Initial checkin of gRPC to third_party/

third_party/grpc/test/core/iomgr/endpoint_tests.c

Index: third_party/grpc/test/core/iomgr/endpoint_tests.c
diff --git a/third_party/grpc/test/core/iomgr/endpoint_tests.c b/third_party/grpc/test/core/iomgr/endpoint_tests.c
new file mode 100644
index 0000000000000000000000000000000000000000..f689e4ba7fb336daf3c40c68e44b4148436930ca
--- /dev/null
+++ b/third_party/grpc/test/core/iomgr/endpoint_tests.c
@@ -0,0 +1,266 @@
+/*
+ *
+ * Copyright 2015-2016, Google Inc.
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions are
+ * met:
+ *
+ *     * Redistributions of source code must retain the above copyright
+ * notice, this list of conditions and the following disclaimer.
+ *     * Redistributions in binary form must reproduce the above
+ * copyright notice, this list of conditions and the following disclaimer
+ * in the documentation and/or other materials provided with the
+ * distribution.
+ *     * Neither the name of Google Inc. nor the names of its
+ * contributors may be used to endorse or promote products derived from
+ * this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+ * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+ * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+ * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+ * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+ * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+ * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+ * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+ * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+ * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ *
+ */
+
+#include "test/core/iomgr/endpoint_tests.h"
+
+#include <sys/types.h>
+
+#include <grpc/support/alloc.h>
+#include <grpc/support/log.h>
+#include <grpc/support/slice.h>
+#include <grpc/support/time.h>
+#include <grpc/support/useful.h>
+#include "test/core/util/test_config.h"
+
+/*
+   General test notes:
+
+   All tests which write data into an endpoint write i%256 into byte i, which
+   is verified by readers.
+
+   In general there are a few interesting things to vary which may lead to
+   exercising different codepaths in an implementation:
+   1. Total amount of data written to the endpoint
+   2. Size of slice allocations
+   3. Amount of data we read from or write to the endpoint at once
+
+   The tests here tend to parameterize these where applicable.
+
+*/
+
+static gpr_mu *g_mu;
+static grpc_pollset *g_pollset;
+
+size_t count_slices(gpr_slice *slices, size_t nslices, int *current_data) {
+  size_t num_bytes = 0;
+  size_t i;
+  size_t j;
+  unsigned char *buf;
+  for (i = 0; i < nslices; ++i) {
+    buf = GPR_SLICE_START_PTR(slices[i]);
+    for (j = 0; j < GPR_SLICE_LENGTH(slices[i]); ++j) {
+      GPR_ASSERT(buf[j] == *current_data);
+      *current_data = (*current_data + 1) % 256;
+    }
+    num_bytes += GPR_SLICE_LENGTH(slices[i]);
+  }
+  return num_bytes;
+}
+
+static grpc_endpoint_test_fixture begin_test(grpc_endpoint_test_config config,
+                                             const char *test_name,
+                                             size_t slice_size) {
+  gpr_log(GPR_INFO, "%s/%s", test_name, config.name);
+  return config.create_fixture(slice_size);
+}
+
+static void end_test(grpc_endpoint_test_config config) { config.clean_up(); }
+
+static gpr_slice *allocate_blocks(size_t num_bytes, size_t slice_size,
+                                  size_t *num_blocks, uint8_t *current_data) {
+  size_t nslices = num_bytes / slice_size + (num_bytes % slice_size ? 1 : 0);
+  gpr_slice *slices = malloc(sizeof(gpr_slice) * nslices);
+  size_t num_bytes_left = num_bytes;
+  size_t i;
+  size_t j;
+  unsigned char *buf;
+  *num_blocks = nslices;
+
+  for (i = 0; i < nslices; ++i) {
+    slices[i] = gpr_slice_malloc(slice_size > num_bytes_left ? num_bytes_left
+                                                             : slice_size);
+    num_bytes_left -= GPR_SLICE_LENGTH(slices[i]);
+    buf = GPR_SLICE_START_PTR(slices[i]);
+    for (j = 0; j < GPR_SLICE_LENGTH(slices[i]); ++j) {
+      buf[j] = *current_data;
+      (*current_data)++;
+    }
+  }
+  GPR_ASSERT(num_bytes_left == 0);
+  return slices;
+}
+
+struct read_and_write_test_state {
+  grpc_endpoint *read_ep;
+  grpc_endpoint *write_ep;
+  size_t target_bytes;
+  size_t bytes_read;
+  size_t current_write_size;
+  size_t bytes_written;
+  int current_read_data;
+  uint8_t current_write_data;
+  int read_done;
+  int write_done;
+  gpr_slice_buffer incoming;
+  gpr_slice_buffer outgoing;
+  grpc_closure done_read;
+  grpc_closure done_write;
+};
+
+static void read_and_write_test_read_handler(grpc_exec_ctx *exec_ctx,
+                                             void *data, bool success) {
+  struct read_and_write_test_state *state = data;
+
+  state->bytes_read += count_slices(
+      state->incoming.slices, state->incoming.count, &state->current_read_data);
+  if (state->bytes_read == state->target_bytes || !success) {
+    gpr_log(GPR_INFO, "Read handler done");
+    gpr_mu_lock(g_mu);
+    state->read_done = 1 + success;
+    grpc_pollset_kick(g_pollset, NULL);
+    gpr_mu_unlock(g_mu);
+  } else if (success) {
+    grpc_endpoint_read(exec_ctx, state->read_ep, &state->incoming,
+                       &state->done_read);
+  }
+}
+
+static void read_and_write_test_write_handler(grpc_exec_ctx *exec_ctx,
+                                              void *data, bool success) {
+  struct read_and_write_test_state *state = data;
+  gpr_slice *slices = NULL;
+  size_t nslices;
+
+  if (success) {
+    state->bytes_written += state->current_write_size;
+    if (state->target_bytes - state->bytes_written <
+        state->current_write_size) {
+      state->current_write_size = state->target_bytes - state->bytes_written;
+    }
+    if (state->current_write_size != 0) {
+      slices = allocate_blocks(state->current_write_size, 8192, &nslices,
+                               &state->current_write_data);
+      gpr_slice_buffer_reset_and_unref(&state->outgoing);
+      gpr_slice_buffer_addn(&state->outgoing, slices, nslices);
+      grpc_endpoint_write(exec_ctx, state->write_ep, &state->outgoing,
+                          &state->done_write);
+      free(slices);
+      return;
+    }
+  }
+
+  gpr_log(GPR_INFO, "Write handler done");
+  gpr_mu_lock(g_mu);
+  state->write_done = 1 + success;
+  grpc_pollset_kick(g_pollset, NULL);
+  gpr_mu_unlock(g_mu);
+}
+
+/* Do both reading and writing using the grpc_endpoint API.
