[buck] delete results dir inside buck-out in infer children processes

Summary:
The infer results directories in buck-out/ are "cleaned up" to avoid polluting
the Buck cache with too much data or non-deterministic data. In particular, the
runstate is deleted, which confused subsequent infer processes trying to read
the pre-existing results directory.

Add a special case in infer to delete pre-existing results directories in
buck-out instead of trying to load their state.

Reviewed By: mbouaziz

Differential Revision: D6845128

fbshipit-source-id: 5c716aa

.gitignore

@@ -26,6 +26,7 @@ duplicates.txt
 *.ast.sh
 *.ast.bdump
 *.ast.biniou
+/infer/tests/build_systems/buck_flavors_diff/src/hello.c
 /infer/tests/build_systems/codetoanalyze/ndk-build/hello_app/libs/
 /infer/tests/build_systems/codetoanalyze/ndk-build/hello_app/obj/
 /infer/tests/build_systems/codetoanalyze/utf8_*n_pwd
@@ -38,8 +39,6 @@ duplicates.txt
 /infer/tests/build_systems/codetoanalyze/xcodebuild/simple_app/build/
 /infer/tests/build_systems/differential_*/**/*.class
 /infer/tests/build_systems/differential_*/**/Diff*.java
-/infer/tests/build_systems/differential_*/infer-current
-/infer/tests/build_systems/differential_*/infer-previous
 /infer/tests/build_systems/diff/src
 /infer/tests/build_systems/diff_*/src
 /infer/tests/build_systems/buck_flavors_deterministic/capture_hash-*.sha

infer/src/backend/infer.ml

@@ -35,11 +35,14 @@ let setup () =
       ResultsDir.remove_results_dir () ; ResultsDir.create_results_dir ()
   | Capture | Compile | Run ->
       let driver_mode = Lazy.force Driver.mode_from_command_line in
-      if not
-           ( Driver.(equal_mode driver_mode Analyze)
-           ||
-           Config.(buck || continue_capture || infer_is_clang || infer_is_javac || reactive_mode)
-           )
+      if Config.(
+           (* In Buck mode, delete infer-out directories inside buck-out to start fresh and to
+              avoid getting errors because some of their contents is missing (removed by
+              [Driver.clean_results_dir ()]). *)
+           buck && flavors)
+         || not
+              ( Driver.(equal_mode driver_mode Analyze)
+              || Config.(continue_capture || infer_is_clang || infer_is_javac || reactive_mode) )
       then ResultsDir.remove_results_dir () ;
       ResultsDir.create_results_dir ()
   | Explore ->

infer/tests/build_systems/buck_flavors_diff/.inferconfig

@@ -0,0 +1 @@
+{}

infer/tests/build_systems/buck_flavors_diff/Makefile

@@ -0,0 +1,55 @@
+# Copyright (c) 2017 - 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.
+
+TESTS_DIR = ../..
+INFER_OUT = infer-out
+include $(TESTS_DIR)/differential.make
+
+DIFFERENTIAL_ARGS = --differential-filter-files changed_files.txt
+
+include ../../differential.make
+
+BUCK_TARGET = //src:hello
+INFER_OPTIONS = $(DIFFERENTIAL_ARGS) --flavors --reactive --debug-exceptions
+SRC_DIR = $(CURDIR)/../codetoanalyze
+
+.PHONY: compare_reports
+compare_reports: current.exp.test previous.exp.test
+	$(QUIET)$(call check_no_diff,current.exp,current.exp.test)
+	$(QUIET)$(call check_no_diff,previous.exp,previous.exp.test)
+
+.PHONY: replace_reports
+replace_reports: current.exp.test previous.exp.test
+	$(COPY) current.exp.test current.exp
+	$(COPY) previous.exp.test previous.exp
+
+current.exp.test: $(CURRENT_REPORT)
+	$(QUIET)$(INFER_BIN) report -o $(<D) \
+		--from-json-report $(CURRENT_DIR)/report.json \
+		--issues-tests current.exp.test
+
+previous.exp.test: $(PREVIOUS_REPORT)
+	$(QUIET)$(INFER_BIN) report -o $(<D) \
+		--from-json-report $(PREVIOUS_DIR)/report.json \
+		--issues-tests previous.exp.test
+
+test: compare_reports
+print: current.exp.test previous.exp.test
+replace: replace_reports
+
+$(CURRENT_REPORT):
+	$(QUIET)$(REMOVE_DIR) buck-out
+	$(QUIET)$(COPY) $(SRC_DIR)/some_bugs.c src/hello.c
+	$(QUIET)$(call silent_on_success,Running Buck diff analysis: current,\
+	  $(INFER_BIN) $(INFER_OPTIONS) run --results-dir $(CURRENT_DIR) -- \
+	  $(BUCK) build --no-cache $(BUCK_TARGET))
+
+$(PREVIOUS_REPORT):
+	$(QUIET)$(COPY) $(SRC_DIR)/some_different_bugs.c src/hello.c
+	$(QUIET)$(call silent_on_success,Running Buck diff analysis: previous,\
+	  $(INFER_BIN) $(INFER_OPTIONS) run --results-dir $(PREVIOUS_DIR) -- \
+	  $(BUCK) build --no-cache $(BUCK_TARGET))

