||
|
||
if (len(sys.argv) < 2): | ||
print('usage: %s output.cc' % sys.argv[0]) |
There was a problem hiding this comment.
Choose a reason for hiding this comment
The reason will be displayed to describe this comment to others. Learn more.
Can you use .format()
here?
tools/gen-postmortem-metadata.py
Outdated
*/ | ||
|
||
#define private public | ||
#define protected public |
There was a problem hiding this comment.
Choose a reason for hiding this comment
The reason will be displayed to describe this comment to others. Learn more.
Seems fine to me.
Ping @mmarchini |
8416bc4
to
dc9633f
Compare
Sorry for the late response. I've just updated the PR with changes requested by @bnoordhuis. I've also rebased it to match the current master. @addaleax for now, it can be used to inspect active handles and requests on debuggers like LLDB (nodejs/llnode#122) and MDB (not implemented yet, but certainly will be if this is accepted). As we were discussing in nodejs/post-mortem#46, this is a first step to increase the power of debuggers to do post-mortem analysis of Node applications. |
There was a problem hiding this comment.
Choose a reason for hiding this comment
The reason will be displayed to describe this comment to others. Learn more.
LGTM once @bnoordhuis is good with it.
There was a problem hiding this comment.
Choose a reason for hiding this comment
The reason will be displayed to describe this comment to others. Learn more.
LGTM if the last nits are addressed. Thanks for the PR.
node.gyp
Outdated
@@ -169,7 +169,8 @@ | |||
|
|||
'dependencies': [ | |||
'node_js2c#host', | |||
'deps/nghttp2/nghttp2.gyp:nghttp2' | |||
'deps/nghttp2/nghttp2.gyp:nghttp2', | |||
'node_postmortem_metadata#host' |
There was a problem hiding this comment.
Choose a reason for hiding this comment
The reason will be displayed to describe this comment to others. Learn more.
If you swap these two, you can reduce the diff by one line (because you don't need to append a comma to the nghttp2 dep.)
tools/gen-postmortem-metadata.py
Outdated
@classmethod | ||
def get_headers(cls, debug_symbols): | ||
''' | ||
Return a list of headers without duplicates, preserving the order they were declared |
There was a problem hiding this comment.
Choose a reason for hiding this comment
The reason will be displayed to describe this comment to others. Learn more.
Long line, can you wrap this at 80 columns?
tools/gen-postmortem-metadata.py
Outdated
Return a list of headers without duplicates, preserving the order they were declared | ||
''' | ||
seen = set() | ||
seen_add = seen.add # faster than seen.add on each iteration |
There was a problem hiding this comment.
Choose a reason for hiding this comment
The reason will be displayed to describe this comment to others. Learn more.
It probably makes no measurable difference. I'd simply drop this and use seen.add(h)
below.
tools/gen-postmortem-metadata.py
Outdated
headers = [debug_symbol.headers for debug_symbol in debug_symbols] | ||
headers = sum(headers, []) | ||
|
||
return [h for h in headers if not (h in seen or seen_add(h))] |
There was a problem hiding this comment.
Choose a reason for hiding this comment
The reason will be displayed to describe this comment to others. Learn more.
or seen_add(h)
is a somewhat misleading construct because seen.add(h)
doesn't return anything (well, None
.)
I'd spell it out for clarity:
result = []
for h in headers:
if not h in seen:
seen.add(h)
result.append(h)
return result
tools/gen-postmortem-metadata.py
Outdated
|
||
debug_symbols = [ | ||
DebugSymbol( | ||
name="environment_context_idx_embedder_data", |
There was a problem hiding this comment.
Choose a reason for hiding this comment
The reason will be displayed to describe this comment to others. Learn more.
Single quotes please.
tools/gen-postmortem-metadata.py
Outdated
out = file(sys.argv[1], 'w') | ||
headers = DebugSymbol.get_headers(debug_symbols) | ||
includes = ['#include "{}"'.format(header) for header in headers] | ||
includes = "\n".join(includes) |
There was a problem hiding this comment.
Choose a reason for hiding this comment
The reason will be displayed to describe this comment to others. Learn more.
Likewise.
