From: Taylor Blau <me@ttaylorr.com>
To: git@vger.kernel.org
Cc: peff@peff.net, dstolee@microsoft.com, gitster@pobox.com,
martin.agren@gmail.com
Subject: [PATCH v2 5/5] commit-graph.h: use odb in 'load_commit_graph_one_fd_st'
Date: Mon, 3 Feb 2020 13:18:04 -0800 [thread overview]
Message-ID: <aa12b7378b90abff5cb288a64fbe4a1b335cf73b.1580764494.git.me@ttaylorr.com> (raw)
In-Reply-To: <cover.1580764494.git.me@ttaylorr.com>
Apply a similar treatment as in the previous patch to pass a 'struct
object_directory *' through the 'load_commit_graph_one_fd_st'
initializer, too.
This prevents a potential bug where a pointer comparison is made to a
NULL 'g->odb', which would cause the commit-graph machinery to think
that a pair of commit-graphs belonged to different alternates when in
fact they do not (i.e., in the case of no '--object-dir').
Signed-off-by: Taylor Blau <me@ttaylorr.com>
---
builtin/commit-graph.c | 2 +-
commit-graph.c | 21 ++++++++++-----------
commit-graph.h | 3 ++-
t/helper/test-read-graph.c | 2 +-
4 files changed, 14 insertions(+), 14 deletions(-)
diff --git a/builtin/commit-graph.c b/builtin/commit-graph.c
index b16eba2a7a..dd6ab84be8 100644
--- a/builtin/commit-graph.c
+++ b/builtin/commit-graph.c
@@ -95,7 +95,7 @@ static int graph_verify(int argc, const char **argv)
FREE_AND_NULL(graph_name);
if (open_ok)
- graph = load_commit_graph_one_fd_st(fd, &st);
+ graph = load_commit_graph_one_fd_st(fd, &st, odb);
else
graph = read_commit_graph_one(the_repository, odb);
diff --git a/commit-graph.c b/commit-graph.c
index 49541760b5..656dd647d5 100644
--- a/commit-graph.c
+++ b/commit-graph.c
@@ -108,7 +108,8 @@ int open_commit_graph(const char *graph_file, int *fd, struct stat *st)
return 1;
}
-struct commit_graph *load_commit_graph_one_fd_st(int fd, struct stat *st)
+struct commit_graph *load_commit_graph_one_fd_st(int fd, struct stat *st,
+ struct object_directory *odb)
{
void *graph_map;
size_t graph_size;
@@ -124,7 +125,9 @@ struct commit_graph *load_commit_graph_one_fd_st(int fd, struct stat *st)
graph_map = xmmap(NULL, graph_size, PROT_READ, MAP_PRIVATE, fd, 0);
ret = parse_commit_graph(graph_map, fd, graph_size);
- if (!ret) {
+ if (ret)
+ ret->odb = odb;
+ else {
munmap(graph_map, graph_size);
close(fd);
}
@@ -299,7 +302,8 @@ struct commit_graph *parse_commit_graph(void *graph_map, int fd,
return graph;
}
-static struct commit_graph *load_commit_graph_one(const char *graph_file)
+static struct commit_graph *load_commit_graph_one(const char *graph_file,
+ struct object_directory *odb)
{
struct stat st;
@@ -310,7 +314,7 @@ static struct commit_graph *load_commit_graph_one(const char *graph_file)
if (!open_ok)
return NULL;
- g = load_commit_graph_one_fd_st(fd, &st);
+ g = load_commit_graph_one_fd_st(fd, &st, odb);
if (g)
g->filename = xstrdup(graph_file);
@@ -322,12 +326,9 @@ static struct commit_graph *load_commit_graph_v1(struct repository *r,
struct object_directory *odb)
{
char *graph_name = get_commit_graph_filename(odb);
- struct commit_graph *g = load_commit_graph_one(graph_name);
+ struct commit_graph *g = load_commit_graph_one(graph_name, odb);
free(graph_name);
- if (g)
- g->odb = odb;
-
return g;
}
@@ -406,13 +407,11 @@ static struct commit_graph *load_commit_graph_chain(struct repository *r,
valid = 0;
for (odb = r->objects->odb; odb; odb = odb->next) {
