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synced 2024-08-21 16:29:59 +00:00
![Ian Rogers](/assets/img/avatar_default.png)
We write an address then a ',' to addr2line. With inline data we
generally get back (// are my comments):
0x1234 // address
foo // function name
foo.c:123 // filename:line
bar // function name
bar.c:123 // filename:line
0x000000000000000 // sentinel address created by ','
?? // unknown function name
??:0 // unknown filename:line
The code was assuming the inline data also had the address, which is
incorrect. This means the first inline function name (bar above) needs
to be checked to see if it is the sentinel, otherwise to be treated as
a function name. The regression was caused by the addition of
addresses as the kernel is reporting a symbol at address 0 (used by
GNU binutils when it interprets ',').
Committer testing:
Using:
# perf trace --call-graph=dwarf -e lock:contention_*
<SNIP>
1244.615 TaskCon~ller #/2645281 lock:contention_begin(lock_addr: 0xffff8e6748da5ab0, flags: 2)
__preempt_count_dec_and_test (inlined)
trace_contention_begin (inlined)
trace_contention_begin (inlined)
rwsem_down_read_slowpath ([kernel.kallsyms])
__preempt_count_dec_and_test (inlined)
trace_contention_begin (inlined)
trace_contention_begin (inlined)
rwsem_down_read_slowpath ([kernel.kallsyms])
__down_read_common (inlined)
__down_read (inlined)
down_read ([kernel.kallsyms])
arch_static_branch (inlined)
static_key_false (inlined)
__mmap_lock_trace_acquire_returned (inlined)
mmap_read_lock (inlined)
do_user_addr_fault ([kernel.kallsyms])
arch_local_irq_disable (inlined)
handle_page_fault (inlined)
exc_page_fault ([kernel.kallsyms])
asm_exc_page_fault ([kernel.kallsyms])
[0x4def008] (/usr/lib64/firefox/libxul.so)
1244.619 TaskCon~ller #/2645281 lock:contention_end(lock_addr: 0xffff8e6748da5ab0)
__preempt_count_dec_and_test (inlined)
trace_contention_end (inlined)
trace_contention_end (inlined)
rwsem_down_read_slowpath ([kernel.kallsyms])
__preempt_count_dec_and_test (inlined)
trace_contention_end (inlined)
trace_contention_end (inlined)
rwsem_down_read_slowpath ([kernel.kallsyms])
__down_read_common (inlined)
__down_read (inlined)
down_read ([kernel.kallsyms])
arch_static_branch (inlined)
static_key_false (inlined)
__mmap_lock_trace_acquire_returned (inlined)
mmap_read_lock (inlined)
do_user_addr_fault ([kernel.kallsyms])
arch_local_irq_disable (inlined)
handle_page_fault (inlined)
exc_page_fault ([kernel.kallsyms])
asm_exc_page_fault ([kernel.kallsyms])
<SNIP>
Fixes: 8dc26b6f71
("perf srcline: Make sentinel reading for binutils addr2line more robust")
Reported-by: Arnaldo Carvalho de Melo <acme@kernel.org>
Signed-off-by: Ian Rogers <irogers@google.com>
Tested-by: Arnaldo Carvalho de Melo <acme@redhat.com>
Cc: Adrian Hunter <adrian.hunter@intel.com>
Cc: Alexander Shishkin <alexander.shishkin@linux.intel.com>
Cc: Ian Rogers <irogers@google.com>
Cc: Ingo Molnar <mingo@redhat.com>
Cc: Jiri Olsa <jolsa@kernel.org>
Cc: llvm@lists.linux.dev
Cc: Mark Rutland <mark.rutland@arm.com>
Cc: Namhyung Kim <namhyung@kernel.org>
Cc: Nathan Chancellor <nathan@kernel.org>
Cc: Nick Desaulniers <ndesaulniers@google.com>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Tom Rix <trix@redhat.com>
Link: https://lore.kernel.org/r/20230615025041.1982072-1-irogers@google.com
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
1059 lines
23 KiB
C
1059 lines
23 KiB
C
// SPDX-License-Identifier: GPL-2.0
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#include <inttypes.h>
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#include <signal.h>
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#include <stdio.h>
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#include <stdlib.h>
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#include <string.h>
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#include <sys/types.h>
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#include <linux/kernel.h>
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#include <linux/string.h>
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#include <linux/zalloc.h>
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#include <api/io.h>
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#include "util/dso.h"
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#include "util/debug.h"
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#include "util/callchain.h"
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#include "util/symbol_conf.h"
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#include "srcline.h"
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#include "string2.h"
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#include "symbol.h"
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#include "subcmd/run-command.h"
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/* If addr2line doesn't return data for 1 second then timeout. */
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int addr2line_timeout_ms = 1 * 1000;
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bool srcline_full_filename;
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char *srcline__unknown = (char *)"??:0";
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static const char *dso__name(struct dso *dso)
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{
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const char *dso_name;
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if (dso->symsrc_filename)
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dso_name = dso->symsrc_filename;
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else
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dso_name = dso->long_name;
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if (dso_name[0] == '[')
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return NULL;
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if (!strncmp(dso_name, "/tmp/perf-", 10))
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return NULL;
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return dso_name;
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}
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static int inline_list__append(struct symbol *symbol, char *srcline,
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struct inline_node *node)
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{
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struct inline_list *ilist;
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ilist = zalloc(sizeof(*ilist));
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if (ilist == NULL)
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return -1;
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ilist->symbol = symbol;
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ilist->srcline = srcline;
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if (callchain_param.order == ORDER_CALLEE)
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list_add_tail(&ilist->list, &node->val);
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else
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list_add(&ilist->list, &node->val);
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return 0;
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}
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/* basename version that takes a const input string */
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static const char *gnu_basename(const char *path)
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{
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const char *base = strrchr(path, '/');
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return base ? base + 1 : path;
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}
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static char *srcline_from_fileline(const char *file, unsigned int line)
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{
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char *srcline;
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if (!file)
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return NULL;
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if (!srcline_full_filename)
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file = gnu_basename(file);
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if (asprintf(&srcline, "%s:%u", file, line) < 0)
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return NULL;