Pull Request updated with those last changes requested |
@mmarchini the commits should at least partially quashed and it is somewhat difficult for me to describe your changes in a single commit as I do not know what of the commit messages is still relevant and what not. Would you mind to either provide a single commit messages for all commits together or rebase on your own so this can be landed? Thanks a lot in advance! |
28136f3
to
a7dfd9a
Compare
I've squashed all commits into one and updated the commit message to best reflect these changes. If you need anything else please let me know :) |
Rerun the CI as it is very red https://ci.nodejs.org/job/node-test-commit/12650/ |
@mmarchini it seems like there are related failures on the CI. Please have a look. E.g. https://ci.nodejs.org/job/node-test-commit-linux/12698/nodes=centos5-64/console |
Before these changes, only V8 added postmortem metadata to Node's binary, limiting the possibilities for debugger's developers to add some features that rely on investigating Node's internal structures. These changes are first steps towards empowering debug tools to navigate Node's internal structures. One example of what can be achieved with this is shown at nodejs/llnode#122 (a command which prints information about handles and requests on the queue for a core dump file). Node postmortem metadata are prefixed with nodedbg_. This also adds tests to validate if all postmortem metadata are calculated correctly, plus some documentation on what is postmortem metadata and a few care to be taken to avoid breaking it. Ref: nodejs/llnode#122 Ref: nodejs/post-mortem#46 PR-URL: nodejs#14901 Refs: nodejs/post-mortem#46 Reviewed-By: Michael Dawson <michael_dawson@ca.ibm.com> Reviewed-By: Matteo Collina <matteo.collina@gmail.com> Reviewed-By: Ben Noordhuis <info@bnoordhuis.nl> Reviewed-By: Joyee Cheung <joyeec9h3@gmail.com>
Before these changes, only V8 added postmortem metadata to Node's binary, limiting the possibilities for debugger's developers to add some features that rely on investigating Node's internal structures. These changes are first steps towards empowering debug tools to navigate Node's internal structures. One example of what can be achieved with this is shown at nodejs/llnode#122 (a command which prints information about handles and requests on the queue for a core dump file). Node postmortem metadata are prefixed with nodedbg_. This also adds tests to validate if all postmortem metadata are calculated correctly, plus some documentation on what is postmortem metadata and a few care to be taken to avoid breaking it. Ref: nodejs/llnode#122 Ref: nodejs/post-mortem#46 Backport-PR-URL: #18550 PR-URL: #14901 Refs: nodejs/post-mortem#46 Reviewed-By: Michael Dawson <michael_dawson@ca.ibm.com> Reviewed-By: Matteo Collina <matteo.collina@gmail.com> Reviewed-By: Ben Noordhuis <info@bnoordhuis.nl> Reviewed-By: Joyee Cheung <joyeec9h3@gmail.com>
Before these changes, only V8 added postmortem metadata to Node's binary, limiting the possibilities for debugger's developers to add some features that rely on investigating Node's internal structures. These changes are first steps towards empowering debug tools to navigate Node's internal structures. One example of what can be achieved with this is shown at nodejs/llnode#122 (a command which prints information about handles and requests on the queue for a core dump file). Node postmortem metadata are prefixed with nodedbg_. This also adds tests to validate if all postmortem metadata are calculated correctly, plus some documentation on what is postmortem metadata and a few care to be taken to avoid breaking it. Ref: nodejs/llnode#122 Ref: nodejs/post-mortem#46 Backport-PR-URL: #18550 PR-URL: #14901 Refs: nodejs/post-mortem#46 Reviewed-By: Michael Dawson <michael_dawson@ca.ibm.com> Reviewed-By: Matteo Collina <matteo.collina@gmail.com> Reviewed-By: Ben Noordhuis <info@bnoordhuis.nl> Reviewed-By: Joyee Cheung <joyeec9h3@gmail.com>
