From be4d1333163c056f725fbbb96b400ce3d22802a7 Mon Sep 17 00:00:00 2001 From: Michael Snyder Date: Wed, 9 Jan 2002 00:37:02 +0000 Subject: [PATCH] 2002-01-03 Michael Snyder Implement a "generate-core-file" command in gdb, save target state. * gcore.c: New file. Implement new command 'generate-core-file'. Save a corefile image of the current state of the inferior. * linux-proc.c: Add linux-specific code for saving corefiles. * target.h (struct target_ops): Add new target vectors for saving corefiles; to_find_memory_regions and to_make_corefile_notes. (target_find_memory_regions): New macro. (target_make_corefile_notes): New macro. * target.c (update_current_target): Inherit new target methods. (dummy_find_memory_regions): New place-holder method. (dummy_make_corefile_notes): New place-holder method. (init_dummy_target): Initialize new dummy target vectors. * exec.c (exec_set_find_memory_regions): New function. Allow the exec_ops vector for memory regions to be taken over. (exec_make_note_section): New function, target vector method. * defs.h (exec_set_find_memory_regions): Export prototype. * procfs.c (proc_find_memory_regions): New function, corefile method. (procfs_make_note_section): New function, corefile method. (init_procfs_ops): Set new target vector pointers. (find_memory_regions_callback): New function. (procfs_do_thread_registers): New function. (procfs_corefile_thread_callback): New function. * sol-thread.c (sol_find_memory_regions): New function. (sol_make_note_section): New function. (init_sol_thread_ops): Initialize new target vectors. * inftarg.c (inftarg_set_find_memory_regions): New function. Allow to_find_memory_regions vector to be taken over. (inftarg_set_make_corefile_notes): New function. Allow to_make_corefile_notes vector to be taken over. * thread-db.c (thread_db_new_objfile): Don't activate thread-db interface layer if not target_has_execution (may be a corefile). * config/i386/linux.mh: Add gcore.o to NATDEPFILES. * config/sparc/sun4sol2.mh: Ditto. * config/alpha/alpha-linux.mh: Ditto. * config/arm/linux.mh: Ditto. * config/i386/x86-64linux.mh: Ditto. * config/ia64/linux.mh: Ditto. * config/m68k/linux.mh: Ditto. * config/mips/linux.mh: Ditto. * config/powerpc/linux.mh: Ditto. * config/sparc/linux.mh: Ditto. --- gdb/ChangeLog | 44 +++ gdb/config/alpha/alpha-linux.mh | 2 +- gdb/config/arm/linux.mh | 2 +- gdb/config/i386/linux.mh | 2 +- gdb/config/i386/x86-64linux.mh | 3 +- gdb/config/ia64/linux.mh | 2 +- gdb/config/m68k/linux.mh | 2 +- gdb/config/mips/linux.mh | 2 +- gdb/config/powerpc/linux.mh | 3 +- gdb/config/sparc/linux.mh | 3 +- gdb/config/sparc/sun4sol2.mh | 3 +- gdb/defs.h | 9 +- gdb/exec.c | 50 +++- gdb/gcore.c | 493 ++++++++++++++++++++++++++++++++ gdb/inftarg.c | 21 +- gdb/linux-proc.c | 243 +++++++++++++++- gdb/procfs.c | 255 ++++++++++++++--- gdb/sol-thread.c | 20 +- gdb/target.c | 23 +- gdb/target.h | 25 +- 20 files changed, 1148 insertions(+), 59 deletions(-) create mode 100644 gdb/gcore.c diff --git a/gdb/ChangeLog b/gdb/ChangeLog index ae1bbae263e..49eac086f71 100644 --- a/gdb/ChangeLog +++ b/gdb/ChangeLog @@ -1,3 +1,47 @@ +2002-01-03 Michael Snyder + + Implement a "generate-core-file" command in gdb, save target state. + * gcore.c: New file. Implement new command 'generate-core-file'. + Save a corefile image of the current state of the inferior. + * linux-proc.c: Add linux-specific code for saving corefiles. + * target.h (struct target_ops): Add new target vectors for saving + corefiles; to_find_memory_regions and to_make_corefile_notes. + (target_find_memory_regions): New macro. + (target_make_corefile_notes): New macro. + * target.c (update_current_target): Inherit new target methods. + (dummy_find_memory_regions): New place-holder method. + (dummy_make_corefile_notes): New place-holder method. + (init_dummy_target): Initialize new dummy target vectors. + * exec.c (exec_set_find_memory_regions): New function. + Allow the exec_ops vector for memory regions to be taken over. + (exec_make_note_section): New function, target vector method. + * defs.h (exec_set_find_memory_regions): Export prototype. + * procfs.c (proc_find_memory_regions): New function, corefile method. + (procfs_make_note_section): New function, corefile method. + (init_procfs_ops): Set new target vector pointers. + (find_memory_regions_callback): New function. + (procfs_do_thread_registers): New function. + (procfs_corefile_thread_callback): New function. + * sol-thread.c (sol_find_memory_regions): New function. + (sol_make_note_section): New function. + (init_sol_thread_ops): Initialize new target vectors. + * inftarg.c (inftarg_set_find_memory_regions): New function. + Allow to_find_memory_regions vector to be taken over. + (inftarg_set_make_corefile_notes): New function. + Allow to_make_corefile_notes vector to be taken over. + * thread-db.c (thread_db_new_objfile): Don't activate thread-db + interface layer if not target_has_execution (may be a corefile). + * config/i386/linux.mh: Add gcore.o to NATDEPFILES. + * config/sparc/sun4sol2.mh: Ditto. + * config/alpha/alpha-linux.mh: Ditto. + * config/arm/linux.mh: Ditto. + * config/i386/x86-64linux.mh: Ditto. + * config/ia64/linux.mh: Ditto. + * config/m68k/linux.mh: Ditto. + * config/mips/linux.mh: Ditto. + * config/powerpc/linux.mh: Ditto. + * config/sparc/linux.mh: Ditto. + 2002-01-07 Michael Snyder * arm-linux-nat.c: Remove references to regcache.c internal data diff --git a/gdb/config/alpha/alpha-linux.mh b/gdb/config/alpha/alpha-linux.mh index 0fe3c48dc35..1aad9446c29 100644 --- a/gdb/config/alpha/alpha-linux.mh +++ b/gdb/config/alpha/alpha-linux.mh @@ -3,7 +3,7 @@ XDEPFILES= XM_FILE= xm-alphalinux.h NAT_FILE= nm-linux.h NATDEPFILES= infptrace.o inftarg.o corelow.o alpha-nat.o linux-proc.o \ - fork-child.o proc-service.o thread-db.o lin-lwp.o + fork-child.o proc-service.o thread-db.o lin-lwp.o gcore.o LOADLIBES = -ldl -rdynamic diff --git a/gdb/config/arm/linux.mh