Display per-thread information for threads in FreeBSD cores.
Display the LWP ID of each thread in a FreeBSD core. Extract thread names from the per-thread THRMISC note. gdb/ChangeLog: * fbsd_tdep.c (fbsd_core_pid_to_str): New function. (fbsd_core_thread_name): New function. (fbsd_init_abi): Add "core_pid_to_str" gdbarch method. Add "core_thread_name" gdbarch method.
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@ -1,3 +1,10 @@
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2016-01-19 John Baldwin <jhb@FreeBSD.org>
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* fbsd_tdep.c (fbsd_core_pid_to_str): New function.
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(fbsd_core_thread_name): New function.
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(fbsd_init_abi): Add "core_pid_to_str" gdbarch method.
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Add "core_thread_name" gdbarch method.
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2016-01-19 John Baldwin <jhb@FreeBSD.org>
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2016-01-19 John Baldwin <jhb@FreeBSD.org>
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* corelow.c (core_thread_name): New function.
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* corelow.c (core_thread_name): New function.
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@ -28,6 +28,70 @@
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#include "fbsd-tdep.h"
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#include "fbsd-tdep.h"
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/* This is how we want PTIDs from core files to be printed. */
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static char *
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fbsd_core_pid_to_str (struct gdbarch *gdbarch, ptid_t ptid)
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{
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static char buf[80];
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if (ptid_get_lwp (ptid) != 0)
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{
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xsnprintf (buf, sizeof buf, "LWP %ld", ptid_get_lwp (ptid));
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return buf;
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}
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return normal_pid_to_str (ptid);
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}
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/* Extract the name assigned to a thread from a core. Returns the
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string in a static buffer. */
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static const char *
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fbsd_core_thread_name (struct gdbarch *gdbarch, struct thread_info *thr)
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{
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static char buf[80];
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struct bfd_section *section;
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bfd_size_type size;
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char sectionstr[32];
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if (ptid_get_lwp (thr->ptid) != 0)
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{
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/* FreeBSD includes a NT_FREEBSD_THRMISC note for each thread
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whose contents are defined by a "struct thrmisc" declared in
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<sys/procfs.h> on FreeBSD. The per-thread name is stored as
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a null-terminated string as the first member of the
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structure. Rather than define the full structure here, just
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extract the null-terminated name from the start of the
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note. */
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xsnprintf (sectionstr, sizeof sectionstr, ".thrmisc/%ld",
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ptid_get_lwp (thr->ptid));
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section = bfd_get_section_by_name (core_bfd, sectionstr);
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if (section != NULL && bfd_section_size (core_bfd, section) > 0)
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{
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/* Truncate the name if it is longer than "buf". */
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size = bfd_section_size (core_bfd, section);
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if (size > sizeof buf - 1)
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size = sizeof buf - 1;
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if (bfd_get_section_contents (core_bfd, section, buf, (file_ptr) 0,
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size)
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&& buf[0] != '\0')
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{
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buf[size] = '\0';
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/* Note that each thread will report the process command
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as its thread name instead of an empty name if a name
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has not been set explicitly. Return a NULL name in
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that case. */
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if (strcmp (buf, elf_tdata (core_bfd)->core->program) != 0)
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return buf;
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}
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}
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}
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return NULL;
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}
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static int
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static int
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find_signalled_thread (struct thread_info *info, void *data)
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find_signalled_thread (struct thread_info *info, void *data)
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{
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{
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@ -132,5 +196,7 @@ fbsd_make_corefile_notes (struct gdbarch *gdbarch, bfd *obfd, int *note_size)
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void
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void
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fbsd_init_abi (struct gdbarch_info info, struct gdbarch *gdbarch)
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fbsd_init_abi (struct gdbarch_info info, struct gdbarch *gdbarch)
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{
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{
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set_gdbarch_core_pid_to_str (gdbarch, fbsd_core_pid_to_str);
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set_gdbarch_core_thread_name (gdbarch, fbsd_core_thread_name);
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set_gdbarch_make_corefile_notes (gdbarch, fbsd_make_corefile_notes);
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set_gdbarch_make_corefile_notes (gdbarch, fbsd_make_corefile_notes);
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}
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}
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