diff --git a/src/core/iomgr/tcp_server_posix.c b/src/core/iomgr/tcp_server_posix.c
index 74ee68a6f11..413f7867be2 100644
--- a/src/core/iomgr/tcp_server_posix.c
+++ b/src/core/iomgr/tcp_server_posix.c
@@ -451,7 +451,7 @@ int grpc_tcp_server_add_port(grpc_tcp_server *s, const void *addr,
                            &sockname_len)) {
         port = grpc_sockaddr_get_port((struct sockaddr *)&sockname_temp);
         if (port > 0) {
-          allocated_addr = malloc(addr_len);
+          allocated_addr = gpr_malloc(addr_len);
           memcpy(allocated_addr, addr, addr_len);
           grpc_sockaddr_set_port(allocated_addr, port);
           addr = allocated_addr;
diff --git a/src/core/iomgr/tcp_server_windows.c b/src/core/iomgr/tcp_server_windows.c
index a4abc5b9743..f9def9a19bb 100644
--- a/src/core/iomgr/tcp_server_windows.c
+++ b/src/core/iomgr/tcp_server_windows.c
@@ -467,7 +467,7 @@ int grpc_tcp_server_add_port(grpc_tcp_server *s, const void *addr,
                            (struct sockaddr *)&sockname_temp, &sockname_len)) {
         port = grpc_sockaddr_get_port((struct sockaddr *)&sockname_temp);
         if (port > 0) {
-          allocated_addr = malloc(addr_len);
+          allocated_addr = gpr_malloc(addr_len);
           memcpy(allocated_addr, addr, addr_len);
           grpc_sockaddr_set_port(allocated_addr, port);
           addr = allocated_addr;
diff --git a/src/core/iomgr/udp_server.c b/src/core/iomgr/udp_server.c
index 174159170f3..15f3802dddc 100644
--- a/src/core/iomgr/udp_server.c
+++ b/src/core/iomgr/udp_server.c
@@ -337,7 +337,7 @@ int grpc_udp_server_add_port(grpc_udp_server *s, const void *addr,
                            &sockname_len)) {
         port = grpc_sockaddr_get_port((struct sockaddr *)&sockname_temp);
         if (port > 0) {
-          allocated_addr = malloc(addr_len);
+          allocated_addr = gpr_malloc(addr_len);
           memcpy(allocated_addr, addr, addr_len);
           grpc_sockaddr_set_port(allocated_addr, port);
           addr = allocated_addr;
diff --git a/src/core/profiling/basic_timers.c b/src/core/profiling/basic_timers.c
index 3067f52c219..3c9557ab895 100644
--- a/src/core/profiling/basic_timers.c
+++ b/src/core/profiling/basic_timers.c
@@ -173,7 +173,7 @@ static void flush_logs(gpr_timer_log_list *list) {
   gpr_timer_log *log;
   while ((log = timer_log_pop_front(list)) != NULL) {
     write_log(log);
-    free(log);
+    gpr_free(log);
   }
 }
 