Notable Changes: * **libuv**: - Updated to libuv 1.19.2 (Colin Ihrig) [#18918](#18918) * **src**: - Add initial support for Node.js-specific post-mortem metadata (Matheus Marchini) [#14901](#14901) * **timers**: - The return value of `setImmediate()` now has `ref()` and `unref()` methods (Anatoli Papirovski) [#18139](#18139) * **util**: - It is now possible to get the name for a numerical platform-specific error code as a string (Joyee Cheung) [#18186](#18186)
Notable Changes: * **libuv**: - Updated to libuv 1.19.2 (Colin Ihrig) [#18918](#18918) * **src**: - Add initial support for Node.js-specific post-mortem metadata (Matheus Marchini) [#14901](#14901) * **timers**: - The return value of `setImmediate()` now has `ref()` and `unref()` methods (Anatoli Papirovski) [#18139](#18139) * **util**: - It is now possible to get the name for a numerical platform-specific error code as a string (Joyee Cheung) [#18186](#18186) PR-URL: #19040 Prepared-By: Anna Henningsen <anna@addaleax.net>
Notable Changes: * **libuv**: - Updated to libuv 1.19.2 (Colin Ihrig) [#18918](#18918) * **src**: - Add initial support for Node.js-specific post-mortem metadata (Matheus Marchini) [#14901](#14901) * **timers**: - The return value of `setImmediate()` now has `ref()` and `unref()` methods (Anatoli Papirovski) [#18139](#18139) * **util**: - It is now possible to get the name for a numerical platform-specific error code as a string (Joyee Cheung) [#18186](#18186) PR-URL: #19040 Prepared-By: Anna Henningsen <anna@addaleax.net>
Before these changes, only V8 added postmortem metadata to Node's binary, limiting the possibilities for debugger's developers to add some features that rely on investigating Node's internal structures. These changes are first steps towards empowering debug tools to navigate Node's internal structures. One example of what can be achieved with this is shown at nodejs/llnode#122 (a command which prints information about handles and requests on the queue for a core dump file). Node postmortem metadata are prefixed with nodedbg_. This also adds tests to validate if all postmortem metadata are calculated correctly, plus some documentation on what is postmortem metadata and a few care to be taken to avoid breaking it. Ref: nodejs/llnode#122 Ref: nodejs/post-mortem#46 PR-URL: nodejs#14901 Refs: nodejs/post-mortem#46 Reviewed-By: Michael Dawson <michael_dawson@ca.ibm.com> Reviewed-By: Matteo Collina <matteo.collina@gmail.com> Reviewed-By: Ben Noordhuis <info@bnoordhuis.nl> Reviewed-By: Joyee Cheung <joyeec9h3@gmail.com>
Before these changes, only V8 added postmortem metadata to Node's binary, limiting the possibilities for debugger's developers to add some features that rely on investigating Node's internal structures. These changes are first steps towards empowering debug tools to navigate Node's internal structures. One example of what can be achieved with this is shown at nodejs/llnode#122 (a command which prints information about handles and requests on the queue for a core dump file). Node postmortem metadata are prefixed with nodedbg_. This also adds tests to validate if all postmortem metadata are calculated correctly, plus some documentation on what is postmortem metadata and a few care to be taken to avoid breaking it. Ref: nodejs/llnode#122 Ref: nodejs/post-mortem#46 PR-URL: nodejs#14901 Refs: nodejs/post-mortem#46 Reviewed-By: Michael Dawson <michael_dawson@ca.ibm.com> Reviewed-By: Matteo Collina <matteo.collina@gmail.com> Reviewed-By: Ben Noordhuis <info@bnoordhuis.nl> Reviewed-By: Joyee Cheung <joyeec9h3@gmail.com>
Added two new commands (getactivehandles and getactiverequests) which prints all pending handles and requests (same return given by process._getActiveHandles() and process._getActiveRequests()). Those changes were built upon the symbols added on nodejs/node#14901, which means it's currently not working with node's latest build. Fixes: nodejs#100 Ref: nodejs/node#14901
