|
Behavioral Architecture
|
ROS architecture for simulating a robot into a discrete 2D enviroment. The robot has 3 behaviors:
The user can interact with the robot via command and pointed gestures
The architercture is composed by 4 components:
The finite state machine is composed by 3 state (robot behaviors):
The messages are:
Point
: 2D position used for pointed gestures and target positionString
: used for user command and feedback from "motion" componentThe parameters are:
home_pos_x,home_pos_x
: define the home position in the map (double)person_pos_x,person_pos_y
: define the person position in the map (double)map_x,map_y
: define the dimensions of the map (integer)min_delay_command,max_delay_command
: define the min and max delay for sending the command "play" (double)min_delay_gesture,max_delay_gesture
: define the min and max delay for sending the pointed gesture (double)min_delay_robot_motion,max_delay_robot_motion
: define the min and max delay for simulating the robot motion (double)min_transition_play_normal,max_transition_play_normal
: define the min and max delay to trasit between PLAY and NORMAL (integer)min_transition_normal_sleep,max_transition_normal_sleep
: define the min and max delay to trasit between NORMAL and SLEEP (integer)min_sleep_delay,max_sleep_delay
: define the min and max delay for the SLEEP state (double)There are 3 packages:
Sensoring
: contains the command.py and gesture.py files used to simulate the user command and pointed gesturesRobot control
: contains the motion.py file used to simulate robot motionCommand manager
: contains the command_manager.py file that implements the FSM of robot behaviors.In order to run this software, the following prerequisities are needed:
Before running the software, you must have all files as executable otherwise you can make them executable with the following command
To run the software
The robot interact with a human via a command and pointed gestures. It moves inside a 2D discrete enviroment. Both robot targets position and pointed gestures belongs to the map. The robot has 3 behaviors: Play,Normal,Sleep. The robot can receive any command while executing PLAY state and it can receive any command or pointed gesture while executing SLEEP state but all of them are ignored while executing one of the two states. The initial state is NORMAL. The only command is "play". There two predifined positions inside the map ("Person" and "Home" position) that cannot be changed during the execution. When the robot moves, it cannot respond to other stimulus. The robot can go into Person or "Home" position during NORMAL behavior and it can go into Home position during PLAY state.
Simone Voto - simon e.vo to98@ gmai l.com


overall schedule
semester 2019 - winter
- write proposal
- read the closely related literature
- catch up on literary studies
semester 2020 - summer
- gather all aesthetic judgments about code
- read about questions of clarity, simplicity, elegance
-
-
- establish feature set (list of adjectives with thorough definitions)
semester 2020 - winter
- read about understanding (human-human)
- read about understanding (human-machine)
- relate feature set to understanding
semester 2021 - summer
- read about programming languages
- relate feature set to each language
semester 2021 - winter
- case studies
- conclusions and re-conceptualizing in light of findings
- write
semester 2022 - summer


Vice Hierarch Eindburgh:
%name%, are you the next Judicator?
Do you wish to be an executor of Kamael law?
"I don't know."


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I am a passionate learner. I enjoy programming and so far I have learnt a lot. I decided to take programming classes because I developed interest in coding a while ago but wasn't as motivated then as I am now. Programming is a little challenging but a very fun and amazing skill to have under my belt.
Some of my interests include tech ( ofcourse ) and:
My highest level of education is high school diploma.Other qualifications include:


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| ifsogui.progressbar: | Types | Modinfo | Source |
| ifsoGUI_ProgressBar | Progressbar Type. |
| Type ifsoGUI_ProgressBar Extends ifsoGUI_Base | |
| Description | Progressbar Type. |
| Methods Summary | |
|---|---|
| CanActive | Can this gadget be active. |
| Draw | Draws the gadget. |
| GetBarReversed | Gets if the bar is drawn reversed. |
| GetDrawStyle | Returns the drawstyle. |
| GetMax | Returns the maximum value of the progressbar. |
| GetMin | Returns the minimum value of the progressbar. |
| GetShowBorder | Returns whether or not the border is showing. |
| GetValue | Returns the current value of the progressbar. |
| IsMouseOver | Returns whether or not the mouse is over the gadget. |
| LoadSkin | Loads a skin for one instance of the gadget. |
| MouseOut | Called when the mouse leaves the gadget. |
| MouseOver | Called when the mouse is over this gadget. |
| Refresh | Refreshes the gadget. |
| SetBarColor | Sets the color of the bar. |
| SetBarReversed | Sets if the bar is drawn reversed. |
| SetDrawStyle | Sets the draw style of the progressbar. |
| SetEnabled | Sets the gadget enabled/disabled. |
| SetMax | Sets the maximum value of the progressbar. |
| SetMin | Sets the minimum value of the progressbar. |
| SetMinMax | Sets the minimum and maximum values of the progressbar in one call. |
| SetShowBorder | Sets whether or not the border will show. |
| SetTabOrder | Sets the gadgets TabOrder. 0=Do not tab to this gadget -1=Last in the Tab Order. |
| SetValue | Sets the current value of the progressbar. |
| Functions Summary | |
|---|---|
| Create | Create and returns a progressbar gadget. |
| LoadTheme | Called to load the graphics when a new theme is loaded. |
| SystemEvent | GUI system event occured. |
| Method CanActive:Int() | |
| Description | Can this gadget be active. |
| Information | Internal function should not be called by the user. |
| Method Draw(parX:Int, parY:Int, parW:Int, parH:Int) | |
| Description | Draws the gadget. |
| Information | Internal function should not be called by the user. |
| Method GetBarReversed:Int() 'Get if the bar is reversed | |
| Description | Gets if the bar is drawn reversed. |
| Information | Normal is Left to Right or Bottom to Top Reversed is Right to Left or Top to Bottom. |
| Method GetDrawStyle:Int() | |
| Description | Returns the drawstyle. |
| Method GetMax:Int() | |
| Description | Returns the maximum value of the progressbar. |
| Method GetMin:Int() | |
| Description | Returns the minimum value of the progressbar. |
| Method GetShowBorder:Int() | |
| Description | Returns whether or not the border is showing. |
| Method GetValue:Int() | |
| Description | Returns the current value of the progressbar. |
| Method IsMouseOver:Int(parX:Int, parY:Int, parW:Int, parH:Int, iMouseX:Int, iMouseY:Int) | |
| Description | Returns whether or not the mouse is over the gadget. |
| Information | Internal function should not be called by the user. |
| Method LoadSkin(strSkin:String) | |
| Description | Loads a skin for one instance of the gadget. |
| Method MouseOut(iMouseX:Int, iMouseY:Int, gOverGadget:ifsoGUI_Base) 'No exit events | |
| Description | Called when the mouse leaves the gadget. |
| Information | Internal function should not be called by the user. |
| Method MouseOver(iMouseX:Int, iMouseY:Int, gWasOverGadget:ifsoGUI_Base) 'No enter events | |
| Description | Called when the mouse is over this gadget. |
| Information | Internal function should not be called by the user. |
| Method Refresh() | |
| Description | Refreshes the gadget. |
| Information | Recalculates any geometry/font changes, etc. Internal function should not be called by the user. |
| Method SetBarColor(iRed:Int, iGreen:Int, iBlue:Int) 'Set color of the gadget | |
| Description | Sets the color of the bar. |
| Method SetBarReversed(intReversed:Int) 'Set bar reversed | |
| Description | Sets if the bar is drawn reversed. |
| Information | Normal is Left to Right or Bottom to Top Reversed is Right to Left or Top to Bottom. |
| Method SetDrawStyle(intStyle:Int) | |
| Description | Sets the draw style of the progressbar. |
| Information | ifsoGUI_DRAWSTYLE_STRETCH - The graphic is stretched. ifsoGUI_DRAWSTYLE_TILE - The graphic is tiled. |
| Method SetEnabled(bEnabled:Int = True) 'Sets the gadget enabled or not. | |
| Description | Sets the gadget enabled/disabled. |
| Method SetMax(intMax:Int) | |
| Description | Sets the maximum value of the progressbar. |
| Method SetMin(intMin:Int) | |
| Description | Sets the minimum value of the progressbar. |
| Method SetMinMax(intMin:Int, intMax:Int) | |
| Description | Sets the minimum and maximum values of the progressbar in one call. |
| Method SetShowBorder(bShowBorder:Int) | |
| Description | Sets whether or not the border will show. |
| Method SetTabOrder(iTabOrder:Int) | |
| Description | Sets the gadgets TabOrder. 0=Do not tab to this gadget -1=Last in the Tab Order. |
| Method SetValue(intValue:Int) | |
| Description | Sets the current value of the progressbar. |
| Function Create:ifsoGUI_ProgressBar(iX:Int, iY:Int, iW:Int, iH:Int, strName:String, bHorizontal:Int = True) | |
| Description | Create and returns a progressbar gadget. |
| Function LoadTheme() | |
| Description | Called to load the graphics when a new theme is loaded. |
| Information | A GadgetSystemEvent is then sent out to all gadgets. Internal function should not be called by the user. |
| Function SystemEvent(id:Int, data:Int) | |
| Description | GUI system event occured. |
| Information | Internal function should not be called by the user. |
| Version | 1.00 |
|---|---|
| Author | Marcus Trisdale |
| Copyright | (c) 2009 Marcus Trisdale |


Gareth Bale mocks Real Madrid with Welsh flag
Wales, golf, Madrid, in that order, read the flag that he stood grinning behind like a Cheshire cat
by Sport ENGareth Bale has mocked Real Madrid in public. After helping Wales reach Euro 2020 with a 2-0 win over Hungary, he posed in a photo which has sent Madridismo into a rage.
The Welshman stood grinning with his team-mates behind a banner of the Welsh flag with the words "Wales, golf, Madrid, in that order", something that the fans sang through the game too.
Bale played 88 minutes after not playing in any recent Madrid matches with an injury, and his professionalism and dedication to the club has been called into question.
Golf has been his favourite past-time and always caused trouble at Madrid, because it seems sometimes he prioritises the sport over football.


