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sav07_lecture_20 [2007/06/05 19:06] kremena.diatchka old revision restored |
sav07_lecture_20 [2007/06/05 19:22] vkuncak |
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| - must follow protocol: (open (read+write)* close)* | - must follow protocol: (open (read+write)* close)* | ||
| - must follow protocol: (startLog stopLog)* | - must follow protocol: (startLog stopLog)* | ||
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| Line 93: | Line 94: | ||
| $(s, l, c, t)$ | $(s, l, c, t)$ | ||
| - | Here $l \in L$, where $L$ is the set of local variables of a procedure. Everything would be popped off from $l$ when the procedure returns control to the callee. | + | Here $l \in L$, where $L$ is the set of mappings of local variables of a procedure to their values. Furthermore, on each procedure call, the program pushes $l$ on the stack along with the program point. Everything would be popped off from $l$ when the procedure returns control to the callee. |
| One instance where small step semantics would be necessary is in concurrency, so that we can take into account interleaving. | One instance where small step semantics would be necessary is in concurrency, so that we can take into account interleaving. | ||