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return srcline;
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}
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static struct symbol *new_inline_sym(struct dso *dso,
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struct symbol *base_sym,
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const char *funcname)
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{
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struct symbol *inline_sym;
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char *demangled = NULL;
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if (!funcname)
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funcname = "??";
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if (dso) {
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demangled = dso__demangle_sym(dso, 0, funcname);
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if (demangled)
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funcname = demangled;
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}
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if (base_sym && strcmp(funcname, base_sym->name) == 0) {
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/* reuse the real, existing symbol */
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inline_sym = base_sym;
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/* ensure that we don't alias an inlined symbol, which could
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* lead to double frees in inline_node__delete
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*/
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assert(!base_sym->inlined);
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} else {
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/* create a fake symbol for the inline frame */
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inline_sym = symbol__new(base_sym ? base_sym->start : 0,
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base_sym ? (base_sym->end - base_sym->start) : 0,
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base_sym ? base_sym->binding : 0,
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base_sym ? base_sym->type : 0,
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funcname);
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if (inline_sym)
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inline_sym->inlined = 1;
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}
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free(demangled);
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return inline_sym;
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}
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#define MAX_INLINE_NEST 1024
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#ifdef HAVE_LIBBFD_SUPPORT
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/*
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* Implement addr2line using libbfd.
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*/
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#define PACKAGE "perf"
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#include <bfd.h>
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struct a2l_data {
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const char *input;
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u64 addr;
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bool found;
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const char *filename;
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const char *funcname;
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unsigned line;
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bfd *abfd;
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asymbol **syms;
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};
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static int bfd_error(const char *string)
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{
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const char *errmsg;
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errmsg = bfd_errmsg(bfd_get_error());
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fflush(stdout);
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if (string)
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pr_debug("%s: %s\n", string, errmsg);
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else
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pr_debug("%s\n", errmsg);
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return -1;
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}
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static int slurp_symtab(bfd *abfd, struct a2l_data *a2l)
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{
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long storage;
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long symcount;
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asymbol **syms;
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bfd_boolean dynamic = FALSE;
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if ((bfd_get_file_flags(abfd) & HAS_SYMS) == 0)
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return bfd_error(bfd_get_filename(abfd));
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storage = bfd_get_symtab_upper_bound(abfd);
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if (storage == 0L) {
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storage = bfd_get_dynamic_symtab_upper_bound(abfd);
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dynamic = TRUE;
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}
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if (storage < 0L)
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return bfd_error(bfd_get_filename(abfd));
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syms = malloc(storage);
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if (dynamic)
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symcount = bfd_canonicalize_dynamic_symtab(abfd, syms);
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else
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symcount = bfd_canonicalize_symtab(abfd, syms);
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if (symcount < 0) {
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free(syms);
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return bfd_error(bfd_get_filename(abfd));
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}
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a2l->syms = syms;
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return 0;
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}
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static void find_address_in_section(bfd *abfd, asection *section, void *data)
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{
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bfd_vma pc, vma;
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bfd_size_type size;
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struct a2l_data *a2l = data;
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flagword flags;
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if (a2l->found)
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return;
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#ifdef bfd_get_section_flags
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flags = bfd_get_section_flags(abfd, section);
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#else
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flags = bfd_section_flags(section);
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#endif
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if ((flags & SEC_ALLOC) == 0)
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return;
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pc = a2l->addr;
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#ifdef bfd_get_section_vma
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vma = bfd_get_section_vma(abfd, section);
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#else
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vma = bfd_section_vma(section);
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#endif
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#ifdef bfd_get_section_size