Before these changes, only V8 added postmortem metadata to Node's binary, limiting the possibilities for debugger's developers to add some features that rely on investigating Node's internal structures. These changes are first steps towards empowering debug tools to navigate Node's internal structures. One example of what can be achieved with this is shown at nodejs/llnode#122 (a command which prints information about handles and requests on the queue for a core dump file). Node postmortem metadata are prefixed with nodedbg_. This also adds tests to validate if all postmortem metadata are calculated correctly, plus some documentation on what is postmortem metadata and a few care to be taken to avoid breaking it. Ref: nodejs/llnode#122 Ref: nodejs/post-mortem#46 PR-URL: nodejs#14901 Refs: nodejs/post-mortem#46 Reviewed-By: Michael Dawson <michael_dawson@ca.ibm.com> Reviewed-By: Matteo Collina <matteo.collina@gmail.com> Reviewed-By: Ben Noordhuis <info@bnoordhuis.nl> Reviewed-By: Joyee Cheung <joyeec9h3@gmail.com>
Notable Changes: * **libuv**: - Updated to libuv 1.19.2 (Colin Ihrig) [nodejs#18918](nodejs#18918) * **src**: - Add initial support for Node.js-specific post-mortem metadata (Matheus Marchini) [nodejs#14901](nodejs#14901) * **timers**: - The return value of `setImmediate()` now has `ref()` and `unref()` methods (Anatoli Papirovski) [nodejs#18139](nodejs#18139) * **util**: - It is now possible to get the name for a numerical platform-specific error code as a string (Joyee Cheung) [nodejs#18186](nodejs#18186) PR-URL: nodejs#19040 Prepared-By: Anna Henningsen <anna@addaleax.net>
Yes. There's already a backport PR open (#19176), I just need to rebase it to resolve conflicts. I'll do it today. |
Before these changes, only V8 added postmortem metadata to Node's binary, limiting the possibilities for debugger's developers to add some features that rely on investigating Node's internal structures. These changes are first steps towards empowering debug tools to navigate Node's internal structures. One example of what can be achieved with this is shown at nodejs/llnode#122 (a command which prints information about handles and requests on the queue for a core dump file). Node postmortem metadata are prefixed with nodedbg_. This also adds tests to validate if all postmortem metadata are calculated correctly, plus some documentation on what is postmortem metadata and a few care to be taken to avoid breaking it. Ref: nodejs/llnode#122 Ref: nodejs/post-mortem#46 PR-URL: #14901 Refs: nodejs/post-mortem#46 Reviewed-By: Michael Dawson <michael_dawson@ca.ibm.com> Reviewed-By: Matteo Collina <matteo.collina@gmail.com> Reviewed-By: Ben Noordhuis <info@bnoordhuis.nl> Reviewed-By: Joyee Cheung <joyeec9h3@gmail.com>
Before these changes, only V8 added postmortem metadata to Node's binary, limiting the possibilities for debugger's developers to add some features that rely on investigating Node's internal structures. These changes are first steps towards empowering debug tools to navigate Node's internal structures. One example of what can be achieved with this is shown at nodejs/llnode#122 (a command which prints information about handles and requests on the queue for a core dump file). Node postmortem metadata are prefixed with nodedbg_. This also adds tests to validate if all postmortem metadata are calculated correctly, plus some documentation on what is postmortem metadata and a few care to be taken to avoid breaking it. Ref: nodejs/llnode#122 Ref: nodejs/post-mortem#46 Backport-PR-URL: #19176 PR-URL: #14901 Refs: nodejs/post-mortem#46 Reviewed-By: Michael Dawson <michael_dawson@ca.ibm.com> Reviewed-By: Matteo Collina <matteo.collina@gmail.com> Reviewed-By: Ben Noordhuis <info@bnoordhuis.nl> Reviewed-By: Joyee Cheung <joyeec9h3@gmail.com>
