Squashed 'third_party/elfutils/' content from commit 555e15e
Change-Id: I61cde98949e47e5c8c09c33260de17f30921be79
git-subtree-dir: third_party/elfutils
git-subtree-split: 555e15ebe8bf1eb33d00747173cfc80cc65648a4
diff --git a/src/stack.c b/src/stack.c
new file mode 100644
index 0000000..52ae3a8
--- /dev/null
+++ b/src/stack.c
@@ -0,0 +1,759 @@
+/* Unwinding of frames like gstack/pstack.
+ Copyright (C) 2013-2014 Red Hat, Inc.
+ This file is part of elfutils.
+
+ This file is free software; you can redistribute it and/or modify
+ it under the terms of the GNU General Public License as published by
+ the Free Software Foundation; either version 3 of the License, or
+ (at your option) any later version.
+
+ elfutils is distributed in the hope that it will be useful, but
+ WITHOUT ANY WARRANTY; without even the implied warranty of
+ MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ GNU General Public License for more details.
+
+ You should have received a copy of the GNU General Public License
+ along with this program. If not, see <http://www.gnu.org/licenses/>. */
+
+#include <config.h>
+#include <assert.h>
+#include <argp.h>
+#include <error.h>
+#include <stdlib.h>
+#include <inttypes.h>
+#include <stdio.h>
+#include <stdio_ext.h>
+#include <string.h>
+#include <locale.h>
+#include <fcntl.h>
+#include ELFUTILS_HEADER(dwfl)
+
+#include <dwarf.h>
+#include <system.h>
+#include <printversion.h>
+
+/* Name and version of program. */
+ARGP_PROGRAM_VERSION_HOOK_DEF = print_version;
+
+/* Bug report address. */
+ARGP_PROGRAM_BUG_ADDRESS_DEF = PACKAGE_BUGREPORT;
+
+/* non-printable argp options. */
+#define OPT_DEBUGINFO 0x100
+#define OPT_COREFILE 0x101
+
+static bool show_activation = false;
+static bool show_module = false;
+static bool show_build_id = false;
+static bool show_source = false;
+static bool show_one_tid = false;
+static bool show_quiet = false;
+static bool show_raw = false;
+static bool show_modules = false;
+static bool show_debugname = false;
+static bool show_inlines = false;
+
+static int maxframes = 256;
+
+struct frame
+{
+ Dwarf_Addr pc;
+ bool isactivation;
+};
+
+struct frames
+{
+ int frames;
+ int allocated;
+ struct frame *frame;
+};
+
+static Dwfl *dwfl = NULL;
+static pid_t pid = 0;
+static int core_fd = -1;
+static Elf *core = NULL;
+static const char *exec = NULL;
+static char *debuginfo_path = NULL;
+
+static const Dwfl_Callbacks proc_callbacks =
+ {
+ .find_elf = dwfl_linux_proc_find_elf,
+ .find_debuginfo = dwfl_standard_find_debuginfo,
+ .debuginfo_path = &debuginfo_path,
+ };
+
+static const Dwfl_Callbacks core_callbacks =
+ {
+ .find_elf = dwfl_build_id_find_elf,
+ .find_debuginfo = dwfl_standard_find_debuginfo,
+ .debuginfo_path = &debuginfo_path,
+ };
+
+#ifdef USE_DEMANGLE
+static size_t demangle_buffer_len = 0;
+static char *demangle_buffer = NULL;
+#endif
+
+/* Whether any frames have been shown at all. Determines exit status. */
+static bool frames_shown = false;
+
+/* Program exit codes. All frames shown without any errors is GOOD.
+ Some frames shown with some non-fatal errors is an ERROR. A fatal
+ error or no frames shown at all is BAD. A command line USAGE exit
+ is generated by argp_error. */
+#define EXIT_OK 0
+#define EXIT_ERROR 1
+#define EXIT_BAD 2
+#define EXIT_USAGE 64
+
+static int
+get_addr_width (Dwfl_Module *mod)
+{
+ // Try to find the address wide if possible.
