#include <string>
#include <type_traits>
-#define CTF_SPEC_MAJOR 1
-#define CTF_SPEC_MINOR 8
+#define CTF_SPEC_MAJOR 1
+#define CTF_SPEC_MINOR 8
struct ust_app;
-class ust_registry_session;
namespace lttng {
namespace sessiond {
-namespace details {
-void locked_ust_registry_session_release(ust_registry_session *session);
-} /* namespace details */
-} /* namespace sessiond */
-} /* namespace lttng */
-
-class ust_registry_session : public lttng::sessiond::trace::trace_class {
-public:
- using locked_ptr = std::unique_ptr<ust_registry_session,
- lttng::details::create_unique_class<ust_registry_session,
- lttng::sessiond::details::locked_ust_registry_session_release>::
- deleter>;
-
- virtual lttng_buffer_type get_buffering_scheme() const noexcept = 0;
- locked_ptr lock();
-
- void add_channel(uint64_t channel_key);
- lttng::sessiond::ust::registry_channel& get_channel(uint64_t channel_key) const;
- void remove_channel(uint64_t channel_key, bool notify);
-
- void regenerate_metadata();
- virtual ~ust_registry_session();
-
- /*
- * With multiple writers and readers, use this lock to access
- * the registry. Can nest within the ust app session lock.
- * Also acts as a registry serialization lock. Used by registry
- * readers to serialize the registry information sent from the
- * sessiond to the consumerd.
- * The consumer socket lock nests within this lock.
- */
- mutable pthread_mutex_t _lock;
- /* Next channel ID available for a newly registered channel. */
- uint32_t _next_channel_id = 0;
- /* Once this value reaches UINT32_MAX, no more id can be allocated. */
- uint32_t _used_channel_id = 0;
- /* Next enumeration ID available. */
- uint64_t _next_enum_id = 0;
-
- /* Generated metadata. */
- char *_metadata = nullptr; /* NOT null-terminated ! Use memcpy. */
- size_t _metadata_len = 0, _metadata_alloc_len = 0;
- /* Length of bytes sent to the consumer. */
- size_t _metadata_len_sent = 0;
- /* Current version of the metadata. */
- uint64_t _metadata_version = 0;
-
- /*
- * Those fields are only used when a session is created with
- * the --shm-path option. In this case, the metadata is output
- * twice: once to the consumer, as ususal, but a second time
- * also in the shm path directly. This is done so that a copy
- * of the metadata that is as fresh as possible is available
- * on the event of a crash.
- *
- * root_shm_path contains the shm-path provided by the user, along with
- * the session's name and timestamp:
- * e.g. /tmp/my_shm/my_session-20180612-135822
- *
- * shm_path contains the full path of the memory buffers:
- * e.g. /tmp/my_shm/my_session-20180612-135822/ust/uid/1000/64-bit
- *
- * metadata_path contains the full path to the metadata file that
- * is kept for the "crash buffer" extraction:
- * e.g.
- * /tmp/my_shm/my_session-20180612-135822/ust/uid/1000/64-bit/metadata
- *
- * Note that this is not the trace's final metadata file. It is
- * only meant to be used to read the contents of the ring buffers
- * in the event of a crash.
- *
- * metadata_fd is a file descriptor that points to the file at
- * 'metadata_path'.
- */
- char _root_shm_path[PATH_MAX] = {};
- char _shm_path[PATH_MAX] = {};
- char _metadata_path[PATH_MAX] = {};
- /* File-backed metadata FD */
- int _metadata_fd = -1;
-
- /*
- * Hash table containing channels sent by the UST tracer. MUST
- * be accessed with a RCU read side lock acquired.
- */
- lttng_ht::uptr _channels;
-
- /*
- * Unique key to identify the metadata on the consumer side.
- */
- uint64_t _metadata_key = 0;
- /*
- * Indicates if the metadata is closed on the consumer side. This is to
- * avoid double close of metadata when an application unregisters AND
- * deletes its sessions.
- */
- bool _metadata_closed = false;
-
- /* User and group owning the session. */
- uid_t _uid = -1;
- gid_t _gid = -1;
-
- /* Enumerations table. */
- lttng_ht::uptr _enums;
-
- /*
- * Copy of the tracer version when the first app is registered.
- * It is used if we need to regenerate the metadata.
