402 lines
10 KiB
C
402 lines
10 KiB
C
/* SPDX-License-Identifier: GPL-2.0 */
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#ifndef __PERF_SYMBOL
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#define __PERF_SYMBOL 1
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#include <linux/types.h>
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#include <stdbool.h>
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#include <stdint.h>
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#include "map.h"
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#include "../perf.h"
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#include <linux/list.h>
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#include <linux/rbtree.h>
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#include <stdio.h>
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#include <byteswap.h>
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#include <libgen.h>
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#include "build-id.h"
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#include "event.h"
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#include "path.h"
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#ifdef HAVE_LIBELF_SUPPORT
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#include <libelf.h>
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#include <gelf.h>
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#endif
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#include <elf.h>
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#include "dso.h"
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/*
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* libelf 0.8.x and earlier do not support ELF_C_READ_MMAP;
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* for newer versions we can use mmap to reduce memory usage:
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*/
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#ifdef HAVE_LIBELF_MMAP_SUPPORT
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# define PERF_ELF_C_READ_MMAP ELF_C_READ_MMAP
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#else
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# define PERF_ELF_C_READ_MMAP ELF_C_READ
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#endif
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#ifdef HAVE_LIBELF_SUPPORT
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Elf_Scn *elf_section_by_name(Elf *elf, GElf_Ehdr *ep,
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GElf_Shdr *shp, const char *name, size_t *idx);
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#endif
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#ifndef DMGL_PARAMS
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#define DMGL_NO_OPTS 0 /* For readability... */
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#define DMGL_PARAMS (1 << 0) /* Include function args */
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#define DMGL_ANSI (1 << 1) /* Include const, volatile, etc */
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#endif
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#define DSO__NAME_KALLSYMS "[kernel.kallsyms]"
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#define DSO__NAME_KCORE "[kernel.kcore]"
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/** struct symbol - symtab entry
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*
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* @ignore - resolvable but tools ignore it (e.g. idle routines)
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*/
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struct symbol {
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struct rb_node rb_node;
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u64 start;
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u64 end;
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u16 namelen;
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u8 type:4;
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u8 binding:4;
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u8 idle:1;
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u8 ignore:1;
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u8 inlined:1;
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u8 arch_sym;
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char name[0];
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};
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void symbol__delete(struct symbol *sym);
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void symbols__delete(struct rb_root *symbols);
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/* symbols__for_each_entry - iterate over symbols (rb_root)
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*
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* @symbols: the rb_root of symbols
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* @pos: the 'struct symbol *' to use as a loop cursor
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* @nd: the 'struct rb_node *' to use as a temporary storage
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*/
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#define symbols__for_each_entry(symbols, pos, nd) \
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for (nd = rb_first(symbols); \
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nd && (pos = rb_entry(nd, struct symbol, rb_node)); \
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nd = rb_next(nd))
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static inline size_t symbol__size(const struct symbol *sym)
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{
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return sym->end - sym->start;
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}
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struct strlist;
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struct intlist;
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struct symbol_conf {
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unsigned short priv_size;
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bool try_vmlinux_path,
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init_annotation,
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force,
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ignore_vmlinux,
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ignore_vmlinux_buildid,
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show_kernel_path,
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use_modules,
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allow_aliases,
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sort_by_name,
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show_nr_samples,
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show_total_period,
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use_callchain,
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cumulate_callchain,
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show_branchflag_count,
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exclude_other,
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show_cpu_utilization,
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initialized,
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kptr_restrict,
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event_group,
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demangle,
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demangle_kernel,
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filter_relative,
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show_hist_headers,
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branch_callstack,
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has_filter,
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show_ref_callgraph,
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hide_unresolved,
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raw_trace,
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report_hierarchy,
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inline_name;
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const char *vmlinux_name,
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*kallsyms_name,
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*source_prefix,
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*field_sep,
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*graph_function;
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const char *default_guest_vmlinux_name,
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*default_guest_kallsyms,
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*default_guest_modules;
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const char *guestmount;
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const char *dso_list_str,
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*comm_list_str,
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*pid_list_str,
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*tid_list_str,