Hello, I'm Stathis Kaloutsidis and I developed this app for education purposes and as Proof of Concept (POC).
This web application
collects users height via a HTML form and send the data to a secure PostgreSQL database. Then it send an
email back to the user with statistical data about the average height of all records that are stored in
the db.
Tech Stack: Python, Flask & PostgreSQL.
The Mojicon are made by Sunbzy and doodles by Open Doodles.
You can visit my
GitHub and
LinkedIn for more!


EXO drop concept trailer for 'EXODEUX' & 'Obsession' comeback schedule
by germainejEXO have dropped the concept trailer for 'EXODEUX' and their 'Obsession' comeback schedule.
The trailer above reveals a dark, mysterious, and intense concept revolving around planets, DNA, the apocalypse, and weapons. The comeback schedule below for EXO's sixth album 'Obsession' also reveals that fans can expect the first teaser images and clip on November 11, while the album drops on November 27 KST.
Stay tuned for more on EXO's 'Obsession'!


Rob Gonsalves, “The Sun Sets Sail”, 2001 14 Nov 2019, 18:09 by Mutter Rob Gonsalves — Wikipedia en.m.wikipedia.org


You can change Colour Mode and Difficulty from menu.
Choose the coloured box matching with this colour code.


---
layout: homepage
title: Julia Community
---
{% include mainmenu.html %}
Please take a moment to read the Julia Community Standards. We expect that your participation in any Julia related forum, online or offline, respects these standards.
We use GitHub for the development of Julia itself. There we host our source code, track issues, and accept pull requests. We use the issue tracker for bug reports, feature requests, and proposed changes. For support and questions, please use Discourse.
The primary online discussion venue for Julia is the Discourse forum. Discourse is the right place to do any of the following:
For Chinese users a Simplified Chinese version discourse is also hosted by the community. Please click this Julia中文论坛 link.
The Discourse forum replaced the Julia mailing lists, the largest of which were julia-users and julia-dev, at the end of 2016. Those lists are now read-only but you may like to search them to see if your question has already been raised.
For casual conversation and quick, informal questions, we have an official Julia Slack. Slack is also a good place to start if you think you need help but aren't quite sure what you should be asking or where to ask it. To join, please visit slackinvite.julialang.org to agree to the community code of conduct and receive an invitation.
All the JuliaCon videos and other videos of general interest in the community are uploaded to the Julia Language YouTube channel.
On Twitter, tweet with the #julialang hashtag.
Julia also has a presence on Stack Overflow under the julia-lang tag, and on Stack Overflow en Español under julia.
For those who prefer IRC to our official forums, there is a #julia channel on Freenode. We also have an unofficial Gitter channel. There is a small Julia subreddit for casual discussion.
The Julia community is global, with meetups all over the world and resources in a variety of different languages.
Julia's official documentation is in English, but many groups work to translate and localize documentation and other resources. A few such groups that are leading these efforts include:
Please let us know if you have another organization dedicated to these efforts.
Julia has local user groups around the world, including:
The following is a non-comprehensive list of Julia GitHub groups grouped by domain:


We will send a verification code to the mobile phone number registered on your account. Upon completion your account will be submitted for authorisation by the Silverwing Team.
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Applying styles to venn diagrams
Here are some examples of applying different styles to the same venn diagram, using a dataset from
this paper
. View the source to get the see the code to generate.


{% extends 'layout-lab-5-a-to-z.html' %} {% block pageTitle %} Causes - Cervical cancer - NHS.UK {% endblock %} {% block beforeContent %} {% endblock %} {% block content %}
Almost all cases of cervical cancer are caused by the human papillomavirus (HPV).
Almost all cervical cancer cases occur in women who have been previously infected with HPV.
HPV is a group of viruses, rather than a single virus. There are more than 100 different types.

Most women will get some type of HPV infection at some point in their lives.
Some types of HPV do not cause any noticeable symptoms and the infection will pass without treatment.
Others can cause genital warts, although these types are not linked to an increased risk of cervical cancer.
But at least 15 types of HPV are considered high-risk for cervical cancer. The 2 highest risk are HPV 16 and HPV 18, which cause the majority of cervical cancers.
High-risk types of HPV are thought to stop the cells working normally, which can eventually cause them to reproduce uncontrollably, leading to the growth of a cancerous tumour.
As most types of HPV do not cause any symptoms, you or your partner could have the virus for months or years without knowing it.
See preventing cervical cancer for more information about reducing your chances of developing an HPV infection.
Cancer of the cervix usually takes many years to develop. Before it does, the cells in the cervix often show changes.
These cervical abnormalities are known as cervical intraepithelial neoplasia (CIN) or, less commonly, cervical glandular intraepithelial neoplasia (CGIN) depending on which cells are affected.
CIN and CGIN are pre-cancerous conditions. Pre-cancerous conditions do not pose an immediate threat to a person's health. But if they're not checked and treated, they can potentially develop into cancer.
However, even if you develop CIN or CGIN, the chances of them turning into cervical cancer are very small.
And if the changes are discovered during cervical screening, treatment is highly successful.
The progression from HPV infection to developing CIN or CGIN and then cervical cancer is very slow, often taking 10 to 20 years.
Find out more about cervical screening results
HPV infection being very common but cervical cancer relatively uncommon suggests that only a very small proportion of women are vulnerable to the effects of an HPV infection.
There appear to be additional risk factors that affect a woman's chance of developing cervical cancer.
These include:
The reason for the link between cervical cancer and childbirth is unclear.
One theory is that the hormonal changes that occur during pregnancy may make the cervix more vulnerable to the effects of HPV.
Page last reviewed: 8 August 2017
Next review due: 8 August 2020


From the fundamentals of user experience to the algebra of design fundamentals, visual aesthetics and beauty have been proven time and time again to enhance value and reinforce quality.
Our team stays up to date with industry advancements keeping your site robust and consistently relevant. Our engineers are at the razors edge of development. You're in good hands.
At Aestheke, we create digital properties that engage and inspire. By combining advanced site analytics, research driven marketing and cutting edge design, we provide each brand exactly what they need to stand out, hearts and minds.
From original Shopify Templates to advanced customization, let us build you a store that maximizes sales and ensures that your customers return.
With a Master's in Communication and Information Studies, Genna Geller is a marketing and branding expert. With a whole host of skills, from design and identity curation to email marketing and social media optimization, she has a proven track record of bringing brands, companies and individuals to the next level.
With a background in Fullstack Development, Anthropology and Music, Liam has worn a few hats. With a passion for technology and design, he started Aestheke Inc because both people and companies need a dedicated navigator to find success in our modern digital landscape.
"I love programming. It's the perfect union between technical proficiency and creative intuition and that works for me. Let's make it work for you."
Far far away, behind the word mountains, far from the countries Vokalia and Consonantia, there live the blind texts. Separated they live in Bookmarksgrove right at the coast of the Semantics, a large language ocean.


