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[impurity] Track unique accesses

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Summary:
Impurity domain was tracking all changes to variables (with a list of traces that containing all write/invalid accesses). This results in having long traces with multiple access events for the same variable. For instance,

```
 void swap_impure(int[] array, int i, int j) {
    int tmp = array[i];
    array[i] = array[j]; \\ included in the trace
    array[j] = tmp;      \\ included in the trace
  }
```
here we recorded both array accesses.

This diff changes the domain to include accesses so that we only keep track of a single trace per access. Array accesses are only recorded once.

Note that we want to record all unique accesses, not just the first one, because impurity will be used for hoisting/cost where we will invalidate impure arguments and consider all the rest as not changing.

Reviewed By: jvillard

Differential Revision: D20385745

fbshipit-source-id: d3647dad3
master
Ezgi Çiçek 5 years ago committed by Facebook GitHub Bot
parent e3c89b1f10
commit a4c3925d9a
5 changed files with 81 additions and 63 deletions
Show Stats Download Patch File Download Diff File

92
infer/src/checkers/impurity.ml
Unescape View File

@ -12,12 +12,13 @@ open PulseDomainInterface
let debug fmt = L.(debug Analysis Verbose fmt) let debug fmt = L.(debug Analysis Verbose fmt)
let get_matching_dest_addr_opt ~edges_pre ~edges_post : AbstractValue.t list option = let get_matching_dest_addr_opt ~edges_pre ~edges_post :
(BaseMemory.Access.t * AbstractValue.t) list option =
match match
List.fold2 ~init:(Some []) List.fold2 ~init:(Some [])
~f:(fun acc (_, (addr_dest_pre, _)) (_, (addr_dest_post, _)) -> ~f:(fun acc (access, (addr_dest_pre, _)) (_, (addr_dest_post, _)) ->
if AbstractValue.equal addr_dest_pre addr_dest_post then if AbstractValue.equal addr_dest_pre addr_dest_post then
Option.map acc ~f:(fun acc -> addr_dest_pre :: acc) Option.map acc ~f:(fun acc -> (access, addr_dest_pre) :: acc)
else None ) else None )
(BaseMemory.Edges.bindings edges_pre) (BaseMemory.Edges.bindings edges_pre)
(BaseMemory.Edges.bindings edges_post) (BaseMemory.Edges.bindings edges_post)
@ -29,7 +30,19 @@ let get_matching_dest_addr_opt ~edges_pre ~edges_post : AbstractValue.t list opt
x x
let add_invalid_and_modified ~check_empty attrs acc = let ignore_array_index (access : BaseMemory.Access.t) : unit HilExp.Access.t =
match access with
| ArrayAccess (typ, _) ->
ArrayAccess (typ, ())
| FieldAccess fname ->
FieldAccess fname
| Dereference ->
Dereference
| TakeAddress ->
TakeAddress
let add_invalid_and_modified ~var ~access ~check_empty attrs acc : ImpurityDomain.ModifiedVarSet.t =
let modified = let modified =
Attributes.get_written_to attrs Attributes.get_written_to attrs
|> Option.value_map ~default:[] ~f:(fun modified -> [ImpurityDomain.WrittenTo modified]) |> Option.value_map ~default:[] ~f:(fun modified -> [ImpurityDomain.WrittenTo modified])
@ -43,46 +56,47 @@ let add_invalid_and_modified ~check_empty attrs acc =
in in
if check_empty && List.is_empty invalid_and_modified then if check_empty && List.is_empty invalid_and_modified then
L.(die InternalError) "Address is modified without being written to or invalidated." L.(die InternalError) "Address is modified without being written to or invalidated."
else invalid_and_modified @ acc else
List.fold_left ~init:acc
~f:(fun acc trace ->
ImpurityDomain.ModifiedVarSet.add {var; access= ignore_array_index access; trace} acc )
invalid_and_modified
let add_to_modified var addr pre_heap post acc = let add_to_modified ~var ~access ~addr pre_heap post modified_vars =
let rec aux acc ~addr_to_explore ~visited : ImpurityDomain.trace list = let rec aux modified_vars ~addr_to_explore ~visited : ImpurityDomain.ModifiedVarSet.t =
match addr_to_explore with match addr_to_explore with
| [] -> | [] ->
acc modified_vars
| addr :: addr_to_explore -> ( | (access, addr) :: addr_to_explore -> (
if AbstractValue.Set.mem addr visited then aux acc ~addr_to_explore ~visited if AbstractValue.Set.mem addr visited then aux modified_vars ~addr_to_explore ~visited
else else
let edges_pre_opt = BaseMemory.find_opt addr pre_heap in let edges_pre_opt = BaseMemory.find_opt addr pre_heap in
let cell_post_opt = BaseDomain.find_cell_opt addr post in let cell_post_opt = BaseDomain.find_cell_opt addr post in
let visited = AbstractValue.Set.add addr visited in let visited = AbstractValue.Set.add addr visited in
match (edges_pre_opt, cell_post_opt) with match (edges_pre_opt, cell_post_opt) with
