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25 lines
1.2 KiB
Plaintext
25 lines
1.2 KiB
Plaintext
The primary goal of this project is to define a portable and efficient
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C programming interface (API) to determine the call-chain of a program.
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The API additionally provides the means to manipulate the preserved
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(callee-saved) state of each call-frame and to resume execution at any
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point in the call-chain (non-local goto). The API supports both local
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(same-process) and remote (across-process) operation. As such, the API
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is useful in a number of applications. Some examples include:
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o exception handling
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The libunwind API makes it trivial to implement the stack-manipulation
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aspects of exception handling.
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o debuggers
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The libunwind API makes it trivial for debuggers to generate
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the call-chain (backtrace) of the threads in a running program.
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o introspection
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It is often useful for a running thread to determine its call-chain.
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For example, this is useful to display error messages (to show how
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the error came about) and for performance monitoring/analysis.
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o efficient setjmp()
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With libunwind, it is possible to implement an extremely efficient
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version of setjmp(). Effectively, the only context that needs to be
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saved consists of the stack-pointer(s).
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WWW: http://www.nongnu.org/libunwind/
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