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kernel/trace/trace_entries.h
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/* * This file defines the trace event structures that go into the ring * buffer directly. They are created via macros so that changes for them * appear in the format file. Using macros will automate this process. * * The macro used to create a ftrace data structure is: * * FTRACE_ENTRY( name, struct_name, id, structure, print ) * * @name: the name used the event name, as well as the name of * the directory that holds the format file. * * @struct_name: the name of the structure that is created. * * @id: The event identifier that is used to detect what event * this is from the ring buffer. * * @structure: the structure layout * * - __field( type, item ) * This is equivalent to declaring * type item; * in the structure. * - __array( type, item, size ) * This is equivalent to declaring * type item[size]; * in the structure. * |
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* * for structures within structures, the format of the internal |
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* structure is laid out. This allows the internal structure |
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* to be deciphered for the format file. Although these macros * may become out of sync with the internal structure, they * will create a compile error if it happens. Since the * internel structures are just tracing helpers, this is not * an issue. * * When an internal structure is used, it should use: * * __field_struct( type, item ) * * instead of __field. This will prevent it from being shown in * the output file. The fields in the structure should use. * * __field_desc( type, container, item ) * __array_desc( type, container, item, len ) * * type, item and len are the same as __field and __array, but * container is added. This is the name of the item in * __field_struct that this is describing. * * |
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* @print: the print format shown to users in the format file. */ /* |
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* Function trace entry - function address and parent function address: |
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*/ |
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FTRACE_ENTRY_REG(function, ftrace_entry, |
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TRACE_FN, F_STRUCT( __field( unsigned long, ip ) __field( unsigned long, parent_ip ) ), |
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F_printk(" %lx <-- %lx", __entry->ip, __entry->parent_ip), |
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FILTER_TRACE_FN, |
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perf_ftrace_event_register |
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); /* Function call entry */ FTRACE_ENTRY(funcgraph_entry, ftrace_graph_ent_entry, TRACE_GRAPH_ENT, F_STRUCT( |
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__field_struct( struct ftrace_graph_ent, graph_ent ) __field_desc( unsigned long, graph_ent, func ) __field_desc( int, graph_ent, depth ) |
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), |
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F_printk("--> %lx (%d)", __entry->func, __entry->depth), FILTER_OTHER |
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); /* Function return entry */ FTRACE_ENTRY(funcgraph_exit, ftrace_graph_ret_entry, TRACE_GRAPH_RET, F_STRUCT( |
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__field_struct( struct ftrace_graph_ret, ret ) __field_desc( unsigned long, ret, func ) __field_desc( unsigned long long, ret, calltime) __field_desc( unsigned long long, ret, rettime ) __field_desc( unsigned long, ret, overrun ) __field_desc( int, ret, depth ) |
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), F_printk("<-- %lx (%d) (start: %llx end: %llx) over: %d", __entry->func, __entry->depth, |
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__entry->calltime, __entry->rettime, |
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__entry->depth), FILTER_OTHER |
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); /* * Context switch trace entry - which task (and prio) we switched from/to: * * This is used for both wakeup and context switches. We only want * to create one structure, but we need two outputs for it. */ #define FTRACE_CTX_FIELDS \ __field( unsigned int, prev_pid ) \ |
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__field( unsigned int, next_pid ) \ __field( unsigned int, next_cpu ) \ |
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__field( unsigned char, prev_prio ) \ __field( unsigned char, prev_state ) \ |
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__field( unsigned char, next_prio ) \ |
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__field( unsigned char, next_state ) |
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FTRACE_ENTRY(context_switch, ctx_switch_entry, TRACE_CTX, F_STRUCT( FTRACE_CTX_FIELDS ), |
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F_printk("%u:%u:%u ==> %u:%u:%u [%03u]", |
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__entry->prev_pid, __entry->prev_prio, __entry->prev_state, __entry->next_pid, __entry->next_prio, __entry->next_state, |
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__entry->next_cpu), FILTER_OTHER |
