![Adrian Hunter](/assets/img/avatar_default.png)
In the absence of vmlinux, perf tools uses kallsyms for symbols. If the user has access, now also map to /proc/kcore. The dso data_type is now set to either DSO_BINARY_TYPE__KCORE or DSO_BINARY_TYPE__GUEST_KCORE as approprite. This patch breaks the "vmlinux symtab matches kallsyms" test. That is fixed in a following patch. Signed-off-by: Adrian Hunter <adrian.hunter@intel.com> Cc: David Ahern <dsahern@gmail.com> Cc: Frederic Weisbecker <fweisbec@gmail.com> Cc: Ingo Molnar <mingo@kernel.org> Cc: Jiri Olsa <jolsa@redhat.com> Cc: Mike Galbraith <efault@gmx.de> Cc: Namhyung Kim <namhyung@gmail.com> Cc: Paul Mackerras <paulus@samba.org> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Stephane Eranian <eranian@google.com> Link: http://lkml.kernel.org/r/1375875537-4509-8-git-send-email-adrian.hunter@intel.com Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
256 lines
6.1 KiB
C
256 lines
6.1 KiB
C
#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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#ifdef 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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#ifdef HAVE_CPLUS_DEMANGLE
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extern char *cplus_demangle(const char *, int);
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static inline char *bfd_demangle(void __maybe_unused *v, const char *c, int i)
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{
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return cplus_demangle(c, i);
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}
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#else
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#ifdef NO_DEMANGLE
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static inline char *bfd_demangle(void __maybe_unused *v,
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const char __maybe_unused *c,
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int __maybe_unused i)
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{
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return NULL;
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}
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#else
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#define PACKAGE 'perf'
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#include <bfd.h>
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#endif
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#endif
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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 LIBELF_MMAP
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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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#ifndef DMGL_PARAMS
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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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/** 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 binding;
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bool ignore;
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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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static inline size_t symbol__size(const struct symbol *sym)
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{
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return sym->end - sym->start + 1;
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}
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struct strlist;
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struct symbol_conf {
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unsigned short priv_size;
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unsigned short nr_events;
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bool try_vmlinux_path,
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show_kernel_path,
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use_modules,
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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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exclude_other,
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show_cpu_utilization,
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initialized,
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kptr_restrict,
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annotate_asm_raw,
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annotate_src,
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event_group,
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demangle;
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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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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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*sym_list_str,
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*col_width_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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const char *symfs;
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};
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extern struct symbol_conf symbol_conf;
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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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bool unfolded;
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bool has_children;
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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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};
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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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};
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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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};
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struct addr_location {
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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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u64 addr;
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char level;
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bool filtered;
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u8 cpumode;
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s32 cpu;
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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 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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#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, symbol_filter_t filter);
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int dso__load_vmlinux(struct dso *dso, struct map *map,
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const char *vmlinux, symbol_filter_t filter);
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int dso__load_vmlinux_path(struct dso *dso, struct map *map,
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symbol_filter_t filter);
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int dso__load_kallsyms(struct dso *dso, const char *filename, struct map *map,
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symbol_filter_t filter);
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struct symbol *dso__find_symbol(struct dso *dso, enum map_type type,
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u64 addr);
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struct symbol *dso__find_symbol_by_name(struct dso *dso, enum map_type type,
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const char *name);
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struct symbol *dso__first_symbol(struct dso *dso, enum map_type type);
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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 kallsyms__parse(const char *filename, void *arg,
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int (*process_symbol)(void *arg, const char *name,
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char type, u64 start));
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int filename__read_debuglink(const char *filename, char *debuglink,
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size_t size);
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int symbol__init(void);
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void symbol__exit(void);
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void symbol__elf_init(void);
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struct symbol *symbol__new(u64 start, u64 len, u8 binding, 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, 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_type__is_a(char symbol_type, enum map_type map_type);
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bool symbol__restricted_filename(const char *filename,
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const char *restricted_filename);
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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, symbol_filter_t filter,
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int kmodule);
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int dso__synthesize_plt_symbols(struct dso *dso, struct symsrc *ss,
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struct map *map, symbol_filter_t filter);
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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, enum map_type type);
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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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#endif /* __PERF_SYMBOL */
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