char *graph_name = get_split_graph_filename(odb, line.buf);
- struct commit_graph *g = load_commit_graph_one(graph_name);
+ struct commit_graph *g = load_commit_graph_one(graph_name, odb);
free(graph_name);
if (g) {
- g->odb = odb;
-
if (add_graph_to_chain(g, graph_chain, oids, i)) {
graph_chain = g;
valid = 1;
diff --git a/commit-graph.h b/commit-graph.h
index 5a690723b0..e87a6f6360 100644
--- a/commit-graph.h
+++ b/commit-graph.h
@@ -61,7 +61,8 @@ struct commit_graph {
const unsigned char *chunk_base_graphs;
};
-struct commit_graph *load_commit_graph_one_fd_st(int fd, struct stat *st);
+struct commit_graph *load_commit_graph_one_fd_st(int fd, struct stat *st,
+ struct object_directory *odb);
struct commit_graph *read_commit_graph_one(struct repository *r,
struct object_directory *odb);
struct commit_graph *parse_commit_graph(void *graph_map, int fd,
diff --git a/t/helper/test-read-graph.c b/t/helper/test-read-graph.c
index 2c2f65f06c..f8a461767c 100644
--- a/t/helper/test-read-graph.c
+++ b/t/helper/test-read-graph.c
@@ -22,7 +22,7 @@ int cmd__read_graph(int argc, const char **argv)
if (!open_ok)
die_errno(_("Could not open commit-graph '%s'"), graph_name);
- graph = load_commit_graph_one_fd_st(fd, &st);
+ graph = load_commit_graph_one_fd_st(fd, &st, odb);
if (!graph)
return 1;
--
2.25.0.119.gaa12b7378b
next prev parent reply other threads:[~2020-02-03 21:18 UTC|newest]
Thread overview: 28+ messages / expand[flat|nested] mbox.gz Atom feed top
2020-01-30 23:00 [PATCH 0/6] commit-graph: use 'struct object_directory *' everywhere Taylor Blau
2020-01-30 23:00 ` [PATCH 1/6] t5318: don't pass non-object directory to '--object-dir' Taylor Blau
2020-01-30 23:00 ` [PATCH 5/6] commit-graph.c: remove path normalization, comparison Taylor Blau
2020-01-30 23:00 ` [PATCH 6/6] commit-graph.h: use odb in 'load_commit_graph_one_fd_st' Taylor Blau
2020-01-30 23:00 ` [PATCH 2/6] commit-graph.h: store object directory in 'struct commit_graph' Taylor Blau
2020-01-31 6:52 ` Martin Ågren
2020-01-31 10:20 ` Jeff King
2020-01-31 19:19 ` Martin Ågren
2020-02-03 4:36 ` Taylor Blau
2020-02-03 8:36 ` Jeff King
2020-01-31 20:49 ` Junio C Hamano
2020-02-03 3:58 ` Taylor Blau
2020-01-30 23:00 ` [PATCH 4/6] commit-graph.h: store an odb in 'struct write_commit_graph_context' Taylor Blau
2020-01-30 23:00 ` [PATCH 3/6] builtin/commit-graph.c: die() with unknown '--object-dir' Taylor Blau
2020-01-31 10:30 ` [PATCH 0/6] commit-graph: use 'struct object_directory *' everywhere Jeff King
2020-01-31 13:22 ` Derrick Stolee
2020-02-03 4:38 ` Taylor Blau
2020-02-03 21:17 ` [PATCH v2 0/5] " Taylor Blau
2020-02-03 21:17 ` [PATCH v2 1/5] t5318: don't pass non-object directory to '--object-dir' Taylor Blau
2020-02-03 21:17 ` [PATCH v2 2/5] commit-graph.h: store an odb in 'struct write_commit_graph_context' Taylor Blau
2020-02-04 5:51 ` Taylor Blau
2020-02-04 19:54 ` Junio C Hamano
2020-02-04 21:28 ` Taylor Blau
2020-02-04 21:44 ` Junio C Hamano
2020-02-03 21:18 ` [PATCH v2 3/5] commit-graph.h: store object directory in 'struct commit_graph' Taylor Blau
2020-02-03 21:18 ` [PATCH v2 4/5] commit-graph.c: remove path normalization, comparison Taylor Blau
2020-02-03 21:18 ` Taylor Blau [this message]
2020-02-05 12:30 ` [PATCH v2 0/5] commit-graph: use 'struct object_directory *' everywhere Jeff King
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