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Commit 98f69a57 authored by Namhyung Kim's avatar Namhyung Kim Committed by Arnaldo Carvalho de Melo
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perf annotate: Split out util/disasm.c 

The util/annotate.c code has both disassembly and sample annotation
related codes.  Factor out the disasm part so that it can be handled
more easily.

No functional changes intended.

Committer notes:

Add missing include env.h, util.h, bpf-event.h and bpf-util.h to
disasm.c, to fix things like:

  util/disasm.c: In function ‘symbol__disassemble_bpf’:
  util/disasm.c:1203:9: error: implicit declaration of function ‘perf_exe’ [-Werror=implicit-function-declaration]
   1203 |         perf_exe(tpath, sizeof(tpath));
        |         ^~~~~~~~
Signed-off-by: default avatarNamhyung Kim <namhyung@kernel.org>
Tested-by: default avatarIan Rogers <irogers@google.com>
Cc: Adrian Hunter <adrian.hunter@intel.com>
Cc: Ingo Molnar <mingo@kernel.org>
Cc: Jiri Olsa <jolsa@kernel.org>
Cc: Kan Liang <kan.liang@linux.intel.com>
Cc: Peter Zijlstra <peterz@infradead.org>
Link: https://lore.kernel.org/r/20240329215812.537846-4-namhyung@kernel.orgSigned-off-by: default avatarArnaldo Carvalho de Melo <acme@redhat.com>
parent 10adbf77
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Showing with 1762 additions and 1710 deletions
tools/perf/util/Build
View file @ 98f69a57
...@@ -12,6 +12,7 @@ perf-y += config.o ...@@ -12,6 +12,7 @@ perf-y += config.o
perf-y += copyfile.o perf-y += copyfile.o
perf-y += ctype.o perf-y += ctype.o
perf-y += db-export.o perf-y += db-export.o
perf-y += disasm.o
perf-y += env.o perf-y += env.o
perf-y += event.o perf-y += event.o
perf-y += evlist.o perf-y += evlist.o
......
tools/perf/util/annotate.c
View file @ 98f69a57
...@@ -16,6 +16,7 @@ ...@@ -16,6 +16,7 @@
#include "build-id.h" #include "build-id.h"
#include "color.h" #include "color.h"
#include "config.h" #include "config.h"
#include "disasm.h"
#include "dso.h" #include "dso.h"
#include "env.h" #include "env.h"
#include "map.h" #include "map.h"
...@@ -64,48 +65,6 @@ ...@@ -64,48 +65,6 @@
/* global annotation options */ /* global annotation options */
struct annotation_options annotate_opts; 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;
char imm_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 */ /* Data type collection debug statistics */
struct annotated_data_stat ann_data_stat; struct annotated_data_stat ann_data_stat;
LIST_HEAD(ann_insn_stat); LIST_HEAD(ann_insn_stat);
...@@ -125,759 +84,6 @@ struct annotated_data_type canary_type = { ...@@ -125,759 +84,6 @@ struct annotated_data_type canary_type = {
}, },
}; };
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 = '(',
.imm_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_nop(const struct ins *ins)
{
return ins->ops == &nop_ops;
}
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 */ /* symbol histogram: key = offset << 16 | evsel->core.idx */
static size_t sym_hist_hash(long key, void *ctx __maybe_unused) static size_t sym_hist_hash(long key, void *ctx __maybe_unused)
{ {
...@@ -1214,212 +420,76 @@ static void annotation__count_and_fill(struct annotation *notes, u64 start, u64 ...@@ -1214,212 +420,76 @@ static void annotation__count_and_fill(struct annotation *notes, u64 start, u64
branch->cover_insn += cover_insn; branch->cover_insn += cover_insn;
} }
} }
} }
