From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (qmail 63252 invoked by alias); 26 May 2016 18:22:48 -0000 Mailing-List: contact gdb-patches-help@sourceware.org; run by ezmlm Precedence: bulk List-Id: List-Subscribe: List-Archive: List-Post: List-Help: , Sender: gdb-patches-owner@sourceware.org Received: (qmail 63243 invoked by uid 89); 26 May 2016 18:22:47 -0000 Authentication-Results: sourceware.org; auth=none X-Virus-Found: No X-Spam-SWARE-Status: No, score=-3.3 required=5.0 tests=BAYES_00,RP_MATCHES_RCVD,SPF_HELO_PASS autolearn=ham version=3.3.2 spammy=implied, Structure, REQUIRED, represents X-HELO: mx1.redhat.com Received: from mx1.redhat.com (HELO mx1.redhat.com) (209.132.183.28) by sourceware.org (qpsmtpd/0.93/v0.84-503-g423c35a) with (AES256-GCM-SHA384 encrypted) ESMTPS; Thu, 26 May 2016 18:22:37 +0000 Received: from int-mx11.intmail.prod.int.phx2.redhat.com (int-mx11.intmail.prod.int.phx2.redhat.com [10.5.11.24]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mx1.redhat.com (Postfix) with ESMTPS id 18BEA486B9; Thu, 26 May 2016 18:22:36 +0000 (UTC) Received: from localhost (unused-10-15-17-51.yyz.redhat.com [10.15.17.51]) by int-mx11.intmail.prod.int.phx2.redhat.com (8.14.4/8.14.4) with ESMTP id u4QIMZif003048 (version=TLSv1/SSLv3 cipher=DHE-RSA-AES256-GCM-SHA384 bits=256 verify=NO); Thu, 26 May 2016 14:22:35 -0400 From: Sergio Durigan Junior To: Gabriel Krisman Bertazi Cc: gdb-patches@sourceware.org, palves@redhat.com, dje@google.com Subject: Re: [PATCH v6 1/5] Implemement support for groups of syscalls in the xml-syscall interface. References: <87shxd1mx2.fsf@oberon.home> <1463712948-9068-1-git-send-email-gabriel@krisman.be> X-URL: http://blog.sergiodj.net Date: Thu, 26 May 2016 18:22:00 -0000 In-Reply-To: <1463712948-9068-1-git-send-email-gabriel@krisman.be> (Gabriel Krisman Bertazi's message of "Thu, 19 May 2016 23:55:44 -0300") Message-ID: <87eg8o8ys4.fsf@redhat.com> User-Agent: Gnus/5.13 (Gnus v5.13) Emacs/24.5 (gnu/linux) MIME-Version: 1.0 Content-Type: text/plain X-IsSubscribed: yes X-SW-Source: 2016-05/txt/msg00472.txt.bz2 On Thursday, May 19 2016, Gabriel Krisman Bertazi wrote: > This is done by maintaining a list of syscall_group_desc for each > syscall group inside the syscalls_info structure. Inside each > syscall_group_desc we have a vector of pointers to the syscalls that are > part of that group. > > gdb/ > > * syscalls/gdb-syscalls.dtd: Include group attribute to the > syscall element. > * xml-syscall.c (get_syscalls_by_group): New. > (get_syscall_group_names): New. > (struct syscall_group_desc): New structure to store group data. > (struct syscalls_info): Include field to store the group list. > (sysinfo_free_syscall_group_desc): New. > (free_syscalls_info): Free group list. > (syscall_group_create_syscall_group_desc): New. > (syscall_group_add_syscall): New. > (syscall_create_syscall_desc): Add syscall to its groups. > (syscall_start_syscall): Load group attribute. > (syscall_group_get_group_by_name): New. > (xml_list_syscalls_by_group): New. > (xml_list_of_groups): New. > * xml-syscall.h (get_syscalls_by_group): Export function > to retrieve a list of syscalls filtered by the group name. > (get_syscall_group_names): Export function to retrieve the list > of syscall groups. > --- > gdb/syscalls/gdb-syscalls.dtd | 3 +- > gdb/xml-syscall.c | 234 +++++++++++++++++++++++++++++++++++++++++- > gdb/xml-syscall.h | 16 +++ > 3 files changed, 250 insertions(+), 3 deletions(-) > > diff --git a/gdb/syscalls/gdb-syscalls.dtd b/gdb/syscalls/gdb-syscalls.dtd > index 3deda12..de47d4d 