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[threadsafety] De-duplicate the reports

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Summary: Report at most one read/write race or unprotected write per access path per method

Reviewed By: sblackshear, jvillard

Differential Revision: D4590815

fbshipit-source-id: 3c3a9d9
master
Peter O'Hearn 8 years ago committed by Facebook Github Bot
parent 040140ba52
commit c080cbb60f
3 changed files with 95 additions and 13 deletions
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40
infer/src/checkers/ThreadSafety.ml
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@ -772,12 +772,20 @@ let combine_conditional_unconditional_writes conditional_writes unconditional_wr
conditional_writes
unconditional_writes
let conflicting_accesses (sink1 : ThreadSafetyDomain.TraceElem.t)
let equal_accesses (sink1 : ThreadSafetyDomain.TraceElem.t)
(sink2 : ThreadSafetyDomain.TraceElem.t) =
AccessPath.equal_access_list
(snd (ThreadSafetyDomain.TraceElem.kind sink1))
(snd (ThreadSafetyDomain.TraceElem.kind sink2))
(* For now equal-access and conflicting-access are equivalent.
But that will change when we (soon) consider conficting accesses
that are not via assignment, such as add and get for containers*)
let conflicting_accesses (sink1 : ThreadSafetyDomain.TraceElem.t)
(sink2 : ThreadSafetyDomain.TraceElem.t) =
equal_accesses sink1 sink2
(* trace is really reads or writes set. Fix terminology later *)
let filter_conflicting_sinks sink trace =
let conflicts =
@ -792,8 +800,8 @@ let filter_conflicting_sinks sink trace =
write accesses*)
let collect_conflicting_writes sink tab =
let procs_and_writes =
IList.map
(fun (key,(_, _, conditional_writes, unconditional_writes, _)) ->
List.map
~f:(fun (key,(_, _, conditional_writes, unconditional_writes, _)) ->
let conflicting_writes =
combine_conditional_unconditional_writes
conditional_writes unconditional_writes
@ -809,7 +817,28 @@ let collect_conflicting_writes sink tab =
)
procs_and_writes
(*A helper function used int he error reporting*)
(* keep only the first copy of an access per procedure *)
let de_dup trace =
let original_sinks = ThreadSafetyDomain.PathDomain.sinks trace in
let list_of_original_sinks = ThreadSafetyDomain.PathDomain.Sinks.elements original_sinks in
let de_duped_sinks =
ThreadSafetyDomain.PathDomain.Sinks.filter
(fun sink ->
(* for each sink we will keep one in the equivalence class of those
with same access path. We select that by using find_exn to get
the first element equivalent ot sink in a list of sinks. This
first element is the dedup representative, and it happens to
typically be the first such access in a method. *)
let first_sink =
List.find_exn
~f:(fun sink2 -> equal_accesses sink sink2)
list_of_original_sinks in
Int.equal (ThreadSafetyDomain.TraceElem.compare sink first_sink) 0
)
original_sinks in
ThreadSafetyDomain.PathDomain.update_sinks trace de_duped_sinks
(*A helper function used in the error reporting*)
let pp_accesses_sink fmt sink =
let _, accesses = ThreadSafetyDomain.PathDomain.Sink.kind sink in
AccessPath.pp_access_list fmt accesses
@ -846,7 +875,7 @@ let report_thread_safety_violations ( _, tenv, pname, pdesc) make_description tr
IList.iter
report_one_path
(PathDomain.get_reportable_sink_paths trace ~trace_of_pname)
(PathDomain.get_reportable_sink_paths (de_dup trace) ~trace_of_pname)
let make_unprotected_write_description
@ -879,7 +908,6 @@ let make_read_write_race_description tenv pname final_sink_site initial_sink_sit
conflicts_description
(calculate_addendum_message tenv pname)
(* find those elements of reads which have conflicts
somewhere else, and report them *)
let report_reads proc_env reads tab =

50
infer/tests/codetoanalyze/java/threadsafety/DeDup.java
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@ -0,0 +1,50 @@
/*
* Copyright (c) 2016 - present Facebook, Inc.
* All rights reserved.
*
* This source code is licensed under the BSD style license found in the
* LICENSE file in the root directory of this source tree. An additional grant
* of patent rights can be found in the PATENTS file in the same directory.
*/
package codetoanalyze.java.checkers;
import javax.annotation.concurrent.ThreadSafe;
@ThreadSafe
class DeDup{
Integer field;
/*Only the first write should be reported*/
void two_writes(){
field = 22;
field = 84;
}
/*Only the first read should be reported*/
void two_reads(){ //parallel reads are OK
Integer local;
local = field;
local = field+1;
}
/*Both accesses should be reported*/
void write_read(){ //parallel reads are OK
Integer local;
field = 87;
local = field;
}
/*Should only report the first write, which happens to be interprocedural*/
void twoWritesOneInCaller() {
writeToField();
field = 22;
}
/*Should not report directly as provate method*/
private void writeToField() {
field = 33;
}
}