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*sym_list_str,
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*col_width_list_str,
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*bt_stop_list_str;
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struct strlist *dso_list,
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*comm_list,
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*sym_list,
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*dso_from_list,
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*dso_to_list,
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*sym_from_list,
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*sym_to_list,
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*bt_stop_list;
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struct intlist *pid_list,
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*tid_list;
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const char *symfs;
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};
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extern struct symbol_conf symbol_conf;
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struct symbol_name_rb_node {
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struct rb_node rb_node;
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struct symbol sym;
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};
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static inline int __symbol__join_symfs(char *bf, size_t size, const char *path)
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{
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return path__join(bf, size, symbol_conf.symfs, path);
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}
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#define symbol__join_symfs(bf, path) __symbol__join_symfs(bf, sizeof(bf), path)
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extern int vmlinux_path__nr_entries;
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extern char **vmlinux_path;
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static inline void *symbol__priv(struct symbol *sym)
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{
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return ((void *)sym) - symbol_conf.priv_size;
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}
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struct ref_reloc_sym {
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const char *name;
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u64 addr;
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u64 unrelocated_addr;
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};
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struct map_symbol {
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struct map *map;
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struct symbol *sym;
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};
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struct addr_map_symbol {
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struct map *map;
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struct symbol *sym;
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u64 addr;
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u64 al_addr;
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u64 phys_addr;
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};
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struct branch_info {
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struct addr_map_symbol from;
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struct addr_map_symbol to;
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struct branch_flags flags;
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char *srcline_from;
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char *srcline_to;
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};
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struct mem_info {
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struct addr_map_symbol iaddr;
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struct addr_map_symbol daddr;
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union perf_mem_data_src data_src;
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refcount_t refcnt;
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};
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struct addr_location {
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struct machine *machine;
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struct thread *thread;
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struct map *map;
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struct symbol *sym;
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const char *srcline;
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u64 addr;
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char level;
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u8 filtered;
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u8 cpumode;
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s32 cpu;
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s32 socket;
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};
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struct symsrc {
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char *name;
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int fd;
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enum dso_binary_type type;
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#ifdef HAVE_LIBELF_SUPPORT
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Elf *elf;
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GElf_Ehdr ehdr;
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Elf_Scn *opdsec;
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size_t opdidx;
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GElf_Shdr opdshdr;
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Elf_Scn *symtab;
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GElf_Shdr symshdr;
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Elf_Scn *dynsym;
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size_t dynsym_idx;
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GElf_Shdr dynshdr;
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bool adjust_symbols;
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bool is_64_bit;
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#endif
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};
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void symsrc__destroy(struct symsrc *ss);
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int symsrc__init(struct symsrc *ss, struct dso *dso, const char *name,
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enum dso_binary_type type);
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bool symsrc__has_symtab(struct symsrc *ss);
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bool symsrc__possibly_runtime(struct symsrc *ss);
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int dso__load(struct dso *dso, struct map *map);
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int dso__load_vmlinux(struct dso *dso, struct map *map,
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const char *vmlinux, bool vmlinux_allocated);
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int dso__load_vmlinux_path(struct dso *dso, struct map *map);
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int __dso__load_kallsyms(struct dso *dso, const char *filename, struct map *map,
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bool no_kcore);
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int dso__load_kallsyms(struct dso *dso, const char *filename, struct map *map);
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void dso__insert_symbol(struct dso *dso,
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struct symbol *sym);
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struct symbol *dso__find_symbol(struct dso *dso, u64 addr);
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struct symbol *dso__find_symbol_by_name(struct dso *dso, const char *name);
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struct symbol *symbol__next_by_name(struct symbol *sym);
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struct symbol *dso__first_symbol(struct dso *dso);
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struct symbol *dso__last_symbol(struct dso *dso);
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struct symbol *dso__next_symbol(struct symbol *sym);
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enum dso_type dso__type_fd(int fd);
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int filename__read_build_id(const char *filename, void *bf, size_t size);
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int sysfs__read_build_id(const char *filename, void *bf, size_t size);
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int modules__parse(const char *filename, void *arg,
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int (*process_module)(void *arg, const char *name,
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u64 start, u64 size));
