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authorEugene Tarassov2019-03-19 16:00:42 -0400
committerEugene Tarassov2019-03-19 16:00:42 -0400
commit57eabcf238179cda86194cf9a37d391e11c80914 (patch)
treedab8f41d52fece174ba2cf7f31727c3ef1336551
parentc79ef7ce5e63efc749015ad0f594ade32ff58533 (diff)
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TCF Agent: improved Context Reset service
1. added support for reset grouping other than default CONTEXT_GROUP_CPU 2. fixed handling of cache misses
-rw-r--r--agent/tcf/services/contextreset.c96
-rw-r--r--agent/tcf/services/contextreset.h7
2 files changed, 68 insertions, 35 deletions
diff --git a/agent/tcf/services/contextreset.c b/agent/tcf/services/contextreset.c
index 21a5521c..2bf83bb9 100644
--- a/agent/tcf/services/contextreset.c
+++ b/agent/tcf/services/contextreset.c
@@ -14,6 +14,7 @@
#if SERVICE_ContextReset
#include <tcf/framework/context.h>
+#include <tcf/framework/cache.h>
#include <tcf/framework/json.h>
#include <tcf/framework/myalloc.h>
#include <tcf/framework/trace.h>
@@ -27,6 +28,7 @@ typedef struct ContextExtensionReset {
ResetInfo * resets;
unsigned resets_cnt;
unsigned resets_max;
+ int group;
} ContextExtensionRS;
struct ResetInfo {
@@ -56,7 +58,6 @@ static ResetInfo * find_reset(Context * ctx, const char * type) {
void add_reset(Context * ctx, const char * type, const char * desc, ContextReset * reset) {
ContextExtensionRS * ext = EXT(ctx);
ResetInfo * ri;
- assert(ctx == context_get_group(ctx, CONTEXT_GROUP_CPU));
ri = find_reset(ctx, type);
if (ri == NULL) {
@@ -74,6 +75,17 @@ void add_reset(Context * ctx, const char * type, const char * desc, ContextReset
ri->reset = reset;
}
+void set_reset_group(Context * ctx, int group) {
+ ContextExtensionRS * ext = EXT(ctx);
+ ext->group = group;
+}
+
+static Context * get_reset_context(Context * ctx) {
+ ContextExtensionRS * ext = EXT(ctx);
+ if (ext->group > 0) return context_get_group(ctx, ext->group);
+ return context_get_group(ctx, CONTEXT_GROUP_CPU);
+}
+
static void command_get_capabilities(char * token, Channel * c) {
char id[256];
Context * ctx;
@@ -93,8 +105,8 @@ static void command_get_capabilities(char * token, Channel * c) {
write_errno(out, err);
write_stream(out, '[');
if (!err) {
- ContextExtensionRS * ext = EXT(context_get_group(ctx, CONTEXT_GROUP_CPU));
unsigned i;
+ ContextExtensionRS * ext = EXT(get_reset_context(ctx));
for (i = 0; i < ext->resets_cnt; i++) {
ResetInfo * ri = ext->resets + i;
if (i > 0) write_stream(&c->out, ',');
@@ -114,6 +126,46 @@ static void command_get_capabilities(char * token, Channel * c) {
write_stream(out, MARKER_EOM);
}
+typedef struct CommandResetArgs {
+ char token[256];
+ char id[256];
+ char type[256];
+ ResetParams params;
+} CommandResetArgs;
+
+static void command_reset_cache_client(void * x) {
+ CommandResetArgs * args = (CommandResetArgs *)x;
+ Channel * c = cache_channel();
+ Context * ctx = id2ctx(args->id);
+ OutputStream * out = &c->out;
+ int err = 0;
+
+ if (ctx == NULL) err = ERR_INV_CONTEXT;
+ else if (ctx->exited) err = ERR_ALREADY_EXITED;
+
+ if (!err) {
+ Context * grp = get_reset_context(ctx);
+ ResetInfo * rst = find_reset(grp, args->type);
+ if (rst == NULL) err = set_errno(ERR_OTHER, "Unsupported reset type");
+ else if (rst->reset(ctx, &args->params) < 0) err = errno;
+ }
+
+ cache_exit();
+
+ while (args->params.list != NULL) {
+ ResetParameter * p = args->params.list;
+ args->params.list = p->next;
+ loc_free(p->name);
+ loc_free(p->value);
+ loc_free(p);
+ }
+
+ write_stringz(out, "R");
+ write_stringz(out, args->token);
+ write_errno(out, err);
+ write_stream(out, MARKER_EOM);
+}
+
static void read_reset_params(InputStream * inp, const char * name, void * x) {
ResetParams * params = (ResetParams *)x;
@@ -130,45 +182,19 @@ static void read_reset_params(InputStream * inp, const char * name, void * x) {
}
static void command_reset(char * token, Channel * c) {
- char id[256];
- char type[256];
- Context * ctx;
- OutputStream * out = &c->out;
- ResetParams params;
- int err = 0;
+ CommandResetArgs args;
- memset(&params, 0, sizeof(params));
- json_read_string(&c->inp, id, sizeof(id));
+ memset(&args, 0, sizeof(args));
+ json_read_string(&c->inp, args.id, sizeof(args.id));
json_test_char(&c->inp, MARKER_EOA);
- json_read_string(&c->inp, type, sizeof(type));
+ json_read_string(&c->inp, args.type, sizeof(args.type));
json_test_char(&c->inp, MARKER_EOA);
- json_read_struct(&c->inp, read_reset_params, &params);
+ json_read_struct(&c->inp, read_reset_params, &args.params);
json_test_char(&c->inp, MARKER_EOA);
json_test_char(&c->inp, MARKER_EOM);
- ctx = id2ctx(id);
- if (ctx == NULL) err = ERR_INV_CONTEXT;
- else if (ctx->exited) err = ERR_ALREADY_EXITED;
-
- write_stringz(out, "R");
- write_stringz(out, token);
- if (!err) {
- Context * cpu = context_get_group(ctx, CONTEXT_GROUP_CPU);
- ResetInfo * rst = find_reset(cpu, type);
- if (rst == NULL) err = set_errno(ERR_OTHER, "Unsupported reset type");
- else if (rst->reset(ctx, &params) < 0) err = errno;
- }
- while (params.list != NULL) {
- ResetParameter * p = params.list;
- params.list = p->next;
- loc_free(p->name);
- loc_free(p->value);
- loc_free(p);
- }
-
- write_errno(out, err);
- write_stream(out, 0);
- write_stream(out, MARKER_EOM);
+ strlcpy(args.token, token, sizeof(args.token));
+ cache_enter(command_reset_cache_client, c, &args, sizeof(args));
}
static void event_context_disposed(Context * ctx, void * args) {
diff --git a/agent/tcf/services/contextreset.h b/agent/tcf/services/contextreset.h
index eb16d04c..7b67336a 100644
--- a/agent/tcf/services/contextreset.h
+++ b/agent/tcf/services/contextreset.h
@@ -31,8 +31,15 @@ typedef struct ResetParams {
/* Reset callback. */
typedef int ContextReset(Context * /* ctx */, const ResetParams * /* params */);
+/* Register reset callback function for a context */
extern void add_reset(Context * ctx, const char * type, const char * desc, ContextReset * reset);
+/*
+ * Set reset group of a context .
+ * By default, a reset function is shared by members of CONTEXT_GROUP_CPU.
+ */
+extern void set_reset_group(Context * ctx, int group);
+
extern void ini_context_reset_service(Protocol * proto);
#endif /* D_contextreset */

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