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libbpf: Fix usdt_cookie being cast to 32 bits 

The usdt_cookie is defined as __u64, which should not be
used as a long type because it will be cast to 32 bits
in 32-bit platforms.

Signed-off-by: Pu Lehui <pulehui@huawei.com>
Signed-off-by: Andrii Nakryiko <andrii@kernel.org>
Link: https://lore.kernel.org/bpf/20220419145238.482134-2-pulehui@huawei.com
This commit is contained in:
Pu Lehui 2022-04-19 22:52:37 +08:00 committed by Andrii Nakryiko
parent dcf456c9a0
commit 5af25a410a
3 changed files with 6 additions and 6 deletions
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2
tools/lib/bpf/libbpf.c
View File

@ -10993,7 +10993,7 @@ struct bpf_link *bpf_program__attach_usdt(const struct bpf_program *prog,
char resolved_path[512];
struct bpf_object *obj = prog->obj;
struct bpf_link *link;
long usdt_cookie;
__u64 usdt_cookie;
int err;
if (!OPTS_VALID(opts, bpf_uprobe_opts))

2
tools/lib/bpf/libbpf_internal.h
View File

@ -571,6 +571,6 @@ struct bpf_link * usdt_manager_attach_usdt(struct usdt_manager *man,
const struct bpf_program *prog,
pid_t pid, const char *path,
const char *usdt_provider, const char *usdt_name,
long usdt_cookie);
__u64 usdt_cookie);
#endif /* __LIBBPF_LIBBPF_INTERNAL_H */

8
tools/lib/bpf/usdt.c
View File

@ -557,10 +557,10 @@ static int parse_usdt_note(Elf *elf, const char *path, long base_addr,
GElf_Nhdr *nhdr, const char *data, size_t name_off, size_t desc_off,
struct usdt_note *usdt_note);
static int parse_usdt_spec(struct usdt_spec *spec, const struct usdt_note *note, long usdt_cookie);
static int parse_usdt_spec(struct usdt_spec *spec, const struct usdt_note *note, __u64 usdt_cookie);
static int collect_usdt_targets(struct usdt_manager *man, Elf *elf, const char *path, pid_t pid,
const char *usdt_provider, const char *usdt_name, long usdt_cookie,
const char *usdt_provider, const char *usdt_name, __u64 usdt_cookie,
struct usdt_target **out_targets, size_t *out_target_cnt)
{
size_t off, name_off, desc_off, seg_cnt = 0, lib_seg_cnt = 0, target_cnt = 0;
@ -939,7 +939,7 @@ static int allocate_spec_id(struct usdt_manager *man, struct hashmap *specs_hash
struct bpf_link *usdt_manager_attach_usdt(struct usdt_manager *man, const struct bpf_program *prog,
pid_t pid, const char *path,
const char *usdt_provider, const char *usdt_name,
long usdt_cookie)
__u64 usdt_cookie)
{
int i, fd, err, spec_map_fd, ip_map_fd;
LIBBPF_OPTS(bpf_uprobe_opts, opts);
@ -1141,7 +1141,7 @@ static int parse_usdt_note(Elf *elf, const char *path, long base_addr,
static int parse_usdt_arg(const char *arg_str, int arg_num, struct usdt_arg_spec *arg);
static int parse_usdt_spec(struct usdt_spec *spec, const struct usdt_note *note, long usdt_cookie)
static int parse_usdt_spec(struct usdt_spec *spec, const struct usdt_note *note, __u64 usdt_cookie)
{
const char *s;
int len;