| #lang racket/base | |
| (define kont #f) | |
| (define my-prompt (make-continuation-prompt-tag)) | |
| (begin | |
| (call-with-continuation-prompt | |
| (λ () | |
| (printf "Before everything~n") | |
| (printf "The call current/composable returned ~v~n" | |
| (call/cc |
| { | |
| inputStream: { | |
| name: "Live", | |
| type: "LiveStream", | |
| constraints: { | |
| width: {min:640}, | |
| height: {min:480}, | |
| facingMode: "environment", | |
| aspectRatio: {min:1,max:2}, | |
| }, |
| #!/bin/bash | |
| # All credit for figuring out these incantations goes to https://utcc.utoronto.ca/~cks/space/blog/linux/CgroupsForMemoryLimiting | |
| # | |
| # Script to run a command in a v1 cgroup limiting CPU and memory. | |
| # Use as `./confine.sh command <other args>`. | |
| # This is tested on Ubuntu Bionic. | |
| # You will need to install the `cgroup-tools` package from `apt` first. | |
| # Remember to tweak the limits based on your machine. | |
| # `sudo` is required to create the cgroup, but the build itself is run as a normal user. |
| import time | |
| import adafruit_ble | |
| from adafruit_ble import BLERadio | |
| from adafruit_ble.advertising import Advertisement | |
| from adafruit_ble.advertising.standard import ProvideServicesAdvertisement | |
| from adafruit_ble.services.standard.device_info import DeviceInfoService | |
| # from adafruit_ble.services.standard.hid import HIDService | |
| from adafruit_circuitplayground import cp |
| [package] | |
| edition = "2018" | |
| name = "hello_world" | |
| version = "0.1.0" | |
| [lib] | |
| crate-type = ["staticlib"] | |
| name = "hello_world" | |
| [dependencies] |
| [package] | |
| name = "testatty" | |
| version = "0.1.0" | |
| authors = ["vagrant"] | |
| edition = "2018" | |
| # See more keys and their definitions at https://doc.rust-lang.org/cargo/reference/manifest.html | |
| [dependencies] | |
| atty = { path= "../atty"} |
When a debugger, profiler or crash reporter is unwinding the call stack, can it reliably retrieve the function arguments of every function in the stack?
I originally intended for this to be a later part of the [Sampling Profilers]({{< ref "/post/2018/sampling-profiler-internals-introduction" >}}) series, but a recent discussion with Ben Frederickson, and his [subsequent py-spy implementation][] helped crystallize my thoughts and I figured I'd write it down separately.
| #!/bin/sh | |
| # #!/usr/bin/sh | |
| # | |
| # opensnoop - snoop file opens as they occur. | |
| # Written using DTrace (Solaris 10 3/05). | |
| # | |
| # 12-Jan-2006, ver 1.60 | |
| # | |
| # USAGE: opensnoop [-a|-A|-ceghstvxZ] [-f pathname] [-n name] [-p PID] | |
| # |
| 2016/11/12 00:29:20 Pinged successfully | |
| &{d4d32563d909d603a6b1d604d6902b942c922e10d838ca5683ca48f4f5c23234 [treeder/hello:latest] 94f30c9c34c2234448f1f8abf62b256fdbde30542b526fa2ee9cdba3ecba28b5 2016-10-06 00:00:00.264 +0000 UTC {4c573a7cf4a3 0 0 0 0 0 [] map[] [PATH=/usr/local/sbin:/usr/local/bin:/usr/sbin:/usr/bin:/sbin:/bin] [/bin/sh -c #(nop) ENTRYPOINT ["sh" "hello.sh"]] <nil> [] sha256:a52e7dd7e1b87c43a90db766ebe79563a38cff39a0d14ccfdad0069e741d612e map[] /app [sh hello.sh] [] [] [] map[] false false false false false false false false } 1.9.0 0xc420348000 amd64 0 0 [] <nil>} <nil> | |
| pull <nil> | |
| Create <nil> API error (500): (InternalError) Internal error (0f9925f0-a86f-11e6-a25b-37d5ab1798cf) |
| // This is a reduced test case for https://github.com/go-mgo/mgo/issues/254 | |
| // | |
| // What it does is to overload DialServer() and return a custom net.Conn. | |
| // Some of these custom connections timeout _once_ after the first 1000 bytes are read. | |
| // It seems like DialServer() is called more times than the PoolLimit, which is | |
| // set to 5, and not all these sockets are used, so for convenience, we pick | |
| // every third connection to automatically time out once. | |
| // It is still possible for this test to be slightly flaky, you may have to run it more than once. | |
| // | |
| // Remember to edit the Dial URL and the database name in insert to something valid. |