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size = bfd_get_section_size(section);
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#else
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size = bfd_section_size(section);
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#endif
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if (pc < vma || pc >= vma + size)
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return;
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a2l->found = bfd_find_nearest_line(abfd, section, a2l->syms, pc - vma,
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&a2l->filename, &a2l->funcname,
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&a2l->line);
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if (a2l->filename && !strlen(a2l->filename))
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a2l->filename = NULL;
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}
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static struct a2l_data *addr2line_init(const char *path)
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{
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bfd *abfd;
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struct a2l_data *a2l = NULL;
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abfd = bfd_openr(path, NULL);
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if (abfd == NULL)
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return NULL;
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if (!bfd_check_format(abfd, bfd_object))
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goto out;
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a2l = zalloc(sizeof(*a2l));
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if (a2l == NULL)
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goto out;
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a2l->abfd = abfd;
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a2l->input = strdup(path);
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if (a2l->input == NULL)
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goto out;
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if (slurp_symtab(abfd, a2l))
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goto out;
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return a2l;
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out:
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if (a2l) {
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zfree((char **)&a2l->input);
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free(a2l);
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}
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bfd_close(abfd);
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return NULL;
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}
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static void addr2line_cleanup(struct a2l_data *a2l)
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{
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if (a2l->abfd)
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bfd_close(a2l->abfd);
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zfree((char **)&a2l->input);
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zfree(&a2l->syms);
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free(a2l);
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}
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static int inline_list__append_dso_a2l(struct dso *dso,
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struct inline_node *node,
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struct symbol *sym)
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{
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struct a2l_data *a2l = dso->a2l;
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struct symbol *inline_sym = new_inline_sym(dso, sym, a2l->funcname);
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char *srcline = NULL;
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if (a2l->filename)
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srcline = srcline_from_fileline(a2l->filename, a2l->line);
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return inline_list__append(inline_sym, srcline, node);
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}
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static int addr2line(const char *dso_name, u64 addr,
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char **file, unsigned int *line, struct dso *dso,
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bool unwind_inlines, struct inline_node *node,
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struct symbol *sym)
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{
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int ret = 0;
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struct a2l_data *a2l = dso->a2l;
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if (!a2l) {
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dso->a2l = addr2line_init(dso_name);
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a2l = dso->a2l;
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}
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if (a2l == NULL) {
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if (!symbol_conf.disable_add2line_warn)
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pr_warning("addr2line_init failed for %s\n", dso_name);
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return 0;
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}
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a2l->addr = addr;
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a2l->found = false;
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bfd_map_over_sections(a2l->abfd, find_address_in_section, a2l);
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if (!a2l->found)
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return 0;
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if (unwind_inlines) {
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int cnt = 0;
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if (node && inline_list__append_dso_a2l(dso, node, sym))
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return 0;
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while (bfd_find_inliner_info(a2l->abfd, &a2l->filename,
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&a2l->funcname, &a2l->line) &&
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cnt++ < MAX_INLINE_NEST) {
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if (a2l->filename && !strlen(a2l->filename))
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a2l->filename = NULL;
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if (node != NULL) {
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if (inline_list__append_dso_a2l(dso, node, sym))
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return 0;
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// found at least one inline frame
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ret = 1;
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}
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}
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}
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if (file) {
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*file = a2l->filename ? strdup(a2l->filename) : NULL;
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ret = *file ? 1 : 0;
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}
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if (line)
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*line = a2l->line;
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return ret;
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}
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void dso__free_a2l(struct dso *dso)
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{
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struct a2l_data *a2l = dso->a2l;
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if (!a2l)
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return;
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addr2line_cleanup(a2l);
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dso->a2l = NULL;
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}
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#else /* HAVE_LIBBFD_SUPPORT */