100644 > --- a/gdb/syscalls/gdb-syscalls.dtd > +++ b/gdb/syscalls/gdb-syscalls.dtd > @@ -11,4 +11,5 @@ > > name CDATA #REQUIRED > - number CDATA #REQUIRED> > + number CDATA #REQUIRED > + groups CDATA #IMPLIED> > diff --git a/gdb/xml-syscall.c b/gdb/xml-syscall.c > index ceaf750..c7c307e 100644 > --- a/gdb/xml-syscall.c > +++ b/gdb/xml-syscall.c > @@ -77,6 +77,20 @@ get_syscall_names (struct gdbarch *gdbarch) > return NULL; > } > > +struct syscall * > +get_syscalls_by_group (struct gdbarch *gdbarch, const char *group) > +{ > + syscall_warn_user (); > + return NULL; > +} > + > +const char ** > +get_syscall_group_names (struct gdbarch *gdbarch) > +{ > + syscall_warn_user (); > + return NULL; > +} > + > #else /* ! HAVE_LIBEXPAT */ > > /* Structure which describes a syscall. */ > @@ -92,6 +106,19 @@ typedef struct syscall_desc > } *syscall_desc_p; > DEF_VEC_P(syscall_desc_p); > > +/* Structure of a syscall group. */ > +typedef struct syscall_group_desc > +{ > + /* The group name. */ > + > + char *name; > + > + /* The syscalls that are part of the group. */ > + > + VEC(syscall_desc_p) *syscalls; > +} *syscall_group_desc_p; > +DEF_VEC_P(syscall_group_desc_p); > + > /* Structure that represents syscalls information. */ > struct syscalls_info > { > @@ -99,6 +126,10 @@ struct syscalls_info > > VEC(syscall_desc_p) *syscalls; > > + /* The syscall groups. */ > + > + VEC(syscall_group_desc_p) *groups; > + > /* Variable that will hold the last known data-directory. This is > useful to know whether we should re-read the XML info for the > target. */ > @@ -126,11 +157,21 @@ syscalls_info_free_syscalls_desc (struct syscall_desc *sd) > xfree (sd->name); > } > > +/* Free syscall_group_desc members but not the structure itself. */ > + > +static void > +syscalls_info_free_syscall_group_desc (struct syscall_group_desc *sd) > +{ > + VEC_free (syscall_desc_p, sd->syscalls); > + xfree (sd->name); > +} > + > static void > free_syscalls_info (void *arg) > { > struct syscalls_info *syscalls_info = (struct syscalls_info *) arg; > struct syscall_desc *sysdesc; > + struct syscall_group_desc *groupdesc; > int i; > > xfree (syscalls_info->my_gdb_datadir); > @@ -144,6 +185,17 @@ free_syscalls_info (void *arg) > VEC_free (syscall_desc_p, syscalls_info->syscalls); > } > > + if (syscalls_info->groups != NULL) > + { > + for (i = 0; > + VEC_iterate (syscall_group_desc_p, > + syscalls_info->groups, i, groupdesc); > + i++) > + syscalls_info_free_syscall_group_desc (groupdesc); > + > + VEC_free (syscall_group_desc_p, syscalls_info->groups); > + } > + > xfree (syscalls_info); > } > > @@ -153,16 +205,73 @@ make_cleanup_free_syscalls_info (struct syscalls_info *syscalls_info) > return make_cleanup (free_syscalls_info, syscalls_info); > } > > +/* Create a new syscall group. Return pointer to the > + syscall_group_desc structure that represents the new group. */ > + > +static struct syscall_group_desc * > +syscall_group_create_syscall_group_desc (struct syscalls_info *syscalls_info, > + const char *group) > +{ > + struct syscall_group_desc *groupdesc = XCNEW (struct syscall_group_desc); > + > + groupdesc->name = xstrdup (group); > + > + VEC_safe_push (syscall_group_desc_p, syscalls_info->groups, groupdesc); > + > + return groupdesc; > +} > + > +/* Add a syscall to the group. If group doesn't exist, create it. */ > + > +static void > +syscall_group_add_syscall (struct syscalls_info *syscalls_info, > + struct syscall_desc *syscall, > + const char *group) > +{ > + struct syscall_group_desc *groupdesc; Minor nit: assign NULL to this variable here. > + int i; > + > + /* Search