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Ezgi Çiçek 5a2b285fff [pulse] Distinguish exit state at top level ... Summary: This diff lifts the `PulseAbductiveDomain.t` in `PulseExecutionState` by tracking whether the program continues the analysis normally or exits unusually (e.g. by calling `exit` or `throw`): ``` type exec_state = | ContinueProgram of PulseAbductiveDomain.t (** represents the state at the program point *) | ExitProgram of PulseAbductiveDomain.t (** represents the state originating at exit/divergence. *) ``` Now, Pulse's actual domain is tracked by `PulseExecutionState` and as soon as we try to analyze an instruction at `ExitProgram`, we simply return its state. The aim is to recover the state at the time of the exit, rather than simply ignoring them (i.e. returning empty disjuncts). This allows us to get rid of some FNs that we were not able to detect before. Moreover, it also allows the impurity analysis to be more precise since we will know how the state changed up to exit. TODO: - Impurity analysis needs to be improved to consider functions that simply exit as impure. - The next goal is to handle error state similarly so that when pulse finds an error, we recover the state at the error location (and potentially continue to analyze?). Disclaimer: currently, we handle throw statements like exit (as was the case before). However, this is not correct. Ideally, control flow from throw nodes follows catch nodes rather than exiting the program entirely. Reviewed By: jvillard Differential Revision: D20791747 fbshipit-source-id: df9e5445a		5 years ago
..
Makefile	[pulse][impurity] Use pulse for detecting impurity	5 years ago
array_test.cpp	[impurity] Consider functions with empty pulse summary as impure	5 years ago
exit_test.cpp	[pulse] Distinguish exit state at top level	5 years ago
global_test.cpp	[pulse][impurity] Use pulse for detecting impurity	5 years ago
invalid_test.cpp	[impurity] Start checking equivalence at materialized addresses in pre	5 years ago
issues.exp	[pulse][impurity] Add model for System.exit()	5 years ago
param_test.cpp	[pulse][impurity] Use pulse for detecting impurity	5 years ago
struct_test.cpp	[pulse] Only propagate existing WrittenTo attributes at function calls	5 years ago
unmodeled.cpp	[impurity] Rely on set of skipped functions to determine impurity	5 years ago
vector.cpp	[pulse] havoc formals passed by reference to unknown procedures	5 years ago