Add stack metrics to greentea

Update greentea to report thread information when a thread exits or
is terminated and when testing completes. Also move metrics into
a dedicated greentea file.

features/frameworks/greentea-client/greentea-client/greentea_metrics.h

@@ -0,0 +1,14 @@
+#ifndef GREENTEA_METRICS_H
+#define GREENTEA_METRICS_H
+
+/**
+ *  Setup platform specific metrics
+ */
+void greentea_metrics_setup(void);
+
+/**
+ *  Report and cleanup platform specifc metrics
+ */
+void greentea_metrics_report(void);
+
+#endif

features/frameworks/greentea-client/source/greentea_metrics.cpp

@@ -0,0 +1,207 @@
+/*
+ * Copyright (c) 2013-2016, ARM Limited, All Rights Reserved
+ * SPDX-License-Identifier: Apache-2.0
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License"); you may
+ * not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
+ * WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+#include "mbed.h"
+#include "rtos.h"
+#include "mbed_stats.h"
+#include "cmsis_os.h"
+#include "greentea-client/test_env.h"
+#include "greentea-client/greentea_metrics.h"
+#include "SingletonPtr.h"
+#include "CircularBuffer.h"
+
+#define THREAD_BUF_COUNT    16
+
+typedef struct {
+    uint32_t entry;
+    uint32_t arg;
+    uint32_t stack_size;
+    uint32_t max_stack;
+} thread_info_t;
+
+// Mutex to protect "buf"
+SingletonPtr<Mutex> mutex;
+static char buf[128];
+static SingletonPtr<CircularBuffer<thread_info_t, THREAD_BUF_COUNT> > queue;
+
+static void send_heap_info(void);
+static void send_stack_info(void);
+static void on_thread_terminate(osThreadId id);
+static void enqeue_thread_info(osThreadId id);
+static void deque_and_print_thread_info(void);
+
+// sprintf uses a lot of stack so use these instead
+static uint32_t print_hex(char *buf, uint32_t value);
+static uint32_t print_dec(char *buf, uint32_t value);
+
+void greentea_metrics_setup()
+{
+#if defined(MBED_STACK_STATS_ENABLED) && MBED_STACK_STATS_ENABLED
+    Thread::attach_terminate_hook(on_thread_terminate);
+#endif
+}
+
+void greentea_metrics_report()
+{
+    send_heap_info();
+#if defined(MBED_STACK_STATS_ENABLED) && MBED_STACK_STATS_ENABLED
+    send_stack_info();
+    Thread::attach_terminate_hook(NULL);
+#endif
+}
+
+static void send_heap_info()
+{
+    mbed_stats_heap_t heap_stats;
+    mbed_stats_heap_get(&heap_stats);
+    greentea_send_kv("max_heap_usage",heap_stats.max_size);
+}
+
+MBED_UNUSED static void send_stack_info()
+{
+    mutex->lock();
+
+    // Flush any queued stack entries
+    while (!queue->empty()) {
+        deque_and_print_thread_info();
+    }
+
+    // Print info for all other threads
+    osThreadEnumId enum_id = osThreadsEnumStart();
+    while (true) {
+        osThreadId thread_id = osThreadEnumNext(enum_id);
+        if (NULL == thread_id) {
+            // End of enumeration
+            break;
+        }
+        enqeue_thread_info(thread_id);
+        deque_and_print_thread_info();
+    }
+    osThreadEnumFree(enum_id);
+
+    mutex->unlock();
+}
+
+MBED_UNUSED static void on_thread_terminate(osThreadId id)
+{
+    mutex->lock();
+
+    // There should always be space in the queue
+    enqeue_thread_info(id);
+
+    // If queue is full then print out a single entry
+    if (queue->full()) {
+        deque_and_print_thread_info();
+    }
+
+    mutex->unlock();
+}
+
+static void enqeue_thread_info(osThreadId id)
+{
+    osEvent info;
+    thread_info_t thread_info = {};
+    info = osThreadGetInfo(id, osThreadInfoEntry);
+    if (info.status != osOK) {
+        return;
+    }
+    thread_info.entry = (uint32_t)info.value.p;
+    info = osThreadGetInfo(id, osThreadInfoArg);
+    if (info.status != osOK) {
+        return;
+    }
+    thread_info.arg = (uint32_t)info.value.p;
+    info = osThreadGetInfo(id, osThreadInfoStackSize);
+    if (info.status != osOK) {
+        return;
+    }
+    thread_info.stack_size = (uint32_t)info.value.v;
+    info = osThreadGetInfo(id, osThreadInfoStackMax);
+    if (info.status != osOK) {
+        return;
+    }
+    thread_info.max_stack = (uint32_t)info.value.v;
+    queue->push(thread_info);
+}
+
+static void deque_and_print_thread_info()
+{
+    thread_info_t thread_info;
+    bool ret = queue->pop(thread_info);
+    MBED_ASSERT(ret);
+    uint32_t pos = 0;
+    buf[pos++] = '\"';
+    pos += print_hex(buf + pos, thread_info.entry);
+    buf[pos++] = '-';
+    pos += print_hex(buf + pos, thread_info.arg);
+    buf[pos++] = '\"';
+    buf[pos++] = ',';
+    pos += print_dec(buf + pos, thread_info.max_stack);
+    buf[pos++] = ',';
+    pos += print_dec(buf + pos, thread_info.stack_size);
+    buf[pos++] = 0;
+    greentea_send_kv("__thread_info", buf);
+}
+
+static uint32_t print_hex(char *buf, uint32_t value)
+{
+    uint32_t pos = 0;
+    buf[pos] = '0';
+    pos++;
+    buf[pos] = 'x';
+    pos++;
+    for (int i = 8; i >= 0; i--) {
+        uint32_t val = (value >> (4 * i)) & 0xF;
+        if (val <= 9) {
+            buf[pos] = '0' + val;
+            pos++;
+        } else {
+            buf[pos] = 'a' + val - 10;
+            pos++;
+        }
+    }
+    return pos;
+}
+
+static uint32_t print_dec(char *buf, uint32_t value)
+{
+    uint32_t pos = 0;
+
+    // The value 0 is special case
+    if (0 == value) {
+        buf[pos] = '0';
+        pos++;
+        return pos;
+    }
+
+    // Write out value in reverse order
+    while (value != 0) {
+        uint32_t next = value / 10;
+        buf[pos] = '0' + (value - next * 10);
+        value = next;
+        pos++;
+    }
+
+    // Reverse order
+    for (uint32_t i = 0; i < pos / 2; i++) {
+        char temp = buf[i];
+        buf[i] = buf[pos - 1 - i];
+        buf[pos - 1 - i] = temp;
+    }
+
+    return pos;
+}