| None, None -> | None, None ->
aux acc ~addr_to_explore ~visited aux modified_vars ~addr_to_explore ~visited
| Some _, None -> | Some _, None ->
L.(die InternalError) L.(die InternalError)
"It is unexpected to have an address which has a binding in pre but not in post!" "It is unexpected to have an address which has a binding in pre but not in post!"
| None, Some (_, attrs_post) -> | None, Some (_, attrs_post) ->
aux aux
(add_invalid_and_modified ~check_empty:false attrs_post acc) (add_invalid_and_modified ~var ~access ~check_empty:false attrs_post modified_vars)
~addr_to_explore ~visited ~addr_to_explore ~visited
| Some edges_pre, Some (edges_post, attrs_post) -> ( | Some edges_pre, Some (edges_post, attrs_post) -> (
match get_matching_dest_addr_opt ~edges_pre ~edges_post with match get_matching_dest_addr_opt ~edges_pre ~edges_post with
| Some addr_list -> | Some addr_list ->
aux aux
(add_invalid_and_modified attrs_post ~check_empty:false acc) (add_invalid_and_modified ~var ~access attrs_post ~check_empty:false
modified_vars)
~addr_to_explore:(addr_list @ addr_to_explore) ~visited ~addr_to_explore:(addr_list @ addr_to_explore) ~visited
| None -> | None ->
aux aux
(add_invalid_and_modified ~check_empty:true attrs_post acc) (add_invalid_and_modified ~var ~access ~check_empty:true attrs_post modified_vars)
~addr_to_explore ~visited ) ) ~addr_to_explore ~visited ) )
in in
match aux [] ~addr_to_explore:[addr] ~visited:AbstractValue.Set.empty with aux modified_vars ~addr_to_explore:[(access, addr)] ~visited:AbstractValue.Set.empty
| [] ->
acc
| hd :: tl ->
ImpurityDomain.ModifiedVarSet.add {var; trace_list= (hd, tl)} acc
let get_modified_params pname post_stack pre_heap post formals = let get_modified_params pname post_stack pre_heap post formals =
@ -93,15 +107,35 @@ let get_modified_params pname post_stack pre_heap post formals =
match BaseMemory.find_opt addr pre_heap with match BaseMemory.find_opt addr pre_heap with
| Some edges_pre -> | Some edges_pre ->
BaseMemory.Edges.fold BaseMemory.Edges.fold
(fun _ (addr, _) acc -> add_to_modified var addr pre_heap post acc) (fun access (addr, _) acc -> add_to_modified ~var ~access ~addr pre_heap post acc)
edges_pre acc edges_pre acc
| None -> | None ->
debug "The address is not materialized in pre-heap." ; debug "The address is not materialized in in pre-heap." ;
acc ) acc )
| _ -> | _ ->
acc ) acc )
let get_modified_globals pre_heap post post_stack =
BaseStack.fold
(fun var (addr, _) modified_globals ->
if Var.is_global var then
(* since global vars are rooted in the stack, we don't have
access here but we still want to pick up changes to
globals. *)
add_to_modified ~var ~access:HilExp.Access.Dereference ~addr pre_heap post modified_globals
else modified_globals )
post_stack ImpurityDomain.ModifiedVarSet.empty
let is_modeled_pure tenv pname =
match PurityModels.ProcName.dispatch tenv pname with
| Some callee_summary ->
PurityDomain.is_pure callee_summary
| None ->
false
(** Given Pulse summary, extract impurity info, i.e. parameters and global variables that are (** Given Pulse summary, extract impurity info, i.e. parameters and global variables that are
modified by the function and skipped functions. *) modified by the function and skipped functions. *)
let extract_impurity tenv pdesc pre_post : ImpurityDomain.t = let extract_impurity tenv pdesc pre_post : ImpurityDomain.t =
@ -112,23 +146,11 @@ let extract_impurity tenv pdesc pre_post : ImpurityDomain.t =
let modified_params = let modified_params =
Procdesc.get_formals pdesc |> get_modified_params pname post_stack pre_heap post Procdesc.get_formals pdesc |> get_modified_params pname post_stack pre_heap post
in in
let modified_globals = let modified_globals = get_modified_globals pre_heap post post_stack in
BaseStack.fold
(fun var (addr, _) acc ->
if Var.is_global var then add_to_modified var addr pre_heap post acc else acc )
post_stack ImpurityDomain.ModifiedVarSet.empty
in
let is_modeled_pure pname =
match PurityModels.ProcName.dispatch tenv pname with
| Some callee_summary ->
PurityDomain.is_pure callee_summary
| None ->
false
in
let skipped_calls = let skipped_calls =
AbductiveDomain.extract_skipped_calls pre_post AbductiveDomain.extract_skipped_calls pre_post
|> PulseAbductiveDomain.SkippedCalls.filter (fun proc_name _ -> |> PulseAbductiveDomain.SkippedCalls.filter (fun proc_name _ ->
Purity.should_report proc_name && not (is_modeled_pure proc_name) ) Purity.should_report proc_name && not (is_modeled_pure tenv proc_name) )
in in
{modified_globals; modified_params; skipped_calls} {modified_globals; modified_params; skipped_calls}