| [ < ] | [ > ] | [ << ] | [ Up ] | [ >> ] | [Top] | [Contents] | [Index] | [ ? ] |
The principal purposes of using a debugger are so that you can stop your program before it terminates; or so that, if your program runs into trouble, you can investigate and find out why.
Inside GDB, your program may stop for any of several reasons,
such as a signal, a breakpoint, or reaching a new line after a
GDB command such as step
. You may then examine and
change variables, set new breakpoints or remove old ones, and then
continue execution. Usually, the messages shown by GDB provide
ample explanation of the status of your program--but you can also
explicitly request this information at any time.
info program
5.1 Breakpoints, Watchpoints, and Catchpoints Breakpoints, watchpoints, and catchpoints 5.2 Continuing and Stepping Resuming execution 5.3 Signals 5.4 Stopping and Starting Multi-thread Programs Stopping and starting multi-thread programs
| [ < ] | [ > ] | [ << ] | [ Up ] | [ >> ] | [Top] | [Contents] | [Index] | [ ? ] |
A breakpoint makes your program stop whenever a certain point in
the program is reached. For each breakpoint, you can add conditions to
control in finer detail whether your program stops. You can set
breakpoints with the break
command and its variants (see section Setting Breakpoints), to specify the place where your program
should stop by line number, function name or exact address in the
program.
On some systems, you can set breakpoints in shared libraries before
the executable is run. There is a minor limitation on HP-UX systems:
you must wait until the executable is run in order to set breakpoints
in shared library routines that are not called directly by the program
(for example, routines that are arguments in a pthread_create
call).
A watchpoint is a special breakpoint that stops your program when the value of an expression changes. The expression may be a value of a variable, or it could involve values of one or more variables combined by operators, such as `a + b'. This is sometimes called data breakpoints. You must use a different command to set watchpoints (see section Setting Watchpoints), but aside from that, you can manage a watchpoint like any other breakpoint: you enable, disable, and delete both breakpoints and watchpoints using the same commands.
You can arrange to have values from your program displayed automatically whenever GDB stops at a breakpoint. See section Automatic Display.
A catchpoint is another special breakpoint that stops your program
when a certain kind of event occurs, such as the throwing of a C++
exception or the loading of a library. As with watchpoints, you use a
different command to set a catchpoint (see section Setting Catchpoints), but aside from that, you can manage a catchpoint like any
other breakpoint. (To stop when your program receives a signal, use the
handle
command; see Signals.)
GDB assigns a number to each breakpoint, watchpoint, or catchpoint when you create it; these numbers are successive integers starting with one. In many of the commands for controlling various features of breakpoints you use the breakpoint number to say which breakpoint you want to change. Each breakpoint may be enabled or disabled; if disabled, it has no effect on your program until you enable it again.
Some GDB commands accept a range of breakpoints on which to operate. A breakpoint range is either a single breakpoint number, like `5', or two such numbers, in increasing order, separated by a hyphen, like `5-7'. When a breakpoint range is given to a command, all breakpoints in that range are operated on.
5.1.1 Setting Breakpoints Setting breakpoints 5.1.2 Setting Watchpoints Setting watchpoints 5.1.3 Setting Catchpoints Setting catchpoints 5.1.4 Deleting Breakpoints Deleting breakpoints 5.1.5 Disabling Breakpoints Disabling breakpoints 5.1.6 Break Conditions Break conditions 5.1.7 Breakpoint Command Lists Breakpoint command lists 5.1.8 Breakpoint Menus Breakpoint menus 5.1.9 "Cannot insert breakpoints" 5.1.10 "Breakpoint address adjusted..."
| [ < ] | [ > ] | [ << ] | [ Up ] | [ >> ] | [Top] | [Contents] | [Index] | [ ? ] |
Breakpoints are set with the break
command (abbreviated
b
). The debugger convenience variable `$bpnum' records the
number of the breakpoint you've set most recently; see Convenience Variables, for a discussion of what you can do with
convenience variables.
break location
When using source languages that permit overloading of symbols, such as C++, a function name may refer to more than one possible place to break. See section Breakpoint Menus, for a discussion of that situation.
break
break
sets a breakpoint at
the next instruction to be executed in the selected stack frame
(see section Examining the Stack). In any selected frame but the
innermost, this makes your program stop as soon as control
returns to that frame. This is similar to the effect of a
finish
command in the frame inside the selected frame--except
that finish
does not leave an active breakpoint. If you use
break
without an argument in the innermost frame, GDB stops
the next time it reaches the current location; this may be useful
inside loops.
GDB normally ignores breakpoints when it resumes execution, until at least one instruction has been executed. If it did not do this, you would be unable to proceed past a breakpoint without first disabling the breakpoint. This rule applies whether or not the breakpoint already existed when your program stopped.
break ... if cond
tbreak args
break
command, and the breakpoint is set in the same
way, but the breakpoint is automatically deleted after the first time your
program stops there. See section Disabling Breakpoints.
hbreak args
break
command and the breakpoint is set in the same way, but the
breakpoint requires hardware support and some target hardware may not
have this support. The main purpose of this is EPROM/ROM code
debugging, so you can set a breakpoint at an instruction without
changing the instruction. This can be used with the new trap-generation
provided by SPARClite DSU and most x86-based targets. These targets
will generate traps when a program accesses some data or instruction
address that is assigned to the debug registers. However the hardware
breakpoint registers can take a limited number of breakpoints. For
example, on the DSU, only two data breakpoints can be set at a time, and
GDB will reject this command if more than two are used. Delete
or disable unused hardware breakpoints before setting new ones
(see section Disabling Breakpoints).
See section Break Conditions.
For remote targets, you can restrict the number of hardware
breakpoints GDB will use, see set remote hardware-breakpoint-limit.
thbreak args
hbreak
command and the breakpoint is set in
the same way. However, like the tbreak
command,
the breakpoint is automatically deleted after the
first time your program stops there. Also, like the hbreak
command, the breakpoint requires hardware support and some target hardware
may not have this support. See section Disabling Breakpoints.
See also Break Conditions.
rbreak regex
break
command. You can delete them, disable them, or make
them conditional the same way as any other breakpoint.
The syntax of the regular expression is the standard one used with tools
like `grep'. Note that this is different from the syntax used by
shells, so for instance foo*
matches all functions that include
an fo
followed by zero or more o
s. There is an implicit
.*
leading and trailing the regular expression you supply, so to
match only functions that begin with foo
, use ^foo
.
When debugging C++ programs, rbreak
is useful for setting
breakpoints on overloaded functions that are not members of any special
classes.
The rbreak
command can be used to set breakpoints in
all the functions in a program, like this:
(gdb) rbreak . |
info breakpoints [n]
info break [n]
info watchpoints [n]
If a breakpoint is conditional, info break
shows the condition on
the line following the affected breakpoint; breakpoint commands, if any,
are listed after that. A pending breakpoint is allowed to have a condition
specified for it. The condition is not parsed for validity until a shared
library is loaded that allows the pending breakpoint to resolve to a
valid location.
info break
with a breakpoint
number n as argument lists only that breakpoint. The
convenience variable $_
and the default examining-address for
the x
command are set to the address of the last breakpoint
listed (see section Examining Memory).
info break
displays a count of the number of times the breakpoint
has been hit. This is especially useful in conjunction with the
ignore
command. You can ignore a large number of breakpoint
hits, look at the breakpoint info to see how many times the breakpoint
was hit, and then run again, ignoring one less than that number. This
will get you quickly to the last hit of that breakpoint.
GDB allows you to set any number of breakpoints at the same place in your program. There is nothing silly or meaningless about this. When the breakpoints are conditional, this is even useful (see section Break Conditions).
It is possible that a breakpoint corresponds to several locations in your program. Examples of this situation are:
In all those cases, GDB will insert a breakpoint at all the relevant locations.
A breakpoint with multiple locations is displayed in the breakpoint table using several rows--one header row, followed by one row for each breakpoint location. The header row has `<MULTIPLE>' in the address column. The rows for individual locations contain the actual addresses for locations, and show the functions to which those locations belong. The number column for a location is of the form breakpoint-number.location-number.
For example:
Num Type Disp Enb Address What 1 breakpoint keep y <MULTIPLE> stop only if i==1 breakpoint already hit 1 time 1.1 y 0x080486a2 in void foo<int>() at t.cc:8 1.2 y 0x080486ca in void foo<double>() at t.cc:8 |
Each location can be individually enabled or disabled by passing
breakpoint-number.location-number as argument to the
enable
and disable
commands. Note that you cannot
delete the individual locations from the list, you can only delete the
entire list of locations that belong to their parent breakpoint (with
the delete num command, where num is the number of
the parent breakpoint, 1 in the above example). Disabling or enabling
the parent breakpoint (see section 5.1.5 Disabling Breakpoints) affects all of the locations
that belong to that breakpoint.
It's quite common to have a breakpoint inside a shared library. Shared libraries can be loaded and unloaded explicitly, and possibly repeatedly, as the program is executed. To support this use case, GDB updates breakpoint locations whenever any shared library is loaded or unloaded. Typically, you would set a breakpoint in a shared library at the beginning of your debugging session, when the library is not loaded, and when the symbols from the library are not available. When you try to set breakpoint, GDB will ask you if you want to set a so called pending breakpoint---breakpoint whose address is not yet resolved.
After the program is run, whenever a new shared library is loaded, GDB reevaluates all the breakpoints. When a newly loaded shared library contains the symbol or line referred to by some pending breakpoint, that breakpoint is resolved and becomes an ordinary breakpoint. When a library is unloaded, all breakpoints that refer to its symbols or source lines become pending again.
This logic works for breakpoints with multiple locations, too. For example, if you have a breakpoint in a C++ template function, and a newly loaded shared library has an instantiation of that template, a new location is added to the list of locations for the breakpoint.
Except for having unresolved address, pending breakpoints do not differ from regular breakpoints. You can set conditions or commands, enable and disable them and perform other breakpoint operations.
GDB provides some additional commands for controlling what happens when the `break' command cannot resolve breakpoint address specification to an address:
set breakpoint pending auto
set breakpoint pending on
set breakpoint pending off
show breakpoint pending
The settings above only affect the break
command and its
variants. Once breakpoint is set, it will be automatically updated
as shared libraries are loaded and unloaded.
For some targets, GDB can automatically decide if hardware or
software breakpoints should be used, depending on whether the
breakpoint address is read-only or read-write. This applies to
breakpoints set with the break
command as well as to internal
breakpoints set by commands like next
and finish
. For
breakpoints set with hbreak
, GDB will always use hardware
breakpoints.
You can control this automatic behaviour with the following commands::
set breakpoint auto-hw on
set breakpoint auto-hw off
GDB itself sometimes sets breakpoints in your program for
special purposes, such as proper handling of longjmp
(in C
programs). These internal breakpoints are assigned negative numbers,
starting with -1
; `info breakpoints' does not display them.
You can see these breakpoints with the GDB maintenance command
`maint info breakpoints' (see maint info breakpoints).
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You can use a watchpoint to stop execution whenever the value of an expression changes, without having to predict a particular place where this may happen. (This is sometimes called a data breakpoint.) The expression may be as simple as the value of a single variable, or as complex as many variables combined by operators. Examples include:
int
occupies 4 bytes).
Depending on your system, watchpoints may be implemented in software or hardware. GDB does software watchpointing by single-stepping your program and testing the variable's value each time, which is hundreds of times slower than normal execution. (But this may still be worth it, to catch errors where you have no clue what part of your program is the culprit.)
On some systems, such as HP-UX, PowerPC, GNU/Linux and most other x86-based targets, GDB includes support for hardware watchpoints, which do not slow down the running of your program.
watch expr [thread threadnum]
(gdb) watch foo |
If the command includes a [thread threadnum]
clause, GDB breaks only when the thread identified by
threadnum changes the value of expr. If any other threads
change the value of expr, GDB will not break. Note
that watchpoints restricted to a single thread in this way only work
with Hardware Watchpoints.
rwatch expr [thread threadnum]
awatch expr [thread threadnum]
info watchpoints
info break
(see section 5.1.1 Setting Breakpoints).
GDB sets a hardware watchpoint if possible. Hardware watchpoints execute very quickly, and the debugger reports a change in value at the exact instruction where the change occurs. If GDB cannot set a hardware watchpoint, it sets a software watchpoint, which executes more slowly and reports the change in value at the next statement, not the instruction, after the change occurs.
You can force GDB to use only software watchpoints with the
set can-use-hw-watchpoints 0 command. With this variable set to
zero, GDB will never try to use hardware watchpoints, even if
the underlying system supports them. (Note that hardware-assisted
watchpoints that were set before setting
can-use-hw-watchpoints
to zero will still use the hardware
mechanism of watching expression values.)
set can-use-hw-watchpoints
show can-use-hw-watchpoints
For remote targets, you can restrict the number of hardware watchpoints GDB will use, see set remote hardware-breakpoint-limit.
When you issue the watch
command, GDB reports
Hardware watchpoint num: expr |
if it was able to set a hardware watchpoint.
Currently, the awatch
and rwatch
commands can only set
hardware watchpoints, because accesses to data that don't change the
value of the watched expression cannot be detected without examining
every instruction as it is being executed, and GDB does not do
that currently. If GDB finds that it is unable to set a
hardware breakpoint with the awatch
or rwatch
command, it
will print a message like this:
Expression cannot be implemented with read/access watchpoint. |