@@ -208,7 +208,7 @@ static void init_output() {
 }
 
 static void rotate_log() {
-  gpr_timer_log *new = malloc(sizeof(*new));
+  gpr_timer_log *new = gpr_malloc(sizeof(*new));
   gpr_once_init(&g_once_init, init_output);
   new->num_entries = 0;
   pthread_mutex_lock(&g_mu);
diff --git a/src/core/support/thd_posix.c b/src/core/support/thd_posix.c
index 4d874d36566..1c703844b4d 100644
--- a/src/core/support/thd_posix.c
+++ b/src/core/support/thd_posix.c
@@ -81,6 +81,7 @@ int gpr_thd_new(gpr_thd_id *t, void (*thd_body)(void *arg), void *arg,
   thread_started = (pthread_create(&p, &attr, &thread_body, a) == 0);
   GPR_ASSERT(pthread_attr_destroy(&attr) == 0);
   if (!thread_started) {
+    /* don't use gpr_free, as this was allocated using malloc (see above) */
     free(a);
   }
   *t = (gpr_thd_id)p;
diff --git a/src/core/surface/byte_buffer.c b/src/core/surface/byte_buffer.c
index fb39c4531d9..a093a37af32 100644
--- a/src/core/surface/byte_buffer.c
+++ b/src/core/surface/byte_buffer.c
@@ -44,7 +44,7 @@ grpc_byte_buffer *grpc_raw_byte_buffer_create(gpr_slice *slices,
 grpc_byte_buffer *grpc_raw_compressed_byte_buffer_create(
     gpr_slice *slices, size_t nslices, grpc_compression_algorithm compression) {
   size_t i;
-  grpc_byte_buffer *bb = malloc(sizeof(grpc_byte_buffer));
+  grpc_byte_buffer *bb = gpr_malloc(sizeof(grpc_byte_buffer));
   bb->type = GRPC_BB_RAW;
   bb->data.raw.compression = compression;
   gpr_slice_buffer_init(&bb->data.raw.slice_buffer);
@@ -57,7 +57,7 @@ grpc_byte_buffer *grpc_raw_compressed_byte_buffer_create(
 
 grpc_byte_buffer *grpc_raw_byte_buffer_from_reader(
     grpc_byte_buffer_reader *reader) {
-  grpc_byte_buffer *bb = malloc(sizeof(grpc_byte_buffer));
+  grpc_byte_buffer *bb = gpr_malloc(sizeof(grpc_byte_buffer));
   gpr_slice slice;
   bb->type = GRPC_BB_RAW;
   bb->data.raw.compression = GRPC_COMPRESS_NONE;
@@ -85,7 +85,7 @@ void grpc_byte_buffer_destroy(grpc_byte_buffer *bb) {
       gpr_slice_buffer_destroy(&bb->data.raw.slice_buffer);
       break;
   }
-  free(bb);
+  gpr_free(bb);
 }
 
 size_t grpc_byte_buffer_length(grpc_byte_buffer *bb) {
diff --git a/src/core/tsi/fake_transport_security.c b/src/core/tsi/fake_transport_security.c
index c0106f7a33c..86ffa6b83be 100644
--- a/src/core/tsi/fake_transport_security.c
+++ b/src/core/tsi/fake_transport_security.c
@@ -134,12 +134,12 @@ static void tsi_fake_frame_reset(tsi_fake_frame *frame, int needs_draining) {
 static int tsi_fake_frame_ensure_size(tsi_fake_frame *frame) {
   if (frame->data == NULL) {
     frame->allocated_size = frame->size;
-    frame->data = malloc(frame->allocated_size);
+    frame->data = gpr_malloc(frame->allocated_size);
     if (frame->data == NULL) return 0;
   } else if (frame->size > frame->allocated_size) {
     unsigned char *new_data = realloc(frame->data, frame->size);
     if (new_data == NULL) {
-      free(frame->data);
+      gpr_free(frame->data);
       frame->data = NULL;
       return 0;
     }
@@ -160,7 +160,7 @@ static tsi_result fill_frame_from_bytes(const unsigned char *incoming_bytes,
   if (frame->needs_draining) return TSI_INTERNAL_ERROR;
   if (frame->data == NULL) {
     frame->allocated_size = TSI_FAKE_FRAME_INITIAL_ALLOCATED_SIZE;
-    frame->data = malloc(frame->allocated_size);
+    frame->data = gpr_malloc(frame->allocated_size);
     if (frame->data == NULL) return TSI_OUT_OF_RESOURCES;
   }
 
@@ -226,7 +226,7 @@ static tsi_result bytes_to_frame(unsigned char *bytes, size_t bytes_size,
 }
 
 static void tsi_fake_frame_destruct(tsi_fake_frame *frame) {
-  if (frame->data != NULL) free(frame->data);
+  if (frame->data != NULL) gpr_free(frame->data);
 }
 