11
infer/src/checkers/impurityDomain.ml
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@ -13,9 +13,8 @@ type trace = WrittenTo of PulseTrace.t | Invalid of (PulseInvalidation.t * Pulse
[@@deriving compare] [@@deriving compare]
module ModifiedVar = struct module ModifiedVar = struct
type nonempty_action_type = trace * trace list [@@deriving compare] type t = {var: Var.t; access: unit HilExp.Access.t; trace: trace [@compare.ignore]}
[@@deriving compare]
type t = {var: Var.t; trace_list: nonempty_action_type} [@@deriving compare]
let pp fmt {var} = F.fprintf fmt "@\n %a @\n" Var.pp var let pp fmt {var} = F.fprintf fmt "@\n %a @\n" Var.pp var
end end
@ -61,8 +60,7 @@ let pp_param_source fmt = function
F.pp_print_string fmt "global variable" F.pp_print_string fmt "global variable"
let add_to_errlog ~nesting param_source ModifiedVar.{var; trace_list} errlog = let add_to_errlog ~nesting param_source ModifiedVar.{var; trace} errlog =
let aux ~nesting errlog trace =
match trace with match trace with
| WrittenTo access_trace -> | WrittenTo access_trace ->
PulseTrace.add_to_errlog ~include_value_history:false ~nesting PulseTrace.add_to_errlog ~include_value_history:false ~nesting
@ -75,6 +73,3 @@ let add_to_errlog ~nesting param_source ModifiedVar.{var; trace_list} errlog =
F.fprintf fmt "%a `%a` %a here" pp_param_source param_source Var.pp var F.fprintf fmt "%a `%a` %a here" pp_param_source param_source Var.pp var
PulseInvalidation.describe invalidation ) PulseInvalidation.describe invalidation )
invalidation_trace errlog invalidation_trace errlog
in
let first_trace, rest = trace_list in
List.fold_left rest ~init:(aux ~nesting errlog first_trace) ~f:(aux ~nesting)