Before these changes, only V8 added postmortem metadata to Node's binary, limiting the possibilities for debugger's developers to add some features that rely on investigating Node's internal structures. These changes are first steps towards empowering debug tools to navigate Node's internal structures. One example of what can be achieved with this is shown at nodejs/llnode#122 (a command which prints information about handles and requests on the queue for a core dump file). Node postmortem metadata are prefixed with nodedbg_. This also adds tests to validate if all postmortem metadata are calculated correctly, plus some documentation on what is postmortem metadata and a few care to be taken to avoid breaking it. Ref: nodejs/llnode#122 Ref: nodejs/post-mortem#46 Backport-PR-URL: #19176 PR-URL: #14901 Refs: nodejs/post-mortem#46 Reviewed-By: Michael Dawson <michael_dawson@ca.ibm.com> Reviewed-By: Matteo Collina <matteo.collina@gmail.com> Reviewed-By: Ben Noordhuis <info@bnoordhuis.nl> Reviewed-By: Joyee Cheung <joyeec9h3@gmail.com>
Before these changes, only V8 added postmortem metadata to Node's binary, limiting the possibilities for debugger's developers to add some features that rely on investigating Node's internal structures. These changes are first steps towards empowering debug tools to navigate Node's internal structures. One example of what can be achieved with this is shown at nodejs/llnode#122 (a command which prints information about handles and requests on the queue for a core dump file). Node postmortem metadata are prefixed with nodedbg_. This also adds tests to validate if all postmortem metadata are calculated correctly, plus some documentation on what is postmortem metadata and a few care to be taken to avoid breaking it. Ref: nodejs/llnode#122 Ref: nodejs/post-mortem#46 Backport-PR-URL: #19176 PR-URL: #14901 Refs: nodejs/post-mortem#46 Reviewed-By: Michael Dawson <michael_dawson@ca.ibm.com> Reviewed-By: Matteo Collina <matteo.collina@gmail.com> Reviewed-By: Ben Noordhuis <info@bnoordhuis.nl> Reviewed-By: Joyee Cheung <joyeec9h3@gmail.com>
Notable Changes: * async_hooks: - rename PromiseWrap.parentId (Ali Ijaz Sheikh) #18633 - remove runtime deprecation (Ali Ijaz Sheikh) #19517 - deprecate unsafe emit{Before,After} (Ali Ijaz Sheikh) #18513 * cluster: - add cwd to cluster.settings (cjihrig) #18399 - support windowsHide option for workers (Todd Wong) #17412 * crypto: - allow passing null as IV unless required (Tobias Nießen) #18644 * deps: - upgrade npm to 6.2.0 (Kat Marchán) #21592 - upgrade libuv to 1.19.2 (cjihrig) #18918 - Upgrade node-inspect to 1.11.5 (Jan Krems) #21055 * fs,net: - support as and as+ flags in stringToFlags() (Sarat Addepalli) #18801 - emit 'ready' for fs streams and sockets (Sameer Srivastava) #19408 * http, http2: - add options to http.createServer() (Peter Marton) #15752 - add 103 Early Hints status code (Yosuke Furukawa) #16644 - add http fallback options to .createServer (Peter Marton) #15752 * n-api: - take n-api out of experimental (Michael Dawson) #19262 * perf_hooks: - add warning when too many entries in the timeline (James M Snell) #18087 * src: - add public API for managing NodePlatform (Cheng Zhao) #16981 - allow --perf-(basic-)?prof in NODE\_OPTIONS (Leko) #17600 - node internals' postmortem metadata (Matheus Marchini) #14901 * tls: - expose Finished messages in TLSSocket (Anton Salikhmetov) #19102 * **trace_events**: - add file pattern cli option (Andreas Madsen) #18480 * util: - implement util.getSystemErrorName() (Joyee Cheung) #18186 PR-URL: #21593
