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analyze: add 'malloc' verb to dump malloc_info()
Gets the memory state of the manager: root@image:~# systemd-analyze malloc <malloc version=1> <heap nr=0> <sizes> <size from=33 to=33 total=396 count=12/> <unsorted from=20385 to=20385 total=20385 count=1/> </sizes> <total type=fast count=0 size=0/> <total type=rest count=14 size=36589/> <system type=current size=1691648/> <system type=max size=1839104/> <aspace type=total size=1691648/> <aspace type=mprotect size=1691648/> </heap> <total type=fast count=0 size=0/> <total type=rest count=14 size=36589/> <total type=mmap count=0 size=0/> <system type=current size=1691648/> <system type=max size=1839104/> <aspace type=total size=1691648/> <aspace type=mprotect size=1691648/> </malloc>
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@ -139,6 +139,12 @@
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<arg choice="plain">security</arg>
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<arg choice="plain" rep="repeat"><replaceable>UNIT</replaceable></arg>
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</cmdsynopsis>
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<cmdsynopsis>
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<command>systemd-analyze</command>
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<arg choice="opt" rep="repeat">OPTIONS</arg>
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<arg choice="plain">malloc</arg>
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<arg choice="opt" rep="repeat"><replaceable>D-BUS SERVICE</replaceable></arg>
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</cmdsynopsis>
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</refsynopsisdiv>
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<refsect1>
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@ -271,6 +277,16 @@ Timestamp units-load-finish: Thu 2019-03-14 23:28:07 CET
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</example>
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</refsect2>
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<refsect2>
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<title><command>systemd-analyze malloc [<replaceable>D-Bus service</replaceable>…]</command></title>
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<para>This command can be used to request the output of the internal memory state (as returned by
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<citerefentry><refentrytitle>malloc_info</refentrytitle><manvolnum>3</manvolnum></citerefentry>) of
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a D-Bus service implementing this pattern. If no service is specified, the command will be sent to
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<filename>org.freedesktop.systemd1</filename> (the system or user service manager). The output format
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is subject to change without notice and should not be parsed by applications.</para>
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</refsect2>
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<refsect2>
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<title><command>systemd-analyze plot</command></title>
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@ -29,21 +29,6 @@ static int dump_fallback(sd_bus *bus) {
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return 0;
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}
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static int dump_fd_reply(sd_bus_message *message) {
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int fd, r;
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r = sd_bus_message_read(message, "h", &fd);
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if (r < 0)
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return bus_log_parse_error(r);
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fflush(stdout);
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r = copy_bytes(fd, STDOUT_FILENO, UINT64_MAX, 0);
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if (r < 0)
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return r;
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return 1; /* Success */
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}
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static int dump(sd_bus *bus) {
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_cleanup_(sd_bus_error_free) sd_bus_error error = SD_BUS_ERROR_NULL;
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_cleanup_(sd_bus_message_unrefp) sd_bus_message *reply = NULL;
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63
src/analyze/analyze-malloc.c
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63
src/analyze/analyze-malloc.c
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@ -0,0 +1,63 @@
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/* SPDX-License-Identifier: LGPL-2.1-or-later */
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#include "sd-bus.h"
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#include "analyze-malloc.h"
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#include "analyze.h"
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#include "bus-error.h"
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#include "bus-internal.h"
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static int dump_malloc_info(sd_bus *bus, char *service) {
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_cleanup_(sd_bus_error_free) sd_bus_error error = SD_BUS_ERROR_NULL;
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_cleanup_(sd_bus_message_unrefp) sd_bus_message *reply = NULL;
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int r;
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assert(bus);
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assert(service);
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r = sd_bus_call_method(bus,
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service,
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"/org/freedesktop/MemoryAllocation1",
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"org.freedesktop.MemoryAllocation1",
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"GetMallocInfo",
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&error,
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&reply,
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NULL);
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if (r < 0)
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return log_error_errno(r, "Failed to call GetMallocInfo on '%s': %s", service, bus_error_message(&error, r));
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return dump_fd_reply(reply);
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}
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int verb_malloc(int argc, char *argv[], void *userdata) {
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_cleanup_(sd_bus_flush_close_unrefp) sd_bus *bus = NULL;
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char **services = STRV_MAKE("org.freedesktop.systemd1");
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int r;
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if (!strv_isempty(strv_skip(argv, 1))) {
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services = strv_skip(argv, 1);
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STRV_FOREACH(service, services)
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if (!service_name_is_valid(*service))