b/gdb/config/arm/linux.mh index 8b386fb1708..8c9f530b98f 100644 --- a/gdb/config/arm/linux.mh +++ b/gdb/config/arm/linux.mh @@ -5,7 +5,7 @@ XDEPFILES= NAT_FILE= nm-linux.h NATDEPFILES= infptrace.o inftarg.o fork-child.o corelow.o \ - core-regset.o arm-linux-nat.o linux-proc.o \ + core-regset.o arm-linux-nat.o linux-proc.o gcore.o \ proc-service.o thread-db.o lin-lwp.o LOADLIBES= -ldl -rdynamic diff --git a/gdb/config/i386/linux.mh b/gdb/config/i386/linux.mh index 50d24458229..e3fb5ed9730 100644 --- a/gdb/config/i386/linux.mh +++ b/gdb/config/i386/linux.mh @@ -6,7 +6,7 @@ XDEPFILES= NAT_FILE= nm-linux.h NATDEPFILES= infptrace.o inftarg.o fork-child.o corelow.o linux-proc.o \ core-aout.o i386-nat.o i386-linux-nat.o i387-nat.o \ - proc-service.o thread-db.o lin-lwp.o linux-proc.o + proc-service.o thread-db.o lin-lwp.o linux-proc.o gcore.o # The dynamically loaded libthread_db needs access to symbols in the # gdb executable. diff --git a/gdb/config/i386/x86-64linux.mh b/gdb/config/i386/x86-64linux.mh index f9f31fcdf0d..d6a8a70d9dd 100644 --- a/gdb/config/i386/x86-64linux.mh +++ b/gdb/config/i386/x86-64linux.mh @@ -6,6 +6,7 @@ XDEPFILES= NAT_FILE= nm-x86-64.h NATDEPFILES= infptrace.o inftarg.o fork-child.o corelow.o \ core-aout.o i386-nat.o x86-64-nat.o x86-64-linux-nat.o \ - i387-nat.o proc-service.o thread-db.o lin-lwp.o linux-proc.o + i387-nat.o proc-service.o thread-db.o lin-lwp.o \ + linux-proc.o gcore.o LOADLIBES = -ldl -rdynamic diff --git a/gdb/config/ia64/linux.mh b/gdb/config/ia64/linux.mh index 48268d731e3..5be42706f22 100644 --- a/gdb/config/ia64/linux.mh +++ b/gdb/config/ia64/linux.mh @@ -4,7 +4,7 @@ XM_FILE= xm-linux.h XDEPFILES= NAT_FILE= nm-linux.h -NATDEPFILES= infptrace.o inftarg.o fork-child.o corelow.o \ +NATDEPFILES= infptrace.o inftarg.o fork-child.o corelow.o gcore.o \ core-aout.o core-regset.o ia64-linux-nat.o linux-proc.o \ proc-service.o thread-db.o lin-lwp.o diff --git a/gdb/config/m68k/linux.mh b/gdb/config/m68k/linux.mh index aa5121b737b..e8ea7652244 100644 --- a/gdb/config/m68k/linux.mh +++ b/gdb/config/m68k/linux.mh @@ -5,7 +5,7 @@ XDEPFILES= NAT_FILE= nm-linux.h NATDEPFILES= infptrace.o inftarg.o fork-child.o \ - corelow.o core-aout.o m68klinux-nat.o linux-proc.o \ + corelow.o core-aout.o m68klinux-nat.o linux-proc.o gcore.o \ proc-service.o thread-db.o lin-lwp.o # The dynamically loaded libthread_db needs access to symbols in the diff --git a/gdb/config/mips/linux.mh b/gdb/config/mips/linux.mh index 47ad1eec9d1..eb3ec149684 100644 --- a/gdb/config/mips/linux.mh +++ b/gdb/config/mips/linux.mh @@ -3,6 +3,6 @@ XDEPFILES= XM_FILE= xm-linux.h NAT_FILE= nm-linux.h NATDEPFILES= infptrace.o inftarg.o fork-child.o mips-linux-nat.o \ - thread-db.o lin-lwp.o proc-service.o linux-proc.o + thread-db.o lin-lwp.o proc-service.o linux-proc.o gcore.o LOADLIBES = -ldl -rdynamic diff --git a/gdb/config/powerpc/linux.mh b/gdb/config/powerpc/linux.mh index 7f04a48b3d2..e49f700912f 100644 --- a/gdb/config/powerpc/linux.mh +++ b/gdb/config/powerpc/linux.mh @@ -6,7 +6,8 @@ XM_CLIBS= NAT_FILE= nm-linux.h NATDEPFILES= infptrace.o inftarg.o fork-child.o corelow.o linux-proc.o \ -core-regset.o ppc-linux-nat.o proc-service.o thread-db.o lin-lwp.o + core-regset.o ppc-linux-nat.o proc-service.o thread-db.o lin-lwp.o \ + gcore.o LOADLIBES = -ldl -rdynamic diff --git a/gdb/config/sparc/linux.mh b/gdb/config/sparc/linux.mh index e63b2e604e5..30a97a698ff 100644 --- a/gdb/config/sparc/linux.mh +++ b/gdb/config/sparc/linux.mh @@ -5,7 +5,8 @@ XDEPFILES= NAT_FILE= nm-linux.h NATDEPFILES= fork-child.o infptrace.o inftarg.o corelow.o sparc-nat.o \ - proc-service.o thread-db.o lin-lwp.o sparc-linux-nat.o linux-proc.o + proc-service.o thread-db.o lin-lwp.o sparc-linux-nat.o \ + linux-proc.o gcore.o # The dynamically loaded libthread_db needs access to symbols in the # gdb executable. diff --git a/gdb/config/sparc/sun4sol2.mh b/gdb/config/sparc/sun4sol2.mh index 8063e1698a4..edcef48358c 100644 --- a/gdb/config/sparc/sun4sol2.mh +++ b/gdb/config/sparc/sun4sol2.mh @@ -6,7 +6,8 @@ XM_CLIBS= -lsocket -lnsl NAT_FILE= nm-sun4sol2.h NATDEPFILES= corelow.o core-sol2.o solib.o solib-svr4.o solib-legacy.o \ - fork-child.o procfs.o proc-api.o proc-events.o proc-flags.o proc-why.o + fork-child.o procfs.o gcore.o \ + proc-api.o proc-events.o proc-flags.o proc-why.o # /usr/include/v9 is needed only by core-sol2.c when including # v9/sys/privregs.h, or rather the headers it in turn includes. diff --git a/gdb/defs.h b/gdb/defs.h index 461ab314e4f..9957aa19fc6 100644 --- a/gdb/defs.h +++ b/gdb/defs.h @@ -1,7 +1,7 @@ /* *INDENT-OFF* */ /* ATTR_FORMAT confuses indent, avoid running it for now */ /* Basic, host-specific, and target-specific definitions for GDB. Copyright 1986, 1988, 1989, 1990, 1991, 1992, 1993, 1994, 1995, 1996, - 1997, 1998, 1999, 2000, 2001 + 1997, 1998, 1999, 2000, 2001, 2002 Free Software Foundation, Inc. This file is part of GDB. @@ -775,6 +775,13 @@ extern void exec_set_section_offsets (bfd_signed_vma text_off, bfd_signed_vma data_off, bfd_signed_vma bss_off); +/* Take over the 'find_mapped_memory' vector from exec.c. */ +extern void exec_set_find_memory_regions (int (*) (int (*) (CORE_ADDR, + unsigned long, + int, int, int, + void *), + void *)); + /* From findvar.c */ extern int read_relative_register_raw_bytes (int, char *); diff --git a/gdb/exec.c b/gdb/exec.c index 6e4e85b4a12..404617e0116 100644 --- a/gdb/exec.c +++ b/gdb/exec.c @@ -1,6 +1,6 @@ /* Work with executable files, for GDB. Copyright 1988, 1989, 1990, 1991, 1992, 1993, 1994, 1995, 1996, 1997, - 1998, 1999, 2000, 2001 + 1998, 1999, 2000, 2001, 2002 Free Software Foundation, Inc. This file is part of GDB. @@ -685,10 +685,24 @@ ignore (CORE_ADDR addr, char *contents) return 0; } +/* Find mapped memory. */ + +extern void +exec_set_find_memory_regions (int (*func) (int (*) (CORE_ADDR, + unsigned long, + int, int, int, + void *), + void *)) +{ + exec_ops.to_find_memory_regions = func; +} + +static char *exec_make_note_section (bfd *, int *); + /* Fill in the exec file target vector. Very few entries need to be defined. */ -void +static void init_exec_ops (void) { exec_ops.to_shortname = "exec"; @@ -708,6 +722,7 @@ Specify the filename of the executable file."; exec_ops.to_clone_and_follow_inferior = find_default_clone_and_follow_inferior; exec_ops.to_stratum = file_stratum; exec_ops.to_has_memory = 1; + exec_ops.to_make_corefile_notes = exec_make_note_section; exec_ops.to_magic = OPS_MAGIC; } @@ -752,3 +767,34 @@ file itself are wrong. Each section must be changed separately. The\n\ add_target (&exec_ops); } + +static char * +exec_make_note_section (bfd *obfd, int *note_size) +{ + struct cleanup *old_chain; + char fname[16] = {'\0'}; + char psargs[80] = {'\0'}; + char *note_data = NULL; + + if (get_exec_file (0)) + { + strncpy (fname, strrchr (get_exec_file (0), '/') + 1, sizeof (fname)); + strncpy (psargs, get_exec_file (0), + sizeof (psargs)); + if (get_inferior_args ()) + { + strncat (psargs, " ", + sizeof (psargs) - strlen (psargs)); + strncat (psargs, get_inferior_args (), + sizeof (psargs) - strlen (psargs)); + } + + note_data = (char *) elfcore_write_prpsinfo (obfd, + note_data, + note_size, + fname, + psargs); + make_cleanup (xfree, note_data); + } + return note_data; +} diff --git a/gdb/gcore.c b/gdb/gcore.c new file mode 100644 index 00000000000..48ed6a3b594 --- /dev/null +++ b/gdb/gcore.c @@ -0,0 +1,493 @@ +/* Generate a core file for the inferior process. + Copyright 2001, 2002 Free Software Foundation, Inc. + + This file is part of GDB. + + This program 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 2 of the License, or + (at your option) any later version. + + This program 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, write to the Free Software + Foundation, Inc., 59 Temple Place - Suite 330, + Boston, MA 02111-1307, USA. */ + +#include "defs.h" +#include "command.h" +#include "inferior.h" +#include "gdbcore.h" +#include "elf-bfd.h" +#include +#include "symfile.h" +#include "objfiles.h" + +static char *default_gcore_target (void); +static enum bfd_architecture default_gcore_arch (void); +static unsigned long default_gcore_mach (void); +static int gcore_memory_sections (bfd *); + +/* Function: gcore_command + Generate a core file from the inferior process. */ + +static void +gcore_command (char *args, int from_tty) +{ + struct cleanup *old_chain; + char *corefilename, corefilename_buffer[40]; + asection *note_sec; + bfd *obfd; + void *note_data = NULL; + int note_size = 0; + + /* No use generating a corefile without a target process. */ + if (!(target_has_execution)) + noprocess (); + + if (args && *args) + corefilename = args; + else + { + /* Default corefile name is "core.PID". */ + sprintf (corefilename_buffer, "core.%d", PIDGET (inferior_ptid)); + corefilename = corefilename_buffer; + } + + if (info_verbose) + fprintf_filtered (gdb_stdout, + "Opening corefile '%s' for output.\n", corefilename); + + /* Open the output file. */ + if (!(obfd = bfd_openw (corefilename, NULL /*default_gcore_target ()*/))) + { + error ("Failed to open '%s' for output.", corefilename); + } + + /* Need a cleanup that will close the file (FIXME: delete it?). */ + old_chain = make_cleanup_bfd_close (obfd); + + bfd_set_format (obfd, bfd_core); + bfd_set_arch_mach (obfd, default_gcore_arch (), default_gcore_mach ()); + + /* An external target method must build the notes section. */ + note_data = (char *) target_make_corefile_notes (obfd, ¬e_size); + + /* Create the note section. */ + if (note_data != NULL && note_size != 0) + { + if ((note_sec = bfd_make_section_anyway (obfd, "note0")) == NULL) + error ("Failed to create 'note' section for corefile: %s", + bfd_errmsg (bfd_get_error ())); + + bfd_set_section_vma (obfd, note_sec, 0); + bfd_set_section_flags (obfd, note_sec, + SEC_HAS_CONTENTS | SEC_READONLY | SEC_ALLOC); + bfd_set_section_alignment (obfd, note_sec, 0); + bfd_set_section_size (obfd, note_sec, note_size); + } + + /* Now create the memory/load sections. */ + if (gcore_memory_sections (obfd) == 0) + error ("gcore: failed to get corefile memory sections from target."); + + /* Write out the contents of the note section. */ + if (note_data != NULL && note_size != 0) + { + if (!bfd_set_section_contents (obfd, note_sec, note_data, 0, note_size)) + { + warning ("writing note section (%s)", + bfd_errmsg (bfd_get_error ())); + } + } + + /* Succeeded. */ + fprintf_filtered (gdb_stdout, + "Saved corefile %s\n", corefilename); + + /* Clean-ups will close the output file and free malloc memory. */ + do_cleanups (old_chain); + return; +} + +static unsigned long +default_gcore_mach (void) +{ +#ifdef TARGET_ARCHITECTURE + const struct bfd_arch_info * bfdarch = TARGET_ARCHITECTURE; + + if (bfdarch != NULL) + return bfdarch->mach; +#endif + if (exec_bfd == NULL) + error ("Can't find default bfd machine type (need execfile)."); + + return bfd_get_mach (exec_bfd); +} + +static enum bfd_architecture +default_gcore_arch (void) +{ +#ifdef TARGET_ARCHITECTURE + const struct bfd_arch_info * bfdarch = TARGET_ARCHITECTURE; + + if (bfdarch != NULL) + return bfdarch->arch; +#endif + if (exec_bfd == NULL) + error ("Can't find bfd architecture for corefile (need execfile)."); + + return bfd_get_arch (exec_bfd); +} + +static char * +default_gcore_target (void) +{ + /* FIXME -- this may only work for ELF targets. */ + if (exec_bfd == NULL) + error ("Can't find default bfd target for corefile (need execfile)."); + + return bfd_get_target (exec_bfd); +} + +/* + * Default method for stack segment (preemptable by target). + */ + +static int (*override_derive_stack_segment) (bfd_vma *, bfd_vma *); + +extern void +preempt_derive_stack_segment (int (*override_func) (bfd_vma *, bfd_vma *)) +{ + override_derive_stack_segment = override_func; +} + +/* Function: default_derive_stack_segment + Derive a reasonable