Notable Changes: * async_hooks: - rename PromiseWrap.parentId (Ali Ijaz Sheikh) nodejs#18633 - remove runtime deprecation (Ali Ijaz Sheikh) nodejs#19517 - deprecate unsafe emit{Before,After} (Ali Ijaz Sheikh) nodejs#18513 * cluster: - add cwd to cluster.settings (cjihrig) nodejs#18399 - support windowsHide option for workers (Todd Wong) nodejs#17412 * crypto: - allow passing null as IV unless required (Tobias Nießen) nodejs#18644 * deps: - upgrade npm to 6.2.0 (Kat Marchán) nodejs#21592 - upgrade libuv to 1.19.2 (cjihrig) nodejs#18918 - Upgrade node-inspect to 1.11.5 (Jan Krems) nodejs#21055 * fs,net: - support as and as+ flags in stringToFlags() (Sarat Addepalli) nodejs#18801 - emit 'ready' for fs streams and sockets (Sameer Srivastava) nodejs#19408 * http, http2: - add options to http.createServer() (Peter Marton) nodejs#15752 - add 103 Early Hints status code (Yosuke Furukawa) nodejs#16644 - add http fallback options to .createServer (Peter Marton) nodejs#15752 * n-api: - take n-api out of experimental (Michael Dawson) nodejs#19262 * perf_hooks: - add warning when too many entries in the timeline (James M Snell) nodejs#18087 * src: - add public API for managing NodePlatform (Cheng Zhao) nodejs#16981 - allow --perf-(basic-)?prof in NODE\_OPTIONS (Leko) nodejs#17600 - node internals' postmortem metadata (Matheus Marchini) nodejs#14901 * tls: - expose Finished messages in TLSSocket (Anton Salikhmetov) nodejs#19102 * **trace_events**: - add file pattern cli option (Andreas Madsen) nodejs#18480 * util: - implement util.getSystemErrorName() (Joyee Cheung) nodejs#18186 PR-URL: nodejs#21593
Notable Changes: * async_hooks: - rename PromiseWrap.parentId (Ali Ijaz Sheikh) #18633 - remove runtime deprecation (Ali Ijaz Sheikh) #19517 - deprecate unsafe emit{Before,After} (Ali Ijaz Sheikh) #18513 * cluster: - add cwd to cluster.settings (cjihrig) #18399 - support windowsHide option for workers (Todd Wong) #17412 * crypto: - allow passing null as IV unless required (Tobias Nießen) #18644 * deps: - upgrade npm to 6.4.1 (Kat Marchán) #22591 - upgrade libuv to 1.19.2 (cjihrig) #18918 - Upgrade node-inspect to 1.11.5 (Jan Krems) #21055 * fs,net: - support as and as+ flags in stringToFlags() (Sarat Addepalli) #18801 - emit 'ready' for fs streams and sockets (Sameer Srivastava) #19408 * http, http2: - add options to http.createServer() (Peter Marton) #15752 - add 103 Early Hints status code (Yosuke Furukawa) #16644 - add http fallback options to .createServer (Peter Marton) #15752 * n-api: - take n-api out of experimental (Michael Dawson) #19262 * perf_hooks: - add warning when too many entries in the timeline (James M Snell) #18087 * src: - add public API for managing NodePlatform (Cheng Zhao) #16981 - allow --perf-(basic-)?prof in NODE\_OPTIONS (Leko) #17600 - node internals' postmortem metadata (Matheus Marchini) #14901 * tls: - expose Finished messages in TLSSocket (Anton Salikhmetov) #19102 * **trace_events**: - add file pattern cli option (Andreas Madsen) #18480 * util: - implement util.getSystemErrorName() (Joyee Cheung) #18186 PR-URL: #21593
Notable Changes: * async_hooks: - rename PromiseWrap.parentId (Ali Ijaz Sheikh) #18633 - remove runtime deprecation (Ali Ijaz Sheikh) #19517 - deprecate unsafe emit{Before,After} (Ali Ijaz Sheikh) #18513 * cluster: - add cwd to cluster.settings (cjihrig) #18399 - support windowsHide option for workers (Todd Wong) #17412 * crypto: - allow passing null as IV unless required (Tobias Nießen) #18644 * deps: - upgrade npm to 6.2.0 (Kat Marchán) #21592 - upgrade libuv to 1.19.2 (cjihrig) #18918 - Upgrade node-inspect to 1.11.5 (Jan Krems) #21055 * fs,net: - support as and as+ flags in stringToFlags() (Sarat Addepalli) #18801 - emit 'ready' for fs streams and sockets (Sameer Srivastava) #19408 * http, http2: - add options to http.createServer() (Peter Marton) #15752 - add 103 Early Hints status code (Yosuke Furukawa) #16644 - add http fallback options to .createServer (Peter Marton) #15752 * n-api: - take n-api out of experimental (Michael Dawson) #19262 * perf_hooks: - add warning when too many entries in the timeline (James M Snell) #18087 * src: - add public API for managing NodePlatform (Cheng Zhao) #16981 - allow --perf-(basic-)?prof in NODE\_OPTIONS (Leko) #17600 - node internals' postmortem metadata (Matheus Marchini) #14901 * tls: - expose Finished messages in TLSSocket (Anton Salikhmetov) #19102 * **trace_events**: - add file pattern cli option (Andreas Madsen) #18480 * util: - implement util.getSystemErrorName() (Joyee Cheung) #18186 PR-URL: #21593
