Handle allocation failures in `block_writer_init()` and
`block_reader_init()`. This requires us to bubble up error codes into
`writer_reinit_block_writer()`. Adapt call sites accordingly.
Signed-off-by: Patrick Steinhardt <ps@xxxxxx>
---
reftable/block.c | 23 +++++++++++++--
reftable/block.h | 4 +--
reftable/writer.c | 51 ++++++++++++++++++++++-----------
t/unit-tests/t-reftable-block.c | 20 +++++++------
4 files changed, 69 insertions(+), 29 deletions(-)
diff --git a/reftable/block.c b/reftable/block.c
index 00030eee06..bfa7dc61bf 100644
--- a/reftable/block.c
+++ b/reftable/block.c
@@ -52,6 +52,8 @@ static int block_writer_register_restart(struct block_writer *w, int n,
return -1;
if (is_restart) {
REFTABLE_ALLOC_GROW(w->restarts, w->restart_len + 1, w->restart_cap);
+ if (!w->restarts)
+ return REFTABLE_OUT_OF_MEMORY_ERROR;
w->restarts[w->restart_len++] = w->next;
}
@@ -63,8 +65,8 @@ static int block_writer_register_restart(struct block_writer *w, int n,
return 0;
}
-void block_writer_init(struct block_writer *bw, uint8_t typ, uint8_t *buf,
- uint32_t block_size, uint32_t header_off, int hash_size)
+int block_writer_init(struct block_writer *bw, uint8_t typ, uint8_t *buf,
+ uint32_t block_size, uint32_t header_off, int hash_size)
{
bw->buf = buf;
bw->hash_size = hash_size;
@@ -78,8 +80,12 @@ void block_writer_init(struct block_writer *bw, uint8_t typ, uint8_t *buf,
bw->last_key.len = 0;
if (!bw->zstream) {
REFTABLE_CALLOC_ARRAY(bw->zstream, 1);
+ if (!bw->zstream)
+ return REFTABLE_OUT_OF_MEMORY_ERROR;
deflateInit(bw->zstream, 9);
}
+
+ return 0;
}
uint8_t block_writer_type(struct block_writer *bw)
@@ -163,6 +169,10 @@ int block_writer_finish(struct block_writer *w)
*/
compressed_len = deflateBound(w->zstream, src_len);
REFTABLE_ALLOC_GROW(w->compressed, compressed_len, w->compressed_cap);
+ if (!w->compressed) {
+ ret = REFTABLE_OUT_OF_MEMORY_ERROR;
+ return ret;
+ }
w->zstream->next_out = w->compressed;
w->zstream->avail_out = compressed_len;
@@ -219,12 +229,21 @@ int block_reader_init(struct block_reader *br, struct reftable_block *block,
/* Log blocks specify the *uncompressed* size in their header. */
REFTABLE_ALLOC_GROW(br->uncompressed_data, sz,
br->uncompressed_cap);
+ if (!br->uncompressed_data) {
+ err = REFTABLE_OUT_OF_MEMORY_ERROR;
+ goto done;
+ }
/* Copy over the block header verbatim. It's not compressed. */
memcpy(br->uncompressed_data, block->data, block_header_skip);
if (!br->zstream) {
REFTABLE_CALLOC_ARRAY(br->zstream, 1);
+ if (!br->zstream) {
+ err = REFTABLE_OUT_OF_MEMORY_ERROR;
+ goto done;
+ }
+
err = inflateInit(br->zstream);
} else {
err = inflateReset(br->zstream);
diff --git a/reftable/block.h b/reftable/block.h
index 1c8f25ee6e..18d7ea0337 100644
--- a/reftable/block.h
+++ b/reftable/block.h
@@ -45,8 +45,8 @@ struct block_writer {
/*
* initializes the blockwriter to write `typ` entries, using `buf` as temporary
* storage. `buf` is not owned by the block_writer. */
-void block_writer_init(struct block_writer *bw, uint8_t typ, uint8_t *buf,
- uint32_t block_size, uint32_t header_off, int hash_size);
+int block_writer_init(struct block_writer *bw, uint8_t typ, uint8_t *buf,
+ uint32_t block_size, uint32_t header_off, int hash_size);
/* returns the block type (eg. 'r' for ref records. */
uint8_t block_writer_type(struct block_writer *bw);
diff --git a/reftable/writer.c b/reftable/writer.c
index 8ab2e916d3..791e246337 100644
--- a/reftable/writer.c
+++ b/reftable/writer.c
@@ -102,19 +102,24 @@ static int writer_write_header(struct reftable_writer *w, uint8_t *dest)
return header_size(writer_version(w));
}
-static void writer_reinit_block_writer(struct reftable_writer *w, uint8_t typ)
+static int writer_reinit_block_writer(struct reftable_writer *w, uint8_t typ)
{
- int block_start = 0;
- if (w->next == 0) {
+ int block_start = 0, ret;
+
+ if (w->next == 0)
block_start = header_size(writer_version(w));
- }
strbuf_reset(&w->last_key);
- block_writer_init(&w->block_writer_data, typ, w->block,
- w->opts.block_size, block_start,
- hash_size(w->opts.hash_id));
+ ret = block_writer_init(&w->block_writer_data, typ, w->block,
+ w->opts.block_size, block_start,
+ hash_size(w->opts.hash_id));
+ if (ret < 0)
+ return ret;
+
w->block_writer = &w->block_writer_data;
w->block_writer->restart_interval = w->opts.restart_interval;
+
+ return 0;
}