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); /* * FTRACE_ENTRY_DUP only creates the format file, it will not * create another structure. */ FTRACE_ENTRY_DUP(wakeup, ctx_switch_entry, TRACE_WAKE, F_STRUCT( FTRACE_CTX_FIELDS ), F_printk("%u:%u:%u ==+ %u:%u:%u [%03u]", __entry->prev_pid, __entry->prev_prio, __entry->prev_state, __entry->next_pid, __entry->next_prio, __entry->next_state, |
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__entry->next_cpu), FILTER_OTHER |
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); /* |
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* Stack-trace entry: */ #define FTRACE_STACK_ENTRIES 8 |
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#ifndef CONFIG_64BIT # define IP_FMT "%08lx" #else # define IP_FMT "%016lx" #endif |
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FTRACE_ENTRY(kernel_stack, stack_entry, TRACE_STACK, F_STRUCT( |
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__field( int, size ) __dynamic_array(unsigned long, caller ) |
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), |
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F_printk("\t=> (" IP_FMT ") \t=> (" IP_FMT ") \t=> (" IP_FMT ") " "\t=> (" IP_FMT ") \t=> (" IP_FMT ") \t=> (" IP_FMT ") " "\t=> (" IP_FMT ") \t=> (" IP_FMT ") ", |
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__entry->caller[0], __entry->caller[1], __entry->caller[2], __entry->caller[3], __entry->caller[4], __entry->caller[5], |
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__entry->caller[6], __entry->caller[7]), FILTER_OTHER |
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); FTRACE_ENTRY(user_stack, userstack_entry, TRACE_USER_STACK, F_STRUCT( __field( unsigned int, tgid ) __array( unsigned long, caller, FTRACE_STACK_ENTRIES ) ), |
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F_printk("\t=> (" IP_FMT ") \t=> (" IP_FMT ") \t=> (" IP_FMT ") " "\t=> (" IP_FMT ") \t=> (" IP_FMT ") \t=> (" IP_FMT ") " "\t=> (" IP_FMT ") \t=> (" IP_FMT ") ", |
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__entry->caller[0], __entry->caller[1], __entry->caller[2], __entry->caller[3], __entry->caller[4], __entry->caller[5], |
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__entry->caller[6], __entry->caller[7]), FILTER_OTHER |
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); /* * trace_printk entry: */ FTRACE_ENTRY(bprint, bprint_entry, TRACE_BPRINT, F_STRUCT( __field( unsigned long, ip ) __field( const char *, fmt ) __dynamic_array( u32, buf ) ), |
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F_printk("%pf: %s", (void *)__entry->ip, __entry->fmt), |
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FILTER_OTHER |
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); FTRACE_ENTRY(print, print_entry, TRACE_PRINT, F_STRUCT( __field( unsigned long, ip ) __dynamic_array( char, buf ) ), |
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F_printk("%pf: %s", (void *)__entry->ip, __entry->buf), FILTER_OTHER ); FTRACE_ENTRY(bputs, bputs_entry, TRACE_BPUTS, F_STRUCT( __field( unsigned long, ip ) __field( const char *, str ) ), F_printk("%pf: %s", (void *)__entry->ip, __entry->str), |
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FILTER_OTHER |
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); FTRACE_ENTRY(mmiotrace_rw, trace_mmiotrace_rw, TRACE_MMIO_RW, F_STRUCT( |
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__field_struct( struct mmiotrace_rw, rw ) __field_desc( resource_size_t, rw, phys ) __field_desc( unsigned long, rw, value ) __field_desc( unsigned long, rw, pc ) __field_desc( int, rw, map_id ) __field_desc( unsigned char, rw, opcode ) __field_desc( unsigned char, rw, width ) |
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), |
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F_printk("%lx %lx %lx %d %x %x", (unsigned long)__entry->phys, __entry->value, __entry->pc, |
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__entry->map_id, __entry->opcode, __entry->width), FILTER_OTHER |
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); FTRACE_ENTRY(mmiotrace_map, trace_mmiotrace_map, TRACE_MMIO_MAP, F_STRUCT( |
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__field_struct( struct mmiotrace_map, map ) __field_desc( resource_size_t, map, phys ) __field_desc( unsigned long, map, virt ) __field_desc( unsigned long, map, len ) __field_desc( int, map, map_id ) __field_desc( unsigned char, map, opcode ) |
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), |
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F_printk("%lx %lx %lx %d %x", (unsigned long)__entry->phys, __entry->virt, __entry->len, |
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__entry->map_id, __entry->opcode), FILTER_OTHER |
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); |
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#define TRACE_FUNC_SIZE 30 #define TRACE_FILE_SIZE 20 FTRACE_ENTRY(branch, trace_branch, TRACE_BRANCH, F_STRUCT( __field( unsigned int, line ) __array( char, func, TRACE_FUNC_SIZE+1 ) __array( char, file, TRACE_FILE_SIZE+1 ) __field( char, correct ) ), F_printk("%u:%s:%s (%u)", __entry->line, |
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__entry->func, __entry->file, __entry->correct), FILTER_OTHER |
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); |