features/frameworks/greentea-client/source/test_env.cpp

@@ -21,6 +21,7 @@
 #include "mbed.h"
 #include "greentea-client/test_env.h"
 #include "greentea-client/greentea_serial.h"
+#include "greentea-client/greentea_metrics.h"
 
 
 /**
@@ -65,6 +66,7 @@ static void greentea_notify_version();
  *           This function is blocking.
  */
 void GREENTEA_SETUP(const int timeout, const char *host_test_name) {
+    greentea_metrics_setup();
     // Key-value protocol handshake function. Waits for {{__sync;...}} message
     // Sync preamble: "{{__sync;0dad4a9d-59a3-4aec-810d-d5fb09d852c1}}"
     // Example value of sync_uuid == "0dad4a9d-59a3-4aec-810d-d5fb09d852c1"
@@ -451,6 +453,7 @@ static void greentea_notify_completion(const int result) {
     __gcov_flush();
     coverage_report = false;
 #endif
+    greentea_metrics_report();
     greentea_send_kv(GREENTEA_TEST_ENV_END, val);
     greentea_send_kv(GREENTEA_TEST_ENV_EXIT, 0);
 }

features/frameworks/utest/source/utest_greentea_handlers.cpp

@@ -21,7 +21,6 @@
 #include "greentea-client/test_env.h"
 #include "utest/utest_stack_trace.h"
 #include "utest/utest_serial.h"
-#include "mbed_stats.h"
 
 using namespace utest::v1;
 
@@ -106,10 +105,7 @@ utest::v1::status_t utest::v1::greentea_test_setup_handler(const size_t number_o
 void utest::v1::greentea_test_teardown_handler(const size_t passed, const size_t failed, const failure_t failure)
 {
     UTEST_LOG_FUNCTION();
-    mbed_stats_heap_t heap_stats;
     verbose_test_teardown_handler(passed, failed, failure);
-    mbed_stats_heap_get(&heap_stats);
-    greentea_send_kv("max_heap_usage",heap_stats.max_size);
     greentea_send_kv(TEST_ENV_TESTCASE_SUMMARY, passed, failed);
     int result = !(failed || (failure.reason && !(failure.reason & REASON_IGNORE)));
     GREENTEA_TESTSUITE_RESULT(result);