Sometimes, GDB cannot set a hardware watchpoint because the data type of the watched expression is wider than what a hardware watchpoint on the target machine can handle. For example, some systems can only watch regions that are up to 4 bytes wide; on such systems you cannot set hardware watchpoints for an expression that yields a double-precision floating-point number (which is typically 8 bytes wide). As a work-around, it might be possible to break the large region into a series of smaller ones and watch them with separate watchpoints.
If you set too many hardware watchpoints, GDB might be unable to insert all of them when you resume the execution of your program. Since the precise number of active watchpoints is unknown until such time as the program is about to be resumed, GDB might not be able to warn you about this when you set the watchpoints, and the warning will be printed only when the program is resumed:
Hardware watchpoint num: Could not insert watchpoint |
If this happens, delete or disable some of the watchpoints.
Watching complex expressions that reference many variables can also exhaust the resources available for hardware-assisted watchpoints. That's because GDB needs to watch every variable in the expression with separately allocated resources.
The SPARClite DSU will generate traps when a program accesses some data
or instruction address that is assigned to the debug registers. For the
data addresses, DSU facilitates the watch
command. However the
hardware breakpoint registers can only take two data watchpoints, and
both watchpoints must be the same kind. For example, you can set two
watchpoints with watch
commands, two with rwatch
commands,
or two with awatch
commands, but you cannot set one
watchpoint with one command and the other with a different command.
GDB will reject the command if you try to mix watchpoints.
Delete or disable unused watchpoint commands before setting new ones.
If you call a function interactively using print
or call
,
any watchpoints you have set will be inactive until GDB reaches another
kind of breakpoint or the call completes.
GDB automatically deletes watchpoints that watch local
(automatic) variables, or expressions that involve such variables, when
they go out of scope, that is, when the execution leaves the block in
which these variables were defined. In particular, when the program
being debugged terminates, all local variables go out of scope,
and so only watchpoints that watch global variables remain set. If you
rerun the program, you will need to set all such watchpoints again. One
way of doing that would be to set a code breakpoint at the entry to the
main
function and when it breaks, set all the watchpoints.
In multi-threaded programs, watchpoints will detect changes to the watched expression from every thread.
Warning: In multi-threaded programs, software watchpoints have only limited usefulness. If GDB creates a software watchpoint, it can only watch the value of an expression in a single thread. If you are confident that the expression can only change due to the current thread's activity (and if you are also confident that no other thread can become current), then you can use software watchpoints as usual. However, GDB may not notice when a non-current thread's activity changes the expression. (Hardware watchpoints, in contrast, watch an expression in all threads.)
See set remote hardware-watchpoint-limit.
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You can use catchpoints to cause the debugger to stop for certain
kinds of program events, such as C++ exceptions or the loading of a
shared library. Use the catch
command to set a catchpoint.
catch event
throw
catch
exception
catch exception Program_Error
),
the debugger will stop only when this specific exception is raised.
Otherwise, the debugger stops execution when any Ada exception is raised.
exception unhandled
assert
exec
exec
. This is currently only available for HP-UX
and GNU/Linux.
fork
fork
. This is currently only available for HP-UX
and GNU/Linux.
vfork
vfork
. This is currently only available for HP-UX
and GNU/Linux.
load
load libname
unload
unload libname
tcatch event
Use the info break
command to list the current catchpoints.
There are currently some limitations to C++ exception handling
(catch throw
and catch catch
) in GDB:
Sometimes catch
is not the best way to debug exception handling:
if you need to know exactly where an exception is raised, it is better to
stop before the exception handler is called, since that way you
can see the stack before any unwinding takes place. If you set a
breakpoint in an exception handler instead, it may not be easy to find
out where the exception was raised.
To stop just before an exception handler is called, you need some
knowledge of the implementation. In the case of GNU C++, exceptions are
raised by calling a library function named __raise_exception
which has the following ANSI C interface:
/* addr is where the exception identifier is stored. id is the exception identifier. */ void __raise_exception (void **addr, void *id); |
To make the debugger catch all exceptions before any stack
unwinding takes place, set a breakpoint on __raise_exception
(see section Breakpoints; Watchpoints; and Exceptions).
With a conditional breakpoint (see section Break Conditions) that depends on the value of id, you can stop your program when a specific exception is raised. You can use multiple conditional breakpoints to stop your program when any of a number of exceptions are raised.
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It is often necessary to eliminate a breakpoint, watchpoint, or catchpoint once it has done its job and you no longer want your program to stop there. This is called deleting the breakpoint. A breakpoint that has been deleted no longer exists; it is forgotten.
With the clear
command you can delete breakpoints according to
where they are in your program. With the delete
command you can
delete individual breakpoints, watchpoints, or catchpoints by specifying
their breakpoint numbers.
It is not necessary to delete a breakpoint to proceed past it. GDB automatically ignores breakpoints on the first instruction to be executed when you continue execution without changing the execution address.
clear
clear location
clear function
clear filename:function
clear linenum
clear filename:linenum
delete [breakpoints] [range...]
set
confirm off
). You can abbreviate this command as d
.
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Rather than deleting a breakpoint, watchpoint, or catchpoint, you might prefer to disable it. This makes the breakpoint inoperative as if it had been deleted, but remembers the information on the breakpoint so that you can enable it again later.
You disable and enable breakpoints, watchpoints, and catchpoints with
the enable
and disable
commands, optionally specifying one
or more breakpoint numbers as arguments. Use info break
or
info watch
to print a list of breakpoints, watchpoints, and
catchpoints if you do not know which numbers to use.
Disabling and enabling a breakpoint that has multiple locations affects all of its locations.
A breakpoint, watchpoint, or catchpoint can have any of four different states of enablement:
break
command starts out in this state.
tbreak
command starts out in this state.
You can use the following commands to enable or disable breakpoints, watchpoints, and catchpoints:
disable [breakpoints] [range...]
disable
as dis
.
enable [breakpoints] [range...]
enable [breakpoints] once range...
enable [breakpoints] delete range...
tbreak
command start out in this state.
Except for a breakpoint set with tbreak
(see section Setting Breakpoints), breakpoints that you set are initially enabled;
subsequently, they become disabled or enabled only when you use one of
the commands above. (The command until
can set and delete a
breakpoint of its own, but it does not change the state of your other
breakpoints; see Continuing and Stepping.)
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The simplest sort of breakpoint breaks every time your program reaches a specified place. You can also specify a condition for a breakpoint. A condition is just a Boolean expression in your programming language (see section Expressions). A breakpoint with a condition evaluates the expression each time your program reaches it, and your program stops only if the condition is true.
This is the converse of using assertions for program validation; in that situation, you want to stop when the assertion is violated--that is, when the condition is false. In C, if you want to test an assertion expressed by the condition assert, you should set the condition `! assert' on the appropriate breakpoint.
Conditions are also accepted for watchpoints; you may not need them, since a watchpoint is inspecting the value of an expression anyhow--but it might be simpler, say, to just set a watchpoint on a variable name, and specify a condition that tests whether the new value is an interesting one.
Break conditions can have side effects, and may even call functions in your program. This can be useful, for example, to activate functions that log program progress, or to use your own print functions to format special data structures. The effects are completely predictable unless there is another enabled breakpoint at the same address. (In that case, GDB might see the other breakpoint first and stop your program without checking the condition of this one.) Note that breakpoint commands are usually more convenient and flexible than break conditions for the purpose of performing side effects when a breakpoint is reached (see section Breakpoint Command Lists).
Break conditions can be specified when a breakpoint is set, by using
`if' in the arguments to the break
command. See section Setting Breakpoints. They can also be changed at any time
with the condition
command.
You can also use the if
keyword with the watch
command.
The catch
command does not recognize the if
keyword;
condition
is the only way to impose a further condition on a
catchpoint.
condition bnum expression
condition
, GDB checks expression immediately for
syntactic correctness, and to determine whether symbols in it have
referents in the context of your breakpoint. If expression uses
symbols not referenced in the context of the breakpoint, GDB
prints an error message:
No symbol "foo" in current context. |
GDB does
not actually evaluate expression at the time the condition
command (or a command that sets a breakpoint with a condition, like
break if ...
) is given, however. See section Expressions.
condition bnum
A special case of a breakpoint condition is to stop only when the breakpoint has been reached a certain number of times. This is so useful that there is a special way to do it, using the ignore count of the breakpoint. Every breakpoint has an ignore count, which is an integer. Most of the time, the ignore count is zero, and therefore has no effect. But if your program reaches a breakpoint whose ignore count is positive, then instead of stopping, it just decrements the ignore count by one and continues. As a result, if the ignore count value is n, the breakpoint does not stop the next n times your program reaches it.
ignore bnum count
To make the breakpoint stop the next time it is reached, specify a count of zero.
When you use continue
to resume execution of your program from a
breakpoint, you can specify an ignore count directly as an argument to
continue
, rather than using ignore
. See section Continuing and Stepping.
If a breakpoint has a positive ignore count and a condition, the condition is not checked. Once the ignore count reaches zero, GDB resumes checking the condition.
You could achieve the effect of the ignore count with a condition such as `$foo-- <= 0' using a debugger convenience variable that is decremented each time. See section Convenience Variables.
Ignore counts apply to breakpoints, watchpoints, and catchpoints.
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You can give any breakpoint (or watchpoint or catchpoint) a series of commands to execute when your program stops due to that breakpoint. For example, you might want to print the values of certain expressions, or enable other breakpoints.
commands [bnum]
... command-list ...
end
end
to terminate the commands.
To remove all commands from a breakpoint, type commands
and
follow it immediately with end
; that is, give no commands.
With no bnum argument, commands
refers to the last
breakpoint, watchpoint, or catchpoint set (not to the breakpoint most
recently encountered).
Pressing RET as a means of repeating the last GDB command is disabled within a command-list.
You can use breakpoint commands to start your program up again. Simply
use the continue
command, or step
, or any other command
that resumes execution.
Any other commands in the command list, after a command that resumes
execution, are ignored. This is because any time you resume execution
(even with a simple next
or step
), you may encounter
another breakpoint--which could have its own command list, leading to
ambiguities about which list to execute.
If the first command you specify in a command list is silent
, the
usual message about stopping at a breakpoint is not printed. This may
be desirable for breakpoints that are to print a specific message and
then continue. If none of the remaining commands print anything, you
see no sign that the breakpoint was reached. silent
is
meaningful only at the beginning of a breakpoint command list.
The commands echo
, output
, and printf
allow you to
print precisely controlled output, and are often useful in silent
breakpoints. See section Commands for Controlled Output.
For example, here is how you could use breakpoint commands to print the
value of x
at entry to foo
whenever x
is positive.
break foo if x>0 commands silent printf "x is %d\n",x cont end |
One application for breakpoint commands is to compensate for one bug so
you can test for another. Put a breakpoint just after the erroneous line
of code, give it a condition to detect the case in which something
erroneous has been done, and give it commands to assign correct values
to any variables that need them. End with the continue
command
so that your program does not stop, and start with the silent
command so that no output is produced. Here is an example:
break 403 commands silent set x = y + 4 cont end |
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Some programming languages (notably C++ and Objective-C) permit a
single function name
to be defined several times, for application in different contexts.
This is called overloading. When a function name is overloaded,
`break function' is not enough to tell GDB where you want
a breakpoint. You can use explicit signature of the function, as in
`break function(types)', to specify which
particular version of the function you want. Otherwise, GDB offers
you a menu of numbered choices for different possible breakpoints, and
waits for your selection with the prompt `>'. The first two
options are always `[0] cancel' and `[1] all'. Typing 1
sets a breakpoint at each definition of function, and typing
0 aborts the break
command without setting any new
breakpoints.
For example, the following session excerpt shows an attempt to set a
breakpoint at the overloaded symbol String::after
.
We choose three particular definitions of that function name:
(gdb) b String::after [0] cancel [1] all [2] file:String.cc; line number:867 [3] file:String.cc; line number:860 [4] file:String.cc; line number:875 [5] file:String.cc; line number:853 [6] file:String.cc; line number:846 [7] file:String.cc; line number:735 > 2 4 6 Breakpoint 1 at 0xb26c: file String.cc, line 867. Breakpoint 2 at 0xb344: file String.cc, line 875. Breakpoint 3 at 0xafcc: file String.cc, line 846. Multiple breakpoints were set. Use the "delete" command to delete unwanted breakpoints. (gdb) |
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Cannot insert breakpoints. The same program may be running in another process. |
When this happens, you have three ways to proceed:
exec-file
command to specify
that GDB should run your program under that name.
Then start your program again.
A similar message can be printed if you request too many active hardware-assisted breakpoints and watchpoints:
Stopped; cannot insert breakpoints. You may have requested too many hardware breakpoints and watchpoints. |