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static int filename_split(char *filename, unsigned int *line_nr)
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{
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char *sep;
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sep = strchr(filename, '\n');
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if (sep)
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*sep = '\0';
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if (!strcmp(filename, "??:0"))
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return 0;
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sep = strchr(filename, ':');
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if (sep) {
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*sep++ = '\0';
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*line_nr = strtoul(sep, NULL, 0);
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return 1;
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}
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pr_debug("addr2line missing ':' in filename split\n");
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return 0;
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}
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static void addr2line_subprocess_cleanup(struct child_process *a2l)
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{
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if (a2l->pid != -1) {
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kill(a2l->pid, SIGKILL);
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finish_command(a2l); /* ignore result, we don't care */
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a2l->pid = -1;
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}
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free(a2l);
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}
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static struct child_process *addr2line_subprocess_init(const char *addr2line_path,
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const char *binary_path)
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{
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const char *argv[] = {
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addr2line_path ?: "addr2line",
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"-e", binary_path,
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"-a", "-i", "-f", NULL
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};
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struct child_process *a2l = zalloc(sizeof(*a2l));
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int start_command_status = 0;
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if (a2l == NULL) {
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pr_err("Failed to allocate memory for addr2line");
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return NULL;
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}
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a2l->pid = -1;
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a2l->in = -1;
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a2l->out = -1;
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a2l->no_stderr = 1;
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a2l->argv = argv;
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start_command_status = start_command(a2l);
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a2l->argv = NULL; /* it's not used after start_command; avoid dangling pointers */
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if (start_command_status != 0) {
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pr_warning("could not start addr2line (%s) for %s: start_command return code %d\n",
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addr2line_path, binary_path, start_command_status);
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addr2line_subprocess_cleanup(a2l);
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return NULL;
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}
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return a2l;
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}
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enum a2l_style {
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BROKEN,
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GNU_BINUTILS,
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LLVM,
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};
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static enum a2l_style addr2line_configure(struct child_process *a2l, const char *dso_name)
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{
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static bool cached;
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static enum a2l_style style;
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|
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if (!cached) {
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char buf[128];
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struct io io;
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int ch;
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int lines;
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|
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if (write(a2l->in, ",\n", 2) != 2)
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return BROKEN;
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io__init(&io, a2l->out, buf, sizeof(buf));
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ch = io__get_char(&io);
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if (ch == ',') {
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style = LLVM;
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cached = true;
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lines = 1;
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pr_debug("Detected LLVM addr2line style\n");
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} else if (ch == '0') {
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style = GNU_BINUTILS;
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cached = true;
|
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lines = 3;
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pr_debug("Detected binutils addr2line style\n");
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} else {
|
|
if (!symbol_conf.disable_add2line_warn) {
|
|
char *output = NULL;
|
|
size_t output_len;
|
|
|
|
io__getline(&io, &output, &output_len);
|
|
pr_warning("%s %s: addr2line configuration failed\n",
|
|
__func__, dso_name);
|
|
pr_warning("\t%c%s", ch, output);
|
|
}
|
|
pr_debug("Unknown/broken addr2line style\n");
|
|
return BROKEN;
|
|
}
|
|
while (lines) {
|
|
ch = io__get_char(&io);
|
|
if (ch <= 0)
|
|
break;
|
|
if (ch == '\n')
|
|
lines--;
|
|
}
|
|
/* Ignore SIGPIPE in the event addr2line exits. */
|
|
signal(SIGPIPE, SIG_IGN);
|
|
}
|
|
return style;
|
|
}
|
|
|
|
static int read_addr2line_record(struct io *io,
|
|
enum a2l_style style,
|
|
const char *dso_name,
|
|
u64 addr,
|
|
bool first,
|
|
char **function,
|
|
char **filename,
|
|
unsigned int *line_nr)
|
|
{
|
|
/*
|
|
* Returns:
|
|
* -1 ==> error
|
|
* 0 ==> sentinel (or other ill-formed) record read
|
|
* 1 ==> a genuine record read
|
|
*/
|
|
char *line = NULL;
|
|
size_t line_len = 0;
|
|
unsigned int dummy_line_nr = 0;
|
|
int ret = -1;
|
|
|
|
if (function != NULL)
|
|
zfree(function);
|
|
|
|
if (filename != NULL)
|
|
zfree(filename);
|
|
|
|
if (line_nr != NULL)
|
|
*line_nr = 0;
|
|
|
|
/*
|
|
* Read the first line. Without an error this will be:
|
|
* - for the first line an address like 0x1234,
|
|
* - the binutils sentinel 0x0000000000000000,
|
|
* - the llvm-addr2line the sentinel ',' character,
|
|
* - the function name line for an inlined function.
|
|
*/
|
|
if (io__getline(io, &line, &line_len) < 0 || !line_len)
|
|
goto error;
|
|
|
|
pr_debug("%s %s: addr2line read address for sentinel: %s", __func__, dso_name, line);
|
|
if (style == LLVM && line_len == 2 && line[0] == ',') {
|
|
/* Found the llvm-addr2line sentinel character. */
|
|
zfree(&line);
|
|
return 0;
|
|
} else if (style == GNU_BINUTILS && (!first || addr != 0)) {
|
|
int zero_count = 0, non_zero_count = 0;
|
|
/*
|
|
* Check for binutils sentinel ignoring it for the case the
|
|
* requested address is 0.
