| Author | Tokens | Token Proportion | Commits | Commit Proportion |
|---|---|---|---|---|
| Arnaldo Carvalho de Melo | 8805 | 44.29% | 193 | 41.96% |
| Namhyung Kim | 3638 | 18.30% | 56 | 12.17% |
| Jiri Olsa | 1799 | 9.05% | 55 | 11.96% |
| Ian Rogers | 862 | 4.34% | 20 | 4.35% |
| Andi Kleen | 858 | 4.32% | 9 | 1.96% |
| Song Liu | 846 | 4.26% | 7 | 1.52% |
| Jin Yao | 580 | 2.92% | 13 | 2.83% |
| Ravi Bangoria | 381 | 1.92% | 11 | 2.39% |
| Peter Zijlstra | 373 | 1.88% | 4 | 0.87% |
| Adrian Hunter | 329 | 1.65% | 10 | 2.17% |
| Martin Liška | 209 | 1.05% | 6 | 1.30% |
| Kim Phillips | 194 | 0.98% | 3 | 0.65% |
| Ingo Molnar | 143 | 0.72% | 7 | 1.52% |
| Taeung Song | 127 | 0.64% | 12 | 2.61% |
| James Clark | 96 | 0.48% | 1 | 0.22% |
| Frédéric Weisbecker | 62 | 0.31% | 6 | 1.30% |
| Rabin Vincent | 51 | 0.26% | 2 | 0.43% |
| Christian Bornträger | 36 | 0.18% | 2 | 0.43% |
| Chris Ryder | 35 | 0.18% | 1 | 0.22% |
| Alex Converse | 33 | 0.17% | 1 | 0.22% |
| David S. Miller | 31 | 0.16% | 1 | 0.22% |
| Vincent Whitchurch | 29 | 0.15% | 1 | 0.22% |
| Thomas Richter | 29 | 0.15% | 3 | 0.65% |
| Numfor Mbiziwo-Tiapo | 28 | 0.14% | 1 | 0.22% |
| David Ahern | 26 | 0.13% | 1 | 0.22% |
| Stéphane Eranian | 25 | 0.13% | 2 | 0.43% |
| Greg Price | 21 | 0.11% | 1 | 0.22% |
| Naveen N. Rao | 21 | 0.11% | 1 | 0.22% |
| Rui Y Wang | 16 | 0.08% | 1 | 0.22% |
| Mike Galbraith | 16 | 0.08% | 2 | 0.43% |
| Mao Han | 15 | 0.08% | 1 | 0.22% |
| Frederik Deweerdt | 15 | 0.08% | 1 | 0.22% |
| Eugeniy Paltsev | 15 | 0.08% | 1 | 0.22% |
| William Cohen | 15 | 0.08% | 1 | 0.22% |
| Huacai Chen | 14 | 0.07% | 1 | 0.22% |
| Russell King | 12 | 0.06% | 1 | 0.22% |
| Li Huafei | 11 | 0.06% | 1 | 0.22% |
| Thadeu Lima de Souza Cascardo | 11 | 0.06% | 1 | 0.22% |
| Dengcheng Zhu | 9 | 0.05% | 1 | 0.22% |
| Dave Marchevsky | 8 | 0.04% | 1 | 0.22% |
| Li Wei | 7 | 0.04% | 1 | 0.22% |
| John Kacur | 6 | 0.03% | 1 | 0.22% |
| Maciek Borzecki | 6 | 0.03% | 1 | 0.22% |
| Irina Tirdea | 6 | 0.03% | 2 | 0.43% |
| Andres Freund | 6 | 0.03% | 1 | 0.22% |
| Michael Petlan | 5 | 0.03% | 1 | 0.22% |
| Dario Petrillo | 3 | 0.02% | 1 | 0.22% |
| Kirill Smelkov | 3 | 0.02% | 1 | 0.22% |
| Gustavo A. R. Silva | 3 | 0.02% | 1 | 0.22% |
| Sukadev Bhattiprolu | 3 | 0.02% | 1 | 0.22% |
| Thomas Gleixner | 2 | 0.01% | 1 | 0.22% |
| Milian Wolff | 2 | 0.01% | 1 | 0.22% |
| Leo Yan | 2 | 0.01% | 1 | 0.22% |
| Krister Johansen | 2 | 0.01% | 1 | 0.22% |
| Masami Hiramatsu | 1 | 0.01% | 1 | 0.22% |
| Josh Poimboeuf | 1 | 0.01% | 1 | 0.22% |
| Total | 19882 | 460 |
// SPDX-License-Identifier: GPL-2.0-only /* * Copyright (C) 2011, Red Hat Inc, Arnaldo Carvalho de Melo <acme@redhat.com> * * Parts came from builtin-annotate.c, see those files for further * copyright notes. */ #include <errno.h> #include <inttypes.h> #include <libgen.h> #include <stdlib.h> #include "util.h" // hex_width() #include "ui/ui.h" #include "sort.h" #include "build-id.h" #include "color.h" #include "config.h" #include "dso.h" #include "env.h" #include "map.h" #include "maps.h" #include "symbol.h" #include "srcline.h" #include "units.h" #include "debug.h" #include "annotate.h" #include "annotate-data.h" #include "evsel.h" #include "evlist.h" #include "bpf-event.h" #include "bpf-utils.h" #include "block-range.h" #include "string2.h" #include "dwarf-regs.h" #include "util/event.h" #include "util/sharded_mutex.h" #include "arch/common.h" #include "namespaces.h" #include "thread.h" #include "hashmap.h" #include <regex.h> #include <linux/bitops.h> #include <linux/kernel.h> #include <linux/string.h> #include <linux/zalloc.h> #include <subcmd/parse-options.h> #include <subcmd/run-command.h> /* FIXME: For the HE_COLORSET */ #include "ui/browser.h" /* * FIXME: Using the same values as slang.h, * but that header may not be available everywhere */ #define LARROW_CHAR ((unsigned char)',') #define RARROW_CHAR ((unsigned char)'+') #define DARROW_CHAR ((unsigned char)'.') #define UARROW_CHAR ((unsigned char)'-') #include <linux/ctype.h> /* global annotation options */ struct annotation_options annotate_opts; static regex_t file_lineno; static struct ins_ops *ins__find(struct arch *arch, const char *name); static void ins__sort(struct arch *arch); static int disasm_line__parse(char *line, const char **namep, char **rawp); static int call__scnprintf(struct ins *ins, char *bf, size_t size, struct ins_operands *ops, int max_ins_name); static int jump__scnprintf(struct ins *ins, char *bf, size_t size, struct ins_operands *ops, int max_ins_name); struct arch { const char *name; struct ins *instructions; size_t nr_instructions; size_t nr_instructions_allocated; struct ins_ops *(*associate_instruction_ops)(struct arch *arch, const char *name); bool sorted_instructions; bool initialized; const char *insn_suffix; void *priv; unsigned int model; unsigned int family; int (*init)(struct arch *arch, char *cpuid); bool (*ins_is_fused)(struct arch *arch, const char *ins1, const char *ins2); struct { char comment_char; char skip_functions_char; char register_char; char memory_ref_char; } objdump; }; static struct ins_ops call_ops; static struct ins_ops dec_ops; static struct ins_ops jump_ops; static struct ins_ops mov_ops; static struct ins_ops nop_ops; static struct ins_ops lock_ops; static struct ins_ops ret_ops; /* Data type collection debug statistics */ struct annotated_data_stat ann_data_stat; LIST_HEAD(ann_insn_stat); /* Pseudo data types */ struct annotated_data_type stackop_type = { .self = { .type_name = (char *)"(stack operation)", .children = LIST_HEAD_INIT(stackop_type.self.children), }, }; static int arch__grow_instructions(struct arch *arch) { struct ins *new_instructions; size_t new_nr_allocated; if (arch->nr_instructions_allocated == 0 && arch->instructions) goto grow_from_non_allocated_table; new_nr_allocated = arch->nr_instructions_allocated + 128; new_instructions = realloc(arch->instructions, new_nr_allocated * sizeof(struct ins)); if (new_instructions == NULL) return -1; out_update_instructions: arch->instructions = new_instructions; arch->nr_instructions_allocated = new_nr_allocated; return 0; grow_from_non_allocated_table: new_nr_allocated = arch->nr_instructions + 128; new_instructions = calloc(new_nr_allocated, sizeof(struct ins)); if (new_instructions == NULL) return -1; memcpy(new_instructions, arch->instructions, arch->nr_instructions); goto out_update_instructions; } static int arch__associate_ins_ops(struct arch* arch, const char *name, struct ins_ops *ops) { struct ins *ins; if (arch->nr_instructions == arch->nr_instructions_allocated && arch__grow_instructions(arch)) return -1; ins = &arch->instructions[arch->nr_instructions]; ins->name = strdup(name); if (!ins->name) return -1; ins->ops = ops; arch->nr_instructions++; ins__sort(arch); return 0; } #include "arch/arc/annotate/instructions.c" #include "arch/arm/annotate/instructions.c" #include "arch/arm64/annotate/instructions.c" #include "arch/csky/annotate/instructions.c" #include "arch/loongarch/annotate/instructions.c" #include "arch/mips/annotate/instructions.c" #include "arch/x86/annotate/instructions.c" #include "arch/powerpc/annotate/instructions.c" #include "arch/riscv64/annotate/instructions.c" #include "arch/s390/annotate/instructions.c" #include "arch/sparc/annotate/instructions.c" static struct arch architectures[] = { { .name = "arc", .init = arc__annotate_init, }, { .name = "arm", .init = arm__annotate_init, }, { .name = "arm64", .init = arm64__annotate_init, }, { .name = "csky", .init = csky__annotate_init, }, { .name = "mips", .init = mips__annotate_init, .objdump = { .comment_char = '#', }, }, { .name = "x86", .init = x86__annotate_init, .instructions = x86__instructions, .nr_instructions = ARRAY_SIZE(x86__instructions), .insn_suffix = "bwlq", .objdump = { .comment_char = '#', .register_char = '%', .memory_ref_char = '(', }, }, { .name = "powerpc", .init = powerpc__annotate_init, }, { .name = "riscv64", .init = riscv64__annotate_init, }, { .name = "s390", .init = s390__annotate_init, .objdump = { .comment_char = '#', }, }, { .name = "sparc", .init = sparc__annotate_init, .objdump = { .comment_char = '#', }, }, { .name = "loongarch", .init = loongarch__annotate_init, .objdump = { .comment_char = '#', }, }, }; static void ins__delete(struct ins_operands *ops) { if (ops == NULL) return; zfree(&ops->source.raw); zfree(&ops->source.name); zfree(&ops->target.raw); zfree(&ops->target.name); } static int ins__raw_scnprintf(struct ins *ins, char *bf, size_t size, struct ins_operands *ops, int max_ins_name) { return scnprintf(bf, size, "%-*s %s", max_ins_name, ins->name, ops->raw); } int ins__scnprintf(struct ins *ins, char *bf, size_t size, struct ins_operands *ops, int max_ins_name) { if (ins->ops->scnprintf) return ins->ops->scnprintf(ins, bf, size, ops, max_ins_name); return ins__raw_scnprintf(ins, bf, size, ops, max_ins_name); } bool ins__is_fused(struct arch *arch, const char *ins1, const char *ins2) { if (!arch || !arch->ins_is_fused) return false; return arch->ins_is_fused(arch, ins1, ins2); } static int call__parse(struct arch *arch, struct ins_operands *ops, struct map_symbol *ms) { char *endptr, *tok, *name; struct map *map = ms->map; struct addr_map_symbol target = { .ms = { .map = map, }, }; ops->target.addr = strtoull(ops->raw, &endptr, 16); name = strchr(endptr, '<'); if (name == NULL) goto indirect_call; name++; if (arch->objdump.skip_functions_char && strchr(name, arch->objdump.skip_functions_char)) return -1; tok = strchr(name, '>'); if (tok == NULL) return -1; *tok = '\0'; ops->target.name = strdup(name); *tok = '>'; if (ops->target.name == NULL) return -1; find_target: target.addr = map__objdump_2mem(map, ops->target.addr); if (maps__find_ams(ms->maps, &target) == 0 && map__rip_2objdump(target.ms.map, map__map_ip(target.ms.map, target.addr)) == ops->target.addr) ops->target.sym = target.ms.sym; return 0; indirect_call: tok = strchr(endptr, '*'); if (tok != NULL) { endptr++; /* Indirect call can use a non-rip register and offset: callq *0x8(%rbx). * Do not parse such instruction. */ if (strstr(endptr, "(%r") == NULL) ops->target.addr = strtoull(endptr, NULL, 16); } goto find_target; } static int call__scnprintf(struct ins *ins, char *bf, size_t size, struct ins_operands *ops, int max_ins_name) { if (ops->target.sym) return scnprintf(bf, size, "%-*s %s", max_ins_name, ins->name, ops->target.sym->name); if (ops->target.addr == 0) return ins__raw_scnprintf(ins, bf, size, ops, max_ins_name); if (ops->target.name) return scnprintf(bf, size, "%-*s %s", max_ins_name, ins->name, ops->target.name); return scnprintf(bf, size, "%-*s *%" PRIx64, max_ins_name, ins->name, ops->target.addr); } static struct ins_ops call_ops = { .parse = call__parse, .scnprintf = call__scnprintf, }; bool ins__is_call(const struct ins *ins) { return ins->ops == &call_ops || ins->ops == &s390_call_ops || ins->ops == &loongarch_call_ops; } /* * Prevents from matching commas in the comment section, e.g.: * ffff200008446e70: b.cs ffff2000084470f4 <generic_exec_single+0x314> // b.hs, b.nlast * * and skip comma as part of function arguments, e.g.: * 1d8b4ac <linemap_lookup(line_maps const*, unsigned int)+0xcc> */ static inline const char *validate_comma(const char *c, struct ins_operands *ops) { if (ops->jump.raw_comment && c > ops->jump.raw_comment) return NULL; if (ops->jump.raw_func_start && c > ops->jump.raw_func_start) return NULL; return c; } static int jump__parse(struct arch *arch, struct ins_operands *ops, struct map_symbol *ms) { struct map *map = ms->map; struct symbol *sym = ms->sym; struct addr_map_symbol target = { .ms = { .map = map, }, }; const char *c = strchr(ops->raw, ','); u64 start, end; ops->jump.raw_comment = strchr(ops->raw, arch->objdump.comment_char); ops->jump.raw_func_start = strchr(ops->raw, '<'); c = validate_comma(c, ops); /* * Examples of lines to parse for the _cpp_lex_token@@Base * function: * * 1159e6c: jne 115aa32 <_cpp_lex_token@@Base+0xf92> * 1159e8b: jne c469be <cpp_named_operator2name@@Base+0xa72> * * The first is a jump to an offset inside the same function, * the second is to another function, i.e. that 0xa72 is an * offset in the cpp_named_operator2name@@base function. */ /* * skip over possible up to 2 operands to get to address, e.g.: * tbnz w0, #26, ffff0000083cd190 <security_file_permission+0xd0> */ if (c++ != NULL) { ops->target.addr = strtoull(c, NULL, 16); if (!ops->target.addr) { c = strchr(c, ','); c = validate_comma(c, ops); if (c++ != NULL) ops->target.addr = strtoull(c, NULL, 16); } } else { ops->target.addr = strtoull(ops->raw, NULL, 16); } target.addr = map__objdump_2mem(map, ops->target.addr); start = map__unmap_ip(map, sym->start); end = map__unmap_ip(map, sym->end); ops->target.outside = target.addr < start || target.addr > end; /* * FIXME: things like this in _cpp_lex_token (gcc's cc1 program): cpp_named_operator2name@@Base+0xa72 * Point to a place that is after the cpp_named_operator2name * boundaries, i.e. in the ELF symbol table for cc1 * cpp_named_operator2name is marked as being 32-bytes long, but it in * fact is much larger than that, so we seem to need a symbols__find() * routine that looks for >= current->start and < next_symbol->start, * possibly just for C++ objects? * * For now lets just make some progress by marking jumps to outside the * current function as call like. * * Actual navigation will come next, with further understanding of how * the symbol searching and disassembly should be done. */ if (maps__find_ams(ms->maps, &target) == 0 && map__rip_2objdump(target.ms.map, map__map_ip(target.ms.map, target.addr)) == ops->target.addr) ops->target.sym = target.ms.sym; if (!ops->target.outside) { ops->target.offset = target.addr - start; ops->target.offset_avail = true; } else { ops->target.offset_avail = false; } return 0; } static int jump__scnprintf(struct ins *ins, char *bf, size_t size, struct ins_operands *ops, int max_ins_name) { const char *c; if (!ops->target.addr || ops->target.offset < 0) return ins__raw_scnprintf(ins, bf, size, ops, max_ins_name); if (ops->target.outside && ops->target.sym != NULL) return scnprintf(bf, size, "%-*s %s", max_ins_name, ins->name, ops->target.sym->name); c = strchr(ops->raw, ','); c = validate_comma(c, ops); if (c != NULL) { const char *c2 = strchr(c + 1, ','); c2 = validate_comma(c2, ops); /* check for 3-op insn */ if (c2 != NULL) c = c2; c++; /* mirror arch objdump's space-after-comma style */ if (*c == ' ') c++; } return scnprintf(bf, size, "%-*s %.*s%" PRIx64, max_ins_name, ins->name, c ? c - ops->raw : 0, ops->raw, ops->target.offset); } static void jump__delete(struct ins_operands *ops __maybe_unused) { /* * The ops->jump.raw_comment and ops->jump.raw_func_start belong to the * raw string, don't free them. */ } static struct ins_ops jump_ops = { .free = jump__delete, .parse = jump__parse, .scnprintf = jump__scnprintf, }; bool ins__is_jump(const struct ins *ins) { return ins->ops == &jump_ops || ins->ops == &loongarch_jump_ops; } static int comment__symbol(char *raw, char *comment, u64 *addrp, char **namep) { char *endptr, *name, *t; if (strstr(raw, "(%rip)") == NULL) return 0; *addrp = strtoull(comment, &endptr, 16); if (endptr == comment) return 0; name = strchr(endptr, '<'); if (name == NULL) return -1; name++; t = strchr(name, '>'); if (t == NULL) return 0; *t = '\0'; *namep = strdup(name); *t = '>'; return 0; } static int lock__parse(struct arch *arch, struct ins_operands *ops, struct map_symbol *ms) { ops->locked.ops = zalloc(sizeof(*ops->locked.ops)); if (ops->locked.ops == NULL) return 0; if (disasm_line__parse(ops->raw, &ops->locked.ins.name, &ops->locked.ops->raw) < 0) goto out_free_ops; ops->locked.ins.ops = ins__find(arch, ops->locked.ins.name); if (ops->locked.ins.ops == NULL) goto out_free_ops; if (ops->locked.ins.ops->parse && ops->locked.ins.ops->parse(arch, ops->locked.ops, ms) < 0) goto out_free_ops; return 0; out_free_ops: zfree(&ops->locked.ops); return 0; } static int lock__scnprintf(struct ins *ins, char *bf, size_t size, struct ins_operands *ops, int max_ins_name) { int printed; if (ops->locked.ins.ops == NULL) return ins__raw_scnprintf(ins, bf, size, ops, max_ins_name); printed = scnprintf(bf, size, "%-*s ", max_ins_name, ins->name); return printed + ins__scnprintf(&ops->locked.ins, bf + printed, size - printed, ops->locked.ops, max_ins_name); } static void lock__delete(struct ins_operands *ops) { struct ins *ins = &ops->locked.ins; if (ins->ops && ins->ops->free) ins->ops->free(ops->locked.ops); else ins__delete(ops->locked.ops); zfree(&ops->locked.ops); zfree(&ops->target.raw); zfree(&ops->target.name); } static struct ins_ops lock_ops = { .free = lock__delete, .parse = lock__parse, .scnprintf = lock__scnprintf, }; /* * Check if the operand has more than one registers like x86 SIB addressing: * 0x1234(%rax, %rbx, 8) * * But it doesn't care segment selectors like %gs:0x5678(%rcx), so just check * the input string after 'memory_ref_char' if exists. */ static bool check_multi_regs(struct arch *arch, const char *op) { int count = 0; if (arch->objdump.register_char == 0) return false; if (arch->objdump.memory_ref_char) { op = strchr(op, arch->objdump.memory_ref_char); if (op == NULL) return false; } while ((op = strchr(op, arch->objdump.register_char)) != NULL) { count++; op++; } return count > 1; } static int mov__parse(struct arch *arch, struct ins_operands *ops, struct map_symbol *ms __maybe_unused) { char *s = strchr(ops->raw, ','), *target, *comment, prev; if (s == NULL) return -1; *s = '\0'; /* * x86 SIB addressing has something like 0x8(%rax, %rcx, 1) * then it needs to have the closing parenthesis. */ if (strchr(ops->raw, '(')) { *s = ','; s = strchr(ops->raw, ')'); if (s == NULL || s[1] != ',') return -1; *++s = '\0'; } ops->source.raw = strdup(ops->raw); *s = ','; if (ops->source.raw == NULL) return -1; ops->source.multi_regs = check_multi_regs(arch, ops->source.raw); target = skip_spaces(++s); comment = strchr(s, arch->objdump.comment_char); if (comment != NULL) s = comment - 1; else s = strchr(s, '\0') - 1; while (s > target && isspace(s[0])) --s; s++; prev = *s; *s = '\0'; ops->target.raw = strdup(target); *s = prev; if (ops->target.raw == NULL) goto out_free_source; ops->target.multi_regs = check_multi_regs(arch, ops->target.raw); if (comment == NULL) return 0; comment = skip_spaces(comment); comment__symbol(ops->source.raw, comment + 1, &ops->source.addr, &ops->source.name); comment__symbol(ops->target.raw, comment + 1, &ops->target.addr, &ops->target.name); return 0; out_free_source: zfree(&ops->source.raw); return -1; } static int mov__scnprintf(struct ins *ins, char *bf, size_t size, struct ins_operands *ops, int max_ins_name) { return scnprintf(bf, size, "%-*s %s,%s", max_ins_name, ins->name, ops->source.name ?: ops->source.raw, ops->target.name ?: ops->target.raw); } static struct ins_ops mov_ops = { .parse = mov__parse, .scnprintf = mov__scnprintf, }; static int dec__parse(struct arch *arch __maybe_unused, struct ins_operands *ops, struct map_symbol *ms __maybe_unused) { char *target, *comment, *s, prev; target = s = ops->raw; while (s[0] != '\0' && !isspace(s[0])) ++s; prev = *s; *s = '\0'; ops->target.raw = strdup(target); *s = prev; if (ops->target.raw == NULL) return -1; comment = strchr(s, arch->objdump.comment_char); if (comment == NULL) return 0; comment = skip_spaces(comment); comment__symbol(ops->target.raw, comment + 1, &ops->target.addr, &ops->target.name); return 0; } static int dec__scnprintf(struct ins *ins, char *bf, size_t size, struct ins_operands *ops, int max_ins_name) { return scnprintf(bf, size, "%-*s %s", max_ins_name, ins->name, ops->target.name ?: ops->target.raw); } static struct ins_ops dec_ops = { .parse = dec__parse, .scnprintf = dec__scnprintf, }; static int nop__scnprintf(struct ins *ins __maybe_unused, char *bf, size_t size, struct ins_operands *ops __maybe_unused, int max_ins_name) { return scnprintf(bf, size, "%-*s", max_ins_name, "nop"); } static struct ins_ops nop_ops = { .scnprintf = nop__scnprintf, }; static struct ins_ops ret_ops = { .scnprintf = ins__raw_scnprintf, }; bool ins__is_ret(const struct ins *ins) { return ins->ops == &ret_ops; } bool ins__is_lock(const struct ins *ins) { return ins->ops == &lock_ops; } static int ins__key_cmp(const void *name, const void *insp) { const struct ins *ins = insp; return strcmp(name, ins->name); } static int ins__cmp(const void *a, const void *b) { const struct ins *ia = a; const struct ins *ib = b; return strcmp(ia->name, ib->name); } static void ins__sort(struct arch *arch) { const int nmemb = arch->nr_instructions; qsort(arch->instructions, nmemb, sizeof(struct ins), ins__cmp); } static struct ins_ops *__ins__find(struct arch *arch, const char *name) { struct ins *ins; const int nmemb = arch->nr_instructions; if (!arch->sorted_instructions) { ins__sort(arch); arch->sorted_instructions = true; } ins = bsearch(name, arch->instructions, nmemb, sizeof(struct ins), ins__key_cmp); if (ins) return ins->ops; if (arch->insn_suffix) { char tmp[32]; char suffix; size_t len = strlen(name); if (len == 0 || len >= sizeof(tmp)) return NULL; suffix = name[len - 1]; if (strchr(arch->insn_suffix, suffix) == NULL) return NULL; strcpy(tmp, name); tmp[len - 1] = '\0'; /* remove the suffix and check again */ ins = bsearch(tmp, arch->instructions, nmemb, sizeof(struct ins), ins__key_cmp); } return ins ? ins->ops : NULL; } static struct ins_ops *ins__find(struct arch *arch, const char *name) { struct ins_ops *ops = __ins__find(arch, name); if (!ops && arch->associate_instruction_ops) ops = arch->associate_instruction_ops(arch, name); return ops; } static int arch__key_cmp(const void *name, const void *archp) { const struct arch *arch = archp; return strcmp(name, arch->name); } static int arch__cmp(const void *a, const void *b) { const struct arch *aa = a; const struct arch *ab = b; return strcmp(aa->name, ab->name); } static void arch__sort(void) { const int nmemb = ARRAY_SIZE(architectures); qsort(architectures, nmemb, sizeof(struct arch), arch__cmp); } static struct arch *arch__find(const char *name) { const int nmemb = ARRAY_SIZE(architectures); static bool sorted; if (!sorted) { arch__sort(); sorted = true; } return bsearch(name, architectures, nmemb, sizeof(struct arch), arch__key_cmp); } bool arch__is(struct arch *arch, const char *name) { return !strcmp(arch->name, name); } /* symbol histogram: key = offset << 16 | evsel->core.idx */ static size_t sym_hist_hash(long key, void *ctx __maybe_unused) { return (key >> 16) + (key & 0xffff); } static bool sym_hist_equal(long key1, long key2, void *ctx __maybe_unused) { return key1 == key2; } static struct annotated_source *annotated_source__new(void) { struct annotated_source *src = zalloc(sizeof(*src)); if (src != NULL) INIT_LIST_HEAD(&src->source); return src; } static __maybe_unused void annotated_source__delete(struct annotated_source *src) { if (src == NULL) return; hashmap__free(src->samples); zfree(&src->histograms); free(src); } static int annotated_source__alloc_histograms(struct annotated_source *src, int nr_hists) { src->nr_histograms = nr_hists; src->histograms = calloc(nr_hists, sizeof(*src->histograms)); if (src->histograms == NULL) return -1; src->samples = hashmap__new(sym_hist_hash, sym_hist_equal, NULL); if (src->samples == NULL) zfree(&src->histograms); return src->histograms ? 