Notable Changes: * async_hooks: - rename PromiseWrap.parentId (Ali Ijaz Sheikh) #18633 - remove runtime deprecation (Ali Ijaz Sheikh) #19517 - deprecate unsafe emit{Before,After} (Ali Ijaz Sheikh) #18513 * cluster: - add cwd to cluster.settings (cjihrig) #18399 - support windowsHide option for workers (Todd Wong) #17412 * crypto: - allow passing null as IV unless required (Tobias Nießen) #18644 * deps: - upgrade npm to 6.2.0 (Kat Marchán) #21592 - upgrade libuv to 1.19.2 (cjihrig) #18918 - Upgrade node-inspect to 1.11.5 (Jan Krems) #21055 * fs,net: - support as and as+ flags in stringToFlags() (Sarat Addepalli) #18801 - emit 'ready' for fs streams and sockets (Sameer Srivastava) #19408 * http, http2: - add options to http.createServer() (Peter Marton) #15752 - add 103 Early Hints status code (Yosuke Furukawa) #16644 - add http fallback options to .createServer (Peter Marton) #15752 * n-api: - take n-api out of experimental (Michael Dawson) #19262 * perf_hooks: - add warning when too many entries in the timeline (James M Snell) #18087 * src: - add public API for managing NodePlatform (Cheng Zhao) #16981 - allow --perf-(basic-)?prof in NODE\_OPTIONS (Leko) #17600 - node internals' postmortem metadata (Matheus Marchini) #14901 * tls: - expose Finished messages in TLSSocket (Anton Salikhmetov) #19102 * **trace_events**: - add file pattern cli option (Andreas Madsen) #18480 * util: - implement util.getSystemErrorName() (Joyee Cheung) #18186 PR-URL: #21593
Notable Changes: * async_hooks: - rename PromiseWrap.parentId (Ali Ijaz Sheikh) #18633 - remove runtime deprecation (Ali Ijaz Sheikh) #19517 - deprecate unsafe emit{Before,After} (Ali Ijaz Sheikh) #18513 * cluster: - add cwd to cluster.settings (cjihrig) #18399 - support windowsHide option for workers (Todd Wong) #17412 * crypto: - allow passing null as IV unless required (Tobias Nießen) #18644 * deps: - upgrade npm to 6.2.0 (Kat Marchán) #21592 - upgrade libuv to 1.19.2 (cjihrig) #18918 - Upgrade node-inspect to 1.11.5 (Jan Krems) #21055 * fs,net: - support as and as+ flags in stringToFlags() (Sarat Addepalli) #18801 - emit 'ready' for fs streams and sockets (Sameer Srivastava) #19408 * http, http2: - add options to http.createServer() (Peter Marton) #15752 - add 103 Early Hints status code (Yosuke Furukawa) #16644 - add http fallback options to .createServer (Peter Marton) #15752 * n-api: - take n-api out of experimental (Michael Dawson) #19262 * perf_hooks: - add warning when too many entries in the timeline (James M Snell) #18087 * src: - add public API for managing NodePlatform (Cheng Zhao) #16981 - allow --perf-(basic-)?prof in NODE\_OPTIONS (Leko) #17600 - node internals' postmortem metadata (Matheus Marchini) #14901 * tls: - expose Finished messages in TLSSocket (Anton Salikhmetov) #19102 * **trace_events**: - add file pattern cli option (Andreas Madsen) #18480 * util: - implement util.getSystemErrorName() (Joyee Cheung) #18186 PR-URL: #21593
Those changes are the first steps towards allowing debug tools to
navigate some of Node's internals strucutres, giving more possibilities
to developers doing post-mortem debugging. One example of what can be
achieved with the symbols added is a new command being developed for
llnode, which prints information about handles and requests on the
queue for a core dump file.
Ref: nodejs/post-mortem#46
Obs.: To add good tests for those changes, something like nodejs/build#777 is needed.
Checklist
make -j4 test
(UNIX), orvcbuild test
(Windows) passesAffected core subsystem(s)