- */
- uint32_t _app_tracer_version_major = 0;
- uint32_t _app_tracer_version_minor = 0;
-
- /* The id of the parent session */
- ltt_session::id_t _tracing_id = -1ULL;
+namespace ust {
-protected:
- /* Prevent instanciation of this base class. */
- ust_registry_session(const struct lttng::sessiond::trace::abi& abi,
- unsigned int app_tracer_version_major,
- unsigned int app_tracer_version_minor,
- const char *root_shm_path,
- const char *shm_path,
- uid_t euid,
- gid_t egid,
- uint64_t tracing_id);
- virtual void _visit_environment(
- lttng::sessiond::trace::trace_class_visitor& trace_class_visitor)
- const override;
- void _generate_metadata();
-
-private:
- uint32_t _get_next_channel_id();
- void _increase_metadata_size(size_t reservation_length);
- void _append_metadata_fragment(const std::string& fragment);
- void _reset_metadata();
-
- virtual void _accept_on_clock_classes(
- lttng::sessiond::trace::trace_class_visitor& trace_class_visitor)
- const override final;
- virtual void _accept_on_stream_classes(
- lttng::sessiond::trace::trace_class_visitor& trace_class_visitor)
- const override final;
-
- lttng::sessiond::ust::clock_class _clock;
- const lttng::sessiond::trace::trace_class_visitor::cuptr _metadata_generating_visitor;
-};
+class registry_session;
-class ust_registry_session_per_uid : public ust_registry_session {
-public:
- ust_registry_session_per_uid(const struct lttng::sessiond::trace::abi& trace_abi,
- uint32_t major,
- uint32_t minor,
- const char *root_shm_path,
- const char *shm_path,
- uid_t euid,
- gid_t egid,
- uint64_t tracing_id,
- uid_t tracing_uid);
-
- virtual lttng_buffer_type get_buffering_scheme() const noexcept override final;
-
-private:
- virtual void _visit_environment(
- lttng::sessiond::trace::trace_class_visitor& trace_class_visitor)
- const override final;
-
- const uid_t _tracing_uid;
-};
+namespace details {
-class ust_registry_session_per_pid : public ust_registry_session {
-public:
- ust_registry_session_per_pid(const struct ust_app& app,
- const struct lttng::sessiond::trace::abi&
- trace_abi,
- uint32_t major,
- uint32_t minor,
- const char *root_shm_path,
- const char *shm_path,
- uid_t euid,
- gid_t egid,
- uint64_t tracing_id);
-
- virtual lttng_buffer_type get_buffering_scheme() const noexcept override final;
-
-private:
- virtual void _visit_environment(
- lttng::sessiond::trace::trace_class_visitor& trace_class_visitor)
- const override final;
-
- const unsigned int _tracer_patch_level_version;
- const pid_t _vpid;
- const std::string _procname;
- const std::time_t _app_creation_time;
-};
+template <class MappingIntegerType>
+typename trace::typed_enumeration_type<MappingIntegerType>::mappings
+mappings_from_ust_ctl_entries(const lttng_ust_ctl_enum_entry *in_entries, size_t in_entry_count)
+{
+ typename trace::typed_enumeration_type<MappingIntegerType>::mappings mappings;
+ MappingIntegerType next_range_begin = 0;
+ for (size_t entry_idx = 0; entry_idx < in_entry_count; entry_idx++) {
+ const auto& entry = in_entries[entry_idx];
+ MappingIntegerType range_begin, range_end;
+
+ if (entry.u.extra.options & LTTNG_UST_CTL_UST_ENUM_ENTRY_OPTION_IS_AUTO) {
+ range_begin = range_end = next_range_begin;
+ } else {
+ range_begin = (MappingIntegerType) entry.start.value;
+ range_end = (MappingIntegerType) entry.end.value;
+ }
+
+ next_range_begin = range_end + 1;
+ mappings.emplace_back(
+ entry.string,
+ typename trace::typed_enumeration_type<MappingIntegerType>::mapping::range_t{
+ range_begin, range_end });
+ }
-namespace lttng {
-namespace sessiond {
-namespace ust {
+ return mappings;
+}
+} /* namespace details */
class registry_enum {
public:
- using const_rcu_protected_reference = lttng::locked_reference<const registry_enum, lttng::urcu::unique_read_lock>;
+ using const_rcu_protected_reference =
+ lttng::locked_reference<const registry_enum, lttng::urcu::unique_read_lock>;
- registry_enum(std::string name, enum lttng::sessiond::trace::integer_type::signedness signedness);