+ static int width = 0;
+ if (width == 0 && mod)
+ {
+ Dwarf_Addr bias;
+ Elf *elf = dwfl_module_getelf (mod, &bias);
+ if (elf)
+ {
+ GElf_Ehdr ehdr_mem;
+ GElf_Ehdr *ehdr = gelf_getehdr (elf, &ehdr_mem);
+ if (ehdr)
+ width = ehdr->e_ident[EI_CLASS] == ELFCLASS32 ? 8 : 16;
+ }
+ }
+ if (width == 0)
+ width = 16;
+
+ return width;
+}
+
+static int
+module_callback (Dwfl_Module *mod, void **userdata __attribute__((unused)),
+ const char *name, Dwarf_Addr start,
+ void *arg __attribute__((unused)))
+{
+ /* Forces resolving of main elf and debug files. */
+ Dwarf_Addr bias;
+ Elf *elf = dwfl_module_getelf (mod, &bias);
+ Dwarf *dwarf = dwfl_module_getdwarf (mod, &bias);
+
+ Dwarf_Addr end;
+ const char *mainfile;
+ const char *debugfile;
+ const char *modname = dwfl_module_info (mod, NULL, NULL, &end, NULL,
+ NULL, &mainfile, &debugfile);
+ assert (strcmp (modname, name) == 0);
+
+ int width = get_addr_width (mod);
+ printf ("0x%0*" PRIx64 "-0x%0*" PRIx64 " %s\n",
+ width, start, width, end, basename (name));
+
+ const unsigned char *id;
+ GElf_Addr id_vaddr;
+ int id_len = dwfl_module_build_id (mod, &id, &id_vaddr);
+ if (id_len > 0)
+ {
+ printf (" [");
+ do
+ printf ("%02" PRIx8, *id++);
+ while (--id_len > 0);
+ printf ("]\n");
+ }
+
+ if (elf != NULL)
+ printf (" %s\n", mainfile != NULL ? mainfile : "-");
+ if (dwarf != NULL)
+ printf (" %s\n", debugfile != NULL ? debugfile : "-");
+
+ return DWARF_CB_OK;
+}
+
+static int
+frame_callback (Dwfl_Frame *state, void *arg)
+{
+ struct frames *frames = (struct frames *) arg;
+ int nr = frames->frames;
+ if (! dwfl_frame_pc (state, &frames->frame[nr].pc,
+ &frames->frame[nr].isactivation))
+ return -1;
+
+ frames->frames++;
+ if (frames->frames == maxframes)
+ return DWARF_CB_ABORT;
+
+ if (frames->frames == frames->allocated)
+ {
+ frames->allocated *= 2;
+ frames->frame = realloc (frames->frame,
+ sizeof (struct frame) * frames->allocated);
+ if (frames->frame == NULL)
+ error (EXIT_BAD, errno, "realloc frames.frame");
+ }
+
+ return DWARF_CB_OK;
+}
+
+static const char*
+die_name (Dwarf_Die *die)
+{
+ Dwarf_Attribute attr;
+ const char *name;
+ name = dwarf_formstring (dwarf_attr_integrate (die,
+ DW_AT_MIPS_linkage_name,
+ &attr)
+ ?: dwarf_attr_integrate (die,
+ DW_AT_linkage_name,
+ &attr));
+ if (name == NULL)
+ name = dwarf_diename (die);
+
+ return name;
+}
+
+static void
+print_frame (int nr, Dwarf_Addr pc, bool isactivation,
+ Dwarf_Addr pc_adjusted, Dwfl_Module *mod,
+ const char *symname, Dwarf_Die *cudie,
+ Dwarf_Die *die)
+{
+ int width = get_addr_width (mod);
+ printf ("#%-2u 0x%0*" PRIx64, nr, width, (uint64_t) pc);
+
+ if (show_activation)
+ printf ("%4s", ! isactivation ? "- 1" : "");
+
+ if (symname != NULL)
+ {
+#ifdef USE_DEMANGLE
+ // Require GNU v3 ABI by the "_Z" prefix.