infer/tests/build_systems/buck_flavors_diff/changed_files.txt

@@ -0,0 +1 @@
+src/hello.c

infer/tests/build_systems/buck_flavors_diff/current.exp

@@ -0,0 +1,3 @@
+src/hello.c, test1, 2, NULL_DEREFERENCE, [start of procedure test1()]
+src/hello.c, test2, 2, NULL_DEREFERENCE, [start of procedure test2(),start of procedure nullify()]
+src/hello2.c, test_hello2, 2, NULL_DEREFERENCE, [start of procedure test_hello2()]

infer/tests/build_systems/buck_flavors_diff/fixed.exp

@@ -0,0 +1 @@
+MEMORY_LEAK, src/hello.c, test3, 3, test3.8ad8757baa8564dc136c1e07507f4a98, test3

infer/tests/build_systems/buck_flavors_diff/introduced.exp

@@ -0,0 +1 @@
+NULL_DEREFERENCE, src/hello.c, test2, 2, test2.ad0234829205b9033196ba818f7a872b, test2

infer/tests/build_systems/buck_flavors_diff/preexisting.exp

@@ -0,0 +1 @@
+NULL_DEREFERENCE, src/hello.c, test1, 2, test1.5a105e8b9d40e1329780d62ea2265d8a, test1

infer/tests/build_systems/buck_flavors_diff/previous.exp

@@ -0,0 +1,3 @@
+src/hello.c, test1, 2, NULL_DEREFERENCE, [start of procedure test1()]
+src/hello.c, test3, 3, MEMORY_LEAK, [start of procedure test3(),Condition is true]
+src/hello2.c, test_hello2, 2, NULL_DEREFERENCE, [start of procedure test_hello2()]

infer/tests/build_systems/buck_flavors_diff/src/BUCK

@@ -0,0 +1,6 @@
+cxx_library(
+  name = 'hello',
+  srcs = [
+    'hello.c', 'hello2.c',
+  ],
+)

infer/tests/build_systems/buck_flavors_diff/src/hello2.c

@@ -0,0 +1,15 @@
+/*
+ * Copyright (c) 2017 - 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.
+ */
+
+#include <stdlib.h>
+
+void test_hello2() {
+  int* s = NULL;
+  *s = 42;
+}

infer/tests/build_systems/buck_flavors_run/Makefile

@@ -10,7 +10,7 @@ ROOT_DIR = $(TESTS_DIR)/../..
 
 ANALYZER = checkers
 BUCK_TARGET = //src:hello
-SOURCES = $(wildcard src/hello.c)
+SOURCES = src/hello.c src/hello2.c
 OBJECTS = buck-out/gen/src/hello\#compile-hello.c.o1f717d69,default/hello.c.o
 INFER_OPTIONS = --report-custom-error --developer-mode --project-root $(TESTS_DIR)
 INFERPRINT_OPTIONS = --project-root $(TESTS_DIR) --issues-tests
@@ -18,7 +18,7 @@ CLEAN_EXTRA = buck-out
 
 include $(TESTS_DIR)/infer.make
 
-$(OBJECTS): $(JAVA_SOURCE_FILES)
+$(OBJECTS): $(SOURCES)
 	$(QUIET)$(call silent_on_success,Compiling Buck flavors tests,\
 	NO_BUCKD=1 $(BUCK) build --no-cache $(BUCK_TARGET))
 

infer/tests/differential.make

@@ -15,8 +15,8 @@ EXPECTED_TEST_OUTPUT = introduced.exp.test
 INFERPRINT_ISSUES_FIELDS = \
 	"bug_type,file,procedure,line_offset,procedure_id,procedure_id_without_crc"
 
-CURRENT_DIR = infer-current
-PREVIOUS_DIR = infer-previous
+CURRENT_DIR = infer-out-current
+PREVIOUS_DIR = infer-out-previous
 CURRENT_REPORT = $(CURRENT_DIR)/report.json
 PREVIOUS_REPORT = $(PREVIOUS_DIR)/report.json