|
|
*/
|
|
|
|
/* A given address should always start 0x. */
|
|
if (line_len >= 2 || line[0] != '0' || line[1] != 'x') {
|
|
for (size_t i = 2; i < line_len; i++) {
|
|
if (line[i] == '0')
|
|
zero_count++;
|
|
else if (line[i] != '\n')
|
|
non_zero_count++;
|
|
}
|
|
if (!non_zero_count) {
|
|
int ch;
|
|
|
|
if (first && !zero_count) {
|
|
/* Line was erroneous just '0x'. */
|
|
goto error;
|
|
}
|
|
/*
|
|
* Line was 0x0..0, the sentinel for binutils. Remove
|
|
* the function and filename lines.
|
|
*/
|
|
zfree(&line);
|
|
do {
|
|
ch = io__get_char(io);
|
|
} while (ch > 0 && ch != '\n');
|
|
do {
|
|
ch = io__get_char(io);
|
|
} while (ch > 0 && ch != '\n');
|
|
return 0;
|
|
}
|
|
}
|
|
}
|
|
/* Read the second function name line (if inline data then this is the first line). */
|
|
if (first && (io__getline(io, &line, &line_len) < 0 || !line_len))
|
|
goto error;
|
|
|
|
pr_debug("%s %s: addr2line read line: %s", __func__, dso_name, line);
|
|
if (function != NULL)
|
|
*function = strdup(strim(line));
|
|
|
|
zfree(&line);
|
|
line_len = 0;
|
|
|
|
/* Read the third filename and line number line. */
|
|
if (io__getline(io, &line, &line_len) < 0 || !line_len)
|
|
goto error;
|
|
|
|
pr_debug("%s %s: addr2line filename:number : %s", __func__, dso_name, line);
|
|
if (filename_split(line, line_nr == NULL ? &dummy_line_nr : line_nr) == 0 &&
|
|
style == GNU_BINUTILS) {
|
|
ret = 0;
|
|
goto error;
|
|
}
|
|
|
|
if (filename != NULL)
|
|
*filename = strdup(line);
|
|
|
|
zfree(&line);
|
|
line_len = 0;
|
|
|
|
return 1;
|
|
|
|
error:
|
|
free(line);
|
|
if (function != NULL)
|
|
zfree(function);
|
|
if (filename != NULL)
|
|
zfree(filename);
|
|
return ret;
|
|
}
|
|
|
|
static int inline_list__append_record(struct dso *dso,
|
|
struct inline_node *node,
|
|
struct symbol *sym,
|
|
const char *function,
|
|
const char *filename,
|
|
unsigned int line_nr)
|
|
{
|
|
struct symbol *inline_sym = new_inline_sym(dso, sym, function);
|
|
|
|
return inline_list__append(inline_sym, srcline_from_fileline(filename, line_nr), node);
|
|
}
|
|
|
|
static int addr2line(const char *dso_name, u64 addr,
|
|
char **file, unsigned int *line_nr,
|
|
struct dso *dso,
|
|
bool unwind_inlines,
|
|
struct inline_node *node,
|
|
struct symbol *sym __maybe_unused)
|
|
{
|
|
struct child_process *a2l = dso->a2l;
|
|
char *record_function = NULL;
|
|
char *record_filename = NULL;
|
|
unsigned int record_line_nr = 0;
|
|
int record_status = -1;
|
|
int ret = 0;
|
|
size_t inline_count = 0;
|
|
int len;
|
|
char buf[128];
|
|
ssize_t written;
|
|
struct io io = { .eof = false };
|
|
enum a2l_style a2l_style;
|
|
|
|
if (!a2l) {
|
|
if (!filename__has_section(dso_name, ".debug_line"))
|
|
goto out;
|
|
|
|
dso->a2l = addr2line_subprocess_init(symbol_conf.addr2line_path, dso_name);
|
|
a2l = dso->a2l;
|
|
}
|
|
|
|
if (a2l == NULL) {
|
|
if (!symbol_conf.disable_add2line_warn)
|
|
pr_warning("%s %s: addr2line_subprocess_init failed\n", __func__, dso_name);
|
|
goto out;
|
|
}
|
|
a2l_style = addr2line_configure(a2l, dso_name);
|
|
if (a2l_style == BROKEN)
|
|
goto out;
|
|
|
|
/*
|
|
* Send our request and then *deliberately* send something that can't be
|
|
* interpreted as a valid address to ask addr2line about (namely,
|
|
* ","). This causes addr2line to first write out the answer to our
|
|
* request, in an unbounded/unknown number of records, and then to write
|
|
* out the lines "0x0...0", "??" and "??:0", for GNU binutils, or ","
|
|
* for llvm-addr2line, so that we can detect when it has finished giving
|
|
* us anything useful.
