Merge branch 'jh/memihash-opt'
Hotfix for a topic that is already in 'master'.
* jh/memihash-opt:
p0004: make perf test executable
t3008: skip lazy-init test on a single-core box
test-online-cpus: helper to return cpu count
name-hash: fix buffer overrun
diff --git a/Makefile b/Makefile
index c6dbecc..eb1a1a7 100644
--- a/Makefile
+++ b/Makefile
@@ -626,6 +626,7 @@
TEST_PROGRAMS_NEED_X += test-match-trees
TEST_PROGRAMS_NEED_X += test-mergesort
TEST_PROGRAMS_NEED_X += test-mktemp
+TEST_PROGRAMS_NEED_X += test-online-cpus
TEST_PROGRAMS_NEED_X += test-parse-options
TEST_PROGRAMS_NEED_X += test-path-utils
TEST_PROGRAMS_NEED_X += test-prio-queue
diff --git a/name-hash.c b/name-hash.c
index cac313c..39309ef 100644
--- a/name-hash.c
+++ b/name-hash.c
@@ -342,7 +342,9 @@ static int handle_range_dir(
* Scan forward in the index array for index entries having the same
* path prefix (that are also in this directory).
*/
- if (strncmp(istate->cache[k_start + 1]->name, prefix->buf, prefix->len) > 0)
+ if (k_start + 1 >= k_end)
+ k = k_end;
+ else if (strncmp(istate->cache[k_start + 1]->name, prefix->buf, prefix->len) > 0)
k = k_start + 1;
else if (strncmp(istate->cache[k_end - 1]->name, prefix->buf, prefix->len) == 0)
k = k_end;
diff --git a/t/helper/.gitignore b/t/helper/.gitignore
index d1fa751..acd5db1 100644
--- a/t/helper/.gitignore
+++ b/t/helper/.gitignore
@@ -16,6 +16,7 @@
/test-match-trees
/test-mergesort
/test-mktemp
+/test-online-cpus
/test-parse-options
/test-path-utils
/test-prio-queue
diff --git a/t/helper/test-online-cpus.c b/t/helper/test-online-cpus.c
new file mode 100644
index 0000000..06c09c6
--- /dev/null
+++ b/t/helper/test-online-cpus.c
@@ -0,0 +1,8 @@
+#include "git-compat-util.h"
+#include "thread-utils.h"
+
+int cmd_main(int argc, const char **argv)
+{
+ printf("%d\n", online_cpus());
+ return 0;
+}
diff --git a/t/perf/p0004-lazy-init-name-hash.sh b/t/perf/p0004-lazy-init-name-hash.sh
old mode 100644
new mode 100755
diff --git a/t/t3008-ls-files-lazy-init-name-hash.sh b/t/t3008-ls-files-lazy-init-name-hash.sh
new file mode 100755
index 0000000..bdf5198
--- /dev/null
+++ b/t/t3008-ls-files-lazy-init-name-hash.sh
@@ -0,0 +1,27 @@
+#!/bin/sh
+
+test_description='Test the lazy init name hash with various folder structures'
+
+. ./test-lib.sh
+
+if test 1 -eq $($GIT_BUILD_DIR/t/helper/test-online-cpus)
+then
+ skip_all='skipping lazy-init tests, single cpu'
+ test_done
+fi
+
+LAZY_THREAD_COST=2000
+
+test_expect_success 'no buffer overflow in lazy_init_name_hash' '
+ (
+ test_seq $LAZY_THREAD_COST | sed "s/^/a_/"
+ echo b/b/b
+ test_seq $LAZY_THREAD_COST | sed "s/^/c_/"
+ test_seq 50 | sed "s/^/d_/" | tr "\n" "/"; echo d
+ ) |
+ sed "s/^/100644 $EMPTY_BLOB /" |
+ git update-index --index-info &&
+ test-lazy-init-name-hash -m
+'
+
+test_done
