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authorJunio C Hamano <gitster@pobox.com>2019-10-23 05:43:10 (GMT)
committerJunio C Hamano <gitster@pobox.com>2019-10-23 05:43:10 (GMT)
commit22dd22dce050f042b3eec165440966186691db42 (patch)
treeb2624031f65634e68ce80d4dbcb2c80db687273a
parent2e215b7959a895d6aadbb828622bef966738ed6a (diff)
parent3444ec2eb2be58c285d2bf04f39e6e9ea5eda9a2 (diff)
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Merge branch 'wb/fsmonitor-bitmap-fix'
A segfault fix. * wb/fsmonitor-bitmap-fix: fsmonitor: don't fill bitmap with entries to be removed
-rw-r--r--fsmonitor.c29
-rwxr-xr-xt/t7519-status-fsmonitor.sh17
-rwxr-xr-xt/t7519/fsmonitor-env24
3 files changed, 65 insertions, 5 deletions
diff --git a/fsmonitor.c b/fsmonitor.c
index 231e83a..1f4aa1b 100644
--- a/fsmonitor.c
+++ b/fsmonitor.c
@@ -14,8 +14,13 @@ struct trace_key trace_fsmonitor = TRACE_KEY_INIT(FSMONITOR);
static void fsmonitor_ewah_callback(size_t pos, void *is)
{
struct index_state *istate = (struct index_state *)is;
- struct cache_entry *ce = istate->cache[pos];
+ struct cache_entry *ce;
+ if (pos >= istate->cache_nr)
+ BUG("fsmonitor_dirty has more entries than the index (%"PRIuMAX" >= %u)",
+ (uintmax_t)pos, istate->cache_nr);
+
+ ce = istate->cache[pos];
ce->ce_flags &= ~CE_FSMONITOR_VALID;
}
@@ -50,17 +55,24 @@ int read_fsmonitor_extension(struct index_state *istate, const void *data,
}
istate->fsmonitor_dirty = fsmonitor_dirty;
+ if (istate->fsmonitor_dirty->bit_size > istate->cache_nr)
+ BUG("fsmonitor_dirty has more entries than the index (%"PRIuMAX" > %u)",
+ (uintmax_t)istate->fsmonitor_dirty->bit_size, istate->cache_nr);
+
trace_printf_key(&trace_fsmonitor, "read fsmonitor extension successful");
return 0;
}
void fill_fsmonitor_bitmap(struct index_state *istate)
{
- unsigned int i;
+ unsigned int i, skipped = 0;
istate->fsmonitor_dirty = ewah_new();
- for (i = 0; i < istate->cache_nr; i++)
- if (!(istate->cache[i]->ce_flags & CE_FSMONITOR_VALID))
- ewah_set(istate->fsmonitor_dirty, i);
+ for (i = 0; i < istate->cache_nr; i++) {
+ if (istate->cache[i]->ce_flags & CE_REMOVE)
+ skipped++;
+ else if (!(istate->cache[i]->ce_flags & CE_FSMONITOR_VALID))
+ ewah_set(istate->fsmonitor_dirty, i - skipped);
+ }
}
void write_fsmonitor_extension(struct strbuf *sb, struct index_state *istate)
@@ -71,6 +83,10 @@ void write_fsmonitor_extension(struct strbuf *sb, struct index_state *istate)
uint32_t ewah_size = 0;
int fixup = 0;
+ if (istate->fsmonitor_dirty->bit_size > istate->cache_nr)
+ BUG("fsmonitor_dirty has more entries than the index (%"PRIuMAX" > %u)",
+ (uintmax_t)istate->fsmonitor_dirty->bit_size, istate->cache_nr);
+
put_be32(&hdr_version, INDEX_EXTENSION_VERSION);
strbuf_add(sb, &hdr_version, sizeof(uint32_t));
@@ -236,6 +252,9 @@ void tweak_fsmonitor(struct index_state *istate)
}
/* Mark all previously saved entries as dirty */
+ if (istate->fsmonitor_dirty->bit_size > istate->cache_nr)
+ BUG("fsmonitor_dirty has more entries than the index (%"PRIuMAX" > %u)",
+ (uintmax_t)istate->fsmonitor_dirty->bit_size, istate->cache_nr);
ewah_each_bit(istate->fsmonitor_dirty, fsmonitor_ewah_callback, istate);
/* Now mark the untracked cache for fsmonitor usage */
diff --git a/t/t7519-status-fsmonitor.sh b/t/t7519-status-fsmonitor.sh
index 81a375f..d8df990 100755
--- a/t/t7519-status-fsmonitor.sh
+++ b/t/t7519-status-fsmonitor.sh
@@ -354,4 +354,21 @@ test_expect_success 'discard_index() also discards fsmonitor info' '
test_cmp expect actual
'
+# Test staging/unstaging files that appear at the end of the index. Test
+# file names begin with 'z' so that they are sorted to the end of the index.
+test_expect_success 'status succeeds after staging/unstaging ' '
+ test_create_repo fsmonitor-stage-unstage &&
+ (
+ cd fsmonitor-stage-unstage &&
+ test_commit initial &&
+ git update-index --fsmonitor &&
+ removed=$(test_seq 1 100 | sed "s/^/z/") &&
+ touch $removed &&
+ git add $removed &&
+ git config core.fsmonitor "$TEST_DIRECTORY/t7519/fsmonitor-env" &&
+ FSMONITOR_LIST="$removed" git restore -S $removed &&
+ FSMONITOR_LIST="$removed" git status
+ )
+'
+
test_done
diff --git a/t/t7519/fsmonitor-env b/t/t7519/fsmonitor-env
new file mode 100755
index 0000000..8f1f7ab
--- /dev/null
+++ b/t/t7519/fsmonitor-env
@@ -0,0 +1,24 @@
+#!/bin/sh
+#
+# An test hook script to integrate with git to test fsmonitor.
+#
+# The hook is passed a version (currently 1) and a time in nanoseconds
+# formatted as a string and outputs to stdout all files that have been
+# modified since the given time. Paths must be relative to the root of
+# the working tree and separated by a single NUL.
+#
+#echo "$0 $*" >&2
+
+if test "$#" -ne 2
+then
+ echo "$0: exactly 2 arguments expected" >&2
+ exit 2
+fi
+
+if test "$1" != 1
+then
+ echo "Unsupported core.fsmonitor hook version." >&2
+ exit 1
+fi
+
+printf '%s\n' $FSMONITOR_LIST