This message is printed when you attempt to resume the program, since only then GDB knows exactly how many hardware breakpoints and watchpoints it needs to insert.
When this message is printed, you need to disable or remove some of the hardware-assisted breakpoints and watchpoints, and then continue.
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Some processor architectures place constraints on the addresses at which breakpoints may be placed. For architectures thus constrained, GDB will attempt to adjust the breakpoint's address to comply with the constraints dictated by the architecture.
One example of such an architecture is the Fujitsu FR-V. The FR-V is a VLIW architecture in which a number of RISC-like instructions may be bundled together for parallel execution. The FR-V architecture constrains the location of a breakpoint instruction within such a bundle to the instruction with the lowest address. GDB honors this constraint by adjusting a breakpoint's address to the first in the bundle.
It is not uncommon for optimized code to have bundles which contain instructions from different source statements, thus it may happen that a breakpoint's address will be adjusted from one source statement to another. Since this adjustment may significantly alter GDB's breakpoint related behavior from what the user expects, a warning is printed when the breakpoint is first set and also when the breakpoint is hit.
A warning like the one below is printed when setting a breakpoint that's been subject to address adjustment:
warning: Breakpoint address adjusted from 0x00010414 to 0x00010410. |
Such warnings are printed both for user settable and GDB's internal breakpoints. If you see one of these warnings, you should verify that a breakpoint set at the adjusted address will have the desired affect. If not, the breakpoint in question may be removed and other breakpoints may be set which will have the desired behavior. E.g., it may be sufficient to place the breakpoint at a later instruction. A conditional breakpoint may also be useful in some cases to prevent the breakpoint from triggering too often.
GDB will also issue a warning when stopping at one of these adjusted breakpoints:
warning: Breakpoint 1 address previously adjusted from 0x00010414 to 0x00010410. |
When this warning is encountered, it may be too late to take remedial action except in cases where the breakpoint is hit earlier or more frequently than expected.
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Continuing means resuming program execution until your program
completes normally. In contrast, stepping means executing just
one more "step" of your program, where "step" may mean either one
line of source code, or one machine instruction (depending on what
particular command you use). Either when continuing or when stepping,
your program may stop even sooner, due to a breakpoint or a signal. (If
it stops due to a signal, you may want to use handle
, or use
`signal 0' to resume execution. See section Signals.)
continue [ignore-count]
c [ignore-count]
fg [ignore-count]
ignore
(see section Break Conditions).
The argument ignore-count is meaningful only when your program
stopped due to a breakpoint. At other times, the argument to
continue
is ignored.
The synonyms c
and fg
(for foreground, as the
debugged program is deemed to be the foreground program) are provided
purely for convenience, and have exactly the same behavior as
continue
.
To resume execution at a different place, you can use return
(see section Returning from a Function) to go back to the
calling function; or jump
(see section Continuing at a Different Address) to go to an arbitrary location in your program.
A typical technique for using stepping is to set a breakpoint (see section Breakpoints; Watchpoints; and Catchpoints) at the beginning of the function or the section of your program where a problem is believed to lie, run your program until it stops at that breakpoint, and then step through the suspect area, examining the variables that are interesting, until you see the problem happen.
step
s
.
Warning: If you use thestep
command while control is within a function that was compiled without debugging information, execution proceeds until control reaches a function that does have debugging information. Likewise, it will not step into a function which is compiled without debugging information. To step through functions without debugging information, use thestepi
command, described below.
The step
command only stops at the first instruction of a source
line. This prevents the multiple stops that could otherwise occur in
switch
statements, for
loops, etc. step
continues
to stop if a function that has debugging information is called within
the line. In other words, step
steps inside any functions
called within the line.
Also, the step
command only enters a function if there is line
number information for the function. Otherwise it acts like the
next
command. This avoids problems when using cc -gl
on MIPS machines. Previously, step
entered subroutines if there
was any debugging information about the routine.
step count
step
, but do so count times. If a
breakpoint is reached, or a signal not related to stepping occurs before
count steps, stepping stops right away.
next [count]
step
, but function calls that appear within
the line of code are executed without stopping. Execution stops when
control reaches a different line of code at the original stack level
that was executing when you gave the next
command. This command
is abbreviated n
.
An argument count is a repeat count, as for step
.
The next
command only stops at the first instruction of a
source line. This prevents multiple stops that could otherwise occur in
switch
statements, for
loops, etc.
set step-mode
set step-mode on
set step-mode on
command causes the step
command to
stop at the first instruction of a function which contains no debug line
information rather than stepping over it.
This is useful in cases where you may be interested in inspecting the machine instructions of a function which has no symbolic info and do not want GDB to automatically skip over this function.
set step-mode off
step
command to step over any functions which contains no
debug information. This is the default.
show step-mode
finish
Contrast this with the return
command (see section Returning from a Function).
until
u
next
command, except that when until
encounters a jump, it
automatically continues execution until the program counter is greater
than the address of the jump.
This means that when you reach the end of a loop after single stepping
though it, until
makes your program continue execution until it
exits the loop. In contrast, a next
command at the end of a loop
simply steps back to the beginning of the loop, which forces you to step
through the next iteration.
until
always stops your program if it attempts to exit the current
stack frame.
until
may produce somewhat counterintuitive results if the order
of machine code does not match the order of the source lines. For
example, in the following excerpt from a debugging session, the f
(frame
) command shows that execution is stopped at line
206
; yet when we use until
, we get to line 195
:
(gdb) f #0 main (argc=4, argv=0xf7fffae8) at m4.c:206 206 expand_input(); (gdb) until 195 for ( ; argc > 0; NEXTARG) { |
This happened because, for execution efficiency, the compiler had
generated code for the loop closure test at the end, rather than the
start, of the loop--even though the test in a C for
-loop is
written before the body of the loop. The until
command appeared
to step back to the beginning of the loop when it advanced to this
expression; however, it has not really gone to an earlier
statement--not in terms of the actual machine code.
until
with no argument works by means of single
instruction stepping, and hence is slower than until
with an
argument.
until location
u location
until
without an argument. The specified
location is actually reached only if it is in the current frame. This
implies that until
can be used to skip over recursive function
invocations. For instance in the code below, if the current location is
line 96
, issuing until 99
will execute the program up to
line 99
in the same invocation of factorial, i.e., after the inner
invocations have returned.
94 int factorial (int value) 95 { 96 if (value > 1) { 97 value *= factorial (value - 1); 98 } 99 return (value); 100 } |
advance location
until
, but advance
will
not skip over recursive function calls, and the target location doesn't
have to be in the same frame as the current one.
stepi
stepi arg
si
It is often useful to do `display/i $pc' when stepping by machine instructions. This makes GDB automatically display the next instruction to be executed, each time your program stops. See section Automatic Display.
An argument is a repeat count, as in step
.
nexti
nexti arg
ni
An argument is a repeat count, as in next
.
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A signal is an asynchronous event that can happen in a program. The
operating system defines the possible kinds of signals, and gives each
kind a name and a number. For example, in Unix SIGINT
is the
signal a program gets when you type an interrupt character (often Ctrl-c);
SIGSEGV
is the signal a program gets from referencing a place in
memory far away from all the areas in use; SIGALRM
occurs when
the alarm clock timer goes off (which happens only if your program has
requested an alarm).
Some signals, including SIGALRM
, are a normal part of the
functioning of your program. Others, such as SIGSEGV
, indicate
errors; these signals are fatal (they kill your program immediately) if the
program has not specified in advance some other way to handle the signal.
SIGINT
does not indicate an error in your program, but it is normally
fatal so it can carry out the purpose of the interrupt: to kill the program.
GDB has the ability to detect any occurrence of a signal in your program. You can tell GDB in advance what to do for each kind of signal.
Normally, GDB is set up to let the non-erroneous signals like
SIGALRM
be silently passed to your program
(so as not to interfere with their role in the program's functioning)
but to stop your program immediately whenever an error signal happens.
You can change these settings with the handle
command.
info signals
info handle
info signals sig
info handle
is an alias for info signals
.
handle signal [keywords...]
The keywords allowed by the handle
command can be abbreviated.
Their full names are:
nostop
stop
print
keyword as well.
print
noprint
nostop
keyword as well.
pass
noignore
pass
and noignore
are synonyms.
nopass
ignore
nopass
and ignore
are synonyms.
When a signal stops your program, the signal is not visible to the
program until you
continue. Your program sees the signal then, if pass
is in
effect for the signal in question at that time. In other words,
after GDB reports a signal, you can use the handle
command with pass
or nopass
to control whether your
program sees that signal when you continue.
The default is set to nostop
, noprint
, pass
for
non-erroneous signals such as SIGALRM
, SIGWINCH
and
SIGCHLD
, and to stop
, print
, pass
for the
erroneous signals.
You can also use the signal
command to prevent your program from
seeing a signal, or cause it to see a signal it normally would not see,
or to give it any signal at any time. For example, if your program stopped
due to some sort of memory reference error, you might store correct
values into the erroneous variables and continue, hoping to see more
execution; but your program would probably terminate immediately as
a result of the fatal signal once it saw the signal. To prevent this,
you can continue with `signal 0'. See section Giving your Program a Signal.
| [ < ] | [ > ] | [ << ] | [ Up ] | [ >> ] | [Top] | [Contents] | [Index] | [ ? ] |
When your program has multiple threads (see section Debugging Programs with Multiple Threads), you can choose whether to set breakpoints on all threads, or on a particular thread.
break linespec thread threadno
break linespec thread threadno if ...
Use the qualifier `thread threadno' with a breakpoint command to specify that you only want GDB to stop the program when a particular thread reaches this breakpoint. threadno is one of the numeric thread identifiers assigned by GDB, shown in the first column of the `info threads' display.
If you do not specify `thread threadno' when you set a breakpoint, the breakpoint applies to all threads of your program.
You can use the thread
qualifier on conditional breakpoints as
well; in this case, place `thread threadno' before the
breakpoint condition, like this:
(gdb) break frik.c:13 thread 28 if bartab > lim |
Whenever your program stops under GDB for any reason, all threads of execution stop, not just the current thread. This allows you to examine the overall state of the program, including switching between threads, without worrying that things may change underfoot.
There is an unfortunate side effect. If one thread stops for a breakpoint, or for some other reason, and another thread is blocked in a system call, then the system call may return prematurely. This is a consequence of the interaction between multiple threads and the signals that GDB uses to implement breakpoints and other events that stop execution.
To handle this problem, your program should check the return value of each system call and react appropriately. This is good programming style anyways.
For example, do not write code like this:
sleep (10); |
The call to sleep
will return early if a different thread stops
at a breakpoint or for some other reason.
Instead, write this:
int unslept = 10; while (unslept > 0) unslept = sleep (unslept); |
A system call is allowed to return early, so the system is still conforming to its specification. But GDB does cause your multi-threaded program to behave differently than it would without GDB.
Also, GDB uses internal breakpoints in the thread library to monitor certain events such as thread creation and thread destruction. When such an event happens, a system call in another thread may return prematurely, even though your program does not appear to stop.
Conversely, whenever you restart the program, all threads start
executing. This is true even when single-stepping with commands
like step
or next
.
In particular, GDB cannot single-step all threads in lockstep. Since thread scheduling is up to your debugging target's operating system (not controlled by GDB), other threads may execute more than one statement while the current thread completes a single step. Moreover, in general other threads stop in the middle of a statement, rather than at a clean statement boundary, when the program stops.
You might even find your program stopped in another thread after continuing or even single-stepping. This happens whenever some other thread runs into a breakpoint, a signal, or an exception before the first thread completes whatever you requested.
On some OSes, you can lock the OS scheduler and thus allow only a single thread to run.
set scheduler-locking mode
off
, then there is no
locking and any thread may run at any time. If on
, then only the
current thread may run when the inferior is resumed. The step
mode optimizes for single-stepping. It stops other threads from
"seizing the prompt" by preempting the current thread while you are
stepping. Other threads will only rarely (or never) get a chance to run
when you step. They are more likely to run when you `next' over a
function call, and they are completely free to run when you use commands
like `continue', `until', or `finish'. However, unless another
thread hits a breakpoint during its timeslice, they will never steal the
GDB prompt away from the thread that you are debugging.
show scheduler-locking
| [ << ] | [ >> ] | [Top] | [Contents] | [Index] | [ ? ] |
Please send FSF & GNU inquiries & questions to<EMAIL_ADDRESS>There are also other ways to contact the FSF.
These pages are maintained by the GDB developers.
Copyright Free Software Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111, USA.
Verbatim copying and distribution of this entire article is permitted in any medium, provided this notice is preserved.
This document was generated by GDB Administrator on March, 27 2008 using texi2html