+ if (! show_raw && symname[0] == '_' && symname[1] == 'Z')
+ {
+ int status = -1;
+ char *dsymname = __cxa_demangle (symname, demangle_buffer,
+ &demangle_buffer_len, &status);
+ if (status == 0)
+ symname = demangle_buffer = dsymname;
+ }
+#endif
+ printf (" %s", symname);
+ }
+
+ const char* fname;
+ Dwarf_Addr start;
+ fname = dwfl_module_info(mod, NULL, &start,
+ NULL, NULL, NULL, NULL, NULL);
+ if (show_module)
+ {
+ if (fname != NULL)
+ printf (" - %s", fname);
+ }
+
+ if (show_build_id)
+ {
+ const unsigned char *id;
+ GElf_Addr id_vaddr;
+ int id_len = dwfl_module_build_id (mod, &id, &id_vaddr);
+ if (id_len > 0)
+ {
+ printf ("\n [");
+ do
+ printf ("%02" PRIx8, *id++);
+ while (--id_len > 0);
+ printf ("]@0x%0" PRIx64 "+0x%" PRIx64,
+ start, pc_adjusted - start);
+ }
+ }
+
+ if (show_source)
+ {
+ int line, col;
+ const char* sname;
+ line = col = -1;
+ sname = NULL;
+ if (die != NULL)
+ {
+ Dwarf_Files *files;
+ if (dwarf_getsrcfiles (cudie, &files, NULL) == 0)
+ {
+ Dwarf_Attribute attr;
+ Dwarf_Word val;
+ if (dwarf_formudata (dwarf_attr (die, DW_AT_call_file, &attr),
+ &val) == 0)
+ {
+ sname = dwarf_filesrc (files, val, NULL, NULL);
+ if (dwarf_formudata (dwarf_attr (die, DW_AT_call_line,
+ &attr), &val) == 0)
+ {
+ line = val;
+ if (dwarf_formudata (dwarf_attr (die, DW_AT_call_column,
+ &attr), &val) == 0)
+ col = val;
+ }
+ }
+ }
+ }
+ else
+ {
+ Dwfl_Line *lineobj = dwfl_module_getsrc(mod, pc_adjusted);
+ if (lineobj)
+ sname = dwfl_lineinfo (lineobj, NULL, &line, &col, NULL, NULL);
+ }
+
+ if (sname != NULL)
+ {
+ printf ("\n %s", sname);
+ if (line > 0)
+ {
+ printf (":%d", line);
+ if (col > 0)
+ printf (":%d", col);
+ }
+ }
+ }
+ printf ("\n");
+}
+
+static void
+print_inline_frames (int *nr, Dwarf_Addr pc, bool isactivation,
+ Dwarf_Addr pc_adjusted, Dwfl_Module *mod,
+ const char *symname, Dwarf_Die *cudie, Dwarf_Die *die)
+{
+ Dwarf_Die *scopes = NULL;
+ int nscopes = dwarf_getscopes_die (die, &scopes);
+ if (nscopes > 0)
+ {
+ /* scopes[0] == die, the lowest level, for which we already have
+ the name. This is the actual source location where it
+ happened. */
+ print_frame ((*nr)++, pc, isactivation, pc_adjusted, mod, symname,
+ NULL, NULL);
+
+ /* last_scope is the source location where the next frame/function
+ call was done. */
+ Dwarf_Die *last_scope = &scopes[0];
+ for (int i = 1; i < nscopes && (maxframes == 0 || *nr < maxframes); i++)
+ {
+ Dwarf_Die *scope = &scopes[i];
+ int tag = dwarf_tag (scope);
+ if (tag != DW_TAG_inlined_subroutine
+ && tag != DW_TAG_entry_point
+ && tag != DW_TAG_subprogram)
+ continue;
+
+ symname = die_name (scope);
+ print_frame ((*nr)++, pc, isactivation, pc_adjusted, mod, symname,
+ cudie, last_scope);
+
+ /* Found the "top-level" in which everything was inlined? */
+ if (tag == DW_TAG_subprogram)
+ break;
+
+ last_scope = scope;
+ }
+ }
+ free (scopes);
+}
+
+static void
+print_frames (struct frames *frames, pid_t tid, int dwflerr, const char *what)
+{
+ if (frames->frames > 0)
+ frames_shown = true;
+
+ printf ("TID %lld:\n", (long long) tid);
+ int frame_nr = 0;
+ for (int nr = 0; nr < frames->frames && (maxframes == 0
+ || frame_nr < maxframes); nr++)
+ {
+ Dwarf_Addr pc = frames->frame[nr].pc;
+ bool isactivation = frames->frame[nr].isactivation;
+ Dwarf_Addr pc_adjusted = pc - (isactivation ? 0 : 1);
+
+ /* Get PC->SYMNAME. */