 /* --- tsi_frame_protector methods implementation. ---*/
@@ -366,7 +366,7 @@ static void fake_protector_destroy(tsi_frame_protector *self) {
   tsi_fake_frame_protector *impl = (tsi_fake_frame_protector *)self;
   tsi_fake_frame_destruct(&impl->protect_frame);
   tsi_fake_frame_destruct(&impl->unprotect_frame);
-  free(self);
+  gpr_free(self);
 }
 
 static const tsi_frame_protector_vtable frame_protector_vtable = {
@@ -488,7 +488,7 @@ static void fake_handshaker_destroy(tsi_handshaker *self) {
   tsi_fake_handshaker *impl = (tsi_fake_handshaker *)self;
   tsi_fake_frame_destruct(&impl->incoming);
   tsi_fake_frame_destruct(&impl->outgoing);
-  free(self);
+  gpr_free(self);
 }
 
 static const tsi_handshaker_vtable handshaker_vtable = {
diff --git a/src/core/tsi/ssl_transport_security.c b/src/core/tsi/ssl_transport_security.c
index 8df582609b9..acf1b0e3c1d 100644
--- a/src/core/tsi/ssl_transport_security.c
+++ b/src/core/tsi/ssl_transport_security.c
@@ -148,8 +148,7 @@ static void init_openssl(void) {
   OpenSSL_add_all_algorithms();
   num_locks = CRYPTO_num_locks();
   GPR_ASSERT(num_locks > 0);
-  openssl_mutexes = malloc((size_t)num_locks * sizeof(gpr_mu));
-  GPR_ASSERT(openssl_mutexes != NULL);
+  openssl_mutexes = gpr_malloc((size_t)num_locks * sizeof(gpr_mu));
   for (i = 0; i < CRYPTO_num_locks(); i++) {
     gpr_mu_init(&openssl_mutexes[i]);
   }
@@ -701,7 +700,7 @@ static tsi_result build_alpn_protocol_name_list(
     }
     *protocol_name_list_length += (size_t)alpn_protocols_lengths[i] + 1;
   }
-  *protocol_name_list = malloc(*protocol_name_list_length);
+  *protocol_name_list = gpr_malloc(*protocol_name_list_length);
   if (*protocol_name_list == NULL) return TSI_OUT_OF_RESOURCES;
   current = *protocol_name_list;
   for (i = 0; i < num_alpn_protocols; i++) {
@@ -852,9 +851,9 @@ static tsi_result ssl_protector_unprotect(
 
 static void ssl_protector_destroy(tsi_frame_protector *self) {
   tsi_ssl_frame_protector *impl = (tsi_ssl_frame_protector *)self;
-  if (impl->buffer != NULL) free(impl->buffer);
+  if (impl->buffer != NULL) gpr_free(impl->buffer);
   if (impl->ssl != NULL) SSL_free(impl->ssl);
-  free(self);
+  gpr_free(self);
 }
 