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return log_error_errno(SYNTHETIC_ERRNO(EINVAL), "D-Bus service name '%s' is not valid.", *service);
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}
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r = acquire_bus(&bus, NULL);
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if (r < 0)
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return bus_log_connect_error(r, arg_transport);
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r = sd_bus_can_send(bus, SD_BUS_TYPE_UNIX_FD);
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if (r < 0)
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return log_error_errno(r, "Unable to determine if bus connection supports fd passing: %m");
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if (r == 0)
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return log_error_errno(SYNTHETIC_ERRNO(EOPNOTSUPP), "Unable to receive FDs over D-Bus.");
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pager_open(arg_pager_flags);
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STRV_FOREACH(service, services) {
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r = dump_malloc_info(bus, *service);
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if (r < 0)
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return r;
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}
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return EXIT_SUCCESS;
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}
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5
src/analyze/analyze-malloc.h
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5
src/analyze/analyze-malloc.h
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@ -0,0 +1,5 @@
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/* SPDX-License-Identifier: LGPL-2.1-or-later */
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#pragma once
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int verb_malloc(int argc, char *argv[], void *userdata);
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@ -25,6 +25,7 @@
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#include "analyze-filesystems.h"
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#include "analyze-inspect-elf.h"
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#include "analyze-log-control.h"
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#include "analyze-malloc.h"
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#include "analyze-plot.h"
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#include "analyze-security.h"
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#include "analyze-service-watchdogs.h"
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@ -166,6 +167,23 @@ void time_parsing_hint(const char *p, bool calendar, bool timestamp, bool timesp
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"Use 'systemd-analyze timespan \"%s\"' instead?", p);
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}
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int dump_fd_reply(sd_bus_message *message) {
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int fd, r;
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assert(message);
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r = sd_bus_message_read(message, "h", &fd);
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if (r < 0)
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return bus_log_parse_error(r);
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fflush(stdout);
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r = copy_bytes(fd, STDOUT_FILENO, UINT64_MAX, 0);
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if (r < 0)
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return r;
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return 1; /* Success */
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}
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static int help(int argc, char *argv[], void *userdata) {
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_cleanup_free_ char *link = NULL, *dot_link = NULL;
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int r;
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@ -211,6 +229,7 @@ static int help(int argc, char *argv[], void *userdata) {
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" timespan SPAN... Validate a time span\n"
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" security [UNIT...] Analyze security of unit\n"
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" inspect-elf FILE... Parse and print ELF package metadata\n"
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" malloc [D-BUS SERVICE...] Dump malloc stats of a D-Bus service\n"
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"\nOptions:\n"
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" --recursive-errors=MODE Control which units are verified\n"
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" --offline=BOOL Perform a security review on unit file(s)\n"
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@ -601,6 +620,7 @@ static int run(int argc, char *argv[]) {
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{ "timespan", 2, VERB_ANY, 0, verb_timespan },
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{ "security", VERB_ANY, VERB_ANY, 0, verb_security },
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{ "inspect-elf", 2, VERB_ANY, 0, verb_elf_inspection },
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{ "malloc", VERB_ANY, VERB_ANY, 0, verb_malloc },
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{}
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};
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@ -44,3 +44,5 @@ int acquire_bus(sd_bus **bus, bool *use_full_bus);
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int bus_get_unit_property_strv(sd_bus *bus, const char *path, const char *property, char ***strv);
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void time_parsing_hint(const char *p, bool calendar, bool timestamp, bool timespan);
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int dump_fd_reply(sd_bus_message *message);
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@ -14,6 +14,7 @@ systemd_analyze_sources = files(
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'analyze-filesystems.c',
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'analyze-inspect-elf.c',
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'analyze-log-control.c',
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'analyze-malloc.c',
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'analyze-plot.c',
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'analyze-security.c',
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'analyze-service-watchdogs.c',
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@ -56,6 +56,7 @@ systemd-analyze dump "*" >/dev/null
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systemd-analyze dump "*.socket" >/dev/null
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systemd-analyze dump "*.socket" "*.service" aaaaaaa ... >/dev/null
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systemd-analyze dump systemd-journald.service >/dev/null
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systemd-analyze malloc >/dev/null
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(! systemd-analyze dump "")
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# unit-files
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systemd-analyze unit-files >/dev/null
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