+ Dwfl_Module *mod = dwfl_addrmodule (dwfl, pc_adjusted);
+ const char *symname = NULL;
+ Dwarf_Die die_mem;
+ Dwarf_Die *die = NULL;
+ Dwarf_Die *cudie = NULL;
+ if (mod && ! show_quiet)
+ {
+ if (show_debugname)
+ {
+ Dwarf_Addr bias = 0;
+ Dwarf_Die *scopes = NULL;
+ cudie = dwfl_module_addrdie (mod, pc_adjusted, &bias);
+ int nscopes = dwarf_getscopes (cudie, pc_adjusted - bias,
+ &scopes);
+
+ /* Find the first function-like DIE with a name in scope. */
+ for (int i = 0; symname == NULL && i < nscopes; i++)
+ {
+ Dwarf_Die *scope = &scopes[i];
+ int tag = dwarf_tag (scope);
+ if (tag == DW_TAG_subprogram
+ || tag == DW_TAG_inlined_subroutine
+ || tag == DW_TAG_entry_point)
+ symname = die_name (scope);
+
+ if (symname != NULL)
+ {
+ die_mem = *scope;
+ die = &die_mem;
+ }
+ }
+ free (scopes);
+ }
+
+ if (symname == NULL)
+ symname = dwfl_module_addrname (mod, pc_adjusted);
+ }
+
+ if (show_inlines && die != NULL)
+ print_inline_frames (&frame_nr, pc, isactivation, pc_adjusted, mod,
+ symname, cudie, die);
+ else
+ print_frame (frame_nr++, pc, isactivation, pc_adjusted, mod, symname,
+ NULL, NULL);
+ }
+
+ if (frames->frames > 0 && frame_nr == maxframes)
+ error (0, 0, "tid %lld: shown max number of frames "
+ "(%d, use -n 0 for unlimited)", (long long) tid, maxframes);
+ else if (dwflerr != 0)
+ {
+ if (frames->frames > 0)
+ {
+ unsigned nr = frames->frames - 1;
+ Dwarf_Addr pc = frames->frame[nr].pc;
+ bool isactivation = frames->frame[nr].isactivation;
+ Dwarf_Addr pc_adjusted = pc - (isactivation ? 0 : 1);
+ Dwfl_Module *mod = dwfl_addrmodule (dwfl, pc_adjusted);
+ const char *mainfile = NULL;
+ const char *modname = dwfl_module_info (mod, NULL, NULL, NULL, NULL,
+ NULL, &mainfile, NULL);
+ if (modname == NULL || modname[0] == '\0')
+ {
+ if (mainfile != NULL)
+ modname = mainfile;
+ else
+ modname = "<unknown>";
+ }
+ error (0, 0, "%s tid %lld at 0x%" PRIx64 " in %s: %s", what,
+ (long long) tid, pc_adjusted, modname, dwfl_errmsg (dwflerr));
+ }
+ else
+ error (0, 0, "%s tid %lld: %s", what, (long long) tid,
+ dwfl_errmsg (dwflerr));
+ }
+}
+
+static int
+thread_callback (Dwfl_Thread *thread, void *thread_arg)
+{
+ struct frames *frames = (struct frames *) thread_arg;
+ pid_t tid = dwfl_thread_tid (thread);
+ int err = 0;
+ frames->frames = 0;
+ switch (dwfl_thread_getframes (thread, frame_callback, thread_arg))
+ {
+ case DWARF_CB_OK:
+ case DWARF_CB_ABORT:
+ break;
+ case -1:
+ err = dwfl_errno ();
+ break;
+ default:
+ abort ();
+ }
+ print_frames (frames, tid, err, "dwfl_thread_getframes");
+ return DWARF_CB_OK;
+}
+
+static error_t
+parse_opt (int key, char *arg __attribute__ ((unused)),
+ struct argp_state *state)
+{
+ switch (key)
+ {
+ case 'p':
+ pid = atoi (arg);
+ if (pid == 0)
+ argp_error (state, N_("-p PID should be a positive process id."));
+ break;
+
+ case OPT_COREFILE:
+ core_fd = open (arg, O_RDONLY);
+ if (core_fd < 0)
+ error (EXIT_BAD, errno, N_("Cannot open core file '%s'"), arg);
+ elf_version (EV_CURRENT);
+ core = elf_begin (core_fd, ELF_C_READ_MMAP, NULL);
+ if (core == NULL)
+ error (EXIT_BAD, 0, "core '%s' elf_begin: %s", arg, elf_errmsg(-1));
+ break;
+
+ case 'e':
+ exec = arg;
+ break;
+
+ case OPT_DEBUGINFO:
+ debuginfo_path = arg;
+ break;
+
+ case 'm':
+ show_module = true;
+ break;
+
+ case 's':
+ show_source = true;
+ break;
+
+ case 'a':
+ show_activation = true;