stack segment by unwinding the target stack. + + Returns 0 for failure, 1 for success. */ + +static int +default_derive_stack_segment (bfd_vma *bottom, bfd_vma *top) +{ + bfd_vma tmp_vma; + struct frame_info *fi, *tmp_fi; + + if (bottom == NULL || top == NULL) + return 0; /* Paranoia. */ + + if (!target_has_stack || !target_has_registers) + return 0; /* Can't succeed without stack and registers. */ + + if ((fi = get_current_frame ()) == NULL) + return 0; /* Can't succeed without current frame. */ + + /* Save frame pointer of TOS frame. */ + *top = fi->frame; + /* If current stack pointer is more "inner", use that instead. */ + if (INNER_THAN (read_sp (), *top)) + *top = read_sp (); + + /* Find prev-most frame. */ + while ((tmp_fi = get_prev_frame (fi)) != NULL) + fi = tmp_fi; + + /* Save frame pointer of prev-most frame. */ + *bottom = fi->frame; + + /* Now canonicalize their order, so that 'bottom' is a lower address + (as opposed to a lower stack frame). */ + if (*bottom > *top) + { + tmp_vma = *top; + *top = *bottom; + *bottom = tmp_vma; + } + + return 1; /* success */ +} + +static int +derive_stack_segment (bfd_vma *bottom, bfd_vma *top) +{ + if (override_derive_stack_segment) + return override_derive_stack_segment (bottom, top); + else + return default_derive_stack_segment (bottom, top); +} + +/* + * Default method for heap segment (preemptable by target). + */ + +static int (*override_derive_heap_segment) (bfd *, bfd_vma *, bfd_vma *); + +extern void +preempt_derive_heap_segment (int (*override_func) (bfd *, + bfd_vma *, bfd_vma *)) +{ + override_derive_heap_segment = override_func; +} + +/* Function: default_derive_heap_segment + Derive a reasonable heap segment by looking at sbrk and + the static data sections. + + Returns 0 for failure, 1 for success. */ + +static int +default_derive_heap_segment (bfd *abfd, bfd_vma *bottom, bfd_vma *top) +{ + bfd_vma top_of_data_memory = 0; + bfd_vma top_of_heap = 0; + bfd_size_type sec_size; + struct value *zero, *sbrk; + bfd_vma sec_vaddr; + asection *sec; + + if (bottom == NULL || top == NULL) + return 0; /* Paranoia. */ + + if (!target_has_execution) + return 0; /* This function depends on being able + to call a function in the inferior. */ + + /* Assumption: link map is arranged as follows (low to high addresses): + text sections + data sections (including bss) + heap + */ + + for (sec = abfd->sections; sec; sec = sec->next) + { + if (bfd_get_section_flags (abfd, sec) & SEC_DATA || + strcmp (".bss", bfd_get_section_name (abfd, sec)) == 0) + { + sec_vaddr = bfd_get_section_vma (abfd, sec); + sec_size = bfd_get_section_size_before_reloc (sec); + if (sec_vaddr + sec_size > top_of_data_memory) + top_of_data_memory = sec_vaddr + sec_size; + } + } + /* Now get the top-of-heap by calling sbrk in the inferior. */ + if ((sbrk = find_function_in_inferior ("sbrk")) == NULL) + return 0; + if ((zero = value_from_longest (builtin_type_int, (LONGEST) 0)) == NULL) + return 0; + if ((sbrk = call_function_by_hand (sbrk, 1, &zero)) == NULL) + return 0; + top_of_heap = value_as_long (sbrk); + + /* Return results. */ + if (top_of_heap > top_of_data_memory) + { + *bottom = top_of_data_memory; + *top = top_of_heap; + return 1; /* success */ + } + else + return 0; /* No additional heap space needs to be saved. */ +} + +static int +derive_heap_segment (bfd *abfd, bfd_vma *bottom, bfd_vma *top) +{ + if (override_derive_heap_segment) + return override_derive_heap_segment (abfd, bottom, top); + else + return default_derive_heap_segment (abfd, bottom, top); +} + +/* ARGSUSED */ +static void +make_output_phdrs (bfd *obfd, asection *osec, void *ignored) +{ + int p_flags = 0; + int p_type; + + /* FIXME: these constants may only be applicable for ELF. */ + if (strncmp (osec->name, "load", 4) == 0) + p_type = PT_LOAD; + else + p_type = PT_NOTE; + + p_flags |= PF_R; /* Segment is readable. */ + if (!(bfd_get_section_flags (obfd, osec) & SEC_READONLY)) + p_flags |= PF_W; /* Segment is writable. */ + if (bfd_get_section_flags (obfd, osec) & SEC_CODE) + p_flags |= PF_X; /* Segment is executable. */ + + bfd_record_phdr (obfd, p_type, 1, p_flags, 0, 0, + 0, 0, 1, &osec); +} + +static asection * +make_mem_sec (bfd *obfd, + bfd_vma addr, + bfd_size_type size, + unsigned int flags, + unsigned int alignment) +{ + asection *osec; + + if ((osec = bfd_make_section_anyway (obfd, "load")) == NULL) + { + warning ("Couldn't make gcore segment: %s", + bfd_errmsg (bfd_get_error ())); + return NULL; + } + + if (info_verbose) + { + fprintf_filtered (gdb_stdout, + "Save segment, %ld bytes at 0x%s\n", + size, paddr_nz (addr)); + } + + bfd_set_section_size (obfd, osec, size); + bfd_set_section_vma (obfd, osec, addr); + osec->lma = 0; /* FIXME: there should be a macro for this! */ + bfd_set_section_alignment (obfd, osec, alignment); + bfd_set_section_flags (obfd, osec, + flags | SEC_LOAD | SEC_ALLOC | SEC_HAS_CONTENTS); + return osec; +} + +static int +gcore_create_callback (CORE_ADDR vaddr, + unsigned long size, + int read, int write, int exec, + void *data) +{ + flagword flags = 0; + + if (write == 0) + { + flags |= SEC_READONLY; + /* Set size == zero for readonly sections. */ + size = 0; + } + if (exec) + { + flags |= SEC_CODE; + } + else + { + flags |= SEC_DATA; + } + + return ((make_mem_sec ((bfd *) data, vaddr, size, flags, 0)) == NULL); +} + +static int +objfile_find_memory_regions (int (*func) (CORE_ADDR, + unsigned long, + int, int, int, + void *), + void *obfd) +{ + /* Use objfile data to create memory sections. */ + struct objfile *objfile; + struct obj_section *objsec; + bfd_vma temp_bottom, temp_top; + + /* Call callback function for each objfile section. */ + ALL_OBJSECTIONS (objfile, objsec) + { + bfd *ibfd = objfile->obfd; + asection *isec = objsec->the_bfd_section; + flagword flags = bfd_get_section_flags (ibfd, isec); + int ret; + + if ((flags & SEC_ALLOC) || (flags & SEC_LOAD)) + { + int size = bfd_section_size (ibfd, isec); + int ret; + + if ((ret = (*func) (objsec->addr, + bfd_section_size (ibfd, isec), + 1, /* All sections will be readable. */ + (flags & SEC_READONLY) == 0, /* writable */ + (flags & SEC_CODE) != 0, /* executable */ + obfd)) != 0) + return ret; + } + } + + /* Make a stack segment. */ + if (derive_stack_segment (&temp_bottom, &temp_top)) + (*func) (temp_bottom, + temp_top - temp_bottom, + 1, /* Stack section will be readable */ + 1, /* Stack section will be writable */ + 0, /* Stack section will not be executable */ + obfd); + + /* Make a heap segment. */ + if (derive_heap_segment (exec_bfd, &temp_bottom, &temp_top)) + (*func) (temp_bottom, + temp_top - temp_bottom, + 1, /* Heap section will be readable */ + 1, /* Heap section will be writable */ + 0, /* Heap section will not be executable */ + obfd); + return 0; +} + +static void +gcore_copy_callback (bfd *obfd, asection *osec, void *ignored) +{ + bfd_size_type size = bfd_section_size (obfd, osec); + struct cleanup *old_chain = NULL; + void *memhunk; + + if (size == 0) + return; /* Read-only sections are marked as zero-size. + We don't have to copy their contents. */ + if (strncmp ("load", bfd_get_section_name (obfd, osec), 4) != 0) + return; /* Only interested in "load" sections. */ + + if ((memhunk = xmalloc (size)) == NULL) + error ("Not enough memory to create corefile."); + old_chain = make_cleanup (xfree, memhunk); + + if (target_read_memory (bfd_section_vma (obfd, osec), + memhunk, size) != 0) + warning ("Memory read failed for corefile section, %ld bytes at 0x%s\n", + (long) size, paddr (bfd_section_vma (obfd, osec))); + if (!bfd_set_section_contents (obfd, osec, memhunk, 0, size)) + warning ("Failed to write corefile contents (%s).", + bfd_errmsg (bfd_get_error ())); + + do_cleanups (old_chain); /* frees the xmalloc buffer */ +} + +static int +gcore_memory_sections (bfd *obfd) +{ + if (target_find_memory_regions (gcore_create_callback, obfd) != 0) + return 0; /* FIXME error return/msg? */ + + /* Record phdrs for section-to-segment mapping. */ + bfd_map_over_sections (obfd, make_output_phdrs, NULL); + + /* Copy memory region contents. */ + bfd_map_over_sections (obfd, gcore_copy_callback, NULL); + + return 1; /* success */ +} + +void +_initialize_gcore (void) +{ + add_com ("generate-core-file", class_files, gcore_command, + "Save a core file with the current state of the debugged process.\n\ +Argument is optional filename. Default filename is 'core.'."); + + add_com_alias ("gcore", "generate-core-file", class_files, 1); + exec_set_find_memory_regions (objfile_find_memory_regions); +} diff --git a/gdb/inftarg.c b/gdb/inftarg.c index 6b370304da4..9035310c494 100644 --- a/gdb/inftarg.c +++ b/gdb/inftarg.c @@ -1,5 +1,6 @@ /* Target-vector operations for controlling Unix child processes, for GDB. - Copyright 1990, 1991, 1992, 1993, 1994, 1995, 1996, 1998, 1999, 2000 + Copyright 1990, 1991, 1992, 1993, 1994, 1995, 1996, 1998, 1999, + 2000, 2002 Free Software Foundation, Inc. Contributed by Cygnus Support. @@ -812,6 +813,24 @@ init_child_ops (void) child_ops.to_magic = OPS_MAGIC; } +/* Take over the 'find_mapped_memory' vector from inftarg.c. */ +extern void +inftarg_set_find_memory_regions (int (*func) (int (*) (CORE_ADDR, + unsigned long, + int, int, int, + void *), + void *)) +{ + child_ops.to_find_memory_regions = func; +} + +/* Take over the 'make_corefile_notes' vector from inftarg.c. */ +extern void +inftarg_set_make_corefile_notes (char * (*func) (bfd *, int *)) +{ + child_ops.to_make_corefile_notes = func; +} + void _initialize_inftarg (void) { diff --git a/gdb/linux-proc.c b/gdb/linux-proc.c index 4e259230f93..4d48b8d16ea 100644 --- a/gdb/linux-proc.c +++ b/gdb/linux-proc.c @@ -1,5 +1,5 @@ -/* Generate a core file for the inferior process -- Linux version. - Copyright 2001 Free Software Foundation, Inc. +/* Linux-specific methods for using the /proc file system. + Copyright 2001, 2002 Free Software Foundation, Inc. This file is part of GDB. @@ -19,7 +19,20 @@ Boston, MA 02111-1307, USA. */ #include "defs.h" +#include "inferior.h" #include /* for MAXPATHLEN */ +#include +#include "gregset.h" /* for gregset */ +#include "gdbcore.h" /* for get_exec_file */ +#include "gdbthread.h" /* for struct thread_info etc. */ +#include "elf-bfd.h" + +/* Function: child_pid_to_exec_file + * + * Accepts an integer pid + * Returns a string representing a file that can be opened + * to get the symbols for the child process. + */ char * child_pid_to_exec_file (int pid) @@ -30,3 +43,229 @@ child_pid_to_exec_file (int pid) /* FIXME use readlink to get the real name. */ return fname; } + +/* Function: linux_find_memory_regions + * + * Fills the "to_find_memory_regions" target vector. + * Lists the memory regions in the inferior for a corefile. + */ + +static int +linux_find_memory_regions (int (*func) (CORE_ADDR, + unsigned long, + int, int, int, + void *), + void *obfd) +{ + long long pid = PIDGET (inferior_ptid); + char procfilename[MAXPATHLEN]; + FILE *procfile; + long long addr, endaddr, size, offset, inode; + char perms[8], dev[8], filename[MAXPATHLEN]; + int read, write, exec; + int ret; + + /* Compose the filename for the /proc memory map, and open it. */ + sprintf (procfilename, "/proc/%lld/maps", pid); + if ((procfile = fopen (procfilename, "r")) == NULL) + error ("Could not open %s\n", procfilename); + + if (info_verbose) + fprintf_filtered (gdb_stdout, + "Reading memory regions from %s\n", procfilename); + + /* Read the first memory segment descriptor from the maps file. */ + ret = fscanf (procfile, "%llx-%llx %s %llx %s %llx", + &addr, &endaddr, perms, &offset, dev, &inode); + if (inode) + fscanf (procfile, " %s\n", filename); + else + { + filename[0] = '\0'; + fscanf (procfile, "\n"); + } + + /* Now iterate until end-of-file. */ + while (ret > 0 && ret != EOF) + { + size = endaddr - addr; + + /* Get the segment's permissions. */ + read = (strchr (perms, 'r') != 0); + write = (strchr (perms, 'w') != 0); + exec = (strchr (perms, 'x') != 0); + + if (info_verbose) + { + fprintf_filtered (gdb_stdout, + "Save segment, %lld bytes at 0x%s (%c%c%c)", + size, paddr_nz (addr), + read ? 