6
infer/tests/codetoanalyze/java/threadsafety/issues.exp
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@ -26,6 +26,11 @@ codetoanalyze/java/threadsafety/Containers.java, void Containers.mapPutAllBad(Ma
codetoanalyze/java/threadsafety/Containers.java, void Containers.mapPutBad(String,String), 1, THREAD_SAFETY_VIOLATION, [access to codetoanalyze.java.checkers.Containers.mMap.put]
codetoanalyze/java/threadsafety/Containers.java, void Containers.mapRemoveBad(String), 1, THREAD_SAFETY_VIOLATION, [access to codetoanalyze.java.checkers.Containers.mMap.remove]
codetoanalyze/java/threadsafety/Containers.java, void Containers.mapSubclassWriteBad(HashMap,String), 1, THREAD_SAFETY_VIOLATION, [access to remove]
codetoanalyze/java/threadsafety/DeDup.java, void DeDup.twoWritesOneInCaller(), 1, THREAD_SAFETY_VIOLATION, [call to void DeDup.writeToField(),access to codetoanalyze.java.checkers.DeDup.field]
codetoanalyze/java/threadsafety/DeDup.java, void DeDup.two_reads(), 2, THREAD_SAFETY_VIOLATION, [access to codetoanalyze.java.checkers.DeDup.field]
codetoanalyze/java/threadsafety/DeDup.java, void DeDup.two_writes(), 1, THREAD_SAFETY_VIOLATION, [access to codetoanalyze.java.checkers.DeDup.field]
codetoanalyze/java/threadsafety/DeDup.java, void DeDup.write_read(), 2, THREAD_SAFETY_VIOLATION, [access to codetoanalyze.java.checkers.DeDup.field]
codetoanalyze/java/threadsafety/DeDup.java, void DeDup.write_read(), 3, THREAD_SAFETY_VIOLATION, [access to codetoanalyze.java.checkers.DeDup.field]
codetoanalyze/java/threadsafety/Locks.java, void Locks.FP_unlockOneLock(), 4, THREAD_SAFETY_VIOLATION, [access to codetoanalyze.java.checkers.Locks.f]
codetoanalyze/java/threadsafety/Locks.java, void Locks.afterReentrantLockUnlockBad(), 3, THREAD_SAFETY_VIOLATION, [access to codetoanalyze.java.checkers.Locks.f]
codetoanalyze/java/threadsafety/Locks.java, void Locks.afterUnlockBad(), 3, THREAD_SAFETY_VIOLATION, [access to codetoanalyze.java.checkers.Locks.f]
@ -53,7 +58,6 @@ codetoanalyze/java/threadsafety/ThreadSafeExample.java, void ThreadSafeExample.c
codetoanalyze/java/threadsafety/ThreadSafeExample.java, void ThreadSafeExample.callVisibleForTestingBad(), 1, THREAD_SAFETY_VIOLATION, [call to void ThreadSafeExample.visibleForTestingNotPublicOk(),access to codetoanalyze.java.checkers.ThreadSafeExample.f]
codetoanalyze/java/threadsafety/ThreadSafeExample.java, void ThreadSafeExample.deeperTraceBad(), 1, THREAD_SAFETY_VIOLATION, [call to void ThreadSafeExample.callAssignInPrivateMethod(),call to void ThreadSafeExample.assignInPrivateMethodOk(),access to codetoanalyze.java.checkers.ThreadSafeExample.f]
codetoanalyze/java/threadsafety/ThreadSafeExample.java, void ThreadSafeExample.oddBad(), 1, THREAD_SAFETY_VIOLATION, [call to void ThreadSafeExample.evenOk(),access to codetoanalyze.java.checkers.ThreadSafeExample.f]
codetoanalyze/java/threadsafety/ThreadSafeExample.java, void ThreadSafeExample.recursiveBad(), 1, THREAD_SAFETY_VIOLATION, [access to codetoanalyze.java.checkers.ThreadSafeExample.f]
codetoanalyze/java/threadsafety/ThreadSafeExample.java, void ThreadSafeExample.recursiveBad(), 2, THREAD_SAFETY_VIOLATION, [call to void ThreadSafeExample.recursiveBad(),access to codetoanalyze.java.checkers.ThreadSafeExample.f]
codetoanalyze/java/threadsafety/ThreadSafeExample.java, void ThreadSafeExample.tsBad(), 1, THREAD_SAFETY_VIOLATION, [access to codetoanalyze.java.checkers.ThreadSafeExample.f]
codetoanalyze/java/threadsafety/ThreadSafeExample.java, void YesThreadSafeExtendsNotThreadSafeExample.subsubmethodBad(), 1, THREAD_SAFETY_VIOLATION, [access to codetoanalyze.java.checkers.YesThreadSafeExtendsNotThreadSafeExample.subsubfield]

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