Implementing catch syscall.

* amd64-linux-tdep.c: Include xml-syscall.h header, define the XML
syscall name for the architecture.
(amd64_linux_get_syscall_number): New function.
(amd64_linux_init_abi): Register the correct functions for syscall
catchpoint; set the correct syscall file name.
* breakpoint.c: New include: xml-syscall.h.
(set_raw_breakpoint_without_location): Setting the parameters
for the catch syscall feature.
(insert_catch_syscall): New.
(remove_catch_syscall): New.
(breakpoint_hit_catch_syscall): New.
(print_it_catch_syscall): New.
(print_one_catch_syscall): New.
(print_mention_catch_syscall): New.
(catch_syscall_breakpoint_ops): New.
(syscall_catchpoint_p): New.
(create_catchpoint_without_mention): New.
(create_catchpoint): Modified in order to use
create_catchpoint_without_mention.
(create_syscall_event_catchpoint): New.
(clean_up_filters): New.
(catch_syscall_split_args): New.
(catch_syscall_command_1): New.
(delete_breakpoint): Add cleanup for catch syscall.
(is_syscall_catchpoint_enabled): New.
(catch_syscall_enabled): New.
(catching_syscall_number): New.
(catch_syscall_completer): New completer function.
(add_catch_command): Add the completer function for catchpoints.
* breakpoint.h (syscalls_to_be_caught): New vector.
(catch_syscall_enabled): New.
(catching_syscall_number): New.
* gdbarch.c: Regenerated.
* gdbarch.h: Regenerated.
* gdbarch.sh: Add syscall catchpoint functions and structures.
(get_syscall_number): New.
(UNKNOWN_SYSCALL): New definition.
* i386-linux-nat.c (i386_linux_resume): Select the proper request
to be made for ptrace() considering if we are catching syscalls
or not.
* i386-linux-tdep.c: Include xml-syscall.h header, define the XML
syscall name for the architecture.
(i386_linux_get_syscall_number): New.
(i386_linux_init_abi): Register the correct functions for syscall
catchpoint; set the correct syscall file name.
* inf-child.c (inf_child_set_syscall_catchpoint): New.
(inf_child_target): Assign default values to target_ops.
* inf-ptrace.c (inf_ptrace_resume): Select the proper request
to be made for ptrace() considering if we are catching syscalls
or not.
* inferior.h (struct inferior): Included new variables
any_syscall_count, syscalls_counts and total_syscalls_count,
used to keep track of requested syscall catchpoints.
* infrun.c (resume): Add syscall catchpoint.
(deal_with_syscall_event): New.
(handle_inferior_event): Add syscall entry/return events.
(inferior_has_called_syscall): New.
* linux-nat.c: Define some helpful variables to track wether we have
support for the needed ptrace option.
(linux_test_for_tracesysgood): New.
(linux_supports_tracesysgood): New.
(linux_enable_tracesysgood): New.
(linux_enable_event_reporting): Save the current used ptrace
options.
(linux_child_post_attach): Calling linux_enable_tracesysgood.
(linux_child_post_startup_inferior): Likewise.
(linux_child_set_syscall_catchpoint): New function.
(linux_handle_extended_wait): Handle the case which the inferior stops
because it has called or returned from a syscall.
(linux_target_install_ops): Install the necessary functions to handle
syscall catchpoints.
* linux-nat.h (struct lwp_info): Include syscall_state into the
structure, which indicates if we are in a syscall entry or return.
* ppc-linux-tdep.c: Include xml-syscall.h header, define the XML
syscall filename for the arch.
(ppc_linux_get_syscall_number): New.
(ppc_linux_init_abi): Register the correct functions for syscall
catchpoint; setting the correct name for the XML syscall file.
* target.c (update_current_target): Update/copy functions related to
syscall catchpoint.
(target_waitstatus_to_string): Add syscall catchpoint entry/return
events.
* target.h (struct target_waitstatus): Add syscall number.
(struct syscall): New struct to hold information about syscalls
in the system.
(struct target_ops): Add ops for syscall catchpoint.
(inferior_has_called_syscall): New.
(target_set_syscall_catchpoint): New.
* xml-support.c (xml_fetch_content_from_file): New function,
transferred from xml-tdesc.c.
* xml-support.h (xml_fetch_content_from_file): New.
* xml-tdesc.c (fetch_xml_from_file): Function removed;
transferred to xml-support.c.
(file_read_description_xml): Updated to use the new
xml_fetch_content_from_file function.
* syscalls/gdb-syscalls.dtd: New definition file for syscall's XML
support.
* syscalls/amd64-linux.xml: New file containing information about
syscalls for GNU/Linux systems that use amd64 architecture.
* syscalls/i386-linux.xml: New file containing information about
syscalls for GNU/Linux systems that use i386 architecture.
* syscalls/ppc-linux.xml: New file containing information about
syscalls for GNU/Linux systems that use PPC architecture.
* syscalls/ppc64-linux.xml: New file containing information about
syscalls for GNU/Linux systems that use PPC64 architecture.
* xml-syscall.c: New file containing functions for manipulating
syscall's XML files.
* xml-syscall.h: New file, exporting the functions above mentioned.
* Makefile.in: Support for relocatable GDB datadir and XML
syscall.
* NEWS: Added information about the catch syscall feature.
* doc/gdb.texinfo (Set Catchpoints): Documentation about the new
feature.
* testsuite/Makefile.in: Inclusion of catch-syscall object.
* testsuite/gdb.base/catch-syscall.c: New file.
* testsuite/gdb.base/catch-syscall.exp: New file.