int reftable_writer_new(struct reftable_writer **out,
@@ -247,8 +252,11 @@ static int writer_add_record(struct reftable_writer *w,
strbuf_reset(&w->last_key);
strbuf_addbuf(&w->last_key, &key);
- if (!w->block_writer)
- writer_reinit_block_writer(w, reftable_record_type(rec));
+ if (!w->block_writer) {
+ err = writer_reinit_block_writer(w, reftable_record_type(rec));
+ if (err < 0)
+ goto done;
+ }
if (block_writer_type(w->block_writer) != reftable_record_type(rec))
BUG("record of type %d added to writer of type %d",
@@ -271,7 +279,9 @@ static int writer_add_record(struct reftable_writer *w,
err = writer_flush_block(w);
if (err < 0)
goto done;
- writer_reinit_block_writer(w, reftable_record_type(rec));
+ err = writer_reinit_block_writer(w, reftable_record_type(rec));
+ if (err < 0)
+ goto done;
/*
* Try to add the record to the writer again. If this still fails then
@@ -461,7 +471,9 @@ static int writer_finish_section(struct reftable_writer *w)
max_level++;
index_start = w->next;
- writer_reinit_block_writer(w, BLOCK_TYPE_INDEX);
+ err = writer_reinit_block_writer(w, BLOCK_TYPE_INDEX);
+ if (err < 0)
+ return err;
idx = w->index;
idx_len = w->index_len;
@@ -555,7 +567,10 @@ static void write_object_record(void *void_arg, void *key)
if (arg->err < 0)
goto done;
- writer_reinit_block_writer(arg->w, BLOCK_TYPE_OBJ);
+ arg->err = writer_reinit_block_writer(arg->w, BLOCK_TYPE_OBJ);
+ if (arg->err < 0)
+ goto done;
+
arg->err = block_writer_add(arg->w->block_writer, &rec);
if (arg->err == 0)
goto done;
@@ -584,16 +599,18 @@ static int writer_dump_object_index(struct reftable_writer *w)
struct common_prefix_arg common = {
.max = 1, /* obj_id_len should be >= 2. */
};
- if (w->obj_index_tree) {
+ int err;
+
+ if (w->obj_index_tree)
infix_walk(w->obj_index_tree, &update_common, &common);
- }
w->stats.object_id_len = common.max + 1;
- writer_reinit_block_writer(w, BLOCK_TYPE_OBJ);
+ err = writer_reinit_block_writer(w, BLOCK_TYPE_OBJ);
+ if (err < 0)
+ return err;
- if (w->obj_index_tree) {
+ if (w->obj_index_tree)
infix_walk(w->obj_index_tree, &write_object_record, &closure);
- }
if (closure.err < 0)
return closure.err;
diff --git a/t/unit-tests/t-reftable-block.c b/t/unit-tests/t-reftable-block.c
index f1a49485e2..e52a612e85 100644
--- a/t/unit-tests/t-reftable-block.c
+++ b/t/unit-tests/t-reftable-block.c
@@ -34,8 +34,9 @@ static void t_ref_block_read_write(void)
REFTABLE_CALLOC_ARRAY(block.data, block_size);
block.len = block_size;
block_source_from_strbuf(&block.source ,&buf);
- block_writer_init(&bw, BLOCK_TYPE_REF, block.data, block_size,
- header_off, hash_size(GIT_SHA1_FORMAT_ID));
+ ret = block_writer_init(&bw, BLOCK_TYPE_REF, block.data, block_size,
+ header_off, hash_size(GIT_SHA1_FORMAT_ID));
+ check(!ret);
rec.u.ref.refname = (char *) "";
rec.u.ref.value_type = REFTABLE_REF_DELETION;
@@ -126,8 +127,9 @@ static void t_log_block_read_write(void)
REFTABLE_CALLOC_ARRAY(block.data, block_size);
block.len = block_size;
block_source_from_strbuf(&block.source ,&buf);
- block_writer_init(&bw, BLOCK_TYPE_LOG, block.data, block_size,
- header_off, hash_size(GIT_SHA1_FORMAT_ID));
+ ret = block_writer_init(&bw, BLOCK_TYPE_LOG, block.data, block_size,
+ header_off, hash_size(GIT_SHA1_FORMAT_ID));
+ check(!ret);
for (i = 0; i < N; i++) {
rec.u.log.refname = xstrfmt("branch%02"PRIuMAX , (uintmax_t)i);
@@ -214,8 +216,9 @@ static void t_obj_block_read_write(void)
REFTABLE_CALLOC_ARRAY(block.data, block_size);
block.len = block_size;
block_source_from_strbuf(&block.source, &buf);
- block_writer_init(&bw, BLOCK_TYPE_OBJ, block.data, block_size,
- header_off, hash_size(GIT_SHA1_FORMAT_ID));
+ ret = block_writer_init(&bw, BLOCK_TYPE_OBJ, block.data, block_size,
+ header_off, hash_size(GIT_SHA1_FORMAT_ID));
+ check(!ret);
for (i = 0; i < N; i++) {
uint8_t bytes[] = { i, i + 1, i + 2, i + 3, i + 5 }, *allocated;
@@ -296,8 +299,9 @@ static void t_index_block_read_write(void)
REFTABLE_CALLOC_ARRAY(block.data, block_size);
block.len = block_size;
block_source_from_strbuf(&block.source, &buf);
- block_writer_init(&bw, BLOCK_TYPE_INDEX, block.data, block_size,
- header_off, hash_size(GIT_SHA1_FORMAT_ID));
+ ret = block_writer_init(&bw, BLOCK_TYPE_INDEX, block.data, block_size,
+ header_off, hash_size(GIT_SHA1_FORMAT_ID));
+ check(!ret);
for (i = 0; i < N; i++) {
strbuf_init(&recs[i].u.idx.last_key, 9);
--
2.47.0.rc0.dirty