+ break;
+
+ case 'd':
+ show_debugname = true;
+ break;
+
+ case 'i':
+ show_inlines = show_debugname = true;
+ break;
+
+ case 'v':
+ show_activation = show_source = show_module = show_debugname = true;
+ show_inlines = true;
+ break;
+
+ case 'b':
+ show_build_id = true;
+ break;
+
+ case 'q':
+ show_quiet = true;
+ break;
+
+ case 'r':
+ show_raw = true;
+ break;
+
+ case '1':
+ show_one_tid = true;
+ break;
+
+ case 'n':
+ maxframes = atoi (arg);
+ if (maxframes < 0)
+ {
+ argp_error (state, N_("-n MAXFRAMES should be 0 or higher."));
+ return EINVAL;
+ }
+ break;
+
+ case 'l':
+ show_modules = true;
+ break;
+
+ case ARGP_KEY_END:
+ if (core == NULL && exec != NULL)
+ argp_error (state,
+ N_("-e EXEC needs a core given by --core."));
+
+ if (pid == 0 && show_one_tid == true)
+ argp_error (state,
+ N_("-1 needs a thread id given by -p."));
+
+ if ((pid == 0 && core == NULL) || (pid != 0 && core != NULL))
+ argp_error (state,
+ N_("One of -p PID or --core COREFILE should be given."));
+
+ if (pid != 0)
+ {
+ dwfl = dwfl_begin (&proc_callbacks);
+ if (dwfl == NULL)
+ error (EXIT_BAD, 0, "dwfl_begin: %s", dwfl_errmsg (-1));
+
+ int err = dwfl_linux_proc_report (dwfl, pid);
+ if (err < 0)
+ error (EXIT_BAD, 0, "dwfl_linux_proc_report pid %lld: %s",
+ (long long) pid, dwfl_errmsg (-1));
+ else if (err > 0)
+ error (EXIT_BAD, err, "dwfl_linux_proc_report pid %lld",
+ (long long) pid);
+ }
+
+ if (core != NULL)
+ {
+ dwfl = dwfl_begin (&core_callbacks);
+ if (dwfl == NULL)
+ error (EXIT_BAD, 0, "dwfl_begin: %s", dwfl_errmsg (-1));
+ if (dwfl_core_file_report (dwfl, core, exec) < 0)
+ error (EXIT_BAD, 0, "dwfl_core_file_report: %s", dwfl_errmsg (-1));
+ }
+
+ if (dwfl_report_end (dwfl, NULL, NULL) != 0)
+ error (EXIT_BAD, 0, "dwfl_report_end: %s", dwfl_errmsg (-1));
+
+ if (pid != 0)
+ {
+ int err = dwfl_linux_proc_attach (dwfl, pid, false);
+ if (err < 0)
+ error (EXIT_BAD, 0, "dwfl_linux_proc_attach pid %lld: %s",
+ (long long) pid, dwfl_errmsg (-1));
+ else if (err > 0)
+ error (EXIT_BAD, err, "dwfl_linux_proc_attach pid %lld",
+ (long long) pid);
+ }
+
+ if (core != NULL)
+ {
+ if (dwfl_core_file_attach (dwfl, core) < 0)
+ error (EXIT_BAD, 0, "dwfl_core_file_report: %s", dwfl_errmsg (-1));
+ }
+
+ /* Makes sure we are properly attached. */
+ if (dwfl_pid (dwfl) < 0)
+ error (EXIT_BAD, 0, "dwfl_pid: %s\n", dwfl_errmsg (-1));
+ break;
+
+ default:
+ return ARGP_ERR_UNKNOWN;
+ }
+ return 0;
+}
+
+int
+main (int argc, char **argv)
+{
+ /* We use no threads here which can interfere with handling a stream. */
+ __fsetlocking (stdin, FSETLOCKING_BYCALLER);
+ __fsetlocking (stdout, FSETLOCKING_BYCALLER);
+ __fsetlocking (stderr, FSETLOCKING_BYCALLER);
+
+ /* Set locale. */
+ (void) setlocale (LC_ALL, "");
+
+ const struct argp_option options[] =
+ {
+ { NULL, 0, NULL, 0, N_("Input selection options:"), 0 },
+ { "pid", 'p', "PID", 0,
+ N_("Show stack of process PID"), 0 },
+ { "core", OPT_COREFILE, "COREFILE", 0,
+ N_("Show stack found in COREFILE"), 0 },
+ { "executable", 'e', "EXEC", 0, N_("(optional) EXECUTABLE that produced COREFILE"), 0 },
+ { "debuginfo-path", OPT_DEBUGINFO, "PATH", 0,
+ N_("Search path for separate debuginfo files"), 0 },
+
+ { NULL, 0, NULL, 0, N_("Output selection options:"), 0 },
+ { "activation", 'a', NULL, 0,
+ N_("Additionally show frame activation"), 0 },
+ { "debugname", 'd', NULL, 0,