 static const tsi_frame_protector_vtable frame_protector_vtable = {
@@ -966,8 +965,8 @@ static tsi_result ssl_handshaker_extract_peer(tsi_handshaker *self,
   if (alpn_selected != NULL) {
     size_t i;
     tsi_peer_property *new_properties =
-        calloc(1, sizeof(tsi_peer_property) * (peer->property_count + 1));
-    if (new_properties == NULL) return TSI_OUT_OF_RESOURCES;
+        gpr_malloc(sizeof(*new_properties) * (peer->property_count + 1));
+    memset(new_properties, 0, sizeof(*new_properties) * (peer->property_count + 1));
     for (i = 0; i < peer->property_count; i++) {
       new_properties[i] = peer->properties[i];
     }
@@ -975,10 +974,10 @@ static tsi_result ssl_handshaker_extract_peer(tsi_handshaker *self,
         TSI_SSL_ALPN_SELECTED_PROTOCOL, (const char *)alpn_selected,
         alpn_selected_len, &new_properties[peer->property_count]);
     if (result != TSI_OK) {
-      free(new_properties);
+      gpr_free(new_properties);
       return result;
     }
-    if (peer->properties != NULL) free(peer->properties);
+    if (peer->properties != NULL) gpr_free(peer->properties);
     peer->property_count++;
     peer->properties = new_properties;
   }
@@ -992,10 +991,8 @@ static tsi_result ssl_handshaker_create_frame_protector(
       TSI_SSL_MAX_PROTECTED_FRAME_SIZE_UPPER_BOUND;
   tsi_ssl_handshaker *impl = (tsi_ssl_handshaker *)self;
   tsi_ssl_frame_protector *protector_impl =
-      calloc(1, sizeof(tsi_ssl_frame_protector));
-  if (protector_impl == NULL) {
-    return TSI_OUT_OF_RESOURCES;
-  }
+      gpr_malloc(sizeof(*protector_impl));
+  memset(protector_impl, 0, sizeof(*protector_impl));
 
   if (max_output_protected_frame_size != NULL) {
     if (*max_output_protected_frame_size >
@@ -1011,11 +1008,11 @@ static tsi_result ssl_handshaker_create_frame_protector(
   }
   protector_impl->buffer_size =
       actual_max_output_protected_frame_size - TSI_SSL_MAX_PROTECTION_OVERHEAD;
-  protector_impl->buffer = malloc(protector_impl->buffer_size);
+  protector_impl->buffer = gpr_malloc(protector_impl->buffer_size);
   if (protector_impl->buffer == NULL) {
     gpr_log(GPR_ERROR,
             "Could not allocated buffer for tsi_ssl_frame_protector.");
-    free(protector_impl);
+    gpr_free(protector_impl);
     return TSI_INTERNAL_ERROR;
   }
 
@@ -1034,7 +1031,7 @@ static tsi_result ssl_handshaker_create_frame_protector(
 static void ssl_handshaker_destroy(tsi_handshaker *self) {
   tsi_ssl_handshaker *impl = (tsi_ssl_handshaker *)self;
   SSL_free(impl->ssl); /* The BIO objects are owned by ssl */
-  free(impl);
+  gpr_free(impl);
 }
 
 static const tsi_handshaker_vtable handshaker_vtable = {
@@ -1111,11 +1108,8 @@ static tsi_result create_tsi_ssl_handshaker(SSL_CTX *ctx, int is_client,
     SSL_set_accept_state(ssl);
   }
 
-  impl = calloc(1, sizeof(tsi_ssl_handshaker));
-  if (impl == NULL) {
-    SSL_free(ssl);
-    return TSI_OUT_OF_RESOURCES;
-  }
+  impl = gpr_malloc(sizeof(*impl));
+  memset(impl, 0, sizeof(*impl));
   impl->ssl = ssl;
   impl->into_ssl = into_ssl;
   impl->from_ssl = from_ssl;
@@ -1167,8 +1161,8 @@ static void ssl_client_handshaker_factory_destroy(
   tsi_ssl_client_handshaker_factory *impl =
       (tsi_ssl_client_handshaker_factory *)self;
   if (impl->ssl_context != NULL) SSL_CTX_free(impl->ssl_context);
-  if (impl->alpn_protocol_list != NULL) free(impl->alpn_protocol_list);
-  free(impl);
+  if (impl->alpn_protocol_list != NULL) gpr_free(impl->alpn_protocol_list);
+  gpr_free(impl);
 }
 