Mischelaneous or common.
Bases: object
How these priority flags are interpreted depends largely on the operation (since that’s where these are checked).
| Property | Description |
|---|---|
| DEFAULT | Use the default_priority set in the Scheduler |
| LAST, | |
| NOPRIO | Allways scheduler the operation/coroutine at the end of the queue |
| CORO | Favor the coroutine - if it’s the case. |
| OP | Favor the operation - if it’s the case. |
| FIRST, | |
| PRIO | Allways schedule with priority |


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I am a developer who is extremely passionate about building awesome web application or software. My goal is to make the world a better place with well-engineered software. As I am super excited about learning the latest trends in Software Development. In my spare time, I always tried to constantly learn new technologies to keep myself in the game. Recently, I decided to start writing blogs about some trending technologies that I have learned before and hopefully, people will learn a thing or two when reading it. If you would like to see my blog. Please go to here. Enjoy! Also, check out my GitHub account to see what I have been working on! PoAn (Baron) Chen GitHub account


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If you contribute Research to Production tutorials, you'll get the following benefits:
To view the topics the community wants Research to Production tutorials for, see the issues with the WishList tag in the Research GitHub repository. If you find a topic you want to create a tutorial for, make a pull request to the repository with your tutorial and we will review it.
To request new tutorial topics, contact us.


Explanation:
Explanation:
Discover the cosmos! Since June 16, 1995, each day of our fascinating universe is featured, along with a brief explanation written by a professional astronomer.
About image permissions: All the images on the APOD page are credited to the owner or institution where they originated. Some of the images are copyrighted to use these pcitures publicly or commercially one must write to the owners for permission. For the copyrighted images, the copyright owner is identified in the APOD credit line (please see the copyright owener name afther the explanation). NASA images are in the public domain, official guidelines for their use can be found here.


Tom Barrett, Milwaukee mayor, blames Trump for acid attack on Hispanic
by Jessica ChasmarMilwaukee Mayor Tom Barrett on Monday blamed President Trump’s anti-illegal immigration rhetoric after a Peruvian-American resident was allegedly the victim of an acid attack.
A 61-year-old man was arrested by Milwaukee police after Friday’s attack that allegedly stemmed from an argument over a parking spot. The victim, Mahud Villalaz, told police his attacker told him to “go back to your country” before throwing acid in his face, causing second-degree burns.
Mr. Villalaz said he believes he is the victim of a hate crime and Mr. Barrett agreed that’s “obviously” the case.
“This type of racial verbal attack and now physical attack is condoned in the highest level of governments in our country,” the mayor said, Wisconsin Public Radio reported.  And by his followers. And what we saw over the weekend is a manifestation of that anger.”
Clifton Blackwell, 61, was arrested in connection with the attack Saturday. Charges will be brought forward to the district attorney’s office in the next couple of days, police said.
Meanwhile, a GoFundMe page to cover Mr. Villalaz’s medical bills has fetched nearly $40,000.
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Third Week of RC
Day 2: EmoReply
March 5, 2019
Before starting at the Recurse Center, I knew that I wanted to work on multiple projects. I'm a big believer in productive procrastination. (I'm also a big believer in a paradigm of fruitfulness, rather than productivity, but that's a topic for a different blog.) Productive procrastination means that when I don't feel like working on one thing, or if I'm stuck on a project, I'll work on another project. Then, when I get tired of that project, I return to the earlier project. I frequently find that I'm able to make headway on the first project after taking a break from it.
Though I'm focusing on OpenOversight while at the Recurse Center, I'm also currently working on EmoReply, a project that began as a parody of Gmail's exclamation-mark-laden autoresponses. EmoReply replaces the exclamation marks with tear marks, giving you angst-laden autoreplies.
I'm working on EmoReply with a recurser currently in the second half of his batch, Jamie, who also happens to have more experience with Python than I do. Since I still frequently find myself thinking in Ruby while working in Python, I've appreciated pairing as a way to learn more of Python's fun quirks. Here's a grab-bag of ways that Python differs from Ruby:
- Python doesn't use end statements for methods
- In Python, indentation is required to indicate what block of code a statement belongs to. Not so in Ruby.
- Methods in Python open with a colon, like the below.
- In Ruby, methods look like so, without a colon.
-
In Python, in order to find the length of an array,
sample_object
, you calllen(sample_object)
-
In Ruby, in order to find the length of an array,
sample_object
, you callsample_object.length
def sample_python_method:
def sample_ruby_method


Shoot an email on over to<EMAIL_ADDRESS>Happy to chat side projects, job opportunities, or just about anything else.
Shoot an email on over to<EMAIL_ADDRESS>Happy to chat side projects, job opportunities, or just about anything else.