1 files changed, 49 insertions, 6 deletions

diff --git a/gdb/Makefile.in b/gdb/Makefile.in
index 7f2fe58..d42d6fb 100644
--- a/gdb/Makefile.in
+++ b/gdb/Makefile.in
@@ -166,6 +166,9 @@ INTL_CFLAGS = @INCINTL@
 TARGET_SYSTEM_ROOT = @TARGET_SYSTEM_ROOT@
 TARGET_SYSTEM_ROOT_DEFINE = @TARGET_SYSTEM_ROOT_DEFINE@
 
+# Did the user give us a --with-gdb-datadir option?
+GDB_DATADIR_PATH = @GDB_DATADIR_PATH@
+
 # Helper code from gnulib.
 LIBGNU = gnulib/libgnu.a
 INCGNU = -I$(srcdir)/gnulib -Ignulib
@@ -677,7 +680,8 @@ SFILES = ada-exp.y ada-lang.c ada-typeprint.c ada-valprint.c ada-tasks.c \
 	xml-tdesc.c xml-support.c \
 	inferior.c gdb_usleep.c \
 	record.c \
-	jit.c
+	jit.c \
+	xml-syscall.c \
 
 LINTFILES = $(SFILES) $(YYFILES) $(CONFIG_SRCS) init.c
 
@@ -746,7 +750,7 @@ config/rs6000/nm-rs6000.h top.h bsd-kvm.h gdb-stabs.h reggroups.h \
 annotate.h sim-regno.h dictionary.h dfp.h main.h frame-unwind.h	\
 remote-fileio.h i386-linux-tdep.h vax-tdep.h objc-lang.h \
 sentinel-frame.h bcache.h symfile.h windows-tdep.h linux-tdep.h \
-gdb_usleep.h jit.h
+gdb_usleep.h jit.h xml-syscall.h
 
 # Header files that already have srcdir in them, or which are in objdir.
 
@@ -826,11 +830,17 @@ COMMON_OBS = $(DEPFILES) $(CONFIG_OBS) $(YYOBJ) \
 	trad-frame.o \
 	tramp-frame.o \
 	solib.o solib-null.o \
-	prologue-value.o memory-map.o xml-support.o \
+	prologue-value.o memory-map.o xml-support.o xml-syscall.o \
 	target-descriptions.o target-memory.o xml-tdesc.o xml-builtin.o \
 	inferior.o osdata.o gdb_usleep.o record.o \
 	jit.o
 
+# Definitions for the syscall's XML files and dir
+XML_SYSCALLS_DIR = syscalls/
+XML_SYSCALLS_FILES = gdb-syscalls.dtd \
+		     ppc-linux.xml ppc64-linux.xml \
+		     i386-linux.xml amd64-linux.xml
+
 TSOBS = inflow.o
 
 SUBDIRS = @subdirs@
@@ -864,11 +874,41 @@ generated_files = config.h observer.h observer.inc ada-lex.c \
 	$(COMPILE) $<
 	$(POSTCOMPILE)
 
-all: gdb$(EXEEXT) $(CONFIG_ALL)
+all: gdb$(EXEEXT) $(CONFIG_ALL) xml-syscall-copy
 	@$(MAKE) $(FLAGS_TO_PASS) DO=all "DODIRS=`echo $(SUBDIRS) | sed 's/testsuite//'`" subdir_do
 .PHONY: all-tui
 all-tui: $(TUI)$(EXEEXT)
 
+# This is needed for running GDB from the build directory
+.PHONY: xml-syscall-copy
+xml-syscall-copy:
+	if [ "`cd $(srcdir) && pwd`" != "`pwd`" ] ; then \
+	  mkdir -p ./$(XML_SYSCALLS_DIR) ; \
+	  list='$(XML_SYSCALLS_FILES)' ; \
+ 	  for file in $$list ; do \
+	    f=$(srcdir)/$(XML_SYSCALLS_DIR)/$$file ; \
+	    if test -f $$f ; then \
+	      $(INSTALL_DATA) $$f \
+	    	  ./$(XML_SYSCALLS_DIR) ; \
+	    fi ; \
+	  done ; \
+	fi ;
+
+# This target is responsible for properly installing the syscalls'
+# XML files in the system.
+.PHONY: xml-syscall-install
+xml-syscall-install:
+	$(SHELL) $(srcdir)/../mkinstalldirs \
+		$(DESTDIR)$(GDB_DATADIR_PATH)/$(XML_SYSCALLS_DIR) ; \
+	list='$(XML_SYSCALLS_FILES)' ; \
+	for file in $$list ; do \
+	  f=$(srcdir)/$(XML_SYSCALLS_DIR)/$$file ; \
+	  if test -f $$f ; then \
+	    $(INSTALL_DATA) $$f \
+	    	$(DESTDIR)$(GDB_DATADIR_PATH)/$(XML_SYSCALLS_DIR) ; \
+	  fi ; \
+	done ;
+
 installcheck:
 
 # The check target can not use subdir_do, because subdir_do does not
@@ -925,8 +965,11 @@ gdb.z:gdb.1
 # source file and doesn't care about rebuilding or just wants to save the
 # time it takes for make to check that all is up to date.
 # install-only is intended to address that need.
-install: all install-only
-install-only: $(CONFIG_INSTALL)
+install: all install-only 
+
+# The "install-only" target also installs the syscalls' XML files in
+# the system.
+install-only: $(CONFIG_INSTALL) xml-syscall-install
 	transformed_name=`t='$(program_transform_name)'; \
 			  echo gdb | sed -e "$$t"` ; \
 		if test "x$$transformed_name" = x; then \