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Diffstat (limited to 'src/event-parse-api.c')
| -rw-r--r-- | src/event-parse-api.c | 362 |
1 files changed, 362 insertions, 0 deletions
diff --git a/src/event-parse-api.c b/src/event-parse-api.c new file mode 100644 index 0000000..268a586 --- /dev/null +++ b/src/event-parse-api.c @@ -0,0 +1,362 @@ +// SPDX-License-Identifier: LGPL-2.1 +/* + * Copyright (C) 2009, 2010 Red Hat Inc, Steven Rostedt <srostedt@redhat.com> + * + */ + +#include "event-parse.h" +#include "event-parse-local.h" +#include "event-utils.h" + +/** + * tep_get_event - returns the event with the given index + * @tep: a handle to the tep_handle + * @index: index of the requested event, in the range 0 .. nr_events + * + * This returns pointer to the element of the events array with the given index + * If @tep is NULL, or @index is not in the range 0 .. nr_events, NULL is returned. + */ +struct tep_event *tep_get_event(struct tep_handle *tep, int index) +{ + if (tep && tep->events && index < tep->nr_events) + return tep->events[index]; + + return NULL; +} + +/** + * tep_get_first_event - returns the first event in the events array + * @tep: a handle to the tep_handle + * + * This returns pointer to the first element of the events array + * If @tep is NULL, NULL is returned. + */ +struct tep_event *tep_get_first_event(struct tep_handle *tep) +{ + return tep_get_event(tep, 0); +} + +/** + * tep_get_events_count - get the number of defined events + * @tep: a handle to the tep_handle + * + * This returns number of elements in event array + * If @tep is NULL, 0 is returned. + */ +int tep_get_events_count(struct tep_handle *tep) +{ + if (tep) + return tep->nr_events; + return 0; +} + +/** + * tep_get_events_count - get the number of defined events + * @tep: a handle to the tep_handle + * + * This returns number of elements in event array + * If @tep is NULL, 0 is returned. + */ +int tep_get_function_count(struct tep_handle *tep) +{ + if (tep) + return tep->func_count; + return 0; +} + +/** + * tep_set_flag - set event parser flag + * @tep: a handle to the tep_handle + * @flag: flag, or combination of flags to be set + * can be any combination from enum tep_flag + * + * This sets a flag or combination of flags from enum tep_flag + */ +void tep_set_flag(struct tep_handle *tep, int flag) +{ + if (tep) + tep->flags |= flag; +} + +/** + * tep_clear_flag - clear event parser flag + * @tep: a handle to the tep_handle + * @flag: flag to be cleared + * + * This clears a tep flag + */ +void tep_clear_flag(struct tep_handle *tep, enum tep_flag flag) +{ + if (tep) + tep->flags &= ~flag; +} + +/** + * tep_test_flag - check the state of event parser flag + * @tep: a handle to the tep_handle + * @flag: flag to be checked + * + * This returns the state of the requested tep flag. + * Returns: true if the flag is set, false otherwise. + */ +bool tep_test_flag(struct tep_handle *tep, enum tep_flag flag) +{ + if (tep) + return tep->flags & flag; + return false; +} + +__hidden unsigned short data2host2(struct tep_handle *tep, unsigned short data) +{ + unsigned short swap; + + if (!tep || tep->host_bigendian == tep->file_bigendian) + return data; + + swap = ((data & 0xffULL) << 8) | + ((data & (0xffULL << 8)) >> 8); + + return swap; +} + +__hidden unsigned int data2host4(struct tep_handle *tep, unsigned int data) +{ + unsigned int swap; + + if (!tep || tep->host_bigendian == tep->file_bigendian) + return data; + + swap = ((data & 0xffULL) << 24) | + ((data & (0xffULL << 8)) << 8) | + ((data & (0xffULL << 16)) >> 8) | + ((data & (0xffULL << 24)) >> 24); + + return swap; +} + +__hidden unsigned long long +data2host8(struct tep_handle *tep, unsigned long long data) +{ + unsigned long long swap; + + if (!tep || tep->host_bigendian == tep->file_bigendian) + return data; + + swap = ((data & 0xffULL) << 56) | + ((data & (0xffULL << 8)) << 40) | + ((data & (0xffULL << 16)) << 24) | + ((data & (0xffULL << 24)) << 8) | + ((data & (0xffULL << 32)) >> 8) | + ((data & (0xffULL << 40)) >> 24) | + ((data & (0xffULL << 48)) >> 40) | + ((data & (0xffULL << 56)) >> 56); + + return swap; +} + +/** + * tep_get_header_page_size - get size of the header page + * @tep: a handle to the tep_handle + * + * This returns size of the header page + * If @tep is NULL, 0 is returned. + */ +int tep_get_header_page_size(struct tep_handle *tep) +{ + if (tep) + return tep->header_page_size_size; + return 0; +} + +/** + * tep_get_header_timestamp_size - get size of the timestamp in the header page + * @tep: a handle to the tep_handle + * + * This returns size of the timestamp in the header page + * If @tep is NULL, 0 is returned. + */ +int tep_get_header_timestamp_size(struct tep_handle *tep) +{ + if (tep) + return tep->header_page_ts_size; + return 0; +} + +/** + * tep_get_cpus - get the number of CPUs + * @tep: a handle to the tep_handle + * + * This returns the number of CPUs + * If @tep is NULL, 0 is returned. + */ +int tep_get_cpus(struct tep_handle *tep) +{ + if (tep) + return tep->cpus; + return 0; +} + +/** + * tep_set_cpus - set the number of CPUs + * @tep: a handle to the tep_handle + * + * This sets the number of CPUs + */ +void tep_set_cpus(struct tep_handle *tep, int cpus) +{ + if (tep) + tep->cpus = cpus; +} + +/** + * tep_get_long_size - get the size of a long integer on the traced machine + * @tep: a handle to the tep_handle + * + * This returns the size of a long integer on the traced machine + * If @tep is NULL, 0 is returned. + */ +int tep_get_long_size(struct tep_handle *tep) +{ + if (tep) + return tep->long_size; + return 0; +} + +/** + * tep_set_long_size - set the size of a long integer on the traced machine + * @tep: a handle to the tep_handle + * @size: size, in bytes, of a long integer + * + * This sets the size of a long integer on the traced machine + */ +void tep_set_long_size(struct tep_handle *tep, int long_size) +{ + if (tep) + tep->long_size = long_size; +} + +/** + * tep_get_page_size - get the size of a memory page on the traced machine + * @tep: a handle to the tep_handle + * + * This returns the size of a memory page on the traced machine + * If @tep is NULL, 0 is returned. + */ +int tep_get_page_size(struct tep_handle *tep) +{ + if (tep) + return tep->page_size; + return 0; +} + +/** + * tep_set_page_size - set the size of a memory page on the traced machine + * @tep: a handle to the tep_handle + * @_page_size: size of a memory page, in bytes + * + * This sets the size of a memory page on the traced machine + */ +void tep_set_page_size(struct tep_handle *tep, int _page_size) +{ + if (tep) + tep->page_size = _page_size; +} + +/** + * tep_get_sub_buffer_size - get the size of a trace buffer page + * @tep: a handle to the tep_handle + * + * This returns the size of a trace buffer page on the traced machine. + * If @tep is NULL then -1 is returned. + */ +int tep_get_sub_buffer_size(struct tep_handle *tep) +{ + if (!tep) + return -1; + + return tep->header_page_data_size + tep->header_page_data_offset; +} + +/** + * tep_is_file_bigendian - return the endian of the file + * @tep: a handle to the tep_handle + * + * This returns true if the file is in big endian order + * If @tep is NULL, false is returned. + */ +bool tep_is_file_bigendian(struct tep_handle *tep) +{ + if (tep) + return (tep->file_bigendian == TEP_BIG_ENDIAN); + return false; +} + +/** + * tep_set_file_bigendian - set if the file is in big endian order + * @tep: a handle to the tep_handle + * @endian: non zero, if the file is in big endian order + * + * This sets if the file is in big endian order + */ +void tep_set_file_bigendian(struct tep_handle *tep, enum tep_endian endian) +{ + if (tep) + tep->file_bigendian = endian; +} + +/** + * tep_is_local_bigendian - return the endian of the saved local machine + * @tep: a handle to the tep_handle + * + * This returns true if the saved local machine in @tep is big endian. + * If @tep is NULL, false is returned. + */ +bool tep_is_local_bigendian(struct tep_handle *tep) +{ + if (tep) + return (tep->host_bigendian == TEP_BIG_ENDIAN); + return 0; +} + +/** + * tep_set_local_bigendian - set the stored local machine endian order + * @tep: a handle to the tep_handle + * @endian: non zero, if the local host has big endian order + * + * This sets the endian order for the local machine. + */ +void tep_set_local_bigendian(struct tep_handle *tep, enum tep_endian endian) +{ + if (tep) + tep->host_bigendian = endian; +} + +/** + * tep_is_old_format - get if an old kernel is used + * @tep: a handle to the tep_handle + * + * This returns true, if an old kernel is used to generate the tracing events or + * false if a new kernel is used. Old kernels did not have header page info. + * If @tep is NULL, false is returned. + */ +bool tep_is_old_format(struct tep_handle *tep) +{ + if (tep) + return tep->old_format; + return false; +} + +/** + * tep_set_test_filters - set a flag to test a filter string + * @tep: a handle to the tep_handle + * @test_filters: the new value of the test_filters flag + * + * This sets a flag to test a filter string. If this flag is set, when + * tep_filter_add_filter_str() API as called,it will print the filter string + * instead of adding it. + */ +void tep_set_test_filters(struct tep_handle *tep, int test_filters) +{ + if (tep) + tep->test_filters = test_filters; +} |