+ registry_enum(std::string name,
+ enum lttng::sessiond::trace::integer_type::signedness signedness);
virtual ~registry_enum() = default;
+ registry_enum(const registry_enum&) = delete;
+ registry_enum(registry_enum&&) = delete;
+ registry_enum& operator=(registry_enum&&) = delete;
+ registry_enum& operator=(const registry_enum&) = delete;
std::string name;
enum lttng::sessiond::trace::integer_type::signedness signedness;
struct rcu_head rcu_head;
friend bool operator==(const registry_enum& lhs, const registry_enum& rhs) noexcept;
+
protected:
virtual bool _is_equal(const registry_enum& other) const noexcept = 0;
};
bool operator==(const registry_enum& lhs, const registry_enum& rhs) noexcept;
-namespace details {
-template <class MappingIntegerType>
-typename trace::typed_enumeration_type<MappingIntegerType>::mapping mapping_from_ust_ctl_entry(
- const lttng_ust_ctl_enum_entry& entry)
-{
- if (entry.u.extra.options & LTTNG_UST_CTL_UST_ENUM_ENTRY_OPTION_IS_AUTO) {
- return {entry.string};
-
- } else {
- return {entry.string,
- {(MappingIntegerType) entry.start.value,
- (MappingIntegerType) entry.end.value}};
- }
-}
-
-template <class MappingIntegerType>
-typename trace::typed_enumeration_type<MappingIntegerType>::mappings mappings_from_ust_ctl_entries(
- const lttng_ust_ctl_enum_entry *in_entries, size_t in_entry_count)
-{
- typename trace::typed_enumeration_type<MappingIntegerType>::mappings mappings;
-
- for (size_t entry_idx = 0; entry_idx < in_entry_count; entry_idx++) {
- const auto& entry = in_entries[entry_idx];
-
- mappings.emplace_back(mapping_from_ust_ctl_entry<MappingIntegerType>(entry));
- }
-
- return mappings;
-}
-} /* namespace details */
-
template <class MappingIntegerType>
class registry_typed_enum : public registry_enum {
public:
registry_typed_enum(const char *in_name,
- const lttng_ust_ctl_enum_entry *entries,
- size_t entry_count) :
+ const lttng_ust_ctl_enum_entry *entries,
+ size_t entry_count) :
registry_enum(in_name,
- std::is_signed<MappingIntegerType>::value ?
- lttng::sessiond::trace::integer_type::signedness::SIGNED :
- lttng::sessiond::trace::integer_type::signedness::UNSIGNED),
- _mappings{std::make_shared<
- typename trace::typed_enumeration_type<MappingIntegerType>::mappings>(
- details::mappings_from_ust_ctl_entries<MappingIntegerType>(
- entries, entry_count))}
+ std::is_signed<MappingIntegerType>::value ?
+ lttng::sessiond::trace::integer_type::signedness::SIGNED :
+ lttng::sessiond::trace::integer_type::signedness::UNSIGNED),
+ _mappings{ std::make_shared<
+ typename trace::typed_enumeration_type<MappingIntegerType>::mappings>(
+ details::mappings_from_ust_ctl_entries<MappingIntegerType>(entries,
+ entry_count)) }
{
}
const typename std::shared_ptr<const typename lttng::sessiond::trace::typed_enumeration_type<
- MappingIntegerType>::mappings>
- _mappings;
+ MappingIntegerType>::mappings>
+ _mappings;
protected:
- virtual bool _is_equal(const registry_enum& base_other) const noexcept
+ bool _is_equal(const registry_enum& base_other) const noexcept override
{
- const auto &other = static_cast<decltype(*this)&>(base_other);
+ const auto& other = static_cast<decltype(*this)&>(base_other);
/* Don't compare IDs as some comparisons are performed before an id is assigned. */
return this->name == other.name && *this->_mappings == *other._mappings;
*
* Return new instance on success, nullptr on error.
*/
-ust_registry_session *ust_registry_session_per_uid_create(
- const lttng::sessiond::trace::abi& abi,
- uint32_t major,
- uint32_t minor,
- const char *root_shm_path,
- const char *shm_path,
- uid_t euid,
- gid_t egid,
- uint64_t tracing_id,
- uid_t tracing_uid);
+lttng::sessiond::ust::registry_session *
+ust_registry_session_per_uid_create(const lttng::sessiond::trace::abi& abi,
+ uint32_t major,
+ uint32_t minor,
+ const char *root_shm_path,
+ const char *shm_path,
+ uid_t euid,
+ gid_t egid,
+ uint64_t tracing_id,
+ uid_t tracing_uid);
/*
* Create per-pid registry with default values.