7
infer/src/checkers/impurityDomain.mli
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@ -9,9 +9,10 @@ open! IStd
type trace = WrittenTo of PulseTrace.t | Invalid of (PulseInvalidation.t * PulseTrace.t) type trace = WrittenTo of PulseTrace.t | Invalid of (PulseInvalidation.t * PulseTrace.t)
module ModifiedVar : sig module ModifiedVar : sig
type nonempty_action_type = trace * trace list type t =
{ var: Var.t
type t = {var: Var.t; trace_list: nonempty_action_type} ; access: unit HilExp.Access.t (** accesses that are oblivious to modified array indices *)
; trace: trace }
end end
module ModifiedVarSet : sig module ModifiedVarSet : sig

4
infer/tests/codetoanalyze/cpp/impurity/issues.exp
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@ -3,13 +3,13 @@
../../facebook-clang-plugins/clang/install/include/c++/v1/iterator, std::operator!=<A_*>, 0, IMPURE_FUNCTION, no_bucket, ERROR, [Impure function std::operator!=<A_*>,when calling `std::operator==<A_*,_A_*>` here,parameter `__x` modified here,when calling `std::operator==<A_*,_A_*>` here,parameter `__y` modified here] ../../facebook-clang-plugins/clang/install/include/c++/v1/iterator, std::operator!=<A_*>, 0, IMPURE_FUNCTION, no_bucket, ERROR, [Impure function std::operator!=<A_*>,when calling `std::operator==<A_*,_A_*>` here,parameter `__x` modified here,when calling `std::operator==<A_*,_A_*>` here,parameter `__y` modified here]
../../facebook-clang-plugins/clang/install/include/c++/v1/iterator, std::operator!=<int_*>, 0, IMPURE_FUNCTION, no_bucket, ERROR, [Impure function std::operator!=<int_*>,when calling `std::operator==<int_*,_int_*>` here,parameter `__x` modified here,when calling `std::operator==<int_*,_int_*>` here,parameter `__y` modified here] ../../facebook-clang-plugins/clang/install/include/c++/v1/iterator, std::operator!=<int_*>, 0, IMPURE_FUNCTION, no_bucket, ERROR, [Impure function std::operator!=<int_*>,when calling `std::operator==<int_*,_int_*>` here,parameter `__x` modified here,when calling `std::operator==<int_*,_int_*>` here,parameter `__y` modified here]
codetoanalyze/cpp/impurity/array_test.cpp, alias_mod_impure, 0, IMPURE_FUNCTION, no_bucket, ERROR, [Impure function alias_mod_impure,parameter `array` modified here] codetoanalyze/cpp/impurity/array_test.cpp, alias_mod_impure, 0, IMPURE_FUNCTION, no_bucket, ERROR, [Impure function alias_mod_impure,parameter `array` modified here]
codetoanalyze/cpp/impurity/array_test.cpp, array_mod_both_impure, 0, IMPURE_FUNCTION, no_bucket, ERROR, [Impure function array_mod_both_impure,parameter `a` modified here,parameter `a` modified here] codetoanalyze/cpp/impurity/array_test.cpp, array_mod_both_impure, 0, IMPURE_FUNCTION, no_bucket, ERROR, [Impure function array_mod_both_impure,parameter `a` modified here]
codetoanalyze/cpp/impurity/array_test.cpp, array_mod_impure, 0, IMPURE_FUNCTION, no_bucket, ERROR, [Impure function array_mod_impure,parameter `b` modified here,parameter `a` modified here] codetoanalyze/cpp/impurity/array_test.cpp, array_mod_impure, 0, IMPURE_FUNCTION, no_bucket, ERROR, [Impure function array_mod_impure,parameter `b` modified here,parameter `a` modified here]
