| Author | Tokens | Token Proportion | Commits | Commit Proportion |
|---|---|---|---|---|
| Namhyung Kim | 820 | 52.87% | 9 | 33.33% |
| Srikar Dronamraju | 465 | 29.98% | 2 | 7.41% |
| Song Liu | 65 | 4.19% | 2 | 7.41% |
| Jovi Zhangwei | 58 | 3.74% | 1 | 3.70% |
| Masami Hiramatsu | 50 | 3.22% | 4 | 14.81% |
| Josef Bacik | 40 | 2.58% | 1 | 3.70% |
| Omar Sandoval | 34 | 2.19% | 1 | 3.70% |
| Steven Rostedt | 7 | 0.45% | 4 | 14.81% |
| Stephen Rothwell | 6 | 0.39% | 1 | 3.70% |
| Yaowei Bai | 4 | 0.26% | 1 | 3.70% |
| Anton Blanchard | 2 | 0.13% | 1 | 3.70% |
| Total | 1551 | 27 |
// SPDX-License-Identifier: GPL-2.0 /* * Common header file for probe-based Dynamic events. * * This code was copied from kernel/trace/trace_kprobe.h written by * Masami Hiramatsu <masami.hiramatsu.pt@hitachi.com> * * Updates to make this generic: * Copyright (C) IBM Corporation, 2010-2011 * Author: Srikar Dronamraju */ #include <linux/seq_file.h> #include <linux/slab.h> #include <linux/smp.h> #include <linux/tracefs.h> #include <linux/types.h> #include <linux/string.h> #include <linux/ctype.h> #include <linux/ptrace.h> #include <linux/perf_event.h> #include <linux/kprobes.h> #include <linux/stringify.h> #include <linux/limits.h> #include <linux/uaccess.h> #include <asm/bitsperlong.h> #include "trace.h" #include "trace_output.h" #define MAX_TRACE_ARGS 128 #define MAX_ARGSTR_LEN 63 #define MAX_STRING_SIZE PATH_MAX /* Reserved field names */ #define FIELD_STRING_IP "__probe_ip" #define FIELD_STRING_RETIP "__probe_ret_ip" #define FIELD_STRING_FUNC "__probe_func" #undef DEFINE_FIELD #define DEFINE_FIELD(type, item, name, is_signed) \ do { \ ret = trace_define_field(event_call, #type, name, \ offsetof(typeof(field), item), \ sizeof(field.item), is_signed, \ FILTER_OTHER); \ if (ret) \ return ret; \ } while (0) /* Flags for trace_probe */ #define TP_FLAG_TRACE 1 #define TP_FLAG_PROFILE 2 #define TP_FLAG_REGISTERED 4 /* data_rloc: data relative location, compatible with u32 */ #define make_data_rloc(len, roffs) \ (((u32)(len) << 16) | ((u32)(roffs) & 0xffff)) #define get_rloc_len(dl) ((u32)(dl) >> 16) #define get_rloc_offs(dl) ((u32)(dl) & 0xffff) /* * Convert data_rloc to data_loc: * data_rloc stores the offset from data_rloc itself, but data_loc * stores the offset from event entry. */ #define convert_rloc_to_loc(dl, offs) ((u32)(dl) + (offs)) static nokprobe_inline void *get_rloc_data(u32 *dl) { return (u8 *)dl + get_rloc_offs(*dl); } /* For data_loc conversion */ static nokprobe_inline void *get_loc_data(u32 *dl, void *ent) { return (u8 *)ent + get_rloc_offs(*dl); } /* Data fetch function type */ typedef void (*fetch_func_t)(struct pt_regs *, void *, void *); /* Printing function type */ typedef int (*print_type_func_t)(struct trace_seq *, const char *, void *, void *); /* Fetch types */ enum { FETCH_MTD_reg = 0, FETCH_MTD_stack, FETCH_MTD_retval, FETCH_MTD_comm, FETCH_MTD_memory, FETCH_MTD_symbol, FETCH_MTD_deref, FETCH_MTD_bitfield, FETCH_MTD_file_offset, FETCH_MTD_END, }; /* Fetch type information table */ struct fetch_type { const char *name; /* Name of type */ size_t size; /* Byte size of type */ int is_signed; /* Signed flag */ print_type_func_t print; /* Print functions */ const char *fmt; /* Fromat string */ const char *fmttype; /* Name in format file */ /* Fetch functions */ fetch_func_t fetch[FETCH_MTD_END]; }; struct fetch_param { fetch_func_t fn; void *data; }; /* For defining macros, define string/string_size types */ typedef u32 string; typedef u32 string_size; #define PRINT_TYPE_FUNC_NAME(type) print_type_##type #define PRINT_TYPE_FMT_NAME(type) print_type_format_##type /* Printing in basic type function template */ #define DECLARE_BASIC_PRINT_TYPE_FUNC(type) \ int PRINT_TYPE_FUNC_NAME(type)(struct trace_seq *s, const char *name, \ void *data, void *ent); \ extern const char