*
* Return new instance on success, nullptr on error.
*/
-ust_registry_session *ust_registry_session_per_pid_create(struct ust_app *app,
- const lttng::sessiond::trace::abi& abi,
- uint32_t major,
- uint32_t minor,
- const char *root_shm_path,
- const char *shm_path,
- uid_t euid,
- gid_t egid,
- uint64_t tracing_id);
-void ust_registry_session_destroy(ust_registry_session *session);
+lttng::sessiond::ust::registry_session *
+ust_registry_session_per_pid_create(struct ust_app *app,
+ const lttng::sessiond::trace::abi& abi,
+ uint32_t major,
+ uint32_t minor,
+ const char *root_shm_path,
+ const char *shm_path,
+ uid_t euid,
+ gid_t egid,
+ uint64_t tracing_id);
+void ust_registry_session_destroy(lttng::sessiond::ust::registry_session *session);
void ust_registry_channel_destroy_event(lttng::sessiond::ust::registry_channel *chan,
- lttng::sessiond::ust::registry_event *event);
-
-int ust_registry_create_or_find_enum(ust_registry_session *session,
- int session_objd, char *name,
- struct lttng_ust_ctl_enum_entry *entries, size_t nr_entries,
- uint64_t *enum_id);
-lttng::sessiond::ust::registry_enum::const_rcu_protected_reference
-ust_registry_lookup_enum_by_id(const ust_registry_session *session,
- const char *name, uint64_t id);
-void ust_registry_destroy_enum(ust_registry_session *reg_session,
- lttng::sessiond::ust::registry_enum *reg_enum);
+ lttng::sessiond::ust::registry_event *event);
+
#else /* HAVE_LIBLTTNG_UST_CTL */
-static inline
-ust_registry_session *ust_registry_session_per_uid_create(
- uint32_t bits_per_long __attribute__((unused)),
- uint32_t uint8_t_alignment __attribute__((unused)),
- uint32_t uint16_t_alignment __attribute__((unused)),
- uint32_t uint32_t_alignment __attribute__((unused)),
- uint32_t uint64_t_alignment __attribute__((unused)),
- uint32_t long_alignment __attribute__((unused)),
- int byte_order __attribute__((unused)),
- uint32_t major __attribute__((unused)),
- uint32_t minor __attribute__((unused)),
- const char *root_shm_path __attribute__((unused)),
- const char *shm_path __attribute__((unused)),
- uid_t euid __attribute__((unused)),
- gid_t egid __attribute__((unused)),
- uint64_t tracing_id __attribute__((unused)),
- uid_t tracing_uid __attribute__((unused)))
+static inline lttng::sessiond::ust::registry_session *
+ust_registry_session_per_uid_create(uint32_t bits_per_long __attribute__((unused)),
+ uint32_t uint8_t_alignment __attribute__((unused)),
+ uint32_t uint16_t_alignment __attribute__((unused)),
+ uint32_t uint32_t_alignment __attribute__((unused)),
+ uint32_t uint64_t_alignment __attribute__((unused)),
+ uint32_t long_alignment __attribute__((unused)),
+ int byte_order __attribute__((unused)),
+ uint32_t major __attribute__((unused)),
+ uint32_t minor __attribute__((unused)),
+ const char *root_shm_path __attribute__((unused)),
+ const char *shm_path __attribute__((unused)),
+ uid_t euid __attribute__((unused)),
+ gid_t egid __attribute__((unused)),
+ uint64_t tracing_id __attribute__((unused)),
+ uid_t tracing_uid __attribute__((unused)))
{
return nullptr;
}
-static inline
-ust_registry_session *ust_registry_session_per_pid_create(
- struct ust_app *app __attribute__((unused)),
- uint32_t bits_per_long __attribute__((unused)),
- uint32_t uint8_t_alignment __attribute__((unused)),
- uint32_t uint16_t_alignment __attribute__((unused)),
- uint32_t uint32_t_alignment __attribute__((unused)),
- uint32_t uint64_t_alignment __attribute__((unused)),
- uint32_t long_alignment __attribute__((unused)),
- int byte_order __attribute__((unused)),
- uint32_t major __attribute__((unused)),
- uint32_t minor __attribute__((unused)),
- const char *root_shm_path __attribute__((unused)),
- const char *shm_path __attribute__((unused)),
- uid_t euid __attribute__((unused)),