codetoanalyze/cpp/impurity/array_test.cpp, call_array_mod_impure, 0, IMPURE_FUNCTION, no_bucket, ERROR, [Impure function call_array_mod_impure,when calling `array_mod_impure` here,parameter `a` modified here] codetoanalyze/cpp/impurity/array_test.cpp, call_array_mod_impure, 0, IMPURE_FUNCTION, no_bucket, ERROR, [Impure function call_array_mod_impure,when calling `array_mod_impure` here,parameter `a` modified here]
codetoanalyze/cpp/impurity/array_test.cpp, modify_direct_impure, 0, IMPURE_FUNCTION, no_bucket, ERROR, [Impure function modify_direct_impure,parameter `array` modified here] codetoanalyze/cpp/impurity/array_test.cpp, modify_direct_impure, 0, IMPURE_FUNCTION, no_bucket, ERROR, [Impure function modify_direct_impure,parameter `array` modified here]
codetoanalyze/cpp/impurity/array_test.cpp, modify_ptr_impure, 0, IMPURE_FUNCTION, no_bucket, ERROR, [Impure function modify_ptr_impure,parameter `array` modified here] codetoanalyze/cpp/impurity/array_test.cpp, modify_ptr_impure, 0, IMPURE_FUNCTION, no_bucket, ERROR, [Impure function modify_ptr_impure,parameter `array` modified here]
codetoanalyze/cpp/impurity/global_test.cpp, call_modify_global, 0, IMPURE_FUNCTION, no_bucket, ERROR, [Impure function call_modify_global,when calling `modify_global_array_impure` here,global variable `a` modified here,when calling `modify_global_primitive_impure` here,global variable `x` modified here] codetoanalyze/cpp/impurity/global_test.cpp, call_modify_global, 0, IMPURE_FUNCTION, no_bucket, ERROR, [Impure function call_modify_global,when calling `modify_global_array_impure` here,global variable `a` modified here,when calling `modify_global_primitive_impure` here,global variable `x` modified here]
codetoanalyze/cpp/impurity/global_test.cpp, local_static_var_impure, 0, IMPURE_FUNCTION, no_bucket, ERROR, [Impure function local_static_var_impure,global variable `local_static_var_impure.arr` modified here,global variable `local_static_var_impure.arr` modified here] codetoanalyze/cpp/impurity/global_test.cpp, local_static_var_impure, 0, IMPURE_FUNCTION, no_bucket, ERROR, [Impure function local_static_var_impure,global variable `local_static_var_impure.arr` modified here]
codetoanalyze/cpp/impurity/global_test.cpp, modify_global_array_impure, 0, IMPURE_FUNCTION, no_bucket, ERROR, [Impure function modify_global_array_impure,global variable `a` modified here] codetoanalyze/cpp/impurity/global_test.cpp, modify_global_array_impure, 0, IMPURE_FUNCTION, no_bucket, ERROR, [Impure function modify_global_array_impure,global variable `a` modified here]
codetoanalyze/cpp/impurity/global_test.cpp, modify_global_inside_lamda_impure::lambda_global_test.cpp:33:14::operator(), 0, IMPURE_FUNCTION, no_bucket, ERROR, [Impure function modify_global_inside_lamda_impure::lambda_global_test.cpp:33:14::operator(),global variable `x` modified here] codetoanalyze/cpp/impurity/global_test.cpp, modify_global_inside_lamda_impure::lambda_global_test.cpp:33:14::operator(), 0, IMPURE_FUNCTION, no_bucket, ERROR, [Impure function modify_global_inside_lamda_impure::lambda_global_test.cpp:33:14::operator(),global variable `x` modified here]
codetoanalyze/cpp/impurity/global_test.cpp, modify_global_primitive_impure, 0, IMPURE_FUNCTION, no_bucket, ERROR, [Impure function modify_global_primitive_impure,global variable `x` modified here] codetoanalyze/cpp/impurity/global_test.cpp, modify_global_primitive_impure, 0, IMPURE_FUNCTION, no_bucket, ERROR, [Impure function modify_global_primitive_impure,global variable `x` modified here]