for an existing group. */ > + for (i = 0; > + VEC_iterate (syscall_group_desc_p, syscalls_info->groups, i, groupdesc); > + i++) > + { > + if (strcmp (groupdesc->name, group) == 0) > + break; > + } > + > + if (groupdesc == NULL) > + { > + /* No group was found with this name. We must create a new > + one. */ > + groupdesc = syscall_group_create_syscall_group_desc (syscalls_info, > + group); > + } > + > + VEC_safe_push (syscall_desc_p, groupdesc->syscalls, syscall); > +} > + > static void > syscall_create_syscall_desc (struct syscalls_info *syscalls_info, > - const char *name, int number) > + const char *name, int number, > + char *groups) > { > struct syscall_desc *sysdesc = XCNEW (struct syscall_desc); > + char *group; > > sysdesc->name = xstrdup (name); > sysdesc->number = number; > > VEC_safe_push (syscall_desc_p, syscalls_info->syscalls, sysdesc); > + > + /* Add syscall to its groups. */ > + if (groups != NULL) > + { > + for (group = strtok (groups, ","); > + group != NULL; > + group = strtok (NULL, ",")) > + syscall_group_add_syscall (syscalls_info, sysdesc, group); > + } > } > > /* Handle the start of a element. */ > @@ -177,6 +286,7 @@ syscall_start_syscall (struct gdb_xml_parser *parser, > /* syscall info. */ > char *name = NULL; > int number = 0; > + char *groups = NULL; > > len = VEC_length (gdb_xml_value_s, attributes); > > @@ -186,13 +296,15 @@ syscall_start_syscall (struct gdb_xml_parser *parser, > name = (char *) attrs[i].value; > else if (strcmp (attrs[i].name, "number") == 0) > number = * (ULONGEST *) attrs[i].value; > + else if (strcmp (attrs[i].name, "groups") == 0) > + groups = (char *) attrs[i].value; > else > internal_error (__FILE__, __LINE__, > _("Unknown attribute name '%s'."), attrs[i].name); > } > > gdb_assert (name); > - syscall_create_syscall_desc (data->syscalls_info, name, number); > + syscall_create_syscall_desc (data->syscalls_info, name, number, groups); > } > > > @@ -200,6 +312,7 @@ syscall_start_syscall (struct gdb_xml_parser *parser, > static const struct gdb_xml_attribute syscall_attr[] = { > { "number", GDB_XML_AF_NONE, gdb_xml_parse_attr_ulongest, NULL }, > { "name", GDB_XML_AF_NONE, NULL, NULL }, > + { "groups", GDB_XML_AF_OPTIONAL, NULL, NULL }, > { NULL, GDB_XML_AF_NONE, NULL, NULL } > }; > > @@ -321,6 +434,34 @@ init_syscalls_info (struct gdbarch *gdbarch) > set_gdbarch_syscalls_info (gdbarch, syscalls_info); > } > > +/* Search for a syscall group by its name. Return syscall_group_desc > + structure for the group if found or NULL otherwise. */ > + > +static struct syscall_group_desc * > +syscall_group_get_group_by_name (const struct syscalls_info *syscalls_info, > + const char *group) > +{ > + struct syscall_group_desc *groupdesc; > + int i; > + > + if (syscalls_info == NULL) > + return NULL; > + > + if (group == NULL) > + return NULL; > + > + /* Search for existing group. */ > + for (i = 0; > + VEC_iterate (syscall_group_desc_p, syscalls_info->groups, i, groupdesc); > + i++) > + { > + if (strcmp (groupdesc->name, group) == 0) > + return groupdesc; > + } > + > + return NULL; > +} > + > static int > xml_get_syscall_number (struct gdbarch *gdbarch, > const char *syscall_name) > @@ -388,6 +529,75 @@ xml_list_of_syscalls (struct gdbarch *gdbarch) > return names; > } > > +/* Iterate over the syscall_group_desc element to return a list of > + syscalls that are part of the given group, terminated by an empty > + element. If the syscall group doesn't exist, return NULL. */ > + > +static struct syscall * > +xml_list_syscalls_by_group (struct gdbarch *gdbarch, const char *group) > +{ > + struct syscalls_info *syscalls_info = gdbarch_syscalls_info (gdbarch); > + struct syscall_group_desc *groupdesc; > + struct syscall_desc *sysdesc; > + struct syscall *syscalls = NULL; > + int nsyscalls; > + int i; > + > + if (syscalls_info == NULL) > + return NULL; > + > + groupdesc = syscall_group_get_group_by_name (syscalls_info, group); > + if (groupdesc == NULL) > + return NULL; > + > + nsyscalls = VEC_length (syscall_desc_p, groupdesc->syscalls); > + syscalls = (struct syscall*) xmalloc ((nsyscalls + 1) > + * sizeof (struct syscall)); > + > + for (i = 0; > + VEC_iterate (syscall_desc_p, groupdesc->syscalls, i, sysdesc); > + i++) > + { > + syscalls[i].name = sysdesc->name; > + syscalls[i].number = sysdesc->number; > + } > + > + /* Add final element marker. */ > + syscalls[i].name = NULL; > + syscalls[i].number = 0; > + > + return syscalls; > +} > + > +/* Return a NULL terminated list of syscall groups or an empty list, if > + no syscall group is available. Return NULL, if there is no syscall > + information available. */ > + > +static const char ** > +xml_list_of_groups (struct gdbarch *gdbarch) > +{ > + struct syscalls_info *syscalls_info = gdbarch_syscalls_info (gdbarch); > + struct syscall_group_desc *groupdesc; > + const char **names = NULL; > + int i; > + int ngroups; > + > + if (syscalls_info == NULL) > + return NULL; > + > + ngroups = VEC_length (syscall_group_desc_p, syscalls_info->groups); > + names = (const char**) xmalloc ((ngroups + 1) * sizeof (char *)); > + > + for (i = 0; > + VEC_iterate (syscall_group_desc_p, syscalls_info->groups, i, groupdesc); > + i++) > + names[i] = groupdesc->name; > + > + names[i] = NULL; > + > + return names; > +} > + > void > set_xml_syscall_file_name (struct gdbarch *gdbarch, const char *name) > { > @@ -422,4 +632,24 @@ get_syscall_names (struct gdbarch *gdbarch) > return xml_list_of_syscalls (gdbarch); > } > > +/* See comment in xml-syscall.h. */ > + > +struct syscall * > +get_syscalls_by_group (struct gdbarch *gdbarch, const char *group) > +{ > + init_syscalls_info (gdbarch); > + > + return xml_list_syscalls_by_group (gdbarch, group); > +} > + > +/* See comment in xml-syscall.h. */ > + > +const char ** > +get_syscall_group_names (struct gdbarch *gdbarch) > +{ > + init_syscalls_info (gdbarch); > + > + return xml_list_of_groups (gdbarch); > +} > + > #endif /* ! HAVE_LIBEXPAT */ > diff --git a/gdb/xml-syscall.h b/gdb/xml-syscall.h > index b0dd401..407613e 100644 > --- a/gdb/xml-syscall.h > +++ b/gdb/xml-syscall.h > @@ -50,4 +50,20 @@ void get_syscall_by_name (struct gdbarch *gdbarch, > > const char **get_syscall_names (struct gdbarch *gdbarch); > > +/* Function used to retrieve the list of syscalls of a given group in > + the system. Return a list of syscalls that are element of the > + group, terminated by an empty element. The list is malloc'ed > + and must be freed by the caller. If group doesn't exist, return > + NULL. */ > + > +struct syscall *get_syscalls_by_group (struct gdbarch *gdbarch, > + const char *group); > + > +/* Function used to retrieve the list of syscall groups in the system. > + Return an array of strings terminated by a NULL element. The list > + must be freed by the caller. Return NULL if there is no syscall > + information available. */ > + > +const char **get_syscall_group_names (struct gdbarch *gdbarch); > + > #endif /* XML_SYSCALL_H */ > -- > 2.4.11 Just one minor nit (above). Otherwise, LGTM. -- Sergio GPG key ID: 237A 54B1 0287 28BF 00EF 31F4 D0EB 7628 65FC 5E36 Please send encrypted e-mail if possible http://sergiodj.net/