Currently, GlobalGiving connects with organizations based in the US along with some nonprofits in other countries. However, the process of finding and applying to GlobalGiving remains significantly easier within the United States. In certain countries, factors including lack of internet connectivity and lack of access to documents required by GlobalGiving has led to slower onboarding and discovery of the organization.
Come out to our Product Showcase event to see our team's solution and live demo of the final product!
Event Details:
Sunday, Dec. 9
5PM-6PM
ECEB 2013
Choose ten websites with directories of nonprofits and scrape each individual one and add them to the database. Data includes the organization’s name, country of registration, registration numbers, website url, and email.
Allows user to see all the available scripts, run them, and submit the entries to the global giving database using the organization parser
Aria Malkani
Tech Lead
Roy Chiu
Tech Lead
Skyler Shi
Software Developer
Alan Fang
Software Developer
Pavani Malli
Software Developer
Aryn Harmon
Software Developer
Alan Ren
Software Developer


City Guide: Bag Raiders - Sydney
Bag Raiders take us around Sydney to show off their favorite places to eat, drink and take home with you.
by Ryan MiddletonThe world became reacquainted with Bag Raiders in 2017 when their 2010 hit “Shooting Stars” became one of the most prominent memes of the decade. It was random and strange, but that is how memes work. It also provided the perfect springboard for the band to complete a long-awaited sophomore album Horizons, which was released in September. The breezy album felt like a warm gust of clean air off of the South Australian coast. With the album still ringing true, we asked the Sydney group to welcome us into their city for a City Guide.
They take us around the city for the best places to drink, get some late night food and which clubs are still going strong despite the lock out laws.
Catch bag Raiders at Your Paradise Fiji from December 6-12.
We all like a good drink, so where are the top spots to head to before a night out?
Love Tilly Devine, it’s a small wine bar that also serves up some great small plates so it’s ideal for that post work reset… It’s hidden away in crown lane down the bottom of Darlinghurst near William Street, which is also right around the corner from where we had our first studio! It’s sort of a hole in the wall spot, no fancy rooftop view or anything, so you can just enjoy the drinks/food and company. It’s ace.
Where can you find the best clubs / late night venues in town?
Sydney’s a bit hard at the moment, we’re all waiting to see what the repealing of the lot-out laws means for clubs and live venues. One spot that’s been going strong the whole time and continues to get better is Fredas. Always interesting music and a good crowd.
Brunches are a weekend staple, which spots stand out to you?
Lox Stock and Barrel in Bondi is the one! Brunch or lunch, it’s the best cafe around!
Best dirty late-night street food option?
Aside from the numerous kebab joints, (late night kebab is a must, they are good at that time especially after a few drinks) it can be pretty fun getting a slice of pizza at Frankie's, because you always have the option to not end the night right away hehe.
Your Sunday escape plan when you need to get away from it all?
Definitely by the water. Probably to Nielsen Park in Vaucluse, there’s a good cafe, and a great beach, and you can also do some nature walking with great views of the harbor around there, great place to spend the day.
What is a track that reminds you of your childhood in the city?
Gerling's “Enter Space Capsule.” It’s an absolute classic of a tune, I remember seeing this band at a festival when I was about 15 and they blew me away. It was one of the first shows that piqued a desire to make music with electronic elements that still burns strongly to this day!
What are other great exports that come from Sydney?
A delicious beer brewed by a company that goes by the name of Young Henry’s.
A gift you can’t leave Sydney without taking home for friends?
A big tin of milo. It is the greatest thing that ever happened to milk.


Inner City Toxicants and Neurodevelopmental Impairment
EPA Grant Number: R827039Center: Mount Sinai Center for Children's Environmental Health and Disease Prevention Research
Center Director: Wolff, Mary S.
Title: Inner City Toxicants and Neurodevelopmental Impairment
Investigators: Wolff, Mary S.
Institution: Mount Sinai School of Medicine
EPA Project Officer: Callan, Richard
Project Period: August 1, 1998 through July 31, 2003 (Extended to July 31, 2004)
Project Amount: $3,136,392
RFA: Centers for Children's Environmental Health and Disease Prevention Research (1998) RFA Text | Recipients Lists
Research Category: Children's Health , Health Effects , Human Health , Health
Objective:
Environmental Toxicants and Neuro-Developmental Impairment in Inner City Children is the unifying scientific theme of the Mount Sinai Center for Children's Environmental Health and Disease Prevention Research. This Center resides within the Department of Community and Preventive Medicine, in the Division of Environmental Health Science.
Children living in poverty in inner-city communities suffer some of the heaviest exposures to environmental toxicants in the United States. The goals of the Mount Sinai Center for Children's Environmental Health and Disease Prevention Research are (1) to identify linkages between environmental toxicants and neuro-developmental dysfunction in inner-city children; (2) to elucidate the pathogenic mechanisms by which environmental toxicants can cause developmental impairment; and (3) to prevent neuro-developmental dysfunction of environmental origin in urban children.
The research and prevention programs of the Center will focus on a range of neurodevelopmental toxicants encountered in the inner city: (1) pesticides-legal insecticides such as chlorpyrifos, and illegal "street" pesticides such as methyl Darathion. tres pasitos and tiza china; (2) polychlorinated biphenyls (PCBs); and (3) lead. Patterns of exposure to these toxicants will be assessed. Adverse developmental outcomes will be examined through epidemiological studies and will include loss of intelligence, delayed attainment of developmental milestones, alteration of behavior and diminished life achievement; potential linkages of these problems to environmental exposures will be studied and etiologic mechanisms elucidated. New aDDroaches to prevention will be evaluated.
The Center includes five interdisciplinary research projects that link epidemiological and basic biological research at the Mount Sinai Medical Center and the New York Academy of Medicine's Center of Urban Epidemiologic Studies with the Boriken Neighborhood Health Center, with the East Harlem Community Health Committee and with an extensive network of community-based organizations in East Harlem.
Journal Articles: 25 Displayed | Download in RIS Format
| Other center views: | All 32 publications | 26 publications in selected types | All 25 journal articles |
|---|
| Type | Citation | ||
|---|---|---|---|
|
|
Berkowitz GS, Wolff MS, Matte T, Susser E, Landrigan PJ. The rationale for a national prospective cohort study of environmental exposure and childhood development. Environmental Research 2001;85(2):59-68. |
R827039 (2002) R827039C004 (2002) |
Exit Exit |
|
|
Berkowitz GS, Obel J, Deych E, Lapinski R, Godbold J, Liu Z, Landrigan PJ, Wolff MS. Exposure to indoor pesticides during pregnancy in a multiethnic, urban cohort. Environmental Health Perspectives 2003;111(1):79-84. |
R827039 (2002) R827039C004 (2002) R831711 (2004) R831711 (2005) R831711 (2006) R831711 (2007) R831711 (Final) R831711C001 (2006) R831711C002 (2006) R831711C003 (2006) |
Exit |
|
|
Brenner B. Implementing a community intervention program for health promotion. Social Work in Health Care 2002;35(1-2):359-379. |
R827039 (2002) |
Exit |
|
|
Carpenter DO, Chew FT, Damstra T, Lam LH, Landrigan PJ, Makalinao I, Peralta GL, Suk WA. Environmental threats to the health of children:the Asian perspective. Environmental Health Perspectives 2000;108(10):989-992. |
R827039 (2002) |
Exit |
|
|
Chen J, Germer S, Higuchi R, Berkowitz G, Godbold J, Wetmur JG. Kinetic polymerase chain reaction on pooled DNA:a high-throughput, high-efficiency alternative in genetic epidemiological studies. Cancer Epidemiology, Biomarkers & Prevention 2002;11(1):131-136. |
R827039 (2002) R827039C001 (2002) |
Exit Exit |
|
|
Claudio L, Torres T, Sanjurjo E, Sherman L, Landrigan PJ. Environmental health sciences education-a tool for achieving environmental equity and protecting children. Environmental Health Perspectives 1998;106(Supplement 3):849-855. |
R827039 (2002) |
|
|
|
Erichsen HC, Engel SAM, Eck PK, Welch R, Yeager M, Levine M, Siega-Riz AM, Olshan AF, Chanock SJ. Genetic variation in the sodium-dependent vitamin C transporters, SLC23A1, and SLC23A2 and risk for preterm delivery. American Journal of Epidemiology 2006;163(3):245-254. |
R827039 (2002) |
Exit Exit Exit |
|
|
Flores G, Fuentes-Afflick E, Barbot O, Carter-Pokras O, Claudio L. The health of Latino children: urgent priorities, unanswered questions, and a research agenda. Journal of the American Medical Association 2002;288(1):82-90. |
R827039 (2002) |
Exit |
|
|
Forman J, Moline J, Cernichiari E, Sayegh S, Torres J, Landrigan M, Hudson J, Adel H, Landrigan P. A cluster of pediatric metallic mercury cases tracked with meso-2,3-Dimercaptosuccinic acid (DMSA). Environmental Health Perspectives 2000;108(6):575-577. |
R827039 (2002) |
|
|
|
Gore AC. Environmental toxicant effects on neuroendocrine function. Endocrine 2001;14(2):235-246. |
R827039 (2002) R827039C002 (2002) |
|
|
|
Gore AC. Organochlorine pesticides directly regulate gonadotropin-releasing hormone gene expression and biosynthesis in the GT1-7 hypothalamic cell line. Molecular and Cellular Endocrinology 2002;192(1-2):157-170. |
R827039 (2002) R827039C002 (2002) |
|
|
|
Gore AC, Wu TJ, Oung T, Lee JB, Woller MJ. A novel mechanism for endocrine-disrupting effects of polychlorinated biphenyls: direct effects on gonadotropin-releasing hormone neurones. Journal of Neuroendocrinology 2002;14(10):814-823. |
R827039 (2002) R827039C002 (2002) |
|
|
|
Landrigan PJ, Suk WA, Amler RW. Chemical wastes, children's health, and the Superfund Basic Research Program. Environmental Health Perspectives 1999;107(6):423-427. |
R827039 (2002) |
|
|
|
Landrigan PJ, Claudio L, Markowitz SB, Berkowitz GS, Brenner BL, Romero H, Wetmur JG, Matte TD, Gore AC, Godbold JH, Wolff MS. Pesticides and inner-city children:exposures, risks, and prevention. Environmental Health Perspectives 1999;107(Supplement 3):431-437. |
R827039 (2002) R827039C002 (2002) R827039C003 (2000) |
Exit |
|
|
Landrigan PJ. Pediatric lead poisoning: is there a threshold? (Commentary). Public Health Reports 2000;115(6):530-531. |
R827039 (2002) |
not available |
|
|
Landrigan PJ. Children's environmental health. Lessons from the past and prospects for the future. Pediatric Clinics of North America 2001;48(5):1319-1330. |
R827039 (2002) |
Exit |
|
|
Landrigan PJ, Schechter CB, Lipton JM, Fahs MC, Schwartz J. Environmental pollutants and disease in American children:estimates of morbidity, mortality, and costs for lead poisoning, asthma, cancer, and developmental disabilities. Environmental Health Perspectives 2002;110(7):721-728. |
R827039 (2002) |
Exit |
|
|
Landrigan PJ. The worldwide problem of lead in petrol. (Editorial). Bulletin of the World Health Organization 2002;80(10):768. |
R827039 (2002) |
Exit |
|
|
Landrigan P. Pesticides and polychlorinated biphenyls (PCBs):an analysis of the evidence that they impair children’s neurobehavioral development. Molecular Genetics and Metabolism 2001;73(1):11-17. |
R827039 (2002) |
|
|
|
Salama J, Chakraborty TR, Ng L, Gore AC. Effects of polychlorinated biphenyls on estrogen receptor-β expression in the anteroventral periventricular nucleus. Environmental Health Perspectives 2003;111(10):1278-1282. |
R827039 (2002) R827039C002 (2002) R831711 (2005) R831711 (2006) R831711 (2007) R831711 (Final) R831711C001 (2006) R831711C002 (2006) R831711C003 (2006) |
|
|
|
Savitz DA, Ananth CV, Berkowitz GS, Lapinski R. Concordance among measures of pregnancy outcome based on fetal size and duration of gestation. American Journal of Epidemiology 2000;151(6):627-633. |
R827039 (2002) |
Exit |
|
|
Susser EB, Brown A, Matte TD. Prenatal factors and adult mental and physical health. Canadian Journal of Psychiatry 1999;44(4):326-334. |
R827039 (2002) |
Exit |
|
|
Susser E, Matte TD. Early antecedents of adult health. Journal of Urban Health 1998;75(2):236-241. |
R827039 (2002) |
Exit |
|
|
Weiss B, Landrigan P. The developing brain and the environment: an introduction. Environmental Health Perspectives 2000;108(Supplement 3):373-374. |
R827039 (2002) |
|
|
|
Wolff MS, Landrigan PJ. Organochlorine chemicals and children’s health (editorial). Journal of Pediatrics 2002;140(1):10-13. |
R827039 (2002) |
Exit Exit |
Supplemental Keywords:
RFA, Health, Scientific Discipline, Toxics, Epidemiology, pesticides, Risk Assessments, Susceptibility/Sensitive Population/Genetic Susceptibility, Children's Health, genetic susceptability, pesticide exposure, urban air, environmental health, health risks, developmental neurotoxicity, airway disease, environmental risks, lead, PCBs, respiratory problems, developmental lead exposure, children, Human Health Risk Assessment, neurotoxicity, childhood lead exposure, human exposure, susceptibility, children's vulnerablity, assessment of exposure, childhood respiratory disease, neurodevelopmental toxicity, environmentally caused disease, lead exposure, children's environmental health, growth & development, age dependent response, human health riskProgress and Final Reports:
2000 Progress Report2002 Progress Report
Subprojects under this Center: (EPA does not fund or establish subprojects; EPA awards and manages the overall grant for this center).
R827039C001 Growing Up Healthy in East Harlem
R827039C002 Exposure to Indoor Pesticides and PCBs and their Effects on Growth and Neurodevelopment in Urban Children
R827039C003 Genetics of Chlorpyrifos Risk in Minority Populations
R827039C004 Prenatal PCB Exposure and Neurodevelopmental Outcomes in Adolescence and Adulthood
R827039C005 Neuroendocrine Mechanisms of Environmental Toxicants: PCBs and Pesticides