|
|
*/
|
|
len = snprintf(buf, sizeof(buf), "%016"PRIx64"\n,\n", addr);
|
|
written = len > 0 ? write(a2l->in, buf, len) : -1;
|
|
if (written != len) {
|
|
if (!symbol_conf.disable_add2line_warn)
|
|
pr_warning("%s %s: could not send request\n", __func__, dso_name);
|
|
goto out;
|
|
}
|
|
io__init(&io, a2l->out, buf, sizeof(buf));
|
|
io.timeout_ms = addr2line_timeout_ms;
|
|
switch (read_addr2line_record(&io, a2l_style, dso_name, addr, /*first=*/true,
|
|
&record_function, &record_filename, &record_line_nr)) {
|
|
case -1:
|
|
if (!symbol_conf.disable_add2line_warn)
|
|
pr_warning("%s %s: could not read first record\n", __func__, dso_name);
|
|
goto out;
|
|
case 0:
|
|
/*
|
|
* The first record was invalid, so return failure, but first
|
|
* read another record, since we sent a sentinel ',' for the
|
|
* sake of detected the last inlined function. Treat this as the
|
|
* first of a record as the ',' generates a new start with GNU
|
|
* binutils, also force a non-zero address as we're no longer
|
|
* reading that record.
|
|
*/
|
|
switch (read_addr2line_record(&io, a2l_style, dso_name,
|
|
/*addr=*/1, /*first=*/true,
|
|
NULL, NULL, NULL)) {
|
|
case -1:
|
|
if (!symbol_conf.disable_add2line_warn)
|
|
pr_warning("%s %s: could not read sentinel record\n",
|
|
__func__, dso_name);
|
|
break;
|
|
case 0:
|
|
/* The sentinel as expected. */
|
|
break;
|
|
default:
|
|
if (!symbol_conf.disable_add2line_warn)
|
|
pr_warning("%s %s: unexpected record instead of sentinel",
|
|
__func__, dso_name);
|
|
break;
|
|
}
|
|
goto out;
|
|
default:
|
|
/* First record as expected. */
|
|
break;
|
|
}
|
|
|
|
if (file) {
|
|
*file = strdup(record_filename);
|
|
ret = 1;
|
|
}
|
|
if (line_nr)
|
|
*line_nr = record_line_nr;
|
|
|
|
if (unwind_inlines) {
|
|
if (node && inline_list__append_record(dso, node, sym,
|
|
record_function,
|
|
record_filename,
|
|
record_line_nr)) {
|
|
ret = 0;
|
|
goto out;
|
|
}
|
|
}
|
|
|
|
/*
|
|
* We have to read the records even if we don't care about the inline
|
|
* info. This isn't the first record and force the address to non-zero
|
|
* as we're reading records beyond the first.
|
|
*/
|
|
while ((record_status = read_addr2line_record(&io,
|
|
a2l_style,
|
|
dso_name,
|
|
/*addr=*/1,
|
|
/*first=*/false,
|
|
&record_function,
|
|
&record_filename,
|
|
&record_line_nr)) == 1) {
|
|
if (unwind_inlines && node && inline_count++ < MAX_INLINE_NEST) {
|
|
if (inline_list__append_record(dso, node, sym,
|
|
record_function,
|
|
record_filename,
|
|
record_line_nr)) {
|
|
ret = 0;
|
|
goto out;
|
|
}
|
|
ret = 1; /* found at least one inline frame */
|
|
}
|
|
}
|
|
|
|
out:
|
|
free(record_function);
|
|
free(record_filename);
|
|
if (io.eof) {
|
|
dso->a2l = NULL;
|
|
addr2line_subprocess_cleanup(a2l);
|
|
}
|
|
return ret;
|
|
}
|
|
|
|
void dso__free_a2l(struct dso *dso)
|
|
{
|
|
struct child_process *a2l = dso->a2l;
|
|
|
|
if (!a2l)
|
|
return;
|
|
|
|
addr2line_subprocess_cleanup(a2l);
|
|
|
|
dso->a2l = NULL;
|
|
}
|
|
|
|
#endif /* HAVE_LIBBFD_SUPPORT */
|
|
|
|
static struct inline_node *addr2inlines(const char *dso_name, u64 addr,
|
|
struct dso *dso, struct symbol *sym)
|
|
{
|
|
struct inline_node *node;
|
|
|
|
node = zalloc(sizeof(*node));
|
|
if (node == NULL) {
|
|
perror("not enough memory for the inline node");
|
|
return NULL;
|
|
}
|
|
|
|
INIT_LIST_HEAD(&node->val);
|
|
node->addr = addr;
|
|
|
|
addr2line(dso_name, addr, NULL, NULL, dso, true, node, sym);
|
|
return node;
|
|
}
|
|
|
|
/*
|
|
* Number of addr2line failures (without success) before disabling it for that
|
|
* dso.