0 : -1; } void symbol__annotate_zero_histograms(struct symbol *sym) { struct annotation *notes = symbol__annotation(sym); annotation__lock(notes); if (notes->src != NULL) { memset(notes->src->histograms, 0, notes->src->nr_histograms * sizeof(*notes->src->histograms)); hashmap__clear(notes->src->samples); } if (notes->branch && notes->branch->cycles_hist) { memset(notes->branch->cycles_hist, 0, symbol__size(sym) * sizeof(struct cyc_hist)); } annotation__unlock(notes); } static int __symbol__account_cycles(struct cyc_hist *ch, u64 start, unsigned offset, unsigned cycles, unsigned have_start) { /* * For now we can only account one basic block per * final jump. But multiple could be overlapping. * Always account the longest one. So when * a shorter one has been already seen throw it away. * * We separately always account the full cycles. */ ch[offset].num_aggr++; ch[offset].cycles_aggr += cycles; if (cycles > ch[offset].cycles_max) ch[offset].cycles_max = cycles; if (ch[offset].cycles_min) { if (cycles && cycles < ch[offset].cycles_min) ch[offset].cycles_min = cycles; } else ch[offset].cycles_min = cycles; if (!have_start && ch[offset].have_start) return 0; if (ch[offset].num) { if (have_start && (!ch[offset].have_start || ch[offset].start > start)) { ch[offset].have_start = 0; ch[offset].cycles = 0; ch[offset].num = 0; if (ch[offset].reset < 0xffff) ch[offset].reset++; } else if (have_start && ch[offset].start < start) return 0; } if (ch[offset].num < NUM_SPARKS) ch[offset].cycles_spark[ch[offset].num] = cycles; ch[offset].have_start = have_start; ch[offset].start = start; ch[offset].cycles += cycles; ch[offset].num++; return 0; } static int __symbol__inc_addr_samples(struct map_symbol *ms, struct annotated_source *src, int evidx, u64 addr, struct perf_sample *sample) { struct symbol *sym = ms->sym; long hash_key; u64 offset; struct sym_hist *h; struct sym_hist_entry *entry; pr_debug3("%s: addr=%#" PRIx64 "\n", __func__, map__unmap_ip(ms->map, addr)); if ((addr < sym->start || addr >= sym->end) && (addr != sym->end || sym->start != sym->end)) { pr_debug("%s(%d): ERANGE! sym->name=%s, start=%#" PRIx64 ", addr=%#" PRIx64 ", end=%#" PRIx64 "\n", __func__, __LINE__, sym->name, sym->start, addr, sym->end); return -ERANGE; } offset = addr - sym->start; h = annotated_source__histogram(src, evidx); if (h == NULL) { pr_debug("%s(%d): ENOMEM! sym->name=%s, start=%#" PRIx64 ", addr=%#" PRIx64 ", end=%#" PRIx64 ", func: %d\n", __func__, __LINE__, sym->name, sym->start, addr, sym->end, sym->type == STT_FUNC); return -ENOMEM; } hash_key = offset << 16 | evidx; if (!hashmap__find(src->samples, hash_key, &entry)) { entry = zalloc(sizeof(*entry)); if (entry == NULL) return -ENOMEM; if (hashmap__add(src->samples, hash_key, entry) < 0) return -ENOMEM; } h->nr_samples++; h->period += sample->period; entry->nr_samples++; entry->period += sample->period; pr_debug3("%#" PRIx64 " %s: period++ [addr: %#" PRIx64 ", %#" PRIx64 ", evidx=%d] => nr_samples: %" PRIu64 ", period: %" PRIu64 "\n", sym->start, sym->name, addr, addr - sym->start, evidx, entry->nr_samples, entry->period); return 0; } struct annotated_branch *annotation__get_branch(struct annotation *notes) { if (notes == NULL) return NULL; if (notes->branch == NULL) notes->branch = zalloc(sizeof(*notes->branch)); return notes->branch; } static struct cyc_hist *symbol__cycles_hist(struct symbol *sym) { struct annotation *notes = symbol__annotation(sym); struct annotated_branch *branch; branch = annotation__get_branch(notes); if (branch == NULL) return NULL; if (branch->cycles_hist == NULL) { const size_t size = symbol__size(sym); branch->cycles_hist = calloc(size, sizeof(struct cyc_hist)); } return branch->cycles_hist; } struct annotated_source *symbol__hists(struct symbol *sym, int nr_hists) { struct annotation *notes = symbol__annotation(sym); if (notes->src == NULL) { notes->src = annotated_source__new(); if (notes->src == NULL) return NULL; goto alloc_histograms; } if (notes->src->histograms == NULL) { alloc_histograms: annotated_source__alloc_histograms(notes->src, nr_hists); } return notes->src; } static int symbol__inc_addr_samples(struct map_symbol *ms, struct evsel *evsel, u64 addr, struct perf_sample *sample) { struct symbol *sym = ms->sym; struct annotated_source *src; if (sym == NULL) return 0; src = symbol__hists(sym, evsel->evlist->core.nr_entries); return src ? __symbol__inc_addr_samples(ms, src, evsel->core.idx, addr, sample) : 0; } static int symbol__account_cycles(u64 addr, u64 start, struct symbol *sym, unsigned cycles) { struct cyc_hist *cycles_hist; unsigned offset; if (sym == NULL) return 0; cycles_hist = symbol__cycles_hist(sym); if (cycles_hist == NULL) return -ENOMEM; if (addr < sym->start || addr >= sym->end) return -ERANGE; if (start) { if (start < sym->start || start >= sym->end) return -ERANGE; if (start >= addr) start = 0; } offset = addr - sym->start; return __symbol__account_cycles(cycles_hist, start ? start - sym->start : 0, offset, cycles, !!start); } int addr_map_symbol__account_cycles(struct addr_map_symbol *ams, struct addr_map_symbol *start, unsigned cycles) { u64 saddr = 0; int err; if (!cycles) return 0; /* * Only set start when IPC can be computed. We can only * compute it when the basic block is completely in a single * function. * Special case the case when the jump is elsewhere, but * it starts on the function start. */ if (start && (start->ms.sym == ams->ms.sym || (ams->ms.sym && start->addr == ams->ms.sym->start + map__start(ams->ms.map)))) saddr = start->al_addr; if (saddr == 0) pr_debug2("BB with bad start: addr %"PRIx64" start %"PRIx64" sym %"PRIx64" saddr %"PRIx64"\n", ams->addr, start ? start->addr : 0, ams->ms.sym ? ams->ms.sym->start + map__start(ams->ms.map) : 0, saddr); err = symbol__account_cycles(ams->al_addr, saddr, ams->ms.sym, cycles); if (err) pr_debug2("account_cycles failed %d\n", err); return err; } static unsigned annotation__count_insn(struct annotation *notes, u64 start, u64 end) { unsigned n_insn = 0; u64 offset; for (offset = start; offset <= end; offset++) { if (notes->src->offsets[offset]) n_insn++; } return n_insn; } static void annotated_branch__delete(struct annotated_branch *branch) { if (branch) { zfree(&branch->cycles_hist); free(branch); } } static void annotation__count_and_fill(struct annotation *notes, u64 start, u64 end, struct cyc_hist *ch) { unsigned n_insn; unsigned int cover_insn = 0; u64 offset; n_insn = annotation__count_insn(notes, start, end); if (n_insn && ch->num && ch->cycles) { struct annotated_branch *branch; float ipc = n_insn / ((double)ch->cycles / (double)ch->num); /* Hide data when there are too many overlaps. */ if (ch->reset >= 0x7fff) return; for (offset = start; offset <= end; offset++) { struct annotation_line *al = notes->src->offsets[offset]; if (al && al->cycles && al->cycles->ipc == 0.0) { al->cycles->ipc = ipc; cover_insn++; } } branch = annotation__get_branch(notes); if (cover_insn && branch) { branch->hit_cycles += ch->cycles; branch->hit_insn += n_insn * ch->num; branch->cover_insn += cover_insn; } } } static int annotation__compute_ipc(struct annotation *notes, size_t size) { int err = 0; s64 offset; if (!notes->branch || !notes->branch->cycles_hist) return 0; notes->branch->total_insn = annotation__count_insn(notes, 0, size - 1); notes->branch->hit_cycles = 0; notes->branch->hit_insn = 0; notes->branch->cover_insn = 0; annotation__lock(notes); for (offset = size - 1; offset >= 0; --offset) { struct cyc_hist *ch; ch = ¬es->branch->cycles_hist[offset]; if (ch && ch->cycles) { struct annotation_line *al; al = notes->src->offsets[offset]; if (al && al->cycles == NULL) { al->cycles = zalloc(sizeof(*al->cycles)); if (al->cycles == NULL) { err = ENOMEM; break; } } if (ch->have_start) annotation__count_and_fill(notes, ch->start, offset, ch); if (al && ch->num_aggr) { al->cycles->avg = ch->cycles_aggr / ch->num_aggr; al->cycles->max = ch->cycles_max; al->cycles->min = ch->cycles_min; } } } if (err) { while (++offset < (s64)size) { struct cyc_hist *ch = ¬es->branch->cycles_hist[offset]; if (ch && ch->cycles) { struct annotation_line *al = notes->src->offsets[offset]; if (al) zfree(&al->cycles); } } } annotation__unlock(notes); return 0; } int addr_map_symbol__inc_samples(struct addr_map_symbol *ams, struct perf_sample *sample, struct evsel *evsel) { return symbol__inc_addr_samples(&ams->ms, evsel, ams->al_addr, sample); } int hist_entry__inc_addr_samples(struct hist_entry *he, struct perf_sample *sample, struct evsel *evsel, u64 ip) { return symbol__inc_addr_samples(&he->ms, evsel, ip, sample); } static void disasm_line__init_ins(struct disasm_line *dl, struct arch *arch, struct map_symbol *ms) { dl->ins.ops = ins__find(arch, dl->ins.name); if (!dl->ins.ops) return; if (dl->ins.ops->parse && dl->ins.ops->parse(arch, &dl->ops, ms) < 0) dl->ins.ops = NULL; } static int disasm_line__parse(char *line, const char **namep, char **rawp) { char tmp, *name = skip_spaces(line); if (name[0] == '\0') return -1; *rawp = name + 1; while ((*rawp)[0] != '\0' && !isspace((*rawp)[0])) ++*rawp; tmp = (*rawp)[0]; (*rawp)[0] = '\0'; *namep = strdup(name); if (*namep == NULL) goto out; (*rawp)[0] = tmp; *rawp = strim(*rawp); return 0; out: return -1; } struct annotate_args { struct arch *arch; struct map_symbol ms; struct evsel *evsel; struct annotation_options *options; s64 offset; char *line; int line_nr; char *fileloc; }; static void annotation_line__init(struct annotation_line *al, struct annotate_args *args, int nr) { al->offset = args->offset; al->line = strdup(args->line); al->line_nr = args->line_nr; al->fileloc = args->fileloc; al->data_nr = nr; } static void annotation_line__exit(struct annotation_line *al) { zfree_srcline(&al->path); zfree(&al->line); zfree(&al->cycles); } static size_t disasm_line_size(int nr) { struct annotation_line *al; return (sizeof(struct disasm_line) + (sizeof(al->data[0]) * nr)); } /* * Allocating the disasm annotation line data with * following structure: * * ------------------------------------------- * struct disasm_line | struct annotation_line * ------------------------------------------- * * We have 'struct annotation_line' member as last member * of 'struct disasm_line' to have an easy access. */ static struct disasm_line *disasm_line__new(struct annotate_args *args) { struct disasm_line *dl = NULL; int nr = 1; if (evsel__is_group_event(args->evsel)) nr = args->evsel->core.nr_members; dl = zalloc(disasm_line_size(nr)); if (!dl) return NULL; annotation_line__init(&dl->al, args, nr); if (dl->al.line == NULL) goto out_delete; if (args->offset != -1) { if (disasm_line__parse(dl->al.line, &dl->ins.name, &dl->ops.raw) < 0) goto out_free_line; disasm_line__init_ins(dl, args->arch, &args->ms); } return dl; out_free_line: zfree(&dl->al.line); out_delete: free(dl); return NULL; } void disasm_line__free(struct disasm_line *dl) { if (dl->ins.ops && dl->ins.ops->free) dl->ins.ops->free(&dl->ops); else ins__delete(&dl->ops); zfree(&dl->ins.name); annotation_line__exit(&dl->al); free(dl); } int disasm_line__scnprintf(struct disasm_line *dl, char *bf, size_t size, bool raw, int max_ins_name) { if (raw || !dl->ins.ops) return scnprintf(bf, size, "%-*s %s", max_ins_name, dl->ins.name, dl->ops.raw); return ins__scnprintf(&dl->ins, bf, size, &dl->ops, max_ins_name); } void annotation__exit(struct annotation *notes) { annotated_source__delete(notes->src); annotated_branch__delete(notes->branch); } static struct sharded_mutex *sharded_mutex; static void annotation__init_sharded_mutex(void) { /* As many mutexes as there are CPUs. */ sharded_mutex = sharded_mutex__new(cpu__max_present_cpu().cpu); } static size_t annotation__hash(const struct annotation *notes) { return (size_t)notes; } static struct mutex *annotation__get_mutex(const struct annotation *notes) { static pthread_once_t once = PTHREAD_ONCE_INIT; pthread_once(&once, annotation__init_sharded_mutex); if (!sharded_mutex) return NULL; return sharded_mutex__get_mutex(sharded_mutex, annotation__hash(notes)); } void annotation__lock(struct annotation *notes) NO_THREAD_SAFETY_ANALYSIS { struct mutex *mutex = annotation__get_mutex(notes); if (mutex) mutex_lock(mutex); } void annotation__unlock(struct annotation *notes) NO_THREAD_SAFETY_ANALYSIS { struct mutex *mutex = annotation__get_mutex(notes); if (mutex) mutex_unlock(mutex); } bool annotation__trylock(struct annotation *notes) { struct mutex *mutex = annotation__get_mutex(notes); if (!mutex) return false; return mutex_trylock(mutex); } static void annotation_line__add(struct annotation_line *al, struct list_head *head) { list_add_tail(&al->node, head); } struct annotation_line * annotation_line__next(struct annotation_line *pos, struct list_head *head) { list_for_each_entry_continue(pos, head, node) if (pos->offset >= 0) return pos; return NULL; } static const char *annotate__address_color(struct block_range *br) { double cov = block_range__coverage(br); if (cov >= 0) { /* mark red for >75% coverage */ if (cov > 0.75) return PERF_COLOR_RED; /* mark dull for <1% coverage */ if (cov < 0.01) return PERF_COLOR_NORMAL; } return PERF_COLOR_MAGENTA; } static const char *annotate__asm_color(struct block_range *br) { double cov = block_range__coverage(br); if (cov >= 0) { /* mark dull for <1% coverage */ if (cov < 0.01) return PERF_COLOR_NORMAL; } return PERF_COLOR_BLUE; } static void annotate__branch_printf(struct block_range *br, u64 addr) { bool emit_comment = true; if (!br) return; #if 1 if (br->is_target && br->start == addr) { struct block_range *branch = br; double p; /* * Find matching branch to our target. */ while (!branch->is_branch) branch = block_range__next(branch); p = 100 *(double)br->entry / branch->coverage; if (p > 0.1) { if (emit_comment) { emit_comment = false; printf("\t#"); } /* * The percentage of coverage joined at this target in relation * to the next branch. */ printf(" +%.2f%%", p); } } #endif if (br->is_branch && br->end == addr) { double p = 100*(double)br->taken / br->coverage; if (p > 0.1) { if (emit_comment) { emit_comment = false; printf("\t#"); } /* * The percentage of coverage leaving at this branch, and * its prediction ratio. */ printf(" -%.2f%% (p:%.2f%%)", p, 100*(double)br->pred / br->taken); } } } static int disasm_line__print(struct disasm_line *dl, u64 start, int addr_fmt_width) { s64 offset = dl->al.offset; const u64 addr = start + offset; struct block_range *br; br = block_range__find(addr); color_fprintf(stdout, annotate__address_color(br), " %*" PRIx64 ":", addr_fmt_width, addr); color_fprintf(stdout, annotate__asm_color(br), "%s", dl->al.line); annotate__branch_printf(br, addr); return 0; } static int annotation_line__print(struct annotation_line *al, struct symbol *sym, u64 start, struct evsel *evsel, u64 len, int min_pcnt, int printed, int max_lines, struct annotation_line *queue, int addr_fmt_width, int percent_type) { struct disasm_line *dl = container_of(al, struct disasm_line, al); static const char *prev_line; if (al->offset != -1) { double max_percent = 0.0; int i, nr_percent = 1; const char *color; struct annotation *notes = symbol__annotation(sym); for (i = 0; i < al->data_nr; i++) { double percent; percent = annotation_data__percent(&al->data[i], percent_type); if (percent > max_percent) max_percent = percent; } if (al->data_nr > nr_percent) nr_percent = al->data_nr; if (max_percent < min_pcnt) return -1; if (max_lines && printed >= max_lines) return 1; if (queue != NULL) { list_for_each_entry_from(queue, ¬es->src->source, node) { if (queue == al) break; annotation_line__print(queue, sym, start, evsel, len, 0, 0, 1, NULL, addr_fmt_width, percent_type); } } color = get_percent_color(max_percent); for (i = 0; i < nr_percent; i++) { struct annotation_data *data = &al->data[i]; double percent; percent = annotation_data__percent(data, percent_type); color = get_percent_color(percent); if (symbol_conf.show_total_period) color_fprintf(stdout, color, " %11" PRIu64, data->he.period); else if (symbol_conf.show_nr_samples) color_fprintf(stdout, color, " %7" PRIu64, data->he.nr_samples); else color_fprintf(stdout, color, " %7.2f", percent); } printf(" : "); disasm_line__print(dl, start, addr_fmt_width); /* * Also color the filename and line if needed, with * the same color than the percentage. Don't print it * twice for close colored addr with the same filename:line */ if (al->path) { if (!prev_line || strcmp(prev_line, al->path)) { color_fprintf(stdout, color, " // %s", al->path); prev_line = al->path; } } printf("\n"); } else if (max_lines && printed >= max_lines) return 1; else { int width = symbol_conf.show_total_period ? 12 : 8; if (queue) return -1; if (evsel__is_group_event(evsel)) width *= evsel->core.nr_members; if (!*al->line) printf(" %*s:\n", width, " "); else printf(" %*s: %-*d %s\n", width, " ", addr_fmt_width, al->line_nr, al->line); } return 0; } /* * symbol__parse_objdump_line() parses objdump output (with -d --no-show-raw) * which looks like following * * 0000000000415500 <_init>: * 415500: sub $0x8,%rsp * 415504: mov 0x2f5ad5(%rip),%rax # 70afe0 <_DYNAMIC+0x2f8> * 41550b: test %rax,%rax * 41550e: je 415515 <_init+0x15> * 415510: callq 416e70 <__gmon_start__@plt> * 415515: add $0x8,%rsp * 415519: retq * * it will be parsed and saved into struct disasm_line as * <offset> <name> <ops.raw> * * The offset will be a relative offset from the start of the symbol and -1 * means that it's not a disassembly line so should be treated differently. * The ops.raw part will be parsed further according to type of the instruction. */ static int symbol__parse_objdump_line(struct symbol *sym, struct annotate_args *args, char *parsed_line, int *line_nr, char **fileloc) { struct map *map = args->ms.map; struct annotation *notes = symbol__annotation(sym); struct disasm_line *dl; char *tmp; s64 line_ip, offset = -1; regmatch_t match[2]; /* /filename:linenr ? Save line number and ignore. */ if (regexec(&file_lineno, parsed_line, 2, match, 0) == 0) { *line_nr = atoi(parsed_line + match[1].rm_so); free(*fileloc); *fileloc = strdup(parsed_line); return 0; } /* Process hex address followed by ':'. */ line_ip = strtoull(parsed_line, &tmp, 16); if (parsed_line != tmp && tmp[0] == ':' && tmp[1] != '\0') { u64 start = map__rip_2objdump(map, sym->start), end = map__rip_2objdump(map, sym->end); offset = line_ip - start; if ((u64)line_ip < start || (u64)line_ip >= end) offset = -1; else parsed_line = tmp + 1; } args->offset = offset; args->line = parsed_line; args->line_nr = *line_nr; args->fileloc = *fileloc; args->ms.sym = sym; dl = disasm_line__new(args); (*line_nr)++; if (dl == NULL) return -1; if (!disasm_line__has_local_offset(dl)) { dl->ops.target.offset = dl->ops.target.addr - map__rip_2objdump(map, sym->start); dl->ops.target.offset_avail = true; } /* kcore has no symbols, so add the call target symbol */ if (dl->ins.ops && ins__is_call(&dl->ins) && !dl->ops.target.sym) { struct addr_map_symbol target = { .addr = dl->ops.target.addr, .ms = { .map = map, }, }; if (!maps__find_ams(args->ms.maps, &target) && target.ms.sym->start == target.al_addr) dl->ops.target.sym = target.ms.sym; } annotation_line__add(&dl->al, ¬es->src->source); return 0; } static __attribute__((constructor)) void symbol__init_regexpr(void) { regcomp(&file_lineno, "^/[^:]+:([0-9]+)", REG_EXTENDED); } static void delete_last_nop(struct symbol *sym) { struct annotation *notes = symbol__annotation(sym); struct list_head *list = ¬es->src->source; struct disasm_line *dl; while (!list_empty(list)) { dl = list_entry(list->prev, struct disasm_line, al.node); if (dl->ins.ops) { if (dl->ins.ops != &nop_ops) return; } else { if (!strstr(dl->al.line, " nop ") && !strstr(dl->al.line, " nopl ") && !strstr(dl->al.line, " nopw ")) return; } list_del_init(&dl->al.node); disasm_line__free(dl); } } int symbol__strerror_disassemble(struct map_symbol *ms, int errnum, char *buf, size_t buflen) { struct dso *dso = map__dso(ms->map); BUG_ON(buflen == 0); if (errnum >= 0) { str_error_r(errnum, buf, buflen); return 0; } switch (errnum) { case SYMBOL_ANNOTATE_ERRNO__NO_VMLINUX: { char bf[SBUILD_ID_SIZE + 15] = " with build id "; char *build_id_msg = NULL; if (dso->has_build_id) { build_id__sprintf(&dso->bid, bf + 15); build_id_msg = bf; } scnprintf(buf, buflen, "No vmlinux file%s\nwas found in the path.\n\n" "Note that annotation using /proc/kcore requires CAP_SYS_RAWIO capability.\n\n" "Please use:\n\n" " perf buildid-cache -vu vmlinux\n\n" "or:\n\n" " --vmlinux vmlinux\n", build_id_msg ?: ""); } break; case SYMBOL_ANNOTATE_ERRNO__NO_LIBOPCODES_FOR_BPF: scnprintf(buf, buflen, "Please link with binutils's libopcode to enable BPF annotation"); break; case SYMBOL_ANNOTATE_ERRNO__ARCH_INIT_REGEXP: scnprintf(buf, buflen, "Problems with arch specific instruction name regular expressions."); break; case SYMBOL_ANNOTATE_ERRNO__ARCH_INIT_CPUID_PARSING: scnprintf(buf, buflen, "Problems while parsing the CPUID in the arch specific initialization."); break; case SYMBOL_ANNOTATE_ERRNO__BPF_INVALID_FILE: scnprintf(buf, buflen, "Invalid BPF file: %s.", dso->long_name); break; case SYMBOL_ANNOTATE_ERRNO__BPF_MISSING_BTF: scnprintf(buf, buflen, "The %s BPF file has no BTF section, compile with -g or use pahole -J.", dso->long_name); break; default: scnprintf(buf, buflen, "Internal error: Invalid %d error code\n", errnum); break; } return 0; } static int dso__disassemble_filename(struct dso *dso, char *filename, size_t filename_size) { char linkname[PATH_MAX]; char *build_id_filename; char *build_id_path = NULL; char *pos; int len; if (dso->symtab_type == DSO_BINARY_TYPE__KALLSYMS && !dso__is_kcore(dso)) return SYMBOL_ANNOTATE_ERRNO__NO_VMLINUX; build_id_filename = dso__build_id_filename(dso, NULL, 0, false); if (build_id_filename) { __symbol__join_symfs(filename, filename_size, build_id_filename); free(build_id_filename); } else { if (dso->has_build_id) return ENOMEM; goto fallback; } build_id_path = strdup(filename); if (!build_id_path) return ENOMEM; /* * old style build-id cache has name of XX/XXXXXXX.. while * new style has XX/XXXXXXX../{elf,kallsyms,vdso}. * extract the build-id part of dirname in the new style only. */ pos = strrchr(build_id_path, '/'); if (pos && strlen(pos) < SBUILD_ID_SIZE - 2) dirname(build_id_path); if (dso__is_kcore(dso)) goto fallback; len = readlink(build_id_path, linkname, sizeof(linkname) - 1); if (len < 0) goto fallback; linkname[len] = '\0'; if (strstr(linkname, DSO__NAME_KALLSYMS) || access(filename, R_OK)) { fallback: /* * If we don't have build-ids or the build-id file isn't in the * cache, or is just a kallsyms file, well, lets hope that this * DSO is the same as when 'perf record' ran. */ if (dso->kernel && dso->long_name[0] == '/') snprintf(filename, filename_size, "%s", dso->long_name); else __symbol__join_symfs(filename, filename_size, dso->long_name); mutex_lock(&dso->lock); if (access(filename, R_OK) && errno == ENOENT && dso->nsinfo) { char *new_name = dso__filename_with_chroot(dso, filename); if (new_name) { strlcpy(filename, new_name, filename_size); free(new_name); } } mutex_unlock(&dso->lock); } free(build_id_path); return 0; } #if defined(HAVE_LIBBFD_SUPPORT) && defined(HAVE_LIBBPF_SUPPORT) #define PACKAGE "perf" #include <bfd.h> #include <dis-asm.h> #include <bpf/bpf.h> #include <bpf/btf.h> #include <bpf/libbpf.h> #include <linux/btf.h> #include <tools/dis-asm-compat.h> static int symbol__disassemble_bpf(struct symbol *sym, struct annotate_args *args) { struct annotation *notes = symbol__annotation(sym); struct bpf_prog_linfo *prog_linfo = NULL; struct bpf_prog_info_node *info_node; int len = sym->end - sym->start; disassembler_ftype disassemble; struct map *map = args->ms.map; struct perf_bpil *info_linear; struct disassemble_info info; struct dso *dso = map__dso(map); int pc = 0, count, sub_id; struct btf *btf = NULL; char tpath[PATH_MAX]; size_t buf_size; int nr_skip = 0; char *buf; bfd *bfdf; int ret; FILE *s; if (dso->binary_type != DSO_BINARY_TYPE__BPF_PROG_INFO) return SYMBOL_ANNOTATE_ERRNO__BPF_INVALID_FILE; pr_debug("%s: handling sym %s addr %" PRIx64 " len %" PRIx64 "\n", __func__, sym->name, sym->start, sym->end - sym->start); memset(tpath, 0, sizeof(tpath)); perf_exe(tpath, sizeof(tpath)); bfdf = bfd_openr(tpath, NULL); if (bfdf == NULL) abort(); if (!bfd_check_format(bfdf, bfd_object)) abort(); s = open_memstream(&buf, &buf_size); if (!s) { ret = errno; goto out; } init_disassemble_info_compat(&info, s, (fprintf_ftype) fprintf, fprintf_styled); info.arch = bfd_get_arch(bfdf); info.mach = bfd_get_mach(bfdf); info_node = perf_env__find_bpf_prog_info(dso->bpf_prog.env, dso->bpf_prog.id); if (!info_node) { ret = SYMBOL_ANNOTATE_ERRNO__BPF_MISSING_BTF; goto out; } info_linear = info_node->info_linear; sub_id = dso->bpf_prog.sub_id; info.buffer = (void *)(uintptr_t)(info_linear->info.jited_prog_insns); info.buffer_length = info_linear->info.jited_prog_len; if (info_linear->info.nr_line_info) prog_linfo = bpf_prog_linfo__new(&info_linear->info); if (info_linear->info.btf_id) { struct btf_node *node; node = perf_env__find_btf(dso->bpf_prog.env, info_linear->info.btf_id); if (node) btf = btf__new((__u8 *)(node->data), node->data_size); } disassemble_init_for_target(&info); #ifdef DISASM_FOUR_ARGS_SIGNATURE disassemble = disassembler(info.arch, bfd_big_endian(bfdf), info.mach, bfdf); #else disassemble = disassembler(bfdf); #endif if (disassemble == NULL) abort(); fflush(s); do { const struct bpf_line_info *linfo = NULL; struct disasm_line *dl; size_t prev_buf_size; const char *srcline; u64 addr; addr = pc + ((u64 *)(uintptr_t)(info_linear->info.jited_ksyms))[sub_id]; count = disassemble(pc, &info); if (prog_linfo) linfo = bpf_prog_linfo__lfind_addr_func(prog_linfo, addr, sub_id, nr_skip); if (linfo && btf) { srcline = btf__name_by_offset(btf, linfo->line_off); nr_skip++; } else srcline = NULL; fprintf(s, "\n"); prev_buf_size = buf_size; fflush(s); if (!annotate_opts.hide_src_code && srcline) { args->offset = -1; args->line = strdup(srcline); args->line_nr = 0; args->fileloc = NULL; args->ms.sym = sym; dl = disasm_line__new(args); if (dl) { annotation_line__add(&dl->al, ¬es->src->source); } } args->offset = pc; args->line = buf + prev_buf_size; args->line_nr = 0; args->fileloc = NULL; args->ms.sym = sym; dl = disasm_line__new(args); if (dl) annotation_line__add(&dl->al, ¬es->src->source); pc += count; } while (count > 0 && pc < len); ret = 0; out: free(prog_linfo); btf__free(btf); fclose(s); bfd_close(bfdf); return ret; } #else // defined(HAVE_LIBBFD_SUPPORT) && defined(HAVE_LIBBPF_SUPPORT) static int symbol__disassemble_bpf(struct symbol *sym __maybe_unused, struct annotate_args *args __maybe_unused) { return SYMBOL_ANNOTATE_ERRNO__NO_LIBOPCODES_FOR_BPF; } #endif // defined(HAVE_LIBBFD_SUPPORT) && defined(HAVE_LIBBPF_SUPPORT) static int symbol__disassemble_bpf_image(struct symbol *sym, struct annotate_args *args) { struct annotation *notes = symbol__annotation(sym); struct disasm_line *dl; args->offset = -1; args->line = strdup("to be implemented"); args->line_nr = 0; args->fileloc = NULL; dl = disasm_line__new(args); if (dl) annotation_line__add(&dl->al, ¬es->src->source); zfree(&args->line); return 0; } /* * Possibly create a new version of line with tabs expanded. Returns the * existing or new line, storage is updated if a new line is allocated. If * allocation fails then NULL is returned. */ static char *expand_tabs(char *line, char **storage, size_t *storage_len) { size_t i, src, dst, len, new_storage_len, num_tabs; char *new_line; size_t line_len = strlen(line); for (num_tabs = 0, i = 0; i < line_len; i++) if (line[i] == '\t') num_tabs++; if (num_tabs == 0) return line; /* * Space for the line and '\0', less the leading and trailing * spaces. Each tab may introduce 7 additional spaces. */ new_storage_len = line_len + 1 + (num_tabs * 7); new_line = malloc(new_storage_len); if (new_line == NULL) { pr_err("Failure allocating memory for tab expansion\n"); return NULL; } /* * Copy regions starting at src and expand tabs. If there are two * adjacent tabs then 'src == i', the memcpy is of size 0 and the spaces * are inserted. */ for (i = 0, src = 0, dst = 0; i < line_len && num_tabs; i++) { if (line[i] == '\t') { len = i - src; memcpy(&new_line[dst], &line[src], len); dst += len; new_line[dst++] = ' '; while (dst % 8 != 0) new_line[dst++] = ' '; src = i + 1; num_tabs--; } } /* Expand the last region. */ len = line_len - src; memcpy(&new_line[dst], &line[src], len); dst += len; new_line[dst] = '\0'; free(*storage); *storage = new_line; *storage_len = new_storage_len; return new_line; } static int symbol__disassemble(struct symbol *sym, struct annotate_args *args) { struct annotation_options *opts = &annotate_opts; struct map *map = args->ms.map; struct dso *dso = map__dso(map); char *command; FILE *file; char symfs_filename[PATH_MAX]; struct kcore_extract kce; bool delete_extract = false; bool decomp = false; int lineno = 0; char *fileloc = NULL; int nline; char *line; size_t line_len; const char *objdump_argv[] = { "/bin/sh", "-c", NULL, /* Will be the objdump command to run. */ "--", NULL, /* Will be the symfs path. */ NULL, }; struct child_process objdump_process; int err = dso__disassemble_filename(dso, symfs_filename, sizeof(symfs_filename)); if (err) return err; pr_debug("%s: filename=%s, sym=%s, start=%#" PRIx64 ", end=%#" PRIx64 "\n", __func__, symfs_filename, sym->name, map__unmap_ip(map, sym->start), map__unmap_ip(map, sym->end)); pr_debug("annotating [%p] %30s : [%p] %30s\n", dso, dso->long_name, sym, sym->name); if (dso->binary_type == DSO_BINARY_TYPE__BPF_PROG_INFO) { return symbol__disassemble_bpf(sym, args); } else if (dso->binary_type == DSO_BINARY_TYPE__BPF_IMAGE) { return symbol__disassemble_bpf_image(sym, args); } else if (dso__is_kcore(dso)) { kce.kcore_filename = symfs_filename; kce.addr = map__rip_2objdump(map, sym->start); kce.offs = sym->start; kce.len = sym->end - sym->start; if (!kcore_extract__create(&kce)) { delete_extract = true; strlcpy(symfs_filename, kce.extract_filename, sizeof(symfs_filename)); } } else if (dso__needs_decompress(dso)) { char tmp[KMOD_DECOMP_LEN]; if (dso__decompress_kmodule_path(dso, symfs_filename, tmp, sizeof(tmp)) < 0) return -1; decomp = true; strcpy(symfs_filename, tmp); } err = asprintf(&command, "%s %s%s --start-address=0x%016" PRIx64 " --stop-address=0x%016" PRIx64 " %s -d %s %s %s %c%s%c %s%s -C \"$1\"", opts->objdump_path ?: "objdump", opts->disassembler_style ? "-M " : "", opts->disassembler_style ?: "", map__rip_2objdump(map, sym->start), map__rip_2objdump(map, sym->end), opts->show_linenr ? "-l" : "", opts->show_asm_raw ? "" : "--no-show-raw-insn", opts->annotate_src ? "-S" : "", opts->prefix ? "--prefix " : "", opts->prefix ? '"' : ' ', opts->prefix ?: "", opts->prefix ? '"' : ' ', opts->prefix_strip ? "--prefix-strip=" : "", opts->prefix_strip ?: ""); if (err < 0) { pr_err("Failure allocating memory for the command to run\n"); goto out_remove_tmp; } pr_debug("Executing: %s\n", command); objdump_argv[2] = command; objdump_argv[4] = symfs_filename; /* Create a pipe to read from for stdout */ memset(&objdump_process, 0, sizeof(objdump_process)); objdump_process.argv = objdump_argv; objdump_process.out = -1; objdump_process.err = -1; objdump_process.no_stderr = 1; if (start_command(&objdump_process)) { pr_err("Failure starting to run %s\n", command); err = -1; goto out_free_command; } file = fdopen(objdump_process.out, "r"); if (!file) { pr_err("Failure creating FILE stream for %s\n", command); /* * If we were using debug info should retry with * original binary. */ err = -1; goto out_close_stdout; } /* Storage for getline. */ line = NULL; line_len = 0; nline = 0; while (!feof(file)) { const char *match; char *expanded_line; if (getline(&line, &line_len, file) < 0 || !line) break; /* Skip lines containing "filename:" */ match = strstr(line, symfs_filename); if (match && match[strlen(symfs_filename)] == ':') continue; expanded_line = strim(line); expanded_line = expand_tabs(expanded_line, &line, &line_len); if (!expanded_line) break; /* * The source code line number (lineno) needs to be kept in * across calls to symbol__parse_objdump_line(), so that it * can associate it with the instructions till the next one. * See disasm_line__new() and struct disasm_line::line_nr. */ if (symbol__parse_objdump_line(sym, args, expanded_line, &lineno, &fileloc) < 0) break; nline++; } free(line); free(fileloc); err = finish_command(&objdump_process); if (err) pr_err("Error running %s\n", command); if (nline == 0) { err = -1; pr_err("No output from %s\n", command); } /* * kallsyms does not have symbol sizes so there may a nop at the end. * Remove it. */ if (dso__is_kcore(dso)) delete_last_nop(sym); fclose(file); out_close_stdout: close(objdump_process.out); out_free_command: free(command); out_remove_tmp: if (decomp) unlink(symfs_filename); if (delete_extract) kcore_extract__delete(&kce); return err; } static void calc_percent(struct annotation *notes, struct evsel *evsel, struct annotation_data *data, s64 offset, s64 end) { struct hists *hists = evsel__hists(evsel); int evidx = evsel->core.idx; struct sym_hist *sym_hist = annotation__histogram(notes, evidx); unsigned int hits = 0; u64 period = 0; while (offset < end) { struct sym_hist_entry *entry; entry = annotated_source__hist_entry(notes->src, evidx, offset); if (entry) { hits += entry->nr_samples; period += entry->period; } ++offset; } if (sym_hist->nr_samples) { data->he.period = period; data->he.nr_samples = hits; data->percent[PERCENT_HITS_LOCAL] = 100.0 * hits / sym_hist->nr_samples; } if (hists->stats.nr_non_filtered_samples) data->percent[PERCENT_HITS_GLOBAL] = 100.0 * hits / hists->stats.nr_non_filtered_samples; if (sym_hist->period) data->percent[PERCENT_PERIOD_LOCAL] = 100.0 * period / sym_hist->period; if (hists->stats.total_period) data->percent[PERCENT_PERIOD_GLOBAL] = 100.0 * period / hists->stats.total_period; } static void annotation__calc_percent(struct annotation *notes, struct evsel *leader, s64 len) { struct annotation_line *al, *next; struct evsel *evsel; list_for_each_entry(al, ¬es->src->source, node) { s64 end; int i = 0; if (al->offset == -1) continue; next = annotation_line__next(al, ¬es->src->source); end = next ? next->offset : len; for_each_group_evsel(evsel, leader) { struct annotation_data *data; BUG_ON(i >= al->data_nr); data = &al->data[i++]; calc_percent(notes, evsel, data, al->offset, end); } } } void symbol__calc_percent(struct symbol *sym, struct evsel *evsel) { struct annotation *notes = symbol__annotation(sym); annotation__calc_percent(notes, evsel, symbol__size(sym)); } static int evsel__get_arch(struct evsel *evsel, struct arch **parch) { struct perf_env *env = evsel__env(evsel); const char *arch_name = perf_env__arch(env); struct arch *arch; int err; if (!arch_name) return errno; *parch = arch = arch__find(arch_name); if (arch == NULL) { pr_err("%s: unsupported arch %s\n", __func__, arch_name); return ENOTSUP; } if (arch->init) { err = arch->init(arch, env ? env->cpuid : NULL); if (err) { pr_err("%s: failed to initialize %s arch priv area\n", __func__, arch->name); return err; } } return 0; } int symbol__annotate(struct