static int annotation__compute_ipc(struct annotation *notes, size_t size) 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 = &notes->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 = &notes->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 err = 0;
int nr = 1; s64 offset;
if (evsel__is_group_event(args->evsel)) if (!notes->branch || !notes->branch->cycles_hist)
nr = args->evsel->core.nr_members; return 0;
dl = zalloc(disasm_line_size(nr)); notes->branch->total_insn = annotation__count_insn(notes, 0, size - 1);
if (!dl) notes->branch->hit_cycles = 0;
return NULL; notes->branch->hit_insn = 0;
notes->branch->cover_insn = 0;
annotation_line__init(&dl->al, args, nr); annotation__lock(notes);
if (dl->al.line == NULL) for (offset = size - 1; offset >= 0; --offset) {
goto out_delete; struct cyc_hist *ch;
if (args->offset != -1) { ch = &notes->branch->cycles_hist[offset];
if (disasm_line__parse(dl->al.line, &dl->ins.name, &dl->ops.raw) < 0) if (ch && ch->cycles) {
goto out_free_line; struct annotation_line *al;
disasm_line__init_ins(dl, args->arch, &args->ms); 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;
}
}
} }
return dl; if (err) {
while (++offset < (s64)size) {
struct cyc_hist *ch = &notes->branch->cycles_hist[offset];
out_free_line: if (ch && ch->cycles) {
zfree(&dl->al.line); struct annotation_line *al = notes->src->offsets[offset];
out_delete: if (al)
free(dl); zfree(&al->cycles);
return NULL; }
}
}
annotation__unlock(notes);
return 0;
} }
void disasm_line__free(struct disasm_line *dl) int addr_map_symbol__inc_samples(struct addr_map_symbol *ams, struct perf_sample *sample,
struct evsel *evsel)
{ {
if (dl->ins.ops && dl->ins.ops->free) return symbol__inc_addr_samples(&ams->ms, evsel, ams->al_addr, sample);
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) int hist_entry__inc_addr_samples(struct hist_entry *he, struct perf_sample *sample,
struct evsel *evsel, u64 ip)
{ {
if (raw || !dl->ins.ops) return symbol__inc_addr_samples(&he->ms, evsel, ip, sample);
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) void annotation__exit(struct annotation *notes)
{ {
annotated_source__delete(notes->src); annotated_source__delete(notes->src);
...@@ -1478,8 +548,7 @@ bool annotation__trylock(struct annotation *notes) ...@@ -1478,8 +548,7 @@ bool annotation__trylock(struct annotation *notes)
return mutex_trylock(mutex); return mutex_trylock(mutex);
} }
void annotation_line__add(struct annotation_line *al, struct list_head *head)
static void annotation_line__add(struct annotation_line *al, struct list_head *head)
{ {
list_add_tail(&al->node, head); list_add_tail(&al->node, head);
} }
...@@ -1689,673 +758,6 @@ annotation_line__print(struct annotation_line *al, struct symbol *sym, u64 start ...@@ -1689,673 +758,6 @@ annotation_line__print(struct annotation_line *al, struct symbol *sym, u64 start
return 0; 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, &notes->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 = &notes->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 (!ins__is_nop(&dl->ins))
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,
&notes->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, &notes->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, &notes->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, static void calc_percent(struct annotation *notes,
struct evsel *evsel, struct evsel *evsel,
struct annotation_data *data, struct annotation_data *data,
......
