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第一个Hello,OS World操作系统 - 操作系统(内核) - 清泛网 - 专注C/C++及内核技术
...的debug命令如下：
b 0x... 断点命令，指定地址处调试
info break 显示当前断点信息
c 继续执行
s 步入执行
n 单步执行
info cpu 查看cpu寄存器（可分别执行 r/fp/sreg/creg）
print-stack 打印堆栈
xp /长度 地址 显示地址处...
What is the meaning of the term arena in relation to memory?
...
From http://www.bozemanpass.com/info/linux/malloc/Linux_Heap_Contention.html:
The libc.so.x shared library contains the glibc component and the heap
code resides inside it. The current implementation of the heap uses
multiple independent sub-heaps c...
How do I get my Maven Integration tests to run
...as part of pre-integration phase, jetty server starts. Last log line is : [INFO] Started Jetty Server. After that, nothing happens. It gets stuck. maven surefire failsafe plugin doesn't execute tests nor jetty server stops. Any idea what's wrong? I am using same configuration as specified by you.
...
Get Root Directory Path of a PHP project
... with the CGI specification that PATH_TRANSLATED should only exist if PATH_INFO is defined. Apache 2 users may use AcceptPathInfo = On inside httpd.conf to define PATH_INFO
source:
php.net/manual
share
|
...
Upgrade python in a virtualenv
...b/python2.7/site-packages/pip
rm -r lib/python2.7/site-packages/pip-*.dist-info
rm -r lib/python2.7/site-packages/setuptools
rm -r lib/python2.7/site-packages/setuptools-*.dist-info
Finally, re-create your virtual environment:
virtualenv <EXISTING_ENV_PATH>
By doing so, old Python core fi...
How to move files from one git repo to another (not a clone), preserving history
...E_TO_KEEP$ |
GIT_INDEX_FILE=$GIT_INDEX_FILE.new \
git update-index --index-info && \
mv $GIT_INDEX_FILE.new $GIT_INDEX_FILE || echo "Nothing to do"' --prune-empty -- --all
# eg. FILE_TO_KEEP = pom.xml to keep only the pom.xml file from FOLDER_TO_KEEP
Stage Two
Cleanup step
git reset --...
Accurate way to measure execution times of php scripts
...our code: $time = microtime(true) - $_SERVER["REQUEST_TIME_FLOAT"]; (More info in an answer below.)
– ashleedawg
Apr 2 '19 at 20:56
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show ...
How do you check that a number is NaN in JavaScript?
... of the following:
For ECMAScript-5 Users:
#1
if(x !== x) {
console.info('x is NaN.');
}
else {
console.info('x is NOT a NaN.');
}
For people using ECMAScript-6:
#2
Number.isNaN(x);
And For consistency purpose across ECMAScript 5 & 6 both, we can also use this polyfill for Number...
Enable binary mode while restoring a Database from an SQL dump
...l like so:
mysqldump -u root p my_db --no-data --no-create-db --no-create-info --routines --triggers --skip-opt --set-gtid-purged=OFF > db_objects.sql
What I did was change it to this (pipe instead to Set-Content):
mysqldump -u root p my_db --no-data --no-create-db --no-create-info --routines...
Explain ExtJS 4 event handling
...);
},
....
onStationStart: function(station) {
console.info('I called to inform you that the Station controller select box just has been changed');
console.info('Now what do you want to do next?');
},
}
If the selectbox has been changed we now fire the function onSt...