6
infer/tests/codetoanalyze/java/impurity/issues.exp
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@ -9,8 +9,8 @@ codetoanalyze/java/impurity/Localities.java, Localities.copy_ref_impure(int[],in
codetoanalyze/java/impurity/Localities.java, Localities.get_array_impure(Localities$Foo[],int,Localities$Foo):Localities$Foo[], 0, IMPURE_FUNCTION, no_bucket, ERROR, [Impure function Localities$Foo[] Localities.get_array_impure(Localities$Foo[],int,Localities$Foo),parameter `array` modified here] codetoanalyze/java/impurity/Localities.java, Localities.get_array_impure(Localities$Foo[],int,Localities$Foo):Localities$Foo[], 0, IMPURE_FUNCTION, no_bucket, ERROR, [Impure function Localities$Foo[] Localities.get_array_impure(Localities$Foo[],int,Localities$Foo),parameter `array` modified here]
codetoanalyze/java/impurity/Localities.java, Localities.get_f_impure(Localities$Foo[],int,Localities$Foo):Localities$Foo, 0, IMPURE_FUNCTION, no_bucket, ERROR, [Impure function Localities$Foo Localities.get_f_impure(Localities$Foo[],int,Localities$Foo),parameter `array` modified here] codetoanalyze/java/impurity/Localities.java, Localities.get_f_impure(Localities$Foo[],int,Localities$Foo):Localities$Foo, 0, IMPURE_FUNCTION, no_bucket, ERROR, [Impure function Localities$Foo Localities.get_f_impure(Localities$Foo[],int,Localities$Foo),parameter `array` modified here]
codetoanalyze/java/impurity/Localities.java, Localities.get_foo_via_tmp_impure(Localities$Foo[],int,Localities$Foo,Localities$Foo):Localities$Bar, 0, IMPURE_FUNCTION, no_bucket, ERROR, [Impure function Localities$Bar Localities.get_foo_via_tmp_impure(Localities$Foo[],int,Localities$Foo,Localities$Foo),parameter `array` modified here] codetoanalyze/java/impurity/Localities.java, Localities.get_foo_via_tmp_impure(Localities$Foo[],int,Localities$Foo,Localities$Foo):Localities$Bar, 0, IMPURE_FUNCTION, no_bucket, ERROR, [Impure function Localities$Bar Localities.get_foo_via_tmp_impure(Localities$Foo[],int,Localities$Foo,Localities$Foo),parameter `array` modified here]
codetoanalyze/java/impurity/Localities.java, Localities.incrementAll_impure(java.util.ArrayList):void, 0, IMPURE_FUNCTION, no_bucket, ERROR, [Impure function void Localities.incrementAll_impure(ArrayList),when calling `void Localities$Foo.inc_impure()` here,parameter `list` modified here,when calling `void Localities$Foo.inc_impure()` here,parameter `list` modified here,when calling `void Localities$Foo.inc_impure()` here,parameter `list` modified here] codetoanalyze/java/impurity/Localities.java, Localities.incrementAll_impure(java.util.ArrayList):void, 0, IMPURE_FUNCTION, no_bucket, ERROR, [Impure function void Localities.incrementAll_impure(ArrayList),when calling `void Localities$Foo.inc_impure()` here,parameter `list` modified here]
codetoanalyze/java/impurity/Localities.java, Localities.makeAllZero_impure(java.util.ArrayList):void, 0, IMPURE_FUNCTION, no_bucket, ERROR, [Impure function void Localities.makeAllZero_impure(ArrayList),parameter `list` modified here,parameter `list` modified here,parameter `list` modified here] codetoanalyze/java/impurity/Localities.java, Localities.makeAllZero_impure(java.util.ArrayList):void, 0, IMPURE_FUNCTION, no_bucket, ERROR, [Impure function void Localities.makeAllZero_impure(ArrayList),parameter `list` modified here]
codetoanalyze/java/impurity/Localities.java, Localities.modify_first_el_impure(java.util.ArrayList):void, 0, IMPURE_FUNCTION, no_bucket, ERROR, [Impure function void Localities.modify_first_el_impure(ArrayList),parameter `list` modified here] codetoanalyze/java/impurity/Localities.java, Localities.modify_first_el_impure(java.util.ArrayList):void, 0, IMPURE_FUNCTION, no_bucket, ERROR, [Impure function void Localities.modify_first_el_impure(ArrayList),parameter `list` modified here]