tools/perf/util/annotate.h
View file @ 98f69a57
...@@ -13,10 +13,10 @@ ...@@ -13,10 +13,10 @@
#include "mutex.h" #include "mutex.h"
#include "spark.h" #include "spark.h"
#include "hashmap.h" #include "hashmap.h"
#include "disasm.h"
struct hist_browser_timer; struct hist_browser_timer;
struct hist_entry; struct hist_entry;
struct ins_ops;
struct map; struct map;
struct map_symbol; struct map_symbol;
struct addr_map_symbol; struct addr_map_symbol;
...@@ -26,60 +26,6 @@ struct evsel; ...@@ -26,60 +26,6 @@ struct evsel;
struct symbol; struct symbol;
struct annotated_data_type; struct annotated_data_type;
struct ins {
const char *name;
struct ins_ops *ops;
};
struct ins_operands {
char *raw;
struct {
char *raw;
char *name;
struct symbol *sym;
u64 addr;
s64 offset;
bool offset_avail;
bool outside;
bool multi_regs;
} target;
union {
struct {
char *raw;
char *name;
u64 addr;
bool multi_regs;
} source;
struct {
struct ins ins;
struct ins_operands *ops;
} locked;
struct {
char *raw_comment;
char *raw_func_start;
} jump;
};
};
struct arch;
bool arch__is(struct arch *arch, const char *name);
struct ins_ops {
void (*free)(struct ins_operands *ops);
int (*parse)(struct arch *arch, struct ins_operands *ops, struct map_symbol *ms);
int (*scnprintf)(struct ins *ins, char *bf, size_t size,
struct ins_operands *ops, int max_ins_name);
};
bool ins__is_jump(const struct ins *ins);
bool ins__is_call(const struct ins *ins);
bool ins__is_nop(const struct ins *ins);
bool ins__is_ret(const struct ins *ins);
bool ins__is_lock(const struct ins *ins);
int ins__scnprintf(struct ins *ins, char *bf, size_t size, struct ins_operands *ops, int max_ins_name);
bool ins__is_fused(struct arch *arch, const char *ins1, const char *ins2);
#define ANNOTATION__IPC_WIDTH 6 #define ANNOTATION__IPC_WIDTH 6
#define ANNOTATION__CYCLES_WIDTH 6 #define ANNOTATION__CYCLES_WIDTH 6
#define ANNOTATION__MINMAX_CYCLES_WIDTH 19 #define ANNOTATION__MINMAX_CYCLES_WIDTH 19
...@@ -172,6 +118,8 @@ struct disasm_line { ...@@ -172,6 +118,8 @@ struct disasm_line {
struct annotation_line al; struct annotation_line al;
}; };
void annotation_line__add(struct annotation_line *al, struct list_head *head);
static inline double annotation_data__percent(struct annotation_data *data, static inline double annotation_data__percent(struct annotation_data *data,
unsigned int which) unsigned int which)
{ {
...@@ -213,7 +161,6 @@ static inline bool disasm_line__has_local_offset(const struct disasm_line *dl) ...@@ -213,7 +161,6 @@ static inline bool disasm_line__has_local_offset(const struct disasm_line *dl)
*/ */
bool disasm_line__is_valid_local_jump(struct disasm_line *dl, struct symbol *sym); bool disasm_line__is_valid_local_jump(struct disasm_line *dl, struct symbol *sym);
void disasm_line__free(struct disasm_line *dl);
struct annotation_line * struct annotation_line *
annotation_line__next(struct annotation_line *pos, struct list_head *head); annotation_line__next(struct annotation_line *pos, struct list_head *head);
...@@ -236,7 +183,6 @@ int __annotation__scnprintf_samples_period(struct annotation *notes, ...@@ -236,7 +183,6 @@ int __annotation__scnprintf_samples_period(struct annotation *notes,
struct evsel *evsel, struct evsel *evsel,
bool show_freq); bool show_freq);
int disasm_line__scnprintf(struct disasm_line *dl, char *bf, size_t size, bool raw, int max_ins_name);
size_t disasm__fprintf(struct list_head *head, FILE *fp); size_t disasm__fprintf(struct list_head *head, FILE *fp);
void symbol__calc_percent(struct symbol *sym, struct evsel *evsel); void symbol__calc_percent(struct symbol *sym, struct evsel *evsel);
......
