llvm-cov: Handle missing source files as GCOV does
If the source files referenced by a gcno file are missing, gcov
outputs a coverage file where every line is simply /*EOF*/. This also
occurs for lines in the coverage that are past the end of a file that
is found.
This change mimics gcov.
llvm-svn: 208149
diff --git a/llvm/test/tools/llvm-cov/Inputs/test_missing.cpp.gcov b/llvm/test/tools/llvm-cov/Inputs/test_missing.cpp.gcov
new file mode 100644
index 0000000..1c138e4
--- /dev/null
+++ b/llvm/test/tools/llvm-cov/Inputs/test_missing.cpp.gcov
@@ -0,0 +1,77 @@
+ -: 0:Source:srcdir/./nested_dir/../test.cpp
+ -: 0:Graph:test_paths.gcno
+ -: 0:Data:test_paths.gcda
+ -: 0:Runs:3
+ -: 0:Programs:1
+ -: 1:/*EOF*/
+ -: 2:/*EOF*/
+ -: 3:/*EOF*/
+ -: 4:/*EOF*/
+ -: 5:/*EOF*/
+ -: 6:/*EOF*/
+ -: 7:/*EOF*/
+ -: 8:/*EOF*/
+ -: 9:/*EOF*/
+12884901888: 10:/*EOF*/
+ -: 11:/*EOF*/
+ #####: 12:/*EOF*/
+ -: 13:/*EOF*/
+ -: 14:/*EOF*/
+ #####: 15:/*EOF*/
+ -: 16:/*EOF*/
+ -: 17:/*EOF*/
+ -: 18:/*EOF*/
+ 3: 19:/*EOF*/
+ 3: 20:/*EOF*/
+ -: 21:/*EOF*/
+ -: 22:/*EOF*/
+ -: 23:/*EOF*/
+ #####: 24:/*EOF*/
+ #####: 25:/*EOF*/
+ -: 26:/*EOF*/
+ -: 27:/*EOF*/
+ 12: 28:/*EOF*/
+ 12: 29:/*EOF*/
+ 12: 30:/*EOF*/
+ -: 31:/*EOF*/
+ -: 32:/*EOF*/
+ 21: 33:/*EOF*/
+ 36: 34:/*EOF*/
+ 18: 35:/*EOF*/
+ 3: 36:/*EOF*/
+ -: 37:/*EOF*/
+ -: 38:/*EOF*/
+ 3: 39:/*EOF*/
+ -: 40:/*EOF*/
+ 3: 41:/*EOF*/
+ 3: 42:/*EOF*/
+ 3: 43:/*EOF*/
+ 3: 44:/*EOF*/
+ 3: 45:/*EOF*/
+ 3: 46:/*EOF*/
+ #####: 47:/*EOF*/
+ #####: 48:/*EOF*/
+ -: 49:/*EOF*/
+ -: 50:/*EOF*/
+ 66: 51:/*EOF*/
+ 30: 52:/*EOF*/
+ -: 53:/*EOF*/
+ 6: 54:/*EOF*/
+ 6: 55:/*EOF*/
+ -: 56:/*EOF*/
+ -: 57:/*EOF*/
+ 3: 58:/*EOF*/
+ 3: 59:/*EOF*/
+ -: 60:/*EOF*/
+ 9: 61:/*EOF*/
+ 9: 62:/*EOF*/
+ -: 63:/*EOF*/
+ 12: 64:/*EOF*/
+ 12: 65:/*EOF*/
+ 30: 66:/*EOF*/
+ -: 67:/*EOF*/
+ 3: 68:/*EOF*/
+25769803782: 69:/*EOF*/
+12884901888: 70:/*EOF*/
+ -: 71:/*EOF*/
+ 3: 72:/*EOF*/
diff --git a/llvm/test/tools/llvm-cov/Inputs/test_missing.h.gcov b/llvm/test/tools/llvm-cov/Inputs/test_missing.h.gcov
new file mode 100644
index 0000000..d500e86
--- /dev/null
+++ b/llvm/test/tools/llvm-cov/Inputs/test_missing.h.gcov
@@ -0,0 +1,6 @@
+ -: 0:Source:srcdir/./nested_dir/../test.h
+ -: 0:Graph:test_paths.gcno
+ -: 0:Data:test_paths.gcda
+ -: 0:Runs:3
+ -: 0:Programs:1
+ 6: 1:/*EOF*/
diff --git a/llvm/test/tools/llvm-cov/Inputs/test_missing.output b/llvm/test/tools/llvm-cov/Inputs/test_missing.output
new file mode 100644
index 0000000..ada0c36
--- /dev/null
+++ b/llvm/test/tools/llvm-cov/Inputs/test_missing.output
@@ -0,0 +1,8 @@
+File 'srcdir/./nested_dir/../test.h'
+Lines executed:100.00% of 1
+srcdir/./nested_dir/../test.h:creating 'test.h.gcov'
+
+File 'srcdir/./nested_dir/../test.cpp'
+Lines executed:84.21% of 38
+srcdir/./nested_dir/../test.cpp:creating 'test.cpp.gcov'
+
diff --git a/llvm/test/tools/llvm-cov/llvm-cov.test b/llvm/test/tools/llvm-cov/llvm-cov.test
index 8f57d9a..2345f8d 100644
--- a/llvm/test/tools/llvm-cov/llvm-cov.test
+++ b/llvm/test/tools/llvm-cov/llvm-cov.test
@@ -34,6 +34,12 @@
# With gcov output disabled
RUN: llvm-cov -n test.c | diff -u test_no_output.output -
+# Missing source files. This test is fragile, as it depends on being
+# run before we copy some sources into place in the next test.
+RUN: llvm-cov test_paths.cpp 2>/dev/null | diff -u test_missing.output -
+RUN: diff -aub test_missing.cpp.gcov test.cpp.gcov
+RUN: diff -aub test_missing.h.gcov test.h.gcov
+
# Preserve paths. This mangles the output filenames.
RUN: mkdir -p %t/srcdir/nested_dir
RUN: cp test.cpp test.h %t/srcdir