+ N_("Additionally try to lookup DWARF debuginfo name for frame address"),
+ 0 },
+ { "inlines", 'i', NULL, 0,
+ N_("Additionally show inlined function frames using DWARF debuginfo if available (implies -d)"), 0 },
+ { "module", 'm', NULL, 0,
+ N_("Additionally show module file information"), 0 },
+ { "source", 's', NULL, 0,
+ N_("Additionally show source file information"), 0 },
+ { "verbose", 'v', NULL, 0,
+ N_("Show all additional information (activation, debugname, inlines, module and source)"), 0 },
+ { "quiet", 'q', NULL, 0,
+ N_("Do not resolve address to function symbol name"), 0 },
+ { "raw", 'r', NULL, 0,
+ N_("Show raw function symbol names, do not try to demangle names"), 0 },
+ { "build-id", 'b', NULL, 0,
+ N_("Show module build-id, load address and pc offset"), 0 },
+ { NULL, '1', NULL, 0,
+ N_("Show the backtrace of only one thread"), 0 },
+ { NULL, 'n', "MAXFRAMES", 0,
+ N_("Show at most MAXFRAMES per thread (default 256, use 0 for unlimited)"), 0 },
+ { "list-modules", 'l', NULL, 0,
+ N_("Show module memory map with build-id, elf and debug files detected"), 0 },
+ { NULL, 0, NULL, 0, NULL, 0 }
+ };
+
+ const struct argp argp =
+ {
+ .options = options,
+ .parser = parse_opt,
+ .doc = N_("Print a stack for each thread in a process or core file.\n\
+\n\
+Program exits with return code 0 if all frames were shown without \
+any errors. If some frames were shown, but there were some non-fatal \
+errors, possibly causing an incomplete backtrace, the program exits \
+with return code 1. If no frames could be shown, or a fatal error \
+occured the program exits with return code 2. If the program was \
+invoked with bad or missing arguments it will exit with return code 64.")
+ };
+
+ argp_parse (&argp, argc, argv, 0, NULL, NULL);
+
+ if (show_modules)
+ {
+ printf ("PID %lld - %s module memory map\n", (long long) dwfl_pid (dwfl),
+ pid != 0 ? "process" : "core");
+ if (dwfl_getmodules (dwfl, module_callback, NULL, 0) != 0)
+ error (EXIT_BAD, 0, "dwfl_getmodules: %s", dwfl_errmsg (-1));
+ }
+
+ struct frames frames;
+ /* When maxframes is zero, then 2048 is just the initial allocation
+ that will be increased using realloc in framecallback (). */
+ frames.allocated = maxframes == 0 ? 2048 : maxframes;
+ frames.frames = 0;
+ frames.frame = malloc (sizeof (struct frame) * frames.allocated);
+ if (frames.frame == NULL)
+ error (EXIT_BAD, errno, "malloc frames.frame");
+
+ if (show_one_tid)
+ {
+ int err = 0;
+ switch (dwfl_getthread_frames (dwfl, pid, frame_callback, &frames))
+ {
+ case DWARF_CB_OK:
+ case DWARF_CB_ABORT:
+ break;
+ case -1:
+ err = dwfl_errno ();
+ break;
+ default:
+ abort ();
+ }
+ print_frames (&frames, pid, err, "dwfl_getthread_frames");
+ }
+ else
+ {
+ printf ("PID %lld - %s\n", (long long) dwfl_pid (dwfl),
+ pid != 0 ? "process" : "core");
+ switch (dwfl_getthreads (dwfl, thread_callback, &frames))
+ {
+ case DWARF_CB_OK:
+ case DWARF_CB_ABORT:
+ break;
+ case -1:
+ error (0, 0, "dwfl_getthreads: %s", dwfl_errmsg (-1));
+ break;
+ default:
+ abort ();
+ }
+ }
+ free (frames.frame);
+ dwfl_end (dwfl);
+
+ if (core != NULL)
+ elf_end (core);
+
+ if (core_fd != -1)
+ close (core_fd);
+
+#ifdef USE_DEMANGLE
+ free (demangle_buffer);
+#endif
+
+ if (! frames_shown)
+ error (EXIT_BAD, 0, N_("Couldn't show any frames."));
+
+ return error_message_count != 0 ? EXIT_ERROR : EXIT_OK;
+}