PRINT_TYPE_FMT_NAME(type)[] DECLARE_BASIC_PRINT_TYPE_FUNC(u8); DECLARE_BASIC_PRINT_TYPE_FUNC(u16); DECLARE_BASIC_PRINT_TYPE_FUNC(u32); DECLARE_BASIC_PRINT_TYPE_FUNC(u64); DECLARE_BASIC_PRINT_TYPE_FUNC(s8); DECLARE_BASIC_PRINT_TYPE_FUNC(s16); DECLARE_BASIC_PRINT_TYPE_FUNC(s32); DECLARE_BASIC_PRINT_TYPE_FUNC(s64); DECLARE_BASIC_PRINT_TYPE_FUNC(x8); DECLARE_BASIC_PRINT_TYPE_FUNC(x16); DECLARE_BASIC_PRINT_TYPE_FUNC(x32); DECLARE_BASIC_PRINT_TYPE_FUNC(x64); DECLARE_BASIC_PRINT_TYPE_FUNC(string); #define FETCH_FUNC_NAME(method, type) fetch_##method##_##type /* Declare macro for basic types */ #define DECLARE_FETCH_FUNC(method, type) \ extern void FETCH_FUNC_NAME(method, type)(struct pt_regs *regs, \ void *data, void *dest) #define DECLARE_BASIC_FETCH_FUNCS(method) \ DECLARE_FETCH_FUNC(method, u8); \ DECLARE_FETCH_FUNC(method, u16); \ DECLARE_FETCH_FUNC(method, u32); \ DECLARE_FETCH_FUNC(method, u64) DECLARE_BASIC_FETCH_FUNCS(reg); #define fetch_reg_string NULL #define fetch_reg_string_size NULL DECLARE_BASIC_FETCH_FUNCS(retval); #define fetch_retval_string NULL #define fetch_retval_string_size NULL DECLARE_BASIC_FETCH_FUNCS(symbol); DECLARE_FETCH_FUNC(symbol, string); DECLARE_FETCH_FUNC(symbol, string_size); DECLARE_BASIC_FETCH_FUNCS(deref); DECLARE_FETCH_FUNC(deref, string); DECLARE_FETCH_FUNC(deref, string_size); DECLARE_BASIC_FETCH_FUNCS(bitfield); #define fetch_bitfield_string NULL #define fetch_bitfield_string_size NULL /* comm only makes sense as a string */ #define fetch_comm_u8 NULL #define fetch_comm_u16 NULL #define fetch_comm_u32 NULL #define fetch_comm_u64 NULL DECLARE_FETCH_FUNC(comm, string); DECLARE_FETCH_FUNC(comm, string_size); /* * Define macro for basic types - we don't need to define s* types, because * we have to care only about bitwidth at recording time. */ #define DEFINE_BASIC_FETCH_FUNCS(method) \ DEFINE_FETCH_##method(u8) \ DEFINE_FETCH_##method(u16) \ DEFINE_FETCH_##method(u32) \ DEFINE_FETCH_##method(u64) /* Default (unsigned long) fetch type */ #define __DEFAULT_FETCH_TYPE(t) x##t #define _DEFAULT_FETCH_TYPE(t) __DEFAULT_FETCH_TYPE(t) #define DEFAULT_FETCH_TYPE _DEFAULT_FETCH_TYPE(BITS_PER_LONG) #define DEFAULT_FETCH_TYPE_STR __stringify(DEFAULT_FETCH_TYPE) #define ASSIGN_FETCH_FUNC(method, type) \ [FETCH_MTD_##method] = FETCH_FUNC_NAME(method, type) #define __ASSIGN_FETCH_TYPE(_name, ptype, ftype, _size, sign, _fmttype) \ {.name = _name, \ .size = _size, \ .is_signed = sign, \ .print = PRINT_TYPE_FUNC_NAME(ptype), \ .fmt = PRINT_TYPE_FMT_NAME(ptype), \ .fmttype = _fmttype, \ .fetch = { \ ASSIGN_FETCH_FUNC(reg, ftype), \ ASSIGN_FETCH_FUNC(stack, ftype), \ ASSIGN_FETCH_FUNC(retval, ftype), \ ASSIGN_FETCH_FUNC(comm, ftype), \ ASSIGN_FETCH_FUNC(memory, ftype), \ ASSIGN_FETCH_FUNC(symbol, ftype), \ ASSIGN_FETCH_FUNC(deref, ftype), \ ASSIGN_FETCH_FUNC(bitfield, ftype), \ ASSIGN_FETCH_FUNC(file_offset, ftype), \ } \ } #define ASSIGN_FETCH_TYPE(ptype, ftype, sign) \ __ASSIGN_FETCH_TYPE(#ptype, ptype, ftype, sizeof(ftype), sign, #ptype) /* If ptype is an alias of atype, use this macro (show atype in format) */ #define ASSIGN_FETCH_TYPE_ALIAS(ptype, atype, ftype, sign) \ __ASSIGN_FETCH_TYPE(#ptype, ptype, ftype, sizeof(ftype), sign, #atype) #define ASSIGN_FETCH_TYPE_END {} #define FETCH_TYPE_STRING 0 #define FETCH_TYPE_STRSIZE 1 #ifdef CONFIG_KPROBE_EVENTS struct symbol_cache; unsigned long update_symbol_cache(struct symbol_cache *sc); void free_symbol_cache(struct symbol_cache *sc); struct symbol_cache *alloc_symbol_cache(const char *sym, long offset); bool trace_kprobe_on_func_entry(struct trace_event_call *call); bool trace_kprobe_error_injectable(struct trace_event_call *call); #else /* uprobes do not support symbol fetch methods */ #define fetch_symbol_u8 NULL #define fetch_symbol_u16 NULL #define fetch_symbol_u32 NULL #define fetch_symbol_u64 NULL #define fetch_symbol_string NULL #define fetch_symbol_string_size NULL struct symbol_cache { }; static inline unsigned long __used update_symbol_cache(struct symbol_cache *sc) { return 0; } static inline void __used free_symbol_cache(struct symbol_cache *sc) { } static inline struct symbol_cache * __used