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int filename__read_debuglink(const char *filename, char *debuglink,
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size_t size);
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struct perf_env;
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int symbol__init(struct perf_env *env);
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void symbol__exit(void);
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void symbol__elf_init(void);
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int symbol__annotation_init(void);
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struct symbol *symbol__new(u64 start, u64 len, u8 binding, u8 type, const char *name);
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size_t __symbol__fprintf_symname_offs(const struct symbol *sym,
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const struct addr_location *al,
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bool unknown_as_addr,
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bool print_offsets, FILE *fp);
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size_t symbol__fprintf_symname_offs(const struct symbol *sym,
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const struct addr_location *al, FILE *fp);
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size_t __symbol__fprintf_symname(const struct symbol *sym,
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const struct addr_location *al,
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bool unknown_as_addr, FILE *fp);
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size_t symbol__fprintf_symname(const struct symbol *sym, FILE *fp);
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size_t symbol__fprintf(struct symbol *sym, FILE *fp);
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bool symbol__restricted_filename(const char *filename,
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const char *restricted_filename);
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int symbol__config_symfs(const struct option *opt __maybe_unused,
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const char *dir, int unset __maybe_unused);
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int dso__load_sym(struct dso *dso, struct map *map, struct symsrc *syms_ss,
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struct symsrc *runtime_ss, int kmodule);
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int dso__synthesize_plt_symbols(struct dso *dso, struct symsrc *ss);
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char *dso__demangle_sym(struct dso *dso, int kmodule, const char *elf_name);
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void __symbols__insert(struct rb_root *symbols, struct symbol *sym, bool kernel);
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void symbols__insert(struct rb_root *symbols, struct symbol *sym);
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void symbols__fixup_duplicate(struct rb_root *symbols);
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void symbols__fixup_end(struct rb_root *symbols);
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void map_groups__fixup_end(struct map_groups *mg);
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typedef int (*mapfn_t)(u64 start, u64 len, u64 pgoff, void *data);
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int file__read_maps(int fd, bool exe, mapfn_t mapfn, void *data,
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bool *is_64_bit);
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#define PERF_KCORE_EXTRACT "/tmp/perf-kcore-XXXXXX"
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struct kcore_extract {
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char *kcore_filename;
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u64 addr;
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u64 offs;
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u64 len;
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char extract_filename[sizeof(PERF_KCORE_EXTRACT)];
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int fd;
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};
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int kcore_extract__create(struct kcore_extract *kce);
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void kcore_extract__delete(struct kcore_extract *kce);
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int kcore_copy(const char *from_dir, const char *to_dir);
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int compare_proc_modules(const char *from, const char *to);
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int setup_list(struct strlist **list, const char *list_str,
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const char *list_name);
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int setup_intlist(struct intlist **list, const char *list_str,
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const char *list_name);
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#ifdef HAVE_LIBELF_SUPPORT
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bool elf__needs_adjust_symbols(GElf_Ehdr ehdr);
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void arch__sym_update(struct symbol *s, GElf_Sym *sym);
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#endif
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const char *arch__normalize_symbol_name(const char *name);
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#define SYMBOL_A 0
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#define SYMBOL_B 1
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int arch__compare_symbol_names(const char *namea, const char *nameb);
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int arch__compare_symbol_names_n(const char *namea, const char *nameb,
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unsigned int n);
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int arch__choose_best_symbol(struct symbol *syma, struct symbol *symb);
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enum symbol_tag_include {
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SYMBOL_TAG_INCLUDE__NONE = 0,
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SYMBOL_TAG_INCLUDE__DEFAULT_ONLY
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};
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int symbol__match_symbol_name(const char *namea, const char *nameb,
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enum symbol_tag_include includes);
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/* structure containing an SDT note's info */
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struct sdt_note {
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char *name; /* name of the note*/
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char *provider; /* provider name */
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char *args;
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bool bit32; /* whether the location is 32 bits? */
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union { /* location, base and semaphore addrs */
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Elf64_Addr a64[3];
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Elf32_Addr a32[3];
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} addr;
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struct list_head note_list; /* SDT notes' list */
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};
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int get_sdt_note_list(struct list_head *head, const char *target);
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int cleanup_sdt_note_list(struct list_head *sdt_notes);
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int sdt_notes__get_count(struct list_head *start);
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#define SDT_BASE_SCN ".stapsdt.base"
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#define SDT_NOTE_SCN ".note.stapsdt"
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#define SDT_NOTE_TYPE 3
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#define SDT_NOTE_NAME "stapsdt"
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#define NR_ADDR 3
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struct mem_info *mem_info__new(void);
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struct mem_info *mem_info__get(struct mem_info *mi);
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void mem_info__put(struct mem_info *mi);
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static inline void __mem_info__zput(struct mem_info **mi)
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{
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mem_info__put(*mi);
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*mi = NULL;
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}
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#define mem_info__zput(mi) __mem_info__zput(&mi)
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#endif /* __PERF_SYMBOL */
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