- gid_t egid __attribute__((unused)),
- uint64_t tracing_id __attribute__((unused)))
+static inline lttng::sessiond::ust::registry_session *
+ust_registry_session_per_pid_create(struct ust_app *app __attribute__((unused)),
+ uint32_t bits_per_long __attribute__((unused)),
+ uint32_t uint8_t_alignment __attribute__((unused)),
+ uint32_t uint16_t_alignment __attribute__((unused)),
+ uint32_t uint32_t_alignment __attribute__((unused)),
+ uint32_t uint64_t_alignment __attribute__((unused)),
+ uint32_t long_alignment __attribute__((unused)),
+ int byte_order __attribute__((unused)),
+ uint32_t major __attribute__((unused)),
+ uint32_t minor __attribute__((unused)),
+ const char *root_shm_path __attribute__((unused)),
+ const char *shm_path __attribute__((unused)),
+ uid_t euid __attribute__((unused)),
+ gid_t egid __attribute__((unused)),
+ uint64_t tracing_id __attribute__((unused)))
{
return nullptr;
}
-static inline
-void ust_registry_session_destroy(
- ust_registry_session *session __attribute__((unused)))
-{}
-
-static inline
-void ust_registry_destroy_event(
- lttng::sessiond::ust::registry_channel *chan __attribute__((unused)),
- lttng::sessiond::ust::registry_event *event __attribute__((unused)))
-{}
-
-/* The app object can be NULL for registry shared across applications. */
-static inline
-int ust_metadata_session_statedump(
- ust_registry_session *session __attribute__((unused)))
+static inline void ust_registry_session_destroy(lttng::sessiond::ust::registry_session *session
+ __attribute__((unused)))
{
- return 0;
}
-static inline
-int ust_metadata_channel_statedump(
- ust_registry_session *session __attribute__((unused)),
- lttng::sessiond::ust::registry_channel *chan __attribute__((unused)))
+static inline void ust_registry_destroy_event(lttng::sessiond::ust::registry_channel *chan
+ __attribute__((unused)),
+ lttng::sessiond::ust::registry_event *event
+ __attribute__((unused)))
{
- return 0;
}
-static inline
-int ust_metadata_event_statedump(
- ust_registry_session *session __attribute__((unused)),
- lttng::sessiond::ust::registry_channel *chan __attribute__((unused)),
- lttng::sessiond::ust::registry_event *event __attribute__((unused)))
+/* The app object can be NULL for registry shared across applications. */
+static inline int ust_metadata_session_statedump(lttng::sessiond::ust::registry_session *session
+ __attribute__((unused)))
{
return 0;
}
-static inline
-int ust_registry_create_or_find_enum(
- ust_registry_session *session __attribute__((unused)),
- int session_objd __attribute__((unused)),
- char *name __attribute__((unused)),
- struct lttng_ust_ctl_enum_entry *entries __attribute__((unused)),
- size_t nr_entries __attribute__((unused)),
- uint64_t *enum_id __attribute__((unused)))
+static inline int ust_metadata_channel_statedump(lttng::sessiond::ust::registry_session *session
+ __attribute__((unused)),
+ lttng::sessiond::ust::registry_channel *chan
+ __attribute__((unused)))
{
return 0;
}
-static inline
-struct ust_registry_enum *
- ust_registry_lookup_enum_by_id(
- const ust_registry_session *session __attribute__((unused)),
- const char *name __attribute__((unused)),
- uint64_t id __attribute__((unused)))
+static inline int ust_metadata_event_statedump(lttng::sessiond::ust::registry_session *session
+ __attribute__((unused)),
+ lttng::sessiond::ust::registry_channel *chan
+ __attribute__((unused)),
+ lttng::sessiond::ust::registry_event *event
+ __attribute__((unused)))
{
- return NULL;
+ return 0;
}
-static inline
-void ust_registry_destroy_enum(ust_registry_session *reg_session __attribute__((unused)),
- struct ust_registry_enum *reg_enum __attribute__((unused)))
-{}
-
#endif /* HAVE_LIBLTTNG_UST_CTL */
#endif /* LTTNG_UST_REGISTRY_H */
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