map_symbol *ms, struct evsel *evsel, struct arch **parch) { struct symbol *sym = ms->sym; struct annotation *notes = symbol__annotation(sym); struct annotate_args args = { .evsel = evsel, .options = &annotate_opts, }; struct arch *arch = NULL; int err; err = evsel__get_arch(evsel, &arch); if (err < 0) return err; if (parch) *parch = arch; if (!list_empty(¬es->src->source)) return 0; args.arch = arch; args.ms = *ms; if (annotate_opts.full_addr) notes->start = map__objdump_2mem(ms->map, ms->sym->start); else notes->start = map__rip_2objdump(ms->map, ms->sym->start); return symbol__disassemble(sym, &args); } static void insert_source_line(struct rb_root *root, struct annotation_line *al) { struct annotation_line *iter; struct rb_node **p = &root->rb_node; struct rb_node *parent = NULL; unsigned int percent_type = annotate_opts.percent_type; int i, ret; while (*p != NULL) { parent = *p; iter = rb_entry(parent, struct annotation_line, rb_node); ret = strcmp(iter->path, al->path); if (ret == 0) { for (i = 0; i < al->data_nr; i++) { iter->data[i].percent_sum += annotation_data__percent(&al->data[i], percent_type); } return; } if (ret < 0) p = &(*p)->rb_left; else p = &(*p)->rb_right; } for (i = 0; i < al->data_nr; i++) { al->data[i].percent_sum = annotation_data__percent(&al->data[i], percent_type); } rb_link_node(&al->rb_node, parent, p); rb_insert_color(&al->rb_node, root); } static int cmp_source_line(struct annotation_line *a, struct annotation_line *b) { int i; for (i = 0; i < a->data_nr; i++) { if (a->data[i].percent_sum == b->data[i].percent_sum) continue; return a->data[i].percent_sum > b->data[i].percent_sum; } return 0; } static void __resort_source_line(struct rb_root *root, struct annotation_line *al) { struct annotation_line *iter; struct rb_node **p = &root->rb_node; struct rb_node *parent = NULL; while (*p != NULL) { parent = *p; iter = rb_entry(parent, struct annotation_line, rb_node); if (cmp_source_line(al, iter)) p = &(*p)->rb_left; else p = &(*p)->rb_right; } rb_link_node(&al->rb_node, parent, p); rb_insert_color(&al->rb_node, root); } static void resort_source_line(struct rb_root *dest_root, struct rb_root *src_root) { struct annotation_line *al; struct rb_node *node; node = rb_first(src_root); while (node) { struct rb_node *next; al = rb_entry(node, struct annotation_line, rb_node); next = rb_next(node); rb_erase(node, src_root); __resort_source_line(dest_root, al); node = next; } } static void print_summary(struct rb_root *root, const char *filename) { struct annotation_line *al; struct rb_node *node; printf("\nSorted summary for file %s\n", filename); printf("----------------------------------------------\n\n"); if (RB_EMPTY_ROOT(root)) { printf(" Nothing higher than %1.1f%%\n", MIN_GREEN); return; } node = rb_first(root); while (node) { double percent, percent_max = 0.0; const char *color; char *path; int i; al = rb_entry(node, struct annotation_line, rb_node); for (i = 0; i < al->data_nr; i++) { percent = al->data[i].percent_sum; color = get_percent_color(percent); color_fprintf(stdout, color, " %7.2f", percent); if (percent > percent_max) percent_max = percent; } path = al->path; color = get_percent_color(percent_max); color_fprintf(stdout, color, " %s\n", path); node = rb_next(node); } } static void symbol__annotate_hits(struct symbol *sym, struct evsel *evsel) { int evidx = evsel->core.idx; struct annotation *notes = symbol__annotation(sym); struct sym_hist *h = annotation__histogram(notes, evidx); u64 len = symbol__size(sym), offset; for (offset = 0; offset < len; ++offset) { struct sym_hist_entry *entry; entry = annotated_source__hist_entry(notes->src, evidx, offset); if (entry && entry->nr_samples != 0) printf("%*" PRIx64 ": %" PRIu64 "\n", BITS_PER_LONG / 2, sym->start + offset, entry->nr_samples); } printf("%*s: %" PRIu64 "\n", BITS_PER_LONG / 2, "h->nr_samples", h->nr_samples); } static int annotated_source__addr_fmt_width(struct list_head *lines, u64 start) { char bf[32]; struct annotation_line *line; list_for_each_entry_reverse(line, lines, node) { if (line->offset != -1) return scnprintf(bf, sizeof(bf), "%" PRIx64, start + line->offset); } return 0; } int symbol__annotate_printf(struct map_symbol *ms, struct evsel *evsel) { struct map *map = ms->map; struct symbol *sym = ms->sym; struct dso *dso = map__dso(map); char *filename; const char *d_filename; const char *evsel_name = evsel__name(evsel); struct annotation *notes = symbol__annotation(sym); struct sym_hist *h = annotation__histogram(notes, evsel->core.idx); struct annotation_line *pos, *queue = NULL; struct annotation_options *opts = &annotate_opts; u64 start = map__rip_2objdump(map, sym->start); int printed = 2, queue_len = 0, addr_fmt_width; int more = 0; bool context = opts->context; u64 len; int width = symbol_conf.show_total_period ? 12 : 8; int graph_dotted_len; char buf[512]; filename = strdup(dso->long_name); if (!filename) return -ENOMEM; if (opts->full_path) d_filename = filename; else d_filename = basename(filename); len = symbol__size(sym); if (evsel__is_group_event(evsel)) { width *= evsel->core.nr_members; evsel__group_desc(evsel, buf, sizeof(buf)); evsel_name = buf; } graph_dotted_len = printf(" %-*.*s| Source code & Disassembly of %s for %s (%" PRIu64 " samples, " "percent: %s)\n", width, width, symbol_conf.show_total_period ? "Period" : symbol_conf.show_nr_samples ? "Samples" : "Percent", d_filename, evsel_name, h->nr_samples, percent_type_str(opts->percent_type)); printf("%-*.*s----\n", graph_dotted_len, graph_dotted_len, graph_dotted_line); if (verbose > 0) symbol__annotate_hits(sym, evsel); addr_fmt_width = annotated_source__addr_fmt_width(¬es->src->source, start); list_for_each_entry(pos, ¬es->src->source, node) { int err; if (context && queue == NULL) { queue = pos; queue_len = 0; } err = annotation_line__print(pos, sym, start, evsel, len, opts->min_pcnt, printed, opts->max_lines, queue, addr_fmt_width, opts->percent_type); switch (err) { case 0: ++printed; if (context) { printed += queue_len; queue = NULL; queue_len = 0; } break; case 1: /* filtered by max_lines */ ++more; break; case -1: default: /* * Filtered by min_pcnt or non IP lines when * context != 0 */ if (!context) break; if (queue_len == context) queue = list_entry(queue->node.next, typeof(*queue), node); else ++queue_len; break; } } free(filename); return more; } static void FILE__set_percent_color(void *fp __maybe_unused, double percent __maybe_unused, bool current __maybe_unused) { } static int FILE__set_jumps_percent_color(void *fp __maybe_unused, int nr __maybe_unused, bool current __maybe_unused) { return 0; } static int FILE__set_color(void *fp __maybe_unused, int color __maybe_unused) { return 0; } static void FILE__printf(void *fp, const char *fmt, ...) { va_list args; va_start(args, fmt); vfprintf(fp, fmt, args); va_end(args); } static void FILE__write_graph(void *fp, int graph) { const char *s; switch (graph) { case DARROW_CHAR: s = "↓"; break; case UARROW_CHAR: s = "↑"; break; case LARROW_CHAR: s = "←"; break; case RARROW_CHAR: s = "→"; break; default: s = "?"; break; } fputs(s, fp); } static int symbol__annotate_fprintf2(struct symbol *sym, FILE *fp) { struct annotation *notes = symbol__annotation(sym); struct annotation_write_ops wops = { .first_line = true, .obj = fp, .set_color = FILE__set_color, .set_percent_color = FILE__set_percent_color, .set_jumps_percent_color = FILE__set_jumps_percent_color, .printf = FILE__printf, .write_graph = FILE__write_graph, }; struct annotation_line *al; list_for_each_entry(al, ¬es->src->source, node) { if (annotation_line__filter(al)) continue; annotation_line__write(al, notes, &wops); fputc('\n', fp); wops.first_line = false; } return 0; } int map_symbol__annotation_dump(struct map_symbol *ms, struct evsel *evsel) { const char *ev_name = evsel__name(evsel); char buf[1024]; char *filename; int err = -1; FILE *fp; if (asprintf(&filename, "%s.annotation", ms->sym->name) < 0) return -1; fp = fopen(filename, "w"); if (fp == NULL) goto out_free_filename; if (evsel__is_group_event(evsel)) { evsel__group_desc(evsel, buf, sizeof(buf)); ev_name = buf; } fprintf(fp, "%s() %s\nEvent: %s\n\n", ms->sym->name, map__dso(ms->map)->long_name, ev_name); symbol__annotate_fprintf2(ms->sym, fp); fclose(fp); err = 0; out_free_filename: free(filename); return err; } void symbol__annotate_zero_histogram(struct symbol *sym, int evidx) { struct annotation *notes = symbol__annotation(sym); struct sym_hist *h = annotation__histogram(notes, evidx); memset(h, 0, sizeof(*notes->src->histograms) * notes->src->nr_histograms); } void symbol__annotate_decay_histogram(struct symbol *sym, int evidx) { struct annotation *notes = symbol__annotation(sym); struct sym_hist *h = annotation__histogram(notes, evidx); int len = symbol__size(sym), offset; h->nr_samples = 0; for (offset = 0; offset < len; ++offset) { struct sym_hist_entry *entry; entry = annotated_source__hist_entry(notes->src, evidx, offset); if (entry == NULL) continue; entry->nr_samples = entry->nr_samples * 7 / 8; h->nr_samples += entry->nr_samples; } } void annotated_source__purge(struct annotated_source *as) { struct annotation_line *al, *n; list_for_each_entry_safe(al, n, &as->source, node) { list_del_init(&al->node); disasm_line__free(disasm_line(al)); } } static size_t disasm_line__fprintf(struct disasm_line *dl, FILE *fp) { size_t printed; if (dl->al.offset == -1) return fprintf(fp, "%s\n", dl->al.line); printed = fprintf(fp, "%#" PRIx64 " %s", dl->al.offset, dl->ins.name); if (dl->ops.raw[0] != '\0') { printed += fprintf(fp, "%.*s %s\n", 6 - (int)printed, " ", dl->ops.raw); } return printed + fprintf(fp, "\n"); } size_t disasm__fprintf(struct list_head *head, FILE *fp) { struct disasm_line *pos; size_t printed = 0; list_for_each_entry(pos, head, al.node) printed += disasm_line__fprintf(pos, fp); return printed; } bool disasm_line__is_valid_local_jump(struct disasm_line *dl, struct symbol *sym) { if (!dl || !dl->ins.ops || !ins__is_jump(&dl->ins) || !disasm_line__has_local_offset(dl) || dl->ops.target.offset < 0 || dl->ops.target.offset >= (s64)symbol__size(sym)) return false; return true; } void annotation__mark_jump_targets(struct annotation *notes, struct symbol *sym) { u64 offset, size = symbol__size(sym); /* PLT symbols contain external offsets */ if (strstr(sym->name, "@plt")) return; for (offset = 0; offset < size; ++offset) { struct annotation_line *al = notes->src->offsets[offset]; struct disasm_line *dl; dl = disasm_line(al); if (!disasm_line__is_valid_local_jump(dl, sym)) continue; al = notes->src->offsets[dl->ops.target.offset]; /* * FIXME: Oops, no jump target? Buggy disassembler? Or do we * have to adjust to the previous offset? */ if (al == NULL) continue; if (++al->jump_sources > notes->max_jump_sources) notes->max_jump_sources = al->jump_sources; } } void annotation__set_offsets(struct annotation *notes, s64 size) { struct annotation_line *al; struct annotated_source *src = notes->src; src->max_line_len = 0; src->nr_entries = 0; src->nr_asm_entries = 0; list_for_each_entry(al, &src->source, node) { size_t line_len = strlen(al->line); if (src->max_line_len < line_len) src->max_line_len = line_len; al->idx = src->nr_entries++; if (al->offset != -1) { al->idx_asm = src->nr_asm_entries++; /* * FIXME: short term bandaid to cope with assembly * routines that comes with labels in the same column * as the address in objdump, sigh. * * E.g. copy_user_generic_unrolled */ if (al->offset < size) notes->src->offsets[al->offset] = al; } else al->idx_asm = -1; } } static inline int width_jumps(int n) { if (n >= 100) return 5; if (n / 10) return 2; return 1; } static int annotation__max_ins_name(struct annotation *notes) { int