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[PULL 14/22] plugins/hwprofile: adapt to the new plugin arguments scheme
From: |
Alex Bennée |
Subject: |
[PULL 14/22] plugins/hwprofile: adapt to the new plugin arguments scheme |
Date: |
Fri, 3 Sep 2021 10:03:31 +0100 |
From: Mahmoud Mandour <ma.mandourr@gmail.com>
Parsing boolean arguments correctly (e.g. pattern=on or source=false).
Introduced a new "track" argument that takes a [read|write] value. This
substitutes passing read or write to "arg=" that is deprecated.
Also, matches are now taken one by one through the "match" argument.
Signed-off-by: Mahmoud Mandour <ma.mandourr@gmail.com>
Reviewed-by: Alex Bennée <alex.bennee@linaro.org>
Tested-by: Alex Bennée <alex.bennee@linaro.org>
Signed-off-by: Alex Bennée <alex.bennee@linaro.org>
Message-Id: <20210730135817.17816-7-ma.mandourr@gmail.com>
diff --git a/docs/devel/tcg-plugins.rst b/docs/devel/tcg-plugins.rst
index 5cddf31c70..e1f9eff587 100644
--- a/docs/devel/tcg-plugins.rst
+++ b/docs/devel/tcg-plugins.rst
@@ -306,22 +306,22 @@ which will eventually report::
The hwprofile tool can only be used with system emulation and allows
the user to see what hardware is accessed how often. It has a number of
options:
- * arg=read or arg=write
+ * track=read or track=write
By default the plugin tracks both reads and writes. You can use one
of these options to limit the tracking to just one class of accesses.
- * arg=source
+ * source
Will include a detailed break down of what the guest PC that made the
- access was. Not compatible with arg=pattern. Example output::
+ access was. Not compatible with the pattern option. Example output::
cirrus-low-memory @ 0xfffffd00000a0000
pc:fffffc0000005cdc, 1, 256
pc:fffffc0000005ce8, 1, 256
pc:fffffc0000005cec, 1, 256
- * arg=pattern
+ * pattern
Instead break down the accesses based on the offset into the HW
region. This can be useful for seeing the most used registers of a
diff --git a/contrib/plugins/hwprofile.c b/contrib/plugins/hwprofile.c
index faf216ac00..691d4edb0c 100644
--- a/contrib/plugins/hwprofile.c
+++ b/contrib/plugins/hwprofile.c
@@ -259,27 +259,42 @@ int qemu_plugin_install(qemu_plugin_id_t id, const
qemu_info_t *info,
int argc, char **argv)
{
int i;
+ g_autoptr(GString) matches_raw = g_string_new("");
for (i = 0; i < argc; i++) {
char *opt = argv[i];
- if (g_strcmp0(opt, "read") == 0) {
- rw = QEMU_PLUGIN_MEM_R;
- } else if (g_strcmp0(opt, "write") == 0) {
- rw = QEMU_PLUGIN_MEM_W;
- } else if (g_strcmp0(opt, "pattern") == 0) {
- pattern = true;
- } else if (g_strcmp0(opt, "source") == 0) {
- source = true;
- } else if (g_str_has_prefix(opt, "match")) {
- gchar **parts = g_strsplit(opt, "=", 2);
+ g_autofree char **tokens = g_strsplit(opt, "=", 2);
+
+ if (g_strcmp0(tokens[0], "track") == 0) {
+ if (g_strcmp0(tokens[1], "read") == 0) {
+ rw = QEMU_PLUGIN_MEM_R;
+ } else if (g_strcmp0(tokens[1], "write") == 0) {
+ rw = QEMU_PLUGIN_MEM_W;
+ } else {
+ fprintf(stderr, "invalid value for track: %s\n", tokens[1]);
+ return -1;
+ }
+ } else if (g_strcmp0(tokens[0], "pattern") == 0) {
+ if (!qemu_plugin_bool_parse(tokens[0], tokens[1], &pattern)) {
+ fprintf(stderr, "boolean argument parsing failed: %s\n", opt);
+ return -1;
+ }
+ } else if (g_strcmp0(tokens[0], "source") == 0) {
+ if (!qemu_plugin_bool_parse(tokens[0], tokens[1], &source)) {
+ fprintf(stderr, "boolean argument parsing failed: %s\n", opt);
+ return -1;
+ }
+ } else if (g_strcmp0(tokens[0], "match") == 0) {
check_match = true;
- matches = g_strsplit(parts[1], ",", -1);
- g_strfreev(parts);
+ g_string_append_printf(matches_raw, "%s,", tokens[1]);
} else {
fprintf(stderr, "option parsing failed: %s\n", opt);
return -1;
}
}
+ if (check_match) {
+ matches = g_strsplit(matches_raw->str, ",", -1);
+ }
if (source && pattern) {
fprintf(stderr, "can only currently track either source or
pattern.\n");
--
2.30.2
- [PULL 05/22] plugins: do not limit exported symbols if modules are active, (continued)
- [PULL 05/22] plugins: do not limit exported symbols if modules are active, Alex Bennée, 2021/09/03
- [PULL 08/22] docs/devel/tcg-plugins: added cores arg to cache plugin, Alex Bennée, 2021/09/03
- [PULL 06/22] plugins/cache: supported multicore cache modelling, Alex Bennée, 2021/09/03
- [PULL 15/22] plugins/howvec: adapting to the new argument passing scheme, Alex Bennée, 2021/09/03
- [PULL 12/22] plugins/hotblocks: Added correct boolean argument parsing, Alex Bennée, 2021/09/03
- [PULL 19/22] tests/plugins/mem: introduce "track" arg and make args not positional, Alex Bennée, 2021/09/03
- [PULL 17/22] tests/plugins/bb: adapt to the new arg passing scheme, Alex Bennée, 2021/09/03
- [PULL 20/22] tests/plugins/syscalls: adhere to new arg-passing scheme, Alex Bennée, 2021/09/03
- [PULL 22/22] docs/devel: be consistent about example plugin names, Alex Bennée, 2021/09/03
- [PULL 10/22] plugins/api: added a boolean parsing plugin api, Alex Bennée, 2021/09/03
- [PULL 14/22] plugins/hwprofile: adapt to the new plugin arguments scheme,
Alex Bennée <=
- [PULL 13/22] plugins/lockstep: make socket path not positional & parse bool arg, Alex Bennée, 2021/09/03
- [PULL 18/22] tests/plugins/insn: made arg inline not positional and parse it as bool, Alex Bennée, 2021/09/03
- [PULL 16/22] docs/tcg-plugins: new passing parameters scheme for cache docs, Alex Bennée, 2021/09/03
- [PULL 21/22] docs/deprecated: deprecate passing plugin args through `arg=`, Alex Bennée, 2021/09/03
- Re: [PULL 00/22] testing and plugin updates, Peter Maydell, 2021/09/04