alloc_symbol_cache(const char *sym, long offset) { return NULL; } static inline bool trace_kprobe_on_func_entry(struct trace_event_call *call) { return false; } static inline bool trace_kprobe_error_injectable(struct trace_event_call *call) { return false; } #endif /* CONFIG_KPROBE_EVENTS */ struct probe_arg { struct fetch_param fetch; struct fetch_param fetch_size; unsigned int offset; /* Offset from argument entry */ const char *name; /* Name of this argument */ const char *comm; /* Command of this argument */ const struct fetch_type *type; /* Type of this argument */ }; struct trace_probe { unsigned int flags; /* For TP_FLAG_* */ struct trace_event_class class; struct trace_event_call call; struct list_head files; ssize_t size; /* trace entry size */ unsigned int nr_args; struct probe_arg args[]; }; struct event_file_link { struct trace_event_file *file; struct list_head list; }; static inline bool trace_probe_is_enabled(struct trace_probe *tp) { return !!(tp->flags & (TP_FLAG_TRACE | TP_FLAG_PROFILE)); } static inline bool trace_probe_is_registered(struct trace_probe *tp) { return !!(tp->flags & TP_FLAG_REGISTERED); } static nokprobe_inline void call_fetch(struct fetch_param *fprm, struct pt_regs *regs, void *dest) { return fprm->fn(regs, fprm->data, dest); } /* Check the name is good for event/group/fields */ static inline bool is_good_name(const char *name) { if (!isalpha(*name) && *name != '_') return false; while (*++name != '\0') { if (!isalpha(*name) && !isdigit(*name) && *name != '_') return false; } return true; } static inline struct event_file_link * find_event_file_link(struct trace_probe *tp, struct trace_event_file *file) { struct event_file_link *link; list_for_each_entry(link, &tp->files, list) if (link->file == file) return link; return NULL; } extern int traceprobe_parse_probe_arg(char *arg, ssize_t *size, struct probe_arg *parg, bool is_return, bool is_kprobe, const struct fetch_type *ftbl); extern int traceprobe_conflict_field_name(const char *name, struct probe_arg *args, int narg); extern void traceprobe_update_arg(struct probe_arg *arg); extern void traceprobe_free_probe_arg(struct probe_arg *arg); extern int traceprobe_split_symbol_offset(char *symbol, long *offset); /* Sum up total data length for dynamic arraies (strings) */ static nokprobe_inline int __get_data_size(struct trace_probe *tp, struct pt_regs *regs) { int i, ret = 0; u32 len; for (i = 0; i < tp->nr_args; i++) if (unlikely(tp->args[i].fetch_size.fn)) { call_fetch(&tp->args[i].fetch_size, regs, &len); ret += len; } return ret; } /* Store the value of each argument */ static nokprobe_inline void store_trace_args(int ent_size, struct trace_probe *tp, struct pt_regs *regs, u8 *data, int maxlen) { int i; u32 end = tp->size; u32 *dl; /* Data (relative) location */ for (i = 0; i < tp->nr_args; i++) { if (unlikely(tp->args[i].fetch_size.fn)) { /* * First, we set the relative location and * maximum data length to *dl */ dl = (u32 *)(data + tp->args[i].offset); *dl = make_data_rloc(maxlen, end - tp->args[i].offset); /* Then try to fetch string or dynamic array data */ call_fetch(&tp->args[i].fetch, regs, dl); /* Reduce maximum length */ end += get_rloc_len(*dl); maxlen -= get_rloc_len(*dl); /* Trick here, convert data_rloc to data_loc */ *dl = convert_rloc_to_loc(*dl, ent_size + tp->args[i].offset); } else /* Just fetching data normally */ call_fetch(&tp->args[i].fetch, regs, data + tp->args[i].offset); } } extern int set_print_fmt(struct trace_probe *tp, bool is_return); #ifdef CONFIG_PERF_EVENTS extern struct trace_event_call * create_local_trace_kprobe(char *func, void *addr, unsigned long offs, bool is_return); extern void destroy_local_trace_kprobe(struct trace_event_call *event_call); extern struct trace_event_call * create_local_trace_uprobe(char *name, unsigned long offs, bool is_return); extern void destroy_local_trace_uprobe(struct trace_event_call *event_call); #endif
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