|
|
*/
|
|
#define A2L_FAIL_LIMIT 123
|
|
|
|
char *__get_srcline(struct dso *dso, u64 addr, struct symbol *sym,
|
|
bool show_sym, bool show_addr, bool unwind_inlines,
|
|
u64 ip)
|
|
{
|
|
char *file = NULL;
|
|
unsigned line = 0;
|
|
char *srcline;
|
|
const char *dso_name;
|
|
|
|
if (!dso->has_srcline)
|
|
goto out;
|
|
|
|
dso_name = dso__name(dso);
|
|
if (dso_name == NULL)
|
|
goto out;
|
|
|
|
if (!addr2line(dso_name, addr, &file, &line, dso,
|
|
unwind_inlines, NULL, sym))
|
|
goto out;
|
|
|
|
srcline = srcline_from_fileline(file, line);
|
|
free(file);
|
|
|
|
if (!srcline)
|
|
goto out;
|
|
|
|
dso->a2l_fails = 0;
|
|
|
|
return srcline;
|
|
|
|
out:
|
|
if (dso->a2l_fails && ++dso->a2l_fails > A2L_FAIL_LIMIT) {
|
|
dso->has_srcline = 0;
|
|
dso__free_a2l(dso);
|
|
}
|
|
|
|
if (!show_addr)
|
|
return (show_sym && sym) ?
|
|
strndup(sym->name, sym->namelen) : SRCLINE_UNKNOWN;
|
|
|
|
if (sym) {
|
|
if (asprintf(&srcline, "%s+%" PRIu64, show_sym ? sym->name : "",
|
|
ip - sym->start) < 0)
|
|
return SRCLINE_UNKNOWN;
|
|
} else if (asprintf(&srcline, "%s[%" PRIx64 "]", dso->short_name, addr) < 0)
|
|
return SRCLINE_UNKNOWN;
|
|
return srcline;
|
|
}
|
|
|
|
/* Returns filename and fills in line number in line */
|
|
char *get_srcline_split(struct dso *dso, u64 addr, unsigned *line)
|
|
{
|
|
char *file = NULL;
|
|
const char *dso_name;
|
|
|
|
if (!dso->has_srcline)
|
|
goto out;
|
|
|
|
dso_name = dso__name(dso);
|
|
if (dso_name == NULL)
|
|
goto out;
|
|
|
|
if (!addr2line(dso_name, addr, &file, line, dso, true, NULL, NULL))
|
|
goto out;
|
|
|
|
dso->a2l_fails = 0;
|
|
return file;
|
|
|
|
out:
|
|
if (dso->a2l_fails && ++dso->a2l_fails > A2L_FAIL_LIMIT) {
|
|
dso->has_srcline = 0;
|
|
dso__free_a2l(dso);
|
|
}
|
|
|
|
return NULL;
|
|
}
|
|
|
|
void zfree_srcline(char **srcline)
|
|
{
|
|
if (*srcline == NULL)
|
|
return;
|
|
|
|
if (*srcline != SRCLINE_UNKNOWN)
|
|
free(*srcline);
|
|
|
|
*srcline = NULL;
|
|
}
|
|
|
|
char *get_srcline(struct dso *dso, u64 addr, struct symbol *sym,
|
|
bool show_sym, bool show_addr, u64 ip)
|
|
{
|
|
return __get_srcline(dso, addr, sym, show_sym, show_addr, false, ip);
|
|
}
|
|
|
|
struct srcline_node {
|
|
u64 addr;
|
|
char *srcline;
|
|
struct rb_node rb_node;
|
|
};
|
|
|
|
void srcline__tree_insert(struct rb_root_cached *tree, u64 addr, char *srcline)
|
|
{
|
|
struct rb_node **p = &tree->rb_root.rb_node;
|
|
struct rb_node *parent = NULL;
|
|
struct srcline_node *i, *node;
|
|
bool leftmost = true;
|
|
|
|
node = zalloc(sizeof(struct srcline_node));
|
|
if (!node) {
|
|
perror("not enough memory for the srcline node");
|
|
return;
|
|
}
|
|
|
|
node->addr = addr;
|
|
node->srcline = srcline;
|
|
|
|
while (*p != NULL) {
|
|
parent = *p;
|
|
i = rb_entry(parent, struct srcline_node, rb_node);
|
|
if (addr < i->addr)
|
|
p = &(*p)->rb_left;
|
|
else {
|
|
p = &(*p)->rb_right;
|
|
leftmost = false;
|
|
}
