diff options
| -rw-r--r-- | gdb/ChangeLog | 26 | ||||
| -rw-r--r-- | gdb/fbsd-tdep.c | 135 | ||||
| -rw-r--r-- | gdb/gcore.c | 136 | ||||
| -rw-r--r-- | gdb/gcore.h | 20 | ||||
| -rw-r--r-- | gdb/linux-tdep.c | 141 |
5 files changed, 288 insertions, 170 deletions
diff --git a/gdb/ChangeLog b/gdb/ChangeLog index 5c66f99..220ef2a 100644 --- a/gdb/ChangeLog +++ b/gdb/ChangeLog @@ -1,3 +1,29 @@ +2021-02-09 Andrew Burgess <andrew.burgess@embecosm.com> + + * gcore.c (struct gcore_collect_regset_section_cb_data): Delete. + (gcore_collect_regset_section_cb): Delete. + (gcore_collect_thread_registers): Delete. + (gcore_build_thread_register_notes): Delete. + (gcore_find_signalled_thread): Delete. + * gcore.h: Remove 'gdbsupport/gdb_signals.h' include and delete + 'gdbarch' and 'thread_info' declarations. + (gcore_build_thread_register_notes): Delete declaration. + (gcore_find_signalled_thread): Likewise. + * fbsd-tdep.c: Remove 'gcore.h' include. + (struct fbsd_collect_regset_section_cb_data): New struct. + (fbsd_collect_regset_section_cb): New function. + (fbsd_collect_thread_registers): New function. + (struct fbsd_corefile_thread_data): New struct. + (fbsd_corefile_thread): New function. + (fbsd_make_corefile_notes): Call FreeBSD specific code. + * linux-tdep.c: Remove 'gcore.h' include. + (struct linux_collect_regset_section_cb_data): New struct. + (linux_collect_regset_section_cb): New function. + (linux_collect_thread_registers): New function. + (linux_corefile_thread): Call Linux specific code. + (find_signalled_thread): New function. + (linux_make_corefile_notes): Call find_signalled_thread. + 2021-02-09 Tom Tromey <tromey@adacore.com> * ada-lang.c (coerce_unspec_val_to_type): Avoid making lazy diff --git a/gdb/fbsd-tdep.c b/gdb/fbsd-tdep.c index edd3edc..cc51e92 100644 --- a/gdb/fbsd-tdep.c +++ b/gdb/fbsd-tdep.c @@ -32,7 +32,6 @@ #include "elf-bfd.h" #include "fbsd-tdep.h" -#include "gcore.h" /* This enum is derived from FreeBSD's <sys/signal.h>. */ @@ -584,6 +583,129 @@ find_signalled_thread (struct thread_info *info, void *data) return 0; } +/* Structure for passing information from + fbsd_collect_thread_registers via an iterator to + fbsd_collect_regset_section_cb. */ + +struct fbsd_collect_regset_section_cb_data +{ + fbsd_collect_regset_section_cb_data (const struct regcache *regcache, + bfd *obfd, + gdb::unique_xmalloc_ptr<char> ¬e_data, + int *note_size, + unsigned long lwp, + gdb_signal stop_signal) + : regcache (regcache), + obfd (obfd), + note_data (note_data), + note_size (note_size), + lwp (lwp), + stop_signal (stop_signal) + {} + + const struct regcache *regcache; + bfd *obfd; + gdb::unique_xmalloc_ptr<char> ¬e_data; + int *note_size; + unsigned long lwp; + enum gdb_signal stop_signal; + bool abort_iteration = false; +}; + +static void +fbsd_collect_regset_section_cb (const char *sect_name, int supply_size, + int collect_size, const struct regset *regset, + const char *human_name, void *cb_data) +{ + char *buf; + struct fbsd_collect_regset_section_cb_data *data + = (struct fbsd_collect_regset_section_cb_data *) cb_data; + + if (data->abort_iteration) + return; + + gdb_assert (regset->collect_regset); + + buf = (char *) xmalloc (collect_size); + regset->collect_regset (regset, data->regcache, -1, buf, collect_size); + + /* PRSTATUS still needs to be treated specially. */ + if (strcmp (sect_name, ".reg") == 0) + data->note_data.reset (elfcore_write_prstatus + (data->obfd, data->note_data.release (), + data->note_size, data->lwp, + gdb_signal_to_host (data->stop_signal), + buf)); + else + data->note_data.reset (elfcore_write_register_note + (data->obfd, data->note_data.release (), + data->note_size, sect_name, buf, + collect_size)); + xfree (buf); + + if (data->note_data == NULL) + data->abort_iteration = true; +} + +/* Records the thread's register state for the corefile note + section. */ + +static void +fbsd_collect_thread_registers (const struct regcache *regcache, + ptid_t ptid, bfd *obfd, + gdb::unique_xmalloc_ptr<char> ¬e_data, + int *note_size, + enum gdb_signal stop_signal) +{ + fbsd_collect_regset_section_cb_data data (regcache, obfd, note_data, + note_size, ptid.lwp (), + stop_signal); + + gdbarch_iterate_over_regset_sections (regcache->arch (), + fbsd_collect_regset_section_cb, + &data, regcache); +} + +struct fbsd_corefile_thread_data +{ + fbsd_corefile_thread_data (struct gdbarch *gdbarch, + bfd *obfd, + gdb::unique_xmalloc_ptr<char> ¬e_data, + int *note_size, + gdb_signal stop_signal) + : gdbarch (gdbarch), + obfd (obfd), + note_data (note_data), + note_size (note_size), + stop_signal (stop_signal) + {} + + struct gdbarch *gdbarch; + bfd *obfd; + gdb::unique_xmalloc_ptr<char> ¬e_data; + int *note_size; + enum gdb_signal stop_signal; +}; + +/* Records the thread's register state for the corefile note + section. */ + +static void +fbsd_corefile_thread (struct thread_info *info, + struct fbsd_corefile_thread_data *args) +{ + struct regcache *regcache; + + regcache = get_thread_arch_regcache (info->inf->process_target (), + info->ptid, args->gdbarch); + + target_fetch_registers (regcache, -1); + + fbsd_collect_thread_registers (regcache, info->ptid, args->obfd, + args->note_data, args->note_size, + args->stop_signal); +} + /* Return a byte_vector containing the contents of a core dump note for the target object of type OBJECT. If STRUCTSIZE is non-zero, the data is prefixed with a 32-bit integer size to match the format @@ -660,17 +782,16 @@ fbsd_make_corefile_notes (struct gdbarch *gdbarch, bfd *obfd, int *note_size) signalled_thr = curr_thr; } - gcore_build_thread_register_notes (gdbarch, signalled_thr, - signalled_thr->suspend.stop_signal, - obfd, ¬e_data, note_size); + fbsd_corefile_thread_data thread_args (gdbarch, obfd, note_data, note_size, + signalled_thr->suspend.stop_signal); + + fbsd_corefile_thread (signalled_thr, &thread_args); for (thread_info *thr : current_inferior ()->non_exited_threads ()) { if (thr == signalled_thr) continue; - gcore_build_thread_register_notes (gdbarch, thr, - signalled_thr->suspend.stop_signal, - obfd, ¬e_data, note_size); + fbsd_corefile_thread (thr, &thread_args); } /* Auxiliary vector. */ diff --git a/gdb/gcore.c b/gdb/gcore.c index d62aa3a..73ac6b0 100644 --- a/gdb/gcore.c +++ b/gdb/gcore.c @@ -579,142 +579,6 @@ gcore_memory_sections (bfd *obfd) return 1; } -/* Structure for passing information from GCORE_COLLECT_THREAD_REGISTERS - via an iterator to GCORE_COLLECT_REGSET_SECTION_CB. */ - -struct gcore_collect_regset_section_cb_data -{ - gcore_collect_regset_section_cb_data (struct gdbarch *gdbarch, - const struct regcache *regcache, - bfd *obfd, ptid_t ptid, - gdb_signal stop_signal, - gdb::unique_xmalloc_ptr<char> *note_data, - int *note_size) - - : gdbarch (gdbarch), regcache (regcache), obfd (obfd), - note_data (note_data), note_size (note_size), - stop_signal (stop_signal) - { - /* The LWP is often not available for bare metal target, in which case - use the tid instead. */ - if (ptid.lwp_p ()) - lwp = ptid.lwp (); - else - lwp = ptid.tid (); - } - - struct gdbarch *gdbarch; - const struct regcache *regcache; - bfd *obfd; - gdb::unique_xmalloc_ptr<char> *note_data; - int *note_size; - unsigned long lwp; - enum gdb_signal stop_signal; - bool abort_iteration = false; -}; - -/* Callback for ITERATE_OVER_REGSET_SECTIONS that records a single - regset in the core file note section. */ - -static void -gcore_collect_regset_section_cb (const char *sect_name, int supply_size, - int collect_size, - const struct regset *regset, - const char *human_name, void *cb_data) -{ - struct gcore_collect_regset_section_cb_data *data - = (struct gcore_collect_regset_section_cb_data *) cb_data; - bool variable_size_section = (regset != NULL - && regset->flags & REGSET_VARIABLE_SIZE); - - gdb_assert (variable_size_section || supply_size == collect_size); - - if (data->abort_iteration) - return; - - gdb_assert (regset != nullptr && regset->collect_regset != nullptr); - - /* This is intentionally zero-initialized by using std::vector, so - that any padding bytes in the core file will show as 0. */ - std::vector<gdb_byte> buf (collect_size); - - regset->collect_regset (regset, data->regcache, -1, buf.data (), - collect_size); - - /* PRSTATUS still needs to be treated specially. */ - if (strcmp (sect_name, ".reg") == 0) - data->note_data->reset (elfcore_write_prstatus - (data->obfd, data->note_data->release (), - data->note_size, data->lwp, - gdb_signal_to_host (data->stop_signal), - buf.data ())); - else - data->note_data->reset (elfcore_write_register_note - (data->obfd, data->note_data->release (), - data->note_size, sect_name, buf.data (), - collect_size)); - - if (data->note_data == nullptr) - data->abort_iteration = true; -} - -/* Records the register state of thread PTID out of REGCACHE into the note - buffer represented by *NOTE_DATA and NOTE_SIZE. OBFD is the bfd into - which the core file is being created, and STOP_SIGNAL is the signal that - cause thread PTID to stop. */ - -static void -gcore_collect_thread_registers (const struct regcache *regcache, - ptid_t ptid, bfd *obfd, - gdb::unique_xmalloc_ptr<char> *note_data, - int *note_size, - enum gdb_signal stop_signal) -{ - struct gdbarch *gdbarch = regcache->arch (); - gcore_collect_regset_section_cb_data data (gdbarch, regcache, obfd, ptid, - stop_signal, note_data, - note_size); - gdbarch_iterate_over_regset_sections (gdbarch, - gcore_collect_regset_section_cb, - &data, regcache); -} - -/* See gcore.h. */ - -void -gcore_build_thread_register_notes - (struct gdbarch *gdbarch, struct thread_info *info, gdb_signal stop_signal, - bfd *obfd, gdb::unique_xmalloc_ptr<char> *note_data, int *note_size) -{ - struct regcache *regcache - = get_thread_arch_regcache (info->inf->process_target (), - info->ptid, gdbarch); - target_fetch_registers (regcache, -1); - gcore_collect_thread_registers (regcache, info->ptid, obfd, note_data, - note_size, stop_signal); -} - -/* See gcore.h. */ - -thread_info * -gcore_find_signalled_thread () -{ - thread_info *curr_thr = inferior_thread (); - if (curr_thr->state != THREAD_EXITED - && curr_thr->suspend.stop_signal != GDB_SIGNAL_0) - return curr_thr; - - for (thread_info *thr : current_inferior ()->non_exited_threads ()) - if (thr->suspend.stop_signal != GDB_SIGNAL_0) - return thr; - - /* Default to the current thread, unless it has exited. */ - if (curr_thr->state != THREAD_EXITED) - return curr_thr; - - return nullptr; -} - void _initialize_gcore (); void _initialize_gcore () diff --git a/gdb/gcore.h b/gdb/gcore.h index ce60841..af37ff3 100644 --- a/gdb/gcore.h +++ b/gdb/gcore.h @@ -21,10 +21,6 @@ #define GCORE_H 1 #include "gdb_bfd.h" -#include "gdbsupport/gdb_signals.h" - -struct gdbarch; -struct thread_info; extern gdb_bfd_ref_ptr create_gcore_bfd (const char *filename); extern void write_gcore_file (bfd *obfd); @@ -32,20 +28,4 @@ extern int objfile_find_memory_regions (struct target_ops *self, find_memory_region_ftype func, void *obfd); -/* Add content to *NOTE_DATA (and update *NOTE_SIZE) to describe the - registers of thread INFO. Report the thread as having stopped with - STOP_SIGNAL. The core file is being written to OFD, and GDBARCH is the - architecture for which the core file is being generated. */ - -extern void gcore_build_thread_register_notes - (struct gdbarch *gdbarch, struct thread_info *info, gdb_signal stop_signal, - bfd *obfd, gdb::unique_xmalloc_ptr<char> *note_data, int *note_size); - -/* Find the signalled thread. In case there's more than one signalled - thread, prefer the current thread, if it is signalled. If no thread was - signalled, default to the current thread, unless it has exited, in which - case return NULL. */ - -extern thread_info *gcore_find_signalled_thread (); - #endif /* GCORE_H */ diff --git a/gdb/linux-tdep.c b/gdb/linux-tdep.c index 3db4d31..e9f8e1b 100644 --- a/gdb/linux-tdep.c +++ b/gdb/linux-tdep.c @@ -39,7 +39,6 @@ #include "gdb_regex.h" #include "gdbsupport/enum-flags.h" #include "gdbsupport/gdb_optional.h" -#include "gcore.h" #include <ctype.h> @@ -1598,6 +1597,104 @@ linux_make_mappings_corefile_notes (struct gdbarch *gdbarch, bfd *obfd, } } +/* Structure for passing information from + linux_collect_thread_registers via an iterator to + linux_collect_regset_section_cb. */ + +struct linux_collect_regset_section_cb_data +{ + linux_collect_regset_section_cb_data (struct gdbarch *gdbarch, + const struct regcache *regcache, + bfd *obfd, + gdb::unique_xmalloc_ptr<char> ¬e_data, + int *note_size, + unsigned long lwp, + gdb_signal stop_signal) + : gdbarch (gdbarch), regcache (regcache), obfd (obfd), + note_data (note_data), note_size (note_size), lwp (lwp), + stop_signal (stop_signal) + {} + + struct gdbarch *gdbarch; + const struct regcache *regcache; + bfd *obfd; + gdb::unique_xmalloc_ptr<char> ¬e_data; + int *note_size; + unsigned long lwp; + enum gdb_signal stop_signal; + bool abort_iteration = false; +}; + +/* Callback for iterate_over_regset_sections that records a single + regset in the corefile note section. */ + +static void +linux_collect_regset_section_cb (const char *sect_name, int supply_size, + int collect_size, const struct regset *regset, + const char *human_name, void *cb_data) +{ + struct linux_collect_regset_section_cb_data *data + = (struct linux_collect_regset_section_cb_data *) cb_data; + bool variable_size_section = (regset != NULL + && regset->flags & REGSET_VARIABLE_SIZE); + + if (!variable_size_section) + gdb_assert (supply_size == collect_size); + + if (data->abort_iteration) + return; + + gdb_assert (regset && regset->collect_regset); + + /* This is intentionally zero-initialized by using std::vector, so + that any padding bytes in the core file will show as 0. */ + std::vector<gdb_byte> buf (collect_size); + + regset->collect_regset (regset, data->regcache, -1, buf.data (), + collect_size); + + /* PRSTATUS still needs to be treated specially. */ + if (strcmp (sect_name, ".reg") == 0) + data->note_data.reset (elfcore_write_prstatus + (data->obfd, data->note_data.release (), + data->note_size, data->lwp, + gdb_signal_to_host (data->stop_signal), + buf.data ())); + else + data->note_data.reset (elfcore_write_register_note + (data->obfd, data->note_data.release (), + data->note_size, sect_name, buf.data (), + collect_size)); + + if (data->note_data == NULL) + data->abort_iteration = true; +} + +/* Records the thread's register state for the corefile note + section. */ + +static void +linux_collect_thread_registers (const struct regcache *regcache, + ptid_t ptid, bfd *obfd, + gdb::unique_xmalloc_ptr<char> ¬e_data, + int *note_size, + enum gdb_signal stop_signal) +{ + struct gdbarch *gdbarch = regcache->arch (); + + /* For remote targets the LWP may not be available, so use the TID. */ + long lwp = ptid.lwp (); + if (lwp == 0) + lwp = ptid.tid (); + + linux_collect_regset_section_cb_data data (gdbarch, regcache, obfd, note_data, + note_size, lwp, stop_signal); + + gdbarch_iterate_over_regset_sections (gdbarch, + linux_collect_regset_section_cb, + &data, regcache); +} + /* Fetch the siginfo data for the specified thread, if it exists. If there is no data, or we could not read it, return an empty buffer. */ @@ -1649,16 +1746,22 @@ static void linux_corefile_thread (struct thread_info *info, struct linux_corefile_thread_data *args) { - gcore_build_thread_register_notes (args->gdbarch, info, args->stop_signal, - args->obfd, &args->note_data, - args->note_size); + struct regcache *regcache; + + regcache = get_thread_arch_regcache (info->inf->process_target (), + info->ptid, args->gdbarch); + + target_fetch_registers (regcache, -1); + gdb::byte_vector siginfo_data = linux_get_siginfo_data (info, args->gdbarch); + + linux_collect_thread_registers (regcache, info->ptid, args->obfd, + args->note_data, args->note_size, + args->stop_signal); /* Don't return anything if we got no register information above, such a core file is useless. */ if (args->note_data != NULL) { - gdb::byte_vector siginfo_data - = linux_get_siginfo_data (info, args->gdbarch); if (!siginfo_data.empty ()) args->note_data.reset (elfcore_write_note (args->obfd, args->note_data.release (), @@ -1857,6 +1960,30 @@ linux_fill_prpsinfo (struct elf_internal_linux_prpsinfo *p) return 1; } +/* Find the signalled thread. In case there's more than one signalled + thread, prefer the current thread, if it is signalled. If no + thread was signalled, default to the current thread, unless it has + exited, in which case return NULL. */ + +static thread_info * +find_signalled_thread () +{ + thread_info *curr_thr = inferior_thread (); + if (curr_thr->state != THREAD_EXITED + && curr_thr->suspend.stop_signal != GDB_SIGNAL_0) + return curr_thr; + + for (thread_info *thr : current_inferior ()->non_exited_threads ()) + if (thr->suspend.stop_signal != GDB_SIGNAL_0) + return thr; + + /* Default to the current thread, unless it has exited. */ + if (curr_thr->state != THREAD_EXITED) + return curr_thr; + + return nullptr; +} + /* Build the note section for a corefile, and return it in a malloc buffer. */ @@ -1894,7 +2021,7 @@ linux_make_corefile_notes (struct gdbarch *gdbarch, bfd *obfd, int *note_size) /* Like the kernel, prefer dumping the signalled thread first. "First thread" is what tools use to infer the signalled thread. */ - thread_info *signalled_thr = gcore_find_signalled_thread (); + thread_info *signalled_thr = find_signalled_thread (); gdb_signal stop_signal; if (signalled_thr != nullptr) stop_signal = signalled_thr->suspend.stop_signal; |