+
+   This also includes a test of the shutdown behavior.
+ */
+static void read_and_write_test(grpc_endpoint_test_config config,
+                                size_t num_bytes, size_t write_size,
+                                size_t slice_size, int shutdown) {
+  struct read_and_write_test_state state;
+  gpr_timespec deadline = GRPC_TIMEOUT_SECONDS_TO_DEADLINE(20);
+  grpc_endpoint_test_fixture f =
+      begin_test(config, "read_and_write_test", slice_size);
+  grpc_exec_ctx exec_ctx = GRPC_EXEC_CTX_INIT;
+  gpr_log(GPR_DEBUG, "num_bytes=%d write_size=%d slice_size=%d shutdown=%d",
+          num_bytes, write_size, slice_size, shutdown);
+
+  if (shutdown) {
+    gpr_log(GPR_INFO, "Start read and write shutdown test");
+  } else {
+    gpr_log(GPR_INFO, "Start read and write test with %d bytes, slice size %d",
+            num_bytes, slice_size);
+  }
+
+  state.read_ep = f.client_ep;
+  state.write_ep = f.server_ep;
+  state.target_bytes = num_bytes;
+  state.bytes_read = 0;
+  state.current_write_size = write_size;
+  state.bytes_written = 0;
+  state.read_done = 0;
+  state.write_done = 0;
+  state.current_read_data = 0;
+  state.current_write_data = 0;
+  grpc_closure_init(&state.done_read, read_and_write_test_read_handler, &state);
+  grpc_closure_init(&state.done_write, read_and_write_test_write_handler,
+                    &state);
+  gpr_slice_buffer_init(&state.outgoing);
+  gpr_slice_buffer_init(&state.incoming);
+
+  /* Get started by pretending an initial write completed */
+  /* NOTE: Sets up initial conditions so we can have the same write handler
+     for the first iteration as for later iterations. It does the right thing
+     even when bytes_written is unsigned. */
+  state.bytes_written -= state.current_write_size;
+  read_and_write_test_write_handler(&exec_ctx, &state, 1);
+  grpc_exec_ctx_finish(&exec_ctx);
+
+  grpc_endpoint_read(&exec_ctx, state.read_ep, &state.incoming,
+                     &state.done_read);
+
+  if (shutdown) {
+    gpr_log(GPR_DEBUG, "shutdown read");
+    grpc_endpoint_shutdown(&exec_ctx, state.read_ep);
+    gpr_log(GPR_DEBUG, "shutdown write");
+    grpc_endpoint_shutdown(&exec_ctx, state.write_ep);
+  }
+  grpc_exec_ctx_finish(&exec_ctx);
+
+  gpr_mu_lock(g_mu);
+  while (!state.read_done || !state.write_done) {
+    grpc_pollset_worker *worker = NULL;
+    GPR_ASSERT(gpr_time_cmp(gpr_now(GPR_CLOCK_MONOTONIC), deadline) < 0);
+    grpc_pollset_work(&exec_ctx, g_pollset, &worker,
+                      gpr_now(GPR_CLOCK_MONOTONIC), deadline);
+  }
+  gpr_mu_unlock(g_mu);
+  grpc_exec_ctx_finish(&exec_ctx);
+
+  end_test(config);
+  gpr_slice_buffer_destroy(&state.outgoing);
+  gpr_slice_buffer_destroy(&state.incoming);
+  grpc_endpoint_destroy(&exec_ctx, state.read_ep);
+  grpc_endpoint_destroy(&exec_ctx, state.write_ep);
+  grpc_exec_ctx_finish(&exec_ctx);
+}
+
+void grpc_endpoint_tests(grpc_endpoint_test_config config,
+                         grpc_pollset *pollset, gpr_mu *mu) {
+  size_t i;
+  g_pollset = pollset;
+  g_mu = mu;
+  read_and_write_test(config, 10000000, 100000, 8192, 0);
+  read_and_write_test(config, 1000000, 100000, 1, 0);
+  read_and_write_test(config, 100000000, 100000, 1, 1);
+  for (i = 1; i < 1000; i = GPR_MAX(i + 1, i * 5 / 4)) {
+    read_and_write_test(config, 40320, i, i, 0);
+  }
+  g_pollset = NULL;
+}