max_name = 0, len; struct annotation_line *al; list_for_each_entry(al, ¬es->src->source, node) { if (al->offset == -1) continue; len = strlen(disasm_line(al)->ins.name); if (max_name < len) max_name = len; } return max_name; } void annotation__init_column_widths(struct annotation *notes, struct symbol *sym) { notes->widths.addr = notes->widths.target = notes->widths.min_addr = hex_width(symbol__size(sym)); notes->widths.max_addr = hex_width(sym->end); notes->widths.jumps = width_jumps(notes->max_jump_sources); notes->widths.max_ins_name = annotation__max_ins_name(notes); } void annotation__update_column_widths(struct annotation *notes) { if (annotate_opts.use_offset) notes->widths.target = notes->widths.min_addr; else if (annotate_opts.full_addr) notes->widths.target = BITS_PER_LONG / 4; else notes->widths.target = notes->widths.max_addr; notes->widths.addr = notes->widths.target; if (annotate_opts.show_nr_jumps) notes->widths.addr += notes->widths.jumps + 1; } void annotation__toggle_full_addr(struct annotation *notes, struct map_symbol *ms) { annotate_opts.full_addr = !annotate_opts.full_addr; if (annotate_opts.full_addr) notes->start = map__objdump_2mem(ms->map, ms->sym->start); else notes->start = map__rip_2objdump(ms->map, ms->sym->start); annotation__update_column_widths(notes); } static void annotation__calc_lines(struct annotation *notes, struct map *map, struct rb_root *root) { struct annotation_line *al; struct rb_root tmp_root = RB_ROOT; list_for_each_entry(al, ¬es->src->source, node) { double percent_max = 0.0; int i; for (i = 0; i < al->data_nr; i++) { double percent; percent = annotation_data__percent(&al->data[i], annotate_opts.percent_type); if (percent > percent_max) percent_max = percent; } if (percent_max <= 0.5) continue; al->path = get_srcline(map__dso(map), notes->start + al->offset, NULL, false, true, notes->start + al->offset); insert_source_line(&tmp_root, al); } resort_source_line(root, &tmp_root); } static void symbol__calc_lines(struct map_symbol *ms, struct rb_root *root) { struct annotation *notes = symbol__annotation(ms->sym); annotation__calc_lines(notes, ms->map, root); } int symbol__tty_annotate2(struct map_symbol *ms, struct evsel *evsel) { struct dso *dso = map__dso(ms->map); struct symbol *sym = ms->sym; struct rb_root source_line = RB_ROOT; struct hists *hists = evsel__hists(evsel); char buf[1024]; int err; err = symbol__annotate2(ms, evsel, NULL); if (err) { char msg[BUFSIZ]; dso->annotate_warned = true; symbol__strerror_disassemble(ms, err, msg, sizeof(msg)); ui__error("Couldn't annotate %s:\n%s", sym->name, msg); return -1; } if (annotate_opts.print_lines) { srcline_full_filename = annotate_opts.full_path; symbol__calc_lines(ms, &source_line); print_summary(&source_line, dso->long_name); } hists__scnprintf_title(hists, buf, sizeof(buf)); fprintf(stdout, "%s, [percent: %s]\n%s() %s\n", buf, percent_type_str(annotate_opts.percent_type), sym->name, dso->long_name); symbol__annotate_fprintf2(sym, stdout); annotated_source__purge(symbol__annotation(sym)->src); return 0; } int symbol__tty_annotate(struct map_symbol *ms, struct evsel *evsel) { struct dso *dso = map__dso(ms->map); struct symbol *sym = ms->sym; struct rb_root source_line = RB_ROOT; int err; err = symbol__annotate(ms, evsel, NULL); if (err) { char msg[BUFSIZ]; dso->annotate_warned = true; symbol__strerror_disassemble(ms, err, msg, sizeof(msg)); ui__error("Couldn't annotate %s:\n%s", sym->name, msg); return -1; } symbol__calc_percent(sym, evsel); if (annotate_opts.print_lines) { srcline_full_filename = annotate_opts.full_path; symbol__calc_lines(ms, &source_line); print_summary(&source_line, dso->long_name); } symbol__annotate_printf(ms, evsel); annotated_source__purge(symbol__annotation(sym)->src); return 0; } bool ui__has_annotation(void) { return use_browser == 1 && perf_hpp_list.sym; } static double annotation_line__max_percent(struct annotation_line *al, struct annotation *notes, unsigned int percent_type) { double percent_max = 0.0; int i; for (i = 0; i < notes->nr_events; i++) { double percent; percent = annotation_data__percent(&al->data[i], percent_type); if (percent > percent_max) percent_max = percent; } return percent_max; } static void disasm_line__write(struct disasm_line *dl, struct annotation *notes, void *obj, char *bf, size_t size, void (*obj__printf)(void *obj, const char *fmt, ...), void (*obj__write_graph)(void *obj, int graph)) { if (dl->ins.ops && dl->ins.ops->scnprintf) { if (ins__is_jump(&dl->ins)) { bool fwd; if (dl->ops.target.outside) goto call_like; fwd = dl->ops.target.offset > dl->al.offset; obj__write_graph(obj, fwd ? DARROW_CHAR : UARROW_CHAR); obj__printf(obj, " "); } else if (ins__is_call(&dl->ins)) { call_like: obj__write_graph(obj, RARROW_CHAR); obj__printf(obj, " "); } else if (ins__is_ret(&dl->ins)) { obj__write_graph(obj, LARROW_CHAR); obj__printf(obj, " "); } else { obj__printf(obj, " "); } } else { obj__printf(obj, " "); } disasm_line__scnprintf(dl, bf, size, !annotate_opts.use_offset, notes->widths.max_ins_name); } static void ipc_coverage_string(char *bf, int size, struct annotation *notes) { double ipc = 0.0, coverage = 0.0; struct annotated_branch *branch = annotation__get_branch(notes); if (branch && branch->hit_cycles) ipc = branch->hit_insn / ((double)branch->hit_cycles); if (branch && branch->total_insn) { coverage = branch->cover_insn * 100.0 / ((double)branch->total_insn); } scnprintf(bf, size, "(Average IPC: %.2f, IPC Coverage: %.1f%%)", ipc, coverage); } static void __annotation_line__write(struct annotation_line *al, struct annotation *notes, bool first_line, bool current_entry, bool change_color, int width, void *obj, unsigned int percent_type, int (*obj__set_color)(void *obj, int color), void (*obj__set_percent_color)(void *obj, double percent, bool current), int (*obj__set_jumps_percent_color)(void *obj, int nr, bool current), void (*obj__printf)(void *obj, const char *fmt, ...), void (*obj__write_graph)(void *obj, int graph)) { double percent_max = annotation_line__max_percent(al, notes, percent_type); int pcnt_width = annotation__pcnt_width(notes), cycles_width = annotation__cycles_width(notes); bool show_title = false; char bf[256]; int printed; if (first_line && (al->offset == -1 || percent_max == 0.0)) { if (notes->branch && al->cycles) { if (al->cycles->ipc == 0.0 && al->cycles->avg == 0) show_title = true; } else show_title = true; } if (al->offset != -1 && percent_max != 0.0) { int i; for (i = 0; i < notes->nr_events; i++) { double percent; percent = annotation_data__percent(&al->data[i], percent_type); obj__set_percent_color(obj, percent, current_entry); if (symbol_conf.show_total_period) { obj__printf(obj, "%11" PRIu64 " ", al->data[i].he.period); } else if (symbol_conf.show_nr_samples) { obj__printf(obj, "%6" PRIu64 " ", al->data[i].he.nr_samples); } else { obj__printf(obj, "%6.2f ", percent); } } } else { obj__set_percent_color(obj, 0, current_entry); if (!show_title) obj__printf(obj, "%-*s", pcnt_width, " "); else { obj__printf(obj, "%-*s", pcnt_width, symbol_conf.show_total_period ? "Period" : symbol_conf.show_nr_samples ? "Samples" : "Percent"); } } if (notes->branch) { if (al->cycles && al->cycles->ipc) obj__printf(obj, "%*.2f ", ANNOTATION__IPC_WIDTH - 1, al->cycles->ipc); else if (!show_title) obj__printf(obj, "%*s", ANNOTATION__IPC_WIDTH, " "); else obj__printf(obj, "%*s ", ANNOTATION__IPC_WIDTH - 1, "IPC"); if (!annotate_opts.show_minmax_cycle) { if (al->cycles && al->cycles->avg) obj__printf(obj, "%*" PRIu64 " ", ANNOTATION__CYCLES_WIDTH - 1, al->cycles->avg); else if (!show_title) obj__printf(obj, "%*s", ANNOTATION__CYCLES_WIDTH, " "); else obj__printf(obj, "%*s ", ANNOTATION__CYCLES_WIDTH - 1, "Cycle"); } else { if (al->cycles) { char str[32]; scnprintf(str, sizeof(str), "%" PRIu64 "(%" PRIu64 "/%" PRIu64 ")", al->cycles->avg, al->cycles->min, al->cycles->max); obj__printf(obj, "%*s ", ANNOTATION__MINMAX_CYCLES_WIDTH - 1, str); } else if (!show_title) obj__printf(obj, "%*s", ANNOTATION__MINMAX_CYCLES_WIDTH, " "); else obj__printf(obj, "%*s ", ANNOTATION__MINMAX_CYCLES_WIDTH - 1, "Cycle(min/max)"); } if (show_title && !*al->line) { ipc_coverage_string(bf, sizeof(bf), notes); obj__printf(obj, "%*s", ANNOTATION__AVG_IPC_WIDTH, bf); } } obj__printf(obj, " "); if (!*al->line) obj__printf(obj, "%-*s", width - pcnt_width - cycles_width, " "); else if (al->offset == -1) { if (al->line_nr && annotate_opts.show_linenr) printed = scnprintf(bf, sizeof(bf), "%-*d ", notes->widths.addr + 1, al->line_nr); else printed = scnprintf(bf, sizeof(bf), "%-*s ", notes->widths.addr, " "); obj__printf(obj, bf); obj__printf(obj, "%-*s", width - printed - pcnt_width - cycles_width + 1, al->line); } else { u64 addr = al->offset; int color = -1; if (!annotate_opts.use_offset) addr += notes->start; if (!annotate_opts.use_offset) { printed = scnprintf(bf, sizeof(bf), "%" PRIx64 ": ", addr); } else { if (al->jump_sources && annotate_opts.offset_level >= ANNOTATION__OFFSET_JUMP_TARGETS) { if (annotate_opts.show_nr_jumps) { int prev; printed = scnprintf(bf, sizeof(bf), "%*d ", notes->widths.jumps, al->jump_sources); prev = obj__set_jumps_percent_color(obj, al->jump_sources, current_entry); obj__printf(obj, bf); obj__set_color(obj, prev); } print_addr: printed = scnprintf(bf, sizeof(bf), "%*" PRIx64 ": ", notes->widths.target, addr); } else if (ins__is_call(&disasm_line(al)->ins) && annotate_opts.offset_level >= ANNOTATION__OFFSET_CALL) { goto print_addr; } else if (annotate_opts.offset_level == ANNOTATION__MAX_OFFSET_LEVEL) { goto print_addr; } else { printed = scnprintf(bf, sizeof(bf), "%-*s ", notes->widths.addr, " "); } } if (change_color) color = obj__set_color(obj, HE_COLORSET_ADDR); obj__printf(obj, bf); if (change_color) obj__set_color(obj, color); disasm_line__write(disasm_line(al), notes, obj, bf, sizeof(bf), obj__printf, obj__write_graph); obj__printf(obj, "%-*s", width - pcnt_width - cycles_width - 3 - printed, bf); } } void annotation_line__write(struct annotation_line *al, struct annotation *notes, struct annotation_write_ops *wops) { __annotation_line__write(al, notes, wops->first_line, wops->current_entry, wops->change_color, wops->width, wops->obj, annotate_opts.percent_type, wops->set_color, wops->set_percent_color, wops->set_jumps_percent_color, wops->printf, wops->write_graph); } int symbol__annotate2(struct map_symbol *ms, struct evsel *evsel, struct arch **parch) { struct symbol *sym = ms->sym; struct annotation *notes = symbol__annotation(sym); size_t size = symbol__size(sym); int nr_pcnt = 1, err; notes->src->offsets = zalloc(size * sizeof(struct annotation_line *)); if (notes->src->offsets == NULL) return ENOMEM; if (evsel__is_group_event(evsel)) nr_pcnt = evsel->core.nr_members; err = symbol__annotate(ms, evsel, parch); if (err) goto out_free_offsets; symbol__calc_percent(sym, evsel); annotation__set_offsets(notes, size); annotation__mark_jump_targets(notes, sym); err = annotation__compute_ipc(notes, size); if (err) goto out_free_offsets; annotation__init_column_widths(notes, sym); notes->nr_events = nr_pcnt; annotation__update_column_widths(notes); sym->annotate2 = 1; return 0; out_free_offsets: zfree(¬es->src->offsets); return err; } static int annotation__config(const char *var, const char *value, void *data) { struct annotation_options *opt = data; if (!strstarts(var, "annotate.")) return 0; if (!strcmp(var, "annotate.offset_level")) { perf_config_u8(&opt->offset_level, "offset_level", value); if (opt->offset_level > ANNOTATION__MAX_OFFSET_LEVEL) opt->offset_level = ANNOTATION__MAX_OFFSET_LEVEL; else if (opt->offset_level < ANNOTATION__MIN_OFFSET_LEVEL) opt->offset_level = ANNOTATION__MIN_OFFSET_LEVEL; } else if (!strcmp(var, "annotate.hide_src_code")) { opt->hide_src_code = perf_config_bool("hide_src_code", value); } else if (!strcmp(var, "annotate.jump_arrows")) { opt->jump_arrows = perf_config_bool("jump_arrows", value); } else if (!strcmp(var, "annotate.show_linenr")) { opt->show_linenr = perf_config_bool("show_linenr", value); } else if (!strcmp(var, "annotate.show_nr_jumps")) { opt->show_nr_jumps = perf_config_bool("show_nr_jumps", value); } else if (!strcmp(var, "annotate.show_nr_samples")) { symbol_conf.show_nr_samples = perf_config_bool("show_nr_samples", value); } else if (!strcmp(var, "annotate.show_total_period")) { symbol_conf.show_total_period = perf_config_bool("show_total_period", value); } else if (!strcmp(var, "annotate.use_offset")) { opt->use_offset = perf_config_bool("use_offset", value); } else if (!strcmp(var, "annotate.disassembler_style")) { opt->disassembler_style = strdup(value); if (!opt->disassembler_style) { pr_err("Not enough memory for annotate.disassembler_style\n"); return -1; } } else if (!strcmp(var, "annotate.objdump")) { opt->objdump_path = strdup(value); if (!opt->objdump_path) { pr_err("Not enough memory for annotate.objdump\n"); return -1; } } else if (!strcmp(var, "annotate.addr2line")) { symbol_conf.addr2line_path = strdup(value); if (!symbol_conf.addr2line_path) { pr_err("Not enough memory for annotate.addr2line\n"); return -1; } } else if (!strcmp(var, "annotate.demangle")) { symbol_conf.demangle = perf_config_bool("demangle", value); } else if (!strcmp(var, "annotate.demangle_kernel")) { symbol_conf.demangle_kernel = perf_config_bool("demangle_kernel", value); } else { pr_debug("%s variable unknown, ignoring...", var); } return 0; } void annotation_options__init(void) { struct annotation_options *opt = &annotate_opts; memset(opt, 0, sizeof(*opt)); /* Default values. */ opt->use_offset = true; opt->jump_arrows = true; opt->annotate_src = true; opt->offset_level = ANNOTATION__OFFSET_JUMP_TARGETS; opt->percent_type = PERCENT_PERIOD_LOCAL; } void annotation_options__exit(void) { zfree(&annotate_opts.disassembler_style); zfree(&annotate_opts.objdump_path); } void annotation_config__init(void) { perf_config(annotation__config, &annotate_opts); } static unsigned int parse_percent_type(char *str1, char *str2) { unsigned int type = (unsigned int) -1; if (!strcmp("period", str1)) { if (!strcmp("local", str2)) type = PERCENT_PERIOD_LOCAL; else if (!strcmp("global", str2)) type = PERCENT_PERIOD_GLOBAL; } if (!strcmp("hits", str1)) { if (!strcmp("local", str2)) type = PERCENT_HITS_LOCAL; else if (!strcmp("global", str2)) type = PERCENT_HITS_GLOBAL; } return type; } int annotate_parse_percent_type(const struct option *opt __maybe_unused, const char *_str, int unset __maybe_unused) { unsigned int type; char *str1, *str2; int err = -1; str1 = strdup(_str); if (!str1) return -ENOMEM; str2 = strchr(str1, '-'); if (!str2) goto out; *str2++ = 0; type = parse_percent_type(str1, str2); if (type == (unsigned int) -1) type = parse_percent_type(str2, str1); if (type != (unsigned int) -1) { annotate_opts.percent_type = type; err = 0; } out: free(str1); return err; } int annotate_check_args(void) { struct annotation_options *args = &annotate_opts; if (args->prefix_strip && !args->prefix) { pr_err("--prefix-strip requires --prefix\n"); return -1; } return 0; } /* * Get register number and access offset from the given instruction. * It assumes AT&T x86 asm format like OFFSET(REG). Maybe it needs * to revisit the format when it handles different architecture. * Fills @reg and @offset when return 0. */ static int extract_reg_offset(struct arch *arch, const char *str, struct annotated_op_loc *op_loc) { char *p; char *regname; if (arch->objdump.register_char == 0) return -1; /* * It should start from offset, but it's possible to skip 0 * in the asm. So 0(%rax) should be same as (%rax). * * However, it also start with a segment select register like * %gs:0x18(%rbx). In that case it should skip the part. */ if (*str == arch->objdump.register_char) { while (*str && !isdigit(*str) && *str != arch->objdump.memory_ref_char) str++; } op_loc->offset = strtol(str, &p, 0); p = strchr(p, arch->objdump.register_char); if (p == NULL) return -1; regname = strdup(p); if (regname == NULL) return -1; op_loc->reg1 = get_dwarf_regnum(regname, 0); free(regname); /* Get the second register */ if (op_loc->multi_regs) { p = strchr(p + 1, arch->objdump.register_char); if (p == NULL) return -1; regname = strdup(p); if (regname == NULL) return -1; op_loc->reg2 = get_dwarf_regnum(regname, 0); free(regname); } return 0; } /** * annotate_get_insn_location - Get location of instruction * @arch: the architecture info * @dl: the target instruction * @loc: a buffer to save the data * * Get detailed location info (register and offset) in the instruction. * It needs both source and target operand and whether it accesses a * memory location. The offset field is meaningful only when the * corresponding mem flag is set. The reg2 field is meaningful only * when multi_regs flag is set. * * Some examples on x86: * * mov (%rax), %rcx # src_reg1 = rax, src_mem = 1, src_offset = 0 * # dst_reg1 = rcx, dst_mem = 0 * * mov 0x18, %r8 # src_reg1 = -1, src_mem = 0 * # dst_reg1 = r8, dst_mem = 0 * * mov %rsi, 8(%rbx,%rcx,4) # src_reg1 = rsi, src_mem = 0, dst_multi_regs = 0 * # dst_reg1 = rbx, dst_reg2 = rcx, dst_mem = 1 * # dst_multi_regs = 1, dst_offset = 8 */ int annotate_get_insn_location(struct arch *arch, struct disasm_line *dl, struct annotated_insn_loc *loc) { struct ins_operands *ops; struct annotated_op_loc *op_loc; int i; if (!strcmp(dl->ins.name, "lock")) ops = dl->ops.locked.ops; else ops = &dl->ops; if (ops == NULL) return -1; memset(loc, 0, sizeof(*loc)); for_each_insn_op_loc(loc, i, op_loc) { const char *insn_str = ops->source.raw; bool multi_regs = ops->source.multi_regs; if (i == INSN_OP_TARGET) { insn_str = ops->target.raw; multi_regs = ops->target.multi_regs; } /* Invalidate the register by default */ op_loc->reg1 = -1; op_loc->reg2 = -1; if (insn_str == NULL) continue; if (strchr(insn_str, arch->objdump.memory_ref_char)) { op_loc->mem_ref = true; op_loc->multi_regs = multi_regs; extract_reg_offset(arch, insn_str, op_loc); } else { char *s = strdup(insn_str); if (s) { op_loc->reg1 = get_dwarf_regnum(s, 0); free(s); } } } return 0; } static void symbol__ensure_annotate(struct map_symbol *ms, struct evsel *evsel) { struct disasm_line *dl, *tmp_dl; struct annotation *notes; notes = symbol__annotation(ms->sym); if (!list_empty(¬es->src->source)) return; if (symbol__annotate(ms, evsel, NULL) < 0) return; /* remove non-insn disasm lines for simplicity */ list_for_each_entry_safe(dl, tmp_dl, ¬es->src->source, al.node) { if (dl->al.offset == -1) { list_del(&dl->al.node); free(dl); } } } static struct disasm_line *find_disasm_line(struct symbol *sym, u64 ip) { struct disasm_line *dl; struct annotation *notes; notes = symbol__annotation(sym); list_for_each_entry(dl, ¬es->src->source, al.node) { if (sym->start + dl->al.offset == ip) { /* * llvm-objdump places "lock" in a separate line and * in that case, we want to get the next line. */ if (!strcmp(dl->ins.name, "lock") && *dl->ops.raw == '\0') { ip++; continue; } return dl; } } return NULL; } static struct annotated_item_stat *annotate_data_stat(struct list_head *head, const char *name) { struct annotated_item_stat *istat; list_for_each_entry(istat, head, list) { if (!strcmp(istat->name, name)) return istat; } istat = zalloc(sizeof(*istat)); if (istat == NULL) return NULL; istat->name = strdup(name); if (istat->name == NULL) { free(istat); return NULL; } list_add_tail(&istat->list, head); return istat; } static bool is_stack_operation(struct arch *arch, struct disasm_line *dl) { if (arch__is(arch, "x86")) { if (!strncmp(dl->ins.name, "push", 4) || !strncmp(dl->ins.name, "pop", 3) || !strncmp(dl->ins.name, "ret", 3)) return true; } return false; } u64 annotate_calc_pcrel(struct map_symbol *ms, u64 ip, int offset, struct disasm_line *dl) { struct annotation *notes; struct disasm_line *next; u64 addr; notes = symbol__annotation(ms->sym); /* * PC-relative addressing starts from the next instruction address * But the IP is for the current instruction. Since disasm_line * doesn't have the instruction size, calculate it using the next * disasm_line. If it's the last one, we can use symbol's end * address directly. */ if (&dl->al.node == notes->src->source.prev) addr = ms->sym->end + offset; else { next = list_next_entry(dl, al.node); addr = ip + (next->al.offset - dl->al.offset) + offset; } return map__rip_2objdump(ms->map, addr); } /** * hist_entry__get_data_type - find data type for given hist entry * @he: hist entry * * This function first annotates the instruction at @he->ip and extracts * register and offset info from it. Then it searches the DWARF debug * info to get a variable and type information using the address, register, * and offset. */ struct annotated_data_type *hist_entry__get_data_type(struct hist_entry *he) { struct map_symbol *ms = &he->ms; struct evsel *evsel = hists_to_evsel(he->hists); struct arch *arch; struct disasm_line *dl; struct annotated_insn_loc loc; struct annotated_op_loc *op_loc; struct annotated_data_type *mem_type; struct annotated_item_stat *istat; u64 ip = he->ip, addr = 0; const char *var_name = NULL; int var_offset; int i; ann_data_stat.total++; if (ms->map == NULL || ms->sym == NULL) { ann_data_stat.no_sym++; return NULL; } if (!symbol_conf.init_annotation) { ann_data_stat.no_sym++; return NULL; } if (evsel__get_arch(evsel, &arch) < 0) { ann_data_stat.no_insn++; return NULL; } /* Make sure it runs objdump to get disasm of the function */ symbol__ensure_annotate(ms, evsel); /* * Get a disasm to extract the location from the insn. * This is too slow... */ dl = find_disasm_line(ms->sym, ip); if (dl == NULL) { ann_data_stat.no_insn++; return NULL; } retry: istat = annotate_data_stat(&ann_insn_stat, dl->ins.name); if (istat == NULL) { ann_data_stat.no_insn++; return NULL; } if (annotate_get_insn_location(arch, dl, &loc) < 0) { ann_data_stat.no_insn_ops++; istat->bad++; return NULL; } if (is_stack_operation(arch, dl)) { istat->good++; he->mem_type_off = 0; return &stackop_type; } for_each_insn_op_loc(&loc, i, op_loc) { if (!op_loc->mem_ref) continue; /* Recalculate IP because of LOCK prefix or insn fusion */ ip = ms->sym->start + dl->al.offset; var_offset = op_loc->offset; /* PC-relative addressing */ if (op_loc->reg1 == DWARF_REG_PC) { struct addr_location al; struct symbol *var; u64 map_addr; addr = annotate_calc_pcrel(ms, ip, op_loc->offset, dl); /* Kernel symbols might be relocated */ map_addr = addr + map__reloc(ms->map); addr_location__init(&al); var = thread__find_symbol_fb(he->thread, he->cpumode, map_addr, &al); if (var) { var_name = var->name; /* Calculate type offset from the start of variable */ var_offset = map_addr - map__unmap_ip(al.map, var->start); } addr_location__exit(&al); } mem_type = find_data_type(ms, ip, op_loc, addr, var_name); if (mem_type) istat->good++; else istat->bad++; if (mem_type && var_name) op_loc->offset = var_offset; if (symbol_conf.annotate_data_sample) { annotated_data_type__update_samples(mem_type, evsel, op_loc->offset, he->stat.nr_events, he->stat.period); } he->mem_type_off = op_loc->offset; return mem_type; } /* * Some instructions can be fused and the actual memory access came * from the previous instruction. */ if (dl->al.offset > 0) { struct disasm_line *prev_dl; prev_dl = list_prev_entry(dl, al.node); if (ins__is_fused(arch, prev_dl->ins.name, dl->ins.name)) { dl = prev_dl; goto retry; } } ann_data_stat.no_mem_ops++; istat->bad++; return NULL; }
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