 static int client_handshaker_factory_npn_callback(SSL *ssl, unsigned char **out,
@@ -1209,12 +1203,12 @@ static void ssl_server_handshaker_factory_destroy(
       tsi_peer_destruct(&impl->ssl_context_x509_subject_names[i]);
     }
   }
-  if (impl->ssl_contexts != NULL) free(impl->ssl_contexts);
+  if (impl->ssl_contexts != NULL) gpr_free(impl->ssl_contexts);
   if (impl->ssl_context_x509_subject_names != NULL) {
-    free(impl->ssl_context_x509_subject_names);
+    gpr_free(impl->ssl_context_x509_subject_names);
   }
-  if (impl->alpn_protocol_list != NULL) free(impl->alpn_protocol_list);
-  free(impl);
+  if (impl->alpn_protocol_list != NULL) gpr_free(impl->alpn_protocol_list);
+  gpr_free(impl);
 }
 
 static int does_entry_match_name(const char *entry, size_t entry_length,
@@ -1333,11 +1327,8 @@ tsi_result tsi_create_ssl_client_handshaker_factory(
     return TSI_INVALID_ARGUMENT;
   }
 
-  impl = calloc(1, sizeof(tsi_ssl_client_handshaker_factory));
-  if (impl == NULL) {
-    SSL_CTX_free(ssl_context);
-    return TSI_OUT_OF_RESOURCES;
-  }
+  impl = gpr_malloc(sizeof(*impl));
+  memset(impl, 0, sizeof(*impl));
   impl->ssl_context = ssl_context;
 
   do {
@@ -1411,14 +1402,16 @@ tsi_result tsi_create_ssl_server_handshaker_factory(
     return TSI_INVALID_ARGUMENT;
   }
 
