merge(third_party/git): Merge squashed git subtree at v2.23.0 r/373

Merge commit '1b593e1ea4d2af0f6444d9a7788d5d99abd6fde5' as 'third_party/git'

4 files changed, 220 insertions, 0 deletions

diff --git a/third_party/git/t/valgrind/.gitignore b/third_party/git/t/valgrind/.gitignore
new file mode 100644
index 000000000000..d4ae6676d159
--- /dev/null
+++ b/third_party/git/t/valgrind/.gitignore
@@ -0,0 +1,2 @@
+/bin/
+/templates
diff --git a/third_party/git/t/valgrind/analyze.sh b/third_party/git/t/valgrind/analyze.sh
new file mode 100755
index 000000000000..2ffc80f72105
--- /dev/null
+++ b/third_party/git/t/valgrind/analyze.sh
@@ -0,0 +1,127 @@
+#!/bin/sh
+
+# Get TEST_OUTPUT_DIRECTORY from GIT-BUILD-OPTIONS if it's there...
+. "$(dirname "$0")/../../GIT-BUILD-OPTIONS"
+# ... otherwise set it to the default value.
+: ${TEST_OUTPUT_DIRECTORY=$(dirname "$0")/..}
+
+output=
+count=0
+total_count=0
+missing_message=
+new_line='
+'
+
+# start outputting the current valgrind error in $out_prefix.++$count,
+# and the test case which failed in the corresponding .message file
+start_output () {
+	test -z "$output" || return
+
+	# progress
+	total_count=$(($total_count+1))
+	test -t 2 && printf "\rFound %d errors" $total_count >&2
+
+	count=$(($count+1))
+	output=$out_prefix.$count
+	: > $output
+
+	echo "*** $1 ***" > $output.message
+}
+
+finish_output () {
+	test ! -z "$output" || return
+	output=
+
+	# if a test case has more than one valgrind error, we need to
+	# copy the last .message file to the previous errors
+	test -z "$missing_message" || {
+		while test $missing_message -lt $count
+		do
+			cp $out_prefix.$count.message \
+				$out_prefix.$missing_message.message
+			missing_message=$(($missing_message+1))
+		done
+		missing_message=
+	}
+}
+
+# group the valgrind errors by backtrace
+output_all () {
+	last_line=
+	j=0
+	i=1
+	while test $i -le $count
+	do
+		# output <number> <backtrace-in-one-line>
+		echo "$i $(tr '\n' ' ' < $out_prefix.$i)"
+		i=$(($i+1))
+	done |
+	sort -t ' ' -k 2 | # order by <backtrace-in-one-line>
+	while read number line
+	do
+		# find duplicates, do not output backtrace twice
+		if test "$line" != "$last_line"
+		then
+			last_line=$line
+			j=$(($j+1))
+			printf "\nValgrind error $j:\n\n"
+			cat $out_prefix.$number
+			printf "\nfound in:\n"
+		fi
+		# print the test case where this came from
+		printf "\n"
+		cat $out_prefix.$number.message
+	done
+}
+
+handle_one () {
+	OLDIFS=$IFS
+	IFS="$new_line"
+	while read line
+	do
+		case "$line" in
+		# backtrace, possibly a new one
+		==[0-9]*)
+
+			# Does the current valgrind error have a message yet?
+			case "$output" in
+			*.message)
+				test -z "$missing_message" &&
+				missing_message=$count
+				output=
+			esac
+
+			start_output $(basename $1)
+			echo "$line" |
+			sed 's/==[0-9]*==/==valgrind==/' >> $output
+			;;
+		# end of backtrace
+		'}')
+			test -z "$output" || {
+				echo "$line" >> $output
+				test $output = ${output%.message} &&
+				output=$output.message
+			}
+			;;
+		# end of test case
+		'')
+			finish_output
+			;;
+		# normal line; if $output is set, print the line
+		*)
+			test -z "$output" || echo "$line" >> $output
+			;;
+		esac
+	done < $1
+	IFS=$OLDIFS
+
+	# just to be safe
+	finish_output
+}
+
+for test_script in "$TEST_OUTPUT_DIRECTORY"/test-results/*.out
+do
+	handle_one $test_script
+done
+
+output_all
diff --git a/third_party/git/t/valgrind/default.supp b/third_party/git/t/valgrind/default.supp
new file mode 100644
index 000000000000..0a6724fcc45e
--- /dev/null
+++ b/third_party/git/t/valgrind/default.supp
@@ -0,0 +1,51 @@
+{
+	ignore-zlib-errors-cond
+	Memcheck:Cond
+	obj:*libz.so*
+}
+
+{
+	ignore-zlib-errors-value8
+	Memcheck:Value8
+	obj:*libz.so*
+}
+
+{
+	ignore-zlib-errors-value4
+	Memcheck:Value4
+	obj:*libz.so*
+}
+
+{
+	ignore-ldso-cond
+	Memcheck:Cond
+	obj:*ld-*.so
+}
+
+{
+	ignore-ldso-addr8
+	Memcheck:Addr8
+	obj:*ld-*.so
+}
+
+{
+	ignore-ldso-addr4
+	Memcheck:Addr4
+	obj:*ld-*.so
+}
+
+{
+	writing-data-from-zlib-triggers-even-more-errors
+	Memcheck:Param
+	write(buf)
+	obj:/lib/ld-*.so
+	fun:write_in_full
+	fun:write_buffer
+	fun:write_loose_object
+}
+
+{
+	ignore-sse-strlen-invalid-read-size
+	Memcheck:Addr4
+	fun:copy_ref
+}
diff --git a/third_party/git/t/valgrind/valgrind.sh b/third_party/git/t/valgrind/valgrind.sh
new file mode 100755
index 000000000000..669ebaf68be0
--- /dev/null
+++ b/third_party/git/t/valgrind/valgrind.sh
@@ -0,0 +1,40 @@
+#!/bin/sh
+
+base=$(basename "$0")
+case "$base" in
+test-*)
+	program="$GIT_VALGRIND/../../t/helper/$base"
+	;;
+*)
+	program="$GIT_VALGRIND/../../$base"
+	;;
+esac
+
+TOOL_OPTIONS='--leak-check=no'
+
+test -z "$GIT_VALGRIND_ENABLED" &&
+exec "$program" "$@"
+
+case "$GIT_VALGRIND_MODE" in
+memcheck-fast)
+	;;
+memcheck)
+	VALGRIND_VERSION=$(valgrind --version)
+	VALGRIND_MAJOR=$(expr "$VALGRIND_VERSION" : '[^0-9]*\([0-9]*\)')
+	VALGRIND_MINOR=$(expr "$VALGRIND_VERSION" : '[^0-9]*[0-9]*\.\([0-9]*\)')
+	test 3 -gt "$VALGRIND_MAJOR" ||
+	test 3 -eq "$VALGRIND_MAJOR" -a 4 -gt "$VALGRIND_MINOR" ||
+	TOOL_OPTIONS="$TOOL_OPTIONS --track-origins=yes"
+	;;
+*)
+	TOOL_OPTIONS="--tool=$GIT_VALGRIND_MODE"
+esac
+
+exec valgrind -q --error-exitcode=126 \
+	--gen-suppressions=all \
+	--suppressions="$GIT_VALGRIND/default.supp" \
+	$TOOL_OPTIONS \
+	--log-fd=4 \
+	--input-fd=4 \
+	$GIT_VALGRIND_OPTIONS \
+	"$program" "$@"