fb16dfecae
Commit b7f05445c0 has added WWW entries to port Makefiles based on
WWW: lines in pkg-descr files.
This commit removes the WWW: lines of moved-over URLs from these
pkg-descr files.
Approved by: portmgr (tcberner)
22 lines
1.1 KiB
Text
22 lines
1.1 KiB
Text
The primary goal of this project is to define a portable and efficient C
|
|
programming interface (API) to determine the call-chain of a program. The API
|
|
additionally provides the means to manipulate the preserved (callee-saved) state
|
|
of each call-frame and to resume execution at any point in the call-chain
|
|
(non-local goto). The API supports both local (same-process) and remote
|
|
(across-process) operation. As such, the API is useful in a number of
|
|
applications. Some examples include:
|
|
|
|
- exception handling
|
|
The libunwind API makes it trivial to implement the stack-manipulation aspects
|
|
of exception handling.
|
|
- debuggers
|
|
The libunwind API makes it trivial for debuggers to generate the call-chain
|
|
(backtrace) of the threads in a running program.
|
|
- introspection
|
|
It is often useful for a running thread to determine its call-chain. For
|
|
example, this is useful to display error messages (to show how the error came
|
|
about) and for performance monitoring/analysis.
|
|
- efficient setjmp()
|
|
With libunwind, it is possible to implement an extremely efficient version of
|
|
setjmp(). Effectively, the only context that needs to be saved consists of the
|
|
stack-pointer(s).
|