With proper permissions, you have access to some administration tools.
They are :
Display every temporary IP addresses.
In addition to informations on this IP address, you have the user who set it and the end of validity date.
The date is in red if in past.
Display every migrating IP addresses.
In addition to informations on this IP address, you have the user who set it and the date planned for migration.
The date is in red if in past.


What exactly is the DevOps model and what advantages does it bring to your workflow? It’s 2020 and although DevOps is a practice that’s very commonly adopted today, I feel that a not too overly technical explanation of the subject might be beneficial to those individuals, or companies, that are not using it yet but find themselves in a po...
Poor feedback from readers Running this web site since year 2007, I receive some email feedback regarding my articles from readers every month. About 20% of the conversations I get are shocking: They are absolutely horrible in the quality of the ideas and the writing, and they ofte...
The pivot Snapchat never made Snapchat, to me, is one of the most amazing and underrated apps out there. Once upon a time, everyone thought Snapchat will overtake Facebook. That has not happened, however I won't count Snapchat out. Snapchat started its life in September 2011 as a mess...
Giving your first International talk - Recon2019 & BlackHat - Niemand - Cyber Security Introduction I don’t usually write this kind of posts, but after giving my first international talk (YEAHHH!) I would like to share my experience with you since this can be useful to everyone who hasn’t …
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Mads Brodt - Front-end engineer I'm a front-end engineer from Copenhagen. I design, create and support websites and applications for clients and for fun.
How to Be Unpersuasive - Calvin Rosser If you want to be persuasive, spread ideas, and elevate causes, you need to avoid these 5 common mistakes that prevent you from being effective.
Zulip 3.0: Threaded Open Source Team Chat We’re excited to announce the release of Zulip Server 3.0, containing hundreds of new features and bug fixes to help distributed and remote teams stay productive and focused. Zulip is the open-source threaded team chat app, used by thousands of teams glo...
pimbrouwers/Falco A functional-first toolkit for building brilliant ASP.NET Core applications using F#. - pimbrouwers/Falco
When your coworker does great work, tell their manager When your coworker does great work, tell their manager
Twitter Is at Its Best When Verified Accounts Can’t Tweet On Wednesday, a hack involving high-profile Twitter accounts led the service to suspend the activity of verified users. It was great.
Board of Director 2020 Elections - Interviews - Round 1 Join us for short interviews with .NET Foundation Board of Director Candidates. Ask live Q&A. Hosted by: Heather Downing Candidates: Layla Porter, Rainer Stropek, Shawn Wildermuth, Mitchel Sellers View candidates - https://dotnetfoundation.org/about/ele...
Let’s avoid talk of ‘chemical imbalance’: it’s people in distress | Psyche Ideas The ‘chemical imbalance’ trope is appealing but dehumanising, and has heightened stigma towards people with mental illness
Life, part 24 When last we left off we had representations for 0-quads — a single bit — 1-quads — four bits in a row — and 2-quads — a wrapper data structure around an unsigned shor…
I made a robot to cut my hair with scissors My hair is getting too long so I decided to build a robot to cut it for me. To support future projects like this check out my patreon: http://patreon.com/stuffmadehere If you like this project you'll probably like my iPad case that lets you see blindfold...
How SHA-2 Works Step-By-Step (SHA-256) SHA-2 (Secure Hash Algorithm 2), of which SHA-256 is a part, is one of the most popular hashing algorithms out there. In this article, we are going to break dow
Hacking Reolink cameras for fun and profit Dragging Reolink, kicking and screaming, into the light of the open-standards day
The Internet Wasn't Built for Security The Internet wasn’t built for security. But we at Let’s Encrypt are on a mission to build a Web that’s secure by default. Donate $50 or more…
Create: Frontend - A one of a kind live event from Microsoft about all things frontend Grab your coffee or tea and join us for a half-day of conversations with developers from the community on pressing topics for frontend developers, such as building inclusive and accessible web applications, static sites, serverless, and much more. Thi...
Viewing Managed COM Objects Through Native Pointers | Visual Studio Blog This new Visual Studio feature automatically decodes managed COM objects referenced by native pointers allowing you to fully inspect values in the Locals Window.
Systems Performance: Enterprise and the Cloud, 2nd Edition Systems Performance: Enterprise and the Cloud, 2nd Edition (2020)
C# 9 Deep Dive: Target Typing and Covariant Returns In a C# 9 deep dive, we talk about target typing and covariant returns.
Introducing C# Markup for Xamarin.Forms | Xamarin Blog C# Markup for Xamarin.Forms enables developers to seemlessly create user interfaces in C# code with built in markup extensions.
Implementing a Thread Safe Message Queue in C# This article explores a message passing mechanism for safe thread to thread communication
Deploying a .NET Core Blazor App to Netlify using GitHub Actions Part of deploying a brand new site is getting the build process set up. For my new project, BlazorGames.net, I decided to host the site (which is built in Blazor WebAssembly) on Netlify after hearing many good things about that service, and specifically h...
Introduction to Web Programming in F# with Giraffe - Part 1 — Softwarepark In this post we are going to start using Giraffe to create a website with views and an API.
Introduction to Functional Programming in F# - Part 11 — Softwarepark In this post we are going to look at recursion and how to use tail call optimisation in F# to make recursion more efficient..
The July 2020 release of Azure Data Studio is now available - SQL Server Blog The July release of Azure Data Studio is now available. Download Azure Data Studio and review the release notes to get started. Note: After downloading Azure Data Studio, say Yes to enabling preview features so that you can use extensions. Azure Data Stud...
Workshop: KEDA, Scale Your Kubernetes Workload on Your Own Terms - NDC Melbourne 2020 Kubernetes is a powerful platform to host various kind of workloads, and these workloads vary in their need of scale. For that, Kubernetes has a built-in functionality to scale these workloads based on their resources consumption like CPU and memory.
Chief of Staff in Redmond, Washington, United States | Business Programs & Operations at Microsoft Apply for Chief of Staff job with Microsoft in Redmond, Washington, United States. Business Programs & Operations at Microsoft
Walmart Now Requires All Shoppers To Wear Pants U.S.—In a move that's being called "unprecedented tyranny," Walmart is now requiring all shoppers to wear pants in their stores.Americans everywhere slammed Walmart for the move, saying it amounted to an infringement on our constitutio...
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