|
|
}
|
|
rb_link_node(&node->rb_node, parent, p);
|
|
rb_insert_color_cached(&node->rb_node, tree, leftmost);
|
|
}
|
|
|
|
char *srcline__tree_find(struct rb_root_cached *tree, u64 addr)
|
|
{
|
|
struct rb_node *n = tree->rb_root.rb_node;
|
|
|
|
while (n) {
|
|
struct srcline_node *i = rb_entry(n, struct srcline_node,
|
|
rb_node);
|
|
|
|
if (addr < i->addr)
|
|
n = n->rb_left;
|
|
else if (addr > i->addr)
|
|
n = n->rb_right;
|
|
else
|
|
return i->srcline;
|
|
}
|
|
|
|
return NULL;
|
|
}
|
|
|
|
void srcline__tree_delete(struct rb_root_cached *tree)
|
|
{
|
|
struct srcline_node *pos;
|
|
struct rb_node *next = rb_first_cached(tree);
|
|
|
|
while (next) {
|
|
pos = rb_entry(next, struct srcline_node, rb_node);
|
|
next = rb_next(&pos->rb_node);
|
|
rb_erase_cached(&pos->rb_node, tree);
|
|
zfree_srcline(&pos->srcline);
|
|
zfree(&pos);
|
|
}
|
|
}
|
|
|
|
struct inline_node *dso__parse_addr_inlines(struct dso *dso, u64 addr,
|
|
struct symbol *sym)
|
|
{
|
|
const char *dso_name;
|
|
|
|
dso_name = dso__name(dso);
|
|
if (dso_name == NULL)
|
|
return NULL;
|
|
|
|
return addr2inlines(dso_name, addr, dso, sym);
|
|
}
|
|
|
|
void inline_node__delete(struct inline_node *node)
|
|
{
|
|
struct inline_list *ilist, *tmp;
|
|
|
|
list_for_each_entry_safe(ilist, tmp, &node->val, list) {
|
|
list_del_init(&ilist->list);
|
|
zfree_srcline(&ilist->srcline);
|
|
/* only the inlined symbols are owned by the list */
|
|
if (ilist->symbol && ilist->symbol->inlined)
|
|
symbol__delete(ilist->symbol);
|
|
free(ilist);
|
|
}
|
|
|
|
free(node);
|
|
}
|
|
|
|
void inlines__tree_insert(struct rb_root_cached *tree,
|
|
struct inline_node *inlines)
|
|
{
|
|
struct rb_node **p = &tree->rb_root.rb_node;
|
|
struct rb_node *parent = NULL;
|
|
const u64 addr = inlines->addr;
|
|
struct inline_node *i;
|
|
bool leftmost = true;
|
|
|
|
while (*p != NULL) {
|
|
parent = *p;
|
|
i = rb_entry(parent, struct inline_node, rb_node);
|
|
if (addr < i->addr)
|
|
p = &(*p)->rb_left;
|
|
else {
|
|
p = &(*p)->rb_right;
|
|
leftmost = false;
|
|
}
|
|
}
|
|
rb_link_node(&inlines->rb_node, parent, p);
|
|
rb_insert_color_cached(&inlines->rb_node, tree, leftmost);
|
|
}
|
|
|
|
struct inline_node *inlines__tree_find(struct rb_root_cached *tree, u64 addr)
|
|
{
|
|
struct rb_node *n = tree->rb_root.rb_node;
|
|
|
|
while (n) {
|
|
struct inline_node *i = rb_entry(n, struct inline_node,
|
|
rb_node);
|
|
|
|
if (addr < i->addr)
|
|
n = n->rb_left;
|
|
else if (addr > i->addr)
|
|
n = n->rb_right;
|
|
else
|
|
return i;
|
|
}
|
|
|
|
return NULL;
|
|
}
|
|
|
|
void inlines__tree_delete(struct rb_root_cached *tree)
|
|
{
|
|
struct inline_node *pos;
|
|
struct rb_node *next = rb_first_cached(tree);
|
|
|
|
while (next) {
|
|
pos = rb_entry(next, struct inline_node, rb_node);
|
|
next = rb_next(&pos->rb_node);
|
|
rb_erase_cached(&pos->rb_node, tree);
|
|
inline_node__delete(pos);
|
|
}
|
|
}
|