codetoanalyze/java/impurity/Localities.java, Localities.modify_via_call_impure(java.util.ArrayList):void, 0, IMPURE_FUNCTION, no_bucket, ERROR, [Impure function void Localities.modify_via_call_impure(ArrayList),when calling `void Localities$Foo.inc_impure()` here,parameter `list` modified here] codetoanalyze/java/impurity/Localities.java, Localities.modify_via_call_impure(java.util.ArrayList):void, 0, IMPURE_FUNCTION, no_bucket, ERROR, [Impure function void Localities.modify_via_call_impure(ArrayList),when calling `void Localities$Foo.inc_impure()` here,parameter `list` modified here]
codetoanalyze/java/impurity/Localities.java, Localities.newHashCode_impure():int, 0, IMPURE_FUNCTION, no_bucket, ERROR, [Impure function int Localities.newHashCode_impure(),call to skipped function int Object.hashCode() occurs here] codetoanalyze/java/impurity/Localities.java, Localities.newHashCode_impure():int, 0, IMPURE_FUNCTION, no_bucket, ERROR, [Impure function int Localities.newHashCode_impure(),call to skipped function int Object.hashCode() occurs here]
@ -31,5 +31,5 @@ codetoanalyze/java/impurity/Test.java, Test.global_array_set_impure(int,int):voi
codetoanalyze/java/impurity/Test.java, Test.local_field_write_impure(Test):void, 0, IMPURE_FUNCTION, no_bucket, ERROR, [Impure function void Test.local_field_write_impure(Test),parameter `x` modified here] codetoanalyze/java/impurity/Test.java, Test.local_field_write_impure(Test):void, 0, IMPURE_FUNCTION, no_bucket, ERROR, [Impure function void Test.local_field_write_impure(Test),parameter `x` modified here]
codetoanalyze/java/impurity/Test.java, Test.parameter_field_write_impure(Test,boolean):void, 0, IMPURE_FUNCTION, no_bucket, ERROR, [Impure function void Test.parameter_field_write_impure(Test,boolean),parameter `test` modified here] codetoanalyze/java/impurity/Test.java, Test.parameter_field_write_impure(Test,boolean):void, 0, IMPURE_FUNCTION, no_bucket, ERROR, [Impure function void Test.parameter_field_write_impure(Test,boolean),parameter `test` modified here]
codetoanalyze/java/impurity/Test.java, Test.set_impure(int,int):void, 0, IMPURE_FUNCTION, no_bucket, ERROR, [Impure function void Test.set_impure(int,int),parameter `this` modified here] codetoanalyze/java/impurity/Test.java, Test.set_impure(int,int):void, 0, IMPURE_FUNCTION, no_bucket, ERROR, [Impure function void Test.set_impure(int,int),parameter `this` modified here]
codetoanalyze/java/impurity/Test.java, Test.swap_impure(int[],int,int):void, 0, IMPURE_FUNCTION, no_bucket, ERROR, [Impure function void Test.swap_impure(int[],int,int),parameter `array` modified here,parameter `array` modified here] codetoanalyze/java/impurity/Test.java, Test.swap_impure(int[],int,int):void, 0, IMPURE_FUNCTION, no_bucket, ERROR, [Impure function void Test.swap_impure(int[],int,int),parameter `array` modified here]
codetoanalyze/java/impurity/Test.java, Test.systemNanoTime_impure():long, 0, IMPURE_FUNCTION, no_bucket, ERROR, [Impure function long Test.systemNanoTime_impure(),call to skipped function long System.nanoTime() occurs here] codetoanalyze/java/impurity/Test.java, Test.systemNanoTime_impure():long, 0, IMPURE_FUNCTION, no_bucket, ERROR, [Impure function long Test.systemNanoTime_impure(),call to skipped function long System.nanoTime() occurs here]

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