tools/perf/util/disasm.c 0 → 100644
View file @ 98f69a57
// SPDX-License-Identifier: GPL-2.0-only
#include <ctype.h>
#include <errno.h>
#include <inttypes.h>
#include <libgen.h>
#include <regex.h>
#include <stdlib.h>
#include <unistd.h>
#include <linux/string.h>
#include <subcmd/run-command.h>
#include "annotate.h"
#include "build-id.h"
#include "debug.h"
#include "disasm.h"
#include "dso.h"
#include "env.h"
#include "evsel.h"
#include "map.h"
#include "maps.h"
#include "srcline.h"
#include "symbol.h"
#include "util.h"
static regex_t file_lineno;
/* These can be referred from the arch-dependent code */
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;
static int jump__scnprintf(struct ins *ins, char *bf, size_t size,
struct ins_operands *ops, int max_ins_name);
static int call__scnprintf(struct ins *ins, char *bf, size_t size,
struct ins_operands *ops, int max_ins_name);
static void ins__sort(struct arch *arch);
static int disasm_line__parse(char *line, const char **namep, char **rawp);
static __attribute__((constructor)) void symbol__init_regexpr(void)
{
regcomp(&file_lineno, "^/[^:]+:([0-9]+)", REG_EXTENDED);
}
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 = '(',
.imm_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 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);
}
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);
}
static void ins_ops__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_ops__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_nop(const struct ins *ins)
{
return ins->ops == &nop_ops;
}
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;
}
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 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;
}
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.
*/
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_ops__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);
}
/*
* 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, &notes->src->source);
return 0;
}
static void delete_last_nop(struct symbol *sym)
{
struct annotation *notes = symbol__annotation(sym);
struct list_head *list = &notes->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 (!ins__is_nop(&dl->ins))
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>
#include "bpf-event.h"
#include "bpf-utils.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,
&notes->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, &notes->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, &notes->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;
}
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;
}
tools/perf/util/disasm.h 0 → 100644
View file @ 98f69a57
// SPDX-License-Identifier: GPL-2.0
#ifndef __PERF_UTIL_DISASM_H
#define __PERF_UTIL_DISASM_H
#include "map_symbol.h"
struct annotation_options;
struct disasm_line;
struct ins;
struct evsel;
struct symbol;
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;
char imm_char;
} objdump;
};
struct ins {
const char *name;
struct ins_ops *ops;
};
struct ins_operands {
char *raw;
struct {
char *raw;
char *name;
struct symbol *sym;
u64 addr;
s64 offset;
bool offset_avail;
bool outside;
bool multi_regs;
} target;
union {
struct {
char *raw;
char *name;
u64 addr;
bool multi_regs;
} source;
struct {
struct ins ins;
struct ins_operands *ops;
} locked;
struct {
char *raw_comment;
char *raw_func_start;
} jump;
};
};
struct ins_ops {
void (*free)(struct ins_operands *ops);
int (*parse)(struct arch *arch, struct ins_operands *ops, struct map_symbol *ms);
int (*scnprintf)(struct ins *ins, char *bf, size_t size,
struct ins_operands *ops, int max_ins_name);
};
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;
};
struct arch *arch__find(const char *name);
bool arch__is(struct arch *arch, const char *name);
struct ins_ops *ins__find(struct arch *arch, const char *name);
int ins__scnprintf(struct ins *ins, char *bf, size_t size,
struct ins_operands *ops, int max_ins_name);
bool ins__is_call(const struct ins *ins);
bool ins__is_jump(const struct ins *ins);
bool ins__is_fused(struct arch *arch, const char *ins1, const char *ins2);
bool ins__is_nop(const struct ins *ins);
bool ins__is_ret(const struct ins *ins);
bool ins__is_lock(const struct ins *ins);
struct disasm_line *disasm_line__new(struct annotate_args *args);
void disasm_line__free(struct disasm_line *dl);
int disasm_line__scnprintf(struct disasm_line *dl, char *bf, size_t size,
bool raw, int max_ins_name);
int symbol__disassemble(struct symbol *sym, struct annotate_args *args);
#endif /* __PERF_UTIL_DISASM_H */
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