'r' : ' ', + write ? 'w' : ' ', + exec ? 'x' : ' '); + if (filename && filename[0]) + fprintf_filtered (gdb_stdout, + " for %s", filename); + fprintf_filtered (gdb_stdout, "\n"); + } + + /* Invoke the callback function to create the corefile segment. */ + func (addr, size, read, write, exec, obfd); + + /* Read the next memory region. */ + filename[0] = '\0'; + ret = fscanf (procfile, "%llx-%llx %s %llx %s %llx", + &addr, &endaddr, perms, &offset, dev, &inode); + if (inode) + fscanf (procfile, " %s\n", filename); + else + { + filename[0] = '\0'; + fscanf (procfile, "\n"); + } + } + + fclose (procfile); + return 0; +} + +/* Function: linux_do_thread_registers + * + * Records the thread's register state for the corefile note section. + */ + +static char * +linux_do_thread_registers (bfd *obfd, ptid_t ptid, + char *note_data, int *note_size) +{ + gdb_gregset_t gregs; + gdb_fpregset_t fpregs; +#ifdef HAVE_PTRACE_GETFPXREGS + gdb_fpxregset_t fpxregs; +#endif + unsigned long merged_pid = ptid_get_tid (ptid) << 16 | ptid_get_pid (ptid); + + fill_gregset (&gregs, -1); + note_data = (char *) elfcore_write_prstatus (obfd, + note_data, + note_size, + merged_pid, + stop_signal, + &gregs); + + fill_fpregset (&fpregs, -1); + note_data = (char *) elfcore_write_prfpreg (obfd, + note_data, + note_size, + &fpregs, + sizeof (fpregs)); +#ifdef HAVE_PTRACE_GETFPXREGS + fill_fpxregset (&fpxregs, -1); + note_data = (char *) elfcore_write_prxfpreg (obfd, + note_data, + note_size, + &fpxregs, + sizeof (fpxregs)); +#endif + return note_data; +} + +struct linux_corefile_thread_data { + bfd *obfd; + char *note_data; + int *note_size; +}; + +/* Function: linux_corefile_thread_callback + * + * Called by gdbthread.c once per thread. + * Records the thread's register state for the corefile note section. + */ + +static int +linux_corefile_thread_callback (struct thread_info *ti, void *data) +{ + struct linux_corefile_thread_data *args = data; + ptid_t saved_ptid = inferior_ptid; + + inferior_ptid = ti->ptid; + registers_changed (); + target_fetch_registers (-1); /* FIXME should not be necessary; + fill_gregset should do it automatically. */ + args->note_data = linux_do_thread_registers (args->obfd, + ti->ptid, + args->note_data, + args->note_size); + inferior_ptid = saved_ptid; + registers_changed (); + target_fetch_registers (-1); /* FIXME should not be necessary; + fill_gregset should do it automatically. */ + return 0; +} + +/* Function: linux_make_note_section + * + * Fills the "to_make_corefile_note" target vector. + * Builds the note section for a corefile, and returns it + * in a malloc buffer. + */ + +static char * +linux_make_note_section (bfd *obfd, int *note_size) +{ + struct linux_corefile_thread_data thread_args; + struct cleanup *old_chain; + char fname[16] = {'\0'}; + char psargs[80] = {'\0'}; + char *note_data = NULL; + ptid_t current_ptid = inferior_ptid; + + if (get_exec_file (0)) + { + strncpy (fname, strrchr (get_exec_file (0), '/') + 1, sizeof (fname)); + strncpy (psargs, get_exec_file (0), + sizeof (psargs)); + if (get_inferior_args ()) + { + strncat (psargs, " ", + sizeof (psargs) - strlen (psargs)); + strncat (psargs, get_inferior_args (), + sizeof (psargs) - strlen (psargs)); + } + note_data = (char *) elfcore_write_prpsinfo (obfd, + note_data, + note_size, + fname, + psargs); + } + + /* Dump information for threads. */ + thread_args.obfd = obfd; + thread_args.note_data = note_data; + thread_args.note_size = note_size; + iterate_over_threads (linux_corefile_thread_callback, &thread_args); + if (thread_args.note_data == note_data) + { + /* iterate_over_threads didn't come up with any threads; + just use inferior_ptid. */ + note_data = linux_do_thread_registers (obfd, inferior_ptid, + note_data, note_size); + } + else + { + note_data = thread_args.note_data; + } + + make_cleanup (xfree, note_data); + return note_data; +} + +void +_initialize_linux_proc (void) +{ + extern void inftarg_set_find_memory_regions (); + extern void inftarg_set_make_corefile_notes (); + + inftarg_set_find_memory_regions (linux_find_memory_regions); + inftarg_set_make_corefile_notes (linux_make_note_section); +} diff --git a/gdb/procfs.c b/gdb/procfs.c index 32b4e6054f3..1714970e961 100644 --- a/gdb/procfs.c +++ b/gdb/procfs.c @@ -1,5 +1,5 @@ /* Machine independent support for SVR4 /proc (process file system) for GDB. - Copyright 1999, 2000, 2001 Free Software Foundation, Inc. + Copyright 1999, 2000, 2001, 2002 Free Software Foundation, Inc. Written by Michael Snyder at Cygnus Solutions. Based on work by Fred Fish, Stu Grossman, Geoff Noer, and others. @@ -127,52 +127,62 @@ static int procfs_thread_alive (ptid_t); void procfs_find_new_threads (void); char *procfs_pid_to_str (ptid_t); +static int proc_find_memory_regions (int (*) (CORE_ADDR, + unsigned long, + int, int, int, + void *), + void *); + +static char * procfs_make_note_section (bfd *, int *); + struct target_ops procfs_ops; /* the target vector */ static void init_procfs_ops (void) { - procfs_ops.to_shortname = "procfs"; - procfs_ops.to_longname = "Unix /proc child process"; - procfs_ops.to_doc = + procfs_ops.to_shortname = "procfs"; + procfs_ops.to_longname = "Unix /proc child process"; + procfs_ops.to_doc = "Unix /proc child process (started by the \"run\" command)."; - procfs_ops.to_open = procfs_open; - procfs_ops.to_can_run = procfs_can_run; - procfs_ops.to_create_inferior = procfs_create_inferior; - procfs_ops.to_kill = procfs_kill_inferior; - procfs_ops.to_mourn_inferior = procfs_mourn_inferior; - procfs_ops.to_attach = procfs_attach; - procfs_ops.to_detach = procfs_detach; - procfs_ops.to_wait = procfs_wait; - procfs_ops.to_resume = procfs_resume; - procfs_ops.to_prepare_to_store = procfs_prepare_to_store; - procfs_ops.to_fetch_registers = procfs_fetch_registers; - procfs_ops.to_store_registers = procfs_store_registers; - procfs_ops.to_xfer_memory = procfs_xfer_memory; - procfs_ops.to_insert_breakpoint = memory_insert_breakpoint; - procfs_ops.to_remove_breakpoint = memory_remove_breakpoint; - procfs_ops.to_notice_signals = procfs_notice_signals; - procfs_ops.to_files_info = procfs_files_info; - procfs_ops.to_stop = procfs_stop; - - procfs_ops.to_terminal_init = terminal_init_inferior; - procfs_ops.to_terminal_inferior = terminal_inferior; + procfs_ops.to_open = procfs_open; + procfs_ops.to_can_run = procfs_can_run; + procfs_ops.to_create_inferior = procfs_create_inferior; + procfs_ops.to_kill = procfs_kill_inferior; + procfs_ops.to_mourn_inferior = procfs_mourn_inferior; + procfs_ops.to_attach = procfs_attach; + procfs_ops.to_detach = procfs_detach; + procfs_ops.to_wait = procfs_wait; + procfs_ops.to_resume = procfs_resume; + procfs_ops.to_prepare_to_store = procfs_prepare_to_store; + procfs_ops.to_fetch_registers = procfs_fetch_registers; + procfs_ops.to_store_registers = procfs_store_registers; + procfs_ops.to_xfer_memory = procfs_xfer_memory; + procfs_ops.to_insert_breakpoint = memory_insert_breakpoint; + procfs_ops.to_remove_breakpoint = memory_remove_breakpoint; + procfs_ops.to_notice_signals = procfs_notice_signals; + procfs_ops.to_files_info = procfs_files_info; + procfs_ops.to_stop = procfs_stop; + + procfs_ops.to_terminal_init = terminal_init_inferior; + procfs_ops.to_terminal_inferior = terminal_inferior; procfs_ops.to_terminal_ours_for_output = terminal_ours_for_output; - procfs_ops.to_terminal_ours = terminal_ours; - procfs_ops.to_terminal_info = child_terminal_info; - - procfs_ops.to_find_new_threads = procfs_find_new_threads; - procfs_ops.to_thread_alive = procfs_thread_alive; - procfs_ops.to_pid_to_str = procfs_pid_to_str; - - procfs_ops.to_has_all_memory = 1; - procfs_ops.to_has_memory = 1; - procfs_ops.to_has_execution = 1; - procfs_ops.to_has_stack = 1; - procfs_ops.to_has_registers = 1; - procfs_ops.to_stratum = process_stratum; - procfs_ops.to_has_thread_control = tc_schedlock; - procfs_ops.to_magic = OPS_MAGIC; + procfs_ops.to_terminal_ours = terminal_ours; + procfs_ops.to_terminal_info = child_terminal_info; + + procfs_ops.to_find_new_threads = procfs_find_new_threads; + procfs_ops.to_thread_alive = procfs_thread_alive; + procfs_ops.to_pid_to_str = procfs_pid_to_str; + + procfs_ops.to_has_all_memory = 1; + procfs_ops.to_has_memory = 1; + procfs_ops.to_has_execution = 1; + procfs_ops.to_has_stack = 1; + procfs_ops.to_has_registers = 1; + procfs_ops.to_stratum = process_stratum; + procfs_ops.to_has_thread_control = tc_schedlock; + procfs_ops.to_find_memory_regions = proc_find_memory_regions; + procfs_ops.to_make_corefile_notes = procfs_make_note_section; + procfs_ops.to_magic = OPS_MAGIC; } /* =================== END, TARGET_OPS "MODULE" =================== */ @@ -5354,6 +5364,65 @@ proc_iterate_over_mappings (int (*func) (int, CORE_ADDR)) return iterate_over_mappings (pi, func, pi, solib_mappings_callback); } +/* + * Function: find_memory_regions_callback + * + * Implements the to_find_memory_regions method. + * Calls an external function for each memory region. + * External function will have the signiture: + * + * int callback (CORE_ADDR vaddr, + * unsigned long size, + * int read, int write, int execute, + * void *data); + * + * Returns the integer value returned by the callback. + */ + +static int +find_memory_regions_callback (struct prmap *map, + int (*func) (CORE_ADDR, + unsigned long, + int, int, int, + void *), + void *data) +{ + return (*func) (host_pointer_to_address ((void *) map->pr_vaddr), + map->pr_size, + (map->pr_mflags & MA_READ) != 0, + (map->pr_mflags & MA_WRITE) != 0, + (map->pr_mflags & MA_EXEC) != 0, + data); +} + +/* + * Function: proc_find_memory_regions + * + * External interface. Calls a callback function once for each + * mapped memory region in the child process, passing as arguments + * CORE_ADDR virtual_address, + * unsigned long size, + * int read, TRUE if region is readable by the child + * int write, TRUE if region is writable by the child + * int execute TRUE if region is executable by the child. + * + * Stops iterating and returns the first non-zero value + * returned by the callback. + */ + +static int +proc_find_memory_regions (int (*func) (CORE_ADDR, + unsigned long, + int, int, int, + void *), + void *data) +{ + procinfo *pi = find_procinfo_or_die (PIDGET (inferior_ptid), 0); + + return iterate_over_mappings (pi, func, data, + find_memory_regions_callback); +} + /* * Function: mappingflags * @@ -5650,3 +5719,109 @@ procfs_first_available (void) { return pid_to_ptid (procinfo_list ? procinfo_list->pid : -1); } + +/* =================== GCORE .NOTE "MODULE" =================== */ + +static char * +procfs_do_thread_registers (bfd *obfd, ptid_t ptid, + char *note_data, int *note_size) +{ + gdb_gregset_t gregs; + gdb_fpregset_t fpregs; + unsigned long merged_pid; + + merged_pid = TIDGET (ptid) << 16 | PIDGET (ptid); + + fill_gregset (&gregs, -1); + note_data = (char *) elfcore_write_prstatus (obfd, + note_data, + note_size, + merged_pid, + stop_signal, + &gregs); + fill_fpregset (&fpregs, -1); + note_data = (char *) elfcore_write_prfpreg (obfd, + note_data, + note_size, + &fpregs, + sizeof (fpregs)); + return note_data; +} + +struct procfs_corefile_thread_data { + bfd *obfd; + char *note_data; + int *note_size; +}; + +static int +procfs_corefile_thread_callback (struct thread_info *ti, void *data) +{ + struct procfs_corefile_thread_data *args = data; + procinfo *pi = find_procinfo (PIDGET (ti->ptid), TIDGET (ti->ptid)); + + if (pi != NULL && TIDGET (ti->ptid) != 0) + { + ptid_t saved_ptid = inferior_ptid; + inferior_ptid = ti->ptid; + args->note_data = procfs_do_thread_registers (args->obfd, ti->ptid, + args->note_data, + args->note_size); + inferior_ptid = saved_ptid; + } + return 0; +} + +static char * +procfs_make_note_section (bfd *obfd, int *note_size) +{ + struct cleanup *old_chain; + gdb_gregset_t gregs; + gdb_fpregset_t fpregs; + char fname[16] = {'\0'}; + char psargs[80] = {'\0'}; + procinfo *pi = find_procinfo_or_die (PIDGET (inferior_ptid), 0); + char *note_data = NULL; + struct procfs_corefile_thread_data thread_args; + + if (get_exec_file (0)) + { + strncpy (fname, strrchr (get_exec_file (0), '/') + 1, sizeof (fname)); + strncpy (psargs, get_exec_file (0), + sizeof (psargs)); + if (get_inferior_args ()) + { + strncat (psargs, " ", + sizeof (psargs) - strlen (psargs)); + strncat (psargs, get_inferior_args (), + sizeof (psargs) - strlen (psargs)); + } + } + + note_data = (char *) elfcore_write_prpsinfo (obfd, + note_data, + note_size, + fname, + psargs); + + thread_args.obfd = obfd; + thread_args.note_data = note_data; + thread_args.note_size = note_size; + iterate_over_threads (procfs_corefile_thread_callback, &thread_args); + if (thread_args.note_data == note_data) + { + /* iterate_over_threads didn't come up with any threads; + just use inferior_ptid. */ + note_data = procfs_do_thread_registers (obfd, inferior_ptid, + note_data, note_size); + } + else + { + note_data = thread_args.note_data; + } + + make_cleanup (xfree, note_data); + return note_data; +} + +/* =================== END GCORE .NOTE "MODULE" =================== */ diff --git a/gdb/sol-thread.c b/gdb/sol-thread.c index 18b812ccbee..50caed39d99 100644 --- a/gdb/sol-thread.c +++ b/gdb/sol-thread.c @@ -1,5 +1,5 @@ /* Low level interface for debugging Solaris threads for GDB, the GNU debugger. - Copyright 1996, 1997, 1998, 1999, 2000, 2001 + Copyright 1996, 1997, 1998, 1999, 2000, 2001, 2002 Free Software Foundation, Inc. This file is part of GDB. @@ -1510,6 +1510,22 @@ info_solthreads (char *args, int from_tty) TD_SIGNO_MASK, TD_THR_ANY_USER_FLAGS); } +static int +sol_find_memory_regions (int (*func) (CORE_ADDR, + unsigned long, + int, int, int, + void *), + void *data) +{ + return procfs_ops.to_find_memory_regions (func, data); +} + +static char * +sol_make_note_section (bfd *obfd, int *note_size) +{ + return procfs_ops.to_make_corefile_notes (obfd, note_size); +} + static int ignore (CORE_ADDR addr, char *contents) { @@ -1561,6 +1577,8 @@ init_sol_thread_ops (void) sol_thread_ops.to_has_thread_control = tc_none; sol_thread_ops.to_sections = 0; sol_thread_ops.to_sections_end = 0; + sol_thread_ops.to_find_memory_regions = sol_find_memory_regions; + sol_thread_ops.to_make_corefile_notes = sol_make_note_section; sol_thread_ops.to_magic = OPS_MAGIC; } diff --git a/gdb/target.c b/gdb/target.c index 1a8723c37e5..1af88838f2b 100644 --- a/gdb/target.c +++ b/gdb/target.c @@ -1,6 +1,7 @@ /* Select target systems and architectures at runtime for GDB. Copyright 1990, 1991, 1992, 1993, 1994, 1995, 1996, 1997, 1998, 1999, - 2000, 2001 Free Software Foundation, Inc. + 2000, 2001, 2002 + Free Software Foundation, Inc. Contributed by Cygnus Support. This file is part of GDB. @@ -607,6 +608,8 @@ update_current_target (void) INHERIT (to_is_async_p, t); INHERIT (to_async, t); INHERIT (to_async_mask_value, t); + INHERIT (to_find_memory_regions, t); + INHERIT (to_make_corefile_notes, t); INHERIT (to_magic, t); #undef INHERIT @@ -1461,6 +1464,22 @@ normal_target_post_startup_inferior (ptid_t ptid) /* This space intentionally left blank. */ } +/* Error-catcher for target_find_memory_regions */ +/* ARGSUSED */ +static int dummy_find_memory_regions (int (*ignore1) (), void *ignore2) +{ + error ("No target."); + return 0; +} + +/* Error-catcher for target_make_corefile_notes */ +/* ARGSUSED */ +static char * dummy_make_corefile_notes (bfd *ignore1, int *ignore2) +{ + error ("No target."); + return NULL; +} + /* Set up the handful of non-empty slots needed by the dummy target vector. */ @@ -1477,6 +1496,8 @@ init_dummy_target (void) dummy_target.to_clone_and_follow_inferior = find_default_clone_and_follow_inferior; dummy_target.to_pid_to_str = normal_pid_to_str; dummy_target.to_stratum = dummy_stratum; + dummy_target.to_find_memory_regions = dummy_find_memory_regions; + dummy_target.to_make_corefile_notes = dummy_make_corefile_notes; dummy_target.to_magic = OPS_MAGIC; } diff --git a/gdb/target.h b/gdb/target.h index 18635d2484f..3d17becdfd1 100644 --- a/gdb/target.h +++ b/gdb/target.h @@ -1,6 +1,6 @@ /* Interface between GDB and target environments, including files and processes Copyright 1990, 1991, 1992, 1993, 1994, 1995, 1996, 1997, 1998, 1999, - 2000, 2001 Free Software Foundation, Inc. + 2000, 2001, 2002 Free Software Foundation, Inc. Contributed by Cygnus Support. Written by John Gilmore. This file is part of GDB. @@ -313,6 +313,12 @@ struct target_ops void (*to_async) (void (*cb) (enum inferior_event_type, void *context), void *context); int to_async_mask_value; + int (*to_find_memory_regions) (int (*) (CORE_ADDR, + unsigned long, + int, int, int, + void *), + void *); + char * (*to_make_corefile_notes) (bfd *, int *); int to_magic; /* Need sub-structure for target machine related rather than comm related? */ @@ -999,6 +1005,23 @@ extern void (*target_new_objfile_hook) (struct objfile *); #define target_pid_to_exec_file(pid) \ (current_target.to_pid_to_exec_file) (pid) +/* + * Iterator function for target memory regions. + * Calls a callback function once for each memory region 'mapped' + * in the child process. Defined as a simple macro rather than + * as a function macro so that it can be tested for nullity. + */ + +#define target_find_memory_regions(FUNC, DATA) \ + (current_target.to_find_memory_regions) (FUNC, DATA) + +/* + * Compose corefile .note section. + */ + +#define target_make_corefile_notes(BFD, SIZE_P) \ + (current_target.to_make_corefile_notes) (BFD, SIZE_P) + /* Hook to call target-dependent code after reading in a new symbol table. */ #ifndef TARGET_SYMFILE_POSTREAD -- 2.30.2