-  impl = calloc(1, sizeof(tsi_ssl_server_handshaker_factory));
-  if (impl == NULL) return TSI_OUT_OF_RESOURCES;
+  impl = gpr_malloc(sizeof(*impl));
+  memset(impl, 0, sizeof(*impl));
   impl->base.create_handshaker =
       ssl_server_handshaker_factory_create_handshaker;
   impl->base.destroy = ssl_server_handshaker_factory_destroy;
-  impl->ssl_contexts = calloc(key_cert_pair_count, sizeof(SSL_CTX *));
+  impl->ssl_contexts = gpr_malloc(key_cert_pair_count * sizeof(SSL_CTX *));
+  memset(impl->ssl_contexts, 0, key_cert_pair_count * sizeof(SSL_CTX *));
   impl->ssl_context_x509_subject_names =
-      calloc(key_cert_pair_count, sizeof(tsi_peer));
+      gpr_malloc(key_cert_pair_count * sizeof(tsi_peer));
+  memset(impl->ssl_context_x509_subject_names, 0, key_cert_pair_count * sizeof(tsi_peer));
   if (impl->ssl_contexts == NULL ||
       impl->ssl_context_x509_subject_names == NULL) {
     tsi_ssl_handshaker_factory_destroy(&impl->base);
diff --git a/src/core/tsi/transport_security.c b/src/core/tsi/transport_security.c
index db219a50a67..e17749d871a 100644
--- a/src/core/tsi/transport_security.c
+++ b/src/core/tsi/transport_security.c
@@ -239,16 +239,10 @@ void tsi_peer_destruct(tsi_peer *self) {
 tsi_result tsi_construct_allocated_string_peer_property(
     const char *name, size_t value_length, tsi_peer_property *property) {
   *property = tsi_init_peer_property();
-  if (name != NULL) {
-    property->name = tsi_strdup(name);
-    if (property->name == NULL) return TSI_OUT_OF_RESOURCES;
-  }
+  if (name != NULL) property->name = gpr_strdup(name);
   if (value_length > 0) {
-    property->value.data = calloc(1, value_length);
-    if (property->value.data == NULL) {
-      tsi_peer_property_destruct(property);
-      return TSI_OUT_OF_RESOURCES;
-    }
+    property->value.data = gpr_malloc(value_length);
+    memset(value.data, 0, value_length);
     property->value.length = value_length;
   }
   return TSI_OK;
@@ -276,8 +270,8 @@ tsi_result tsi_construct_string_peer_property(const char *name,
 tsi_result tsi_construct_peer(size_t property_count, tsi_peer *peer) {
   memset(peer, 0, sizeof(tsi_peer));
   if (property_count > 0) {
-    peer->properties = calloc(property_count, sizeof(tsi_peer_property));
-    if (peer->properties == NULL) return TSI_OUT_OF_RESOURCES;
+    peer->properties = gpr_malloc(property_count * sizeof(tsi_peer_property));
+    memset(peer->properties, 0, property_count * sizeof(tsi_peer_property));
     peer->property_count = property_count;
   }
   return TSI_OK;
diff --git a/test/core/iomgr/endpoint_tests.c b/test/core/iomgr/endpoint_tests.c
index f689e4ba7fb..cb23f58eca5 100644
--- a/test/core/iomgr/endpoint_tests.c
+++ b/test/core/iomgr/endpoint_tests.c
@@ -89,7 +89,7 @@ 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);
+  gpr_slice *slices = gpr_malloc(sizeof(gpr_slice) * nslices);
   size_t num_bytes_left = num_bytes;
   size_t i;
   size_t j;
@@ -164,7 +164,7 @@ static void read_and_write_test_write_handler(grpc_exec_ctx *exec_ctx,
       gpr_slice_buffer_addn(&state->outgoing, slices, nslices);
       grpc_endpoint_write(exec_ctx, state->write_ep, &state->outgoing,
                           &state->done_write);
-      free(slices);
+      gpr_free(slices);
       return;
     }
   }
diff --git a/test/core/iomgr/tcp_posix_test.c b/test/core/iomgr/tcp_posix_test.c
index 4351642ab6e..b2cf87a0c25 100644
--- a/test/core/iomgr/tcp_posix_test.c
+++ b/test/core/iomgr/tcp_posix_test.c
@@ -97,7 +97,7 @@ static ssize_t fill_socket(int fd) {
 static size_t fill_socket_partial(int fd, size_t bytes) {
   ssize_t write_bytes;
   size_t total_bytes = 0;
-  unsigned char *buf = malloc(bytes);
+  unsigned char *buf = gpr_malloc(bytes);
   unsigned i;
   for (i = 0; i < bytes; ++i) {
     buf[i] = (uint8_t)(i % 256);
@@ -292,7 +292,7 @@ static void write_done(grpc_exec_ctx *exec_ctx,
 }
 
 void drain_socket_blocking(int fd, size_t num_bytes, size_t read_size) {
-  unsigned char *buf = malloc(read_size);
+  unsigned char *buf = gpr_malloc(read_size);
   ssize_t bytes_read;
   size_t bytes_left = num_bytes;
   int flags;
diff --git a/test/core/network_benchmarks/low_level_ping_pong.c b/test/core/network_benchmarks/low_level_ping_pong.c
index 7ed3372d5d1..8179ba3b4df 100644
--- a/test/core/network_benchmarks/low_level_ping_pong.c
+++ b/test/core/network_benchmarks/low_level_ping_pong.c
@@ -265,19 +265,19 @@ static int epoll_setup(thread_args *args) {
 #endif
 
 static void server_thread(thread_args *args) {
-  char *buf = malloc(args->msg_size);
+  char *buf = gpr_malloc(args->msg_size);
   if (args->setup(args) < 0) {
     gpr_log(GPR_ERROR, "Setup failed");
   }
   for (;;) {
     if (args->read_bytes(args, buf) < 0) {
       gpr_log(GPR_ERROR, "Server read failed");
-      free(buf);
+      gpr_free(buf);
       return;
     }
     if (args->write_bytes(args, buf) < 0) {
       gpr_log(GPR_ERROR, "Server write failed");
-      free(buf);
+      gpr_free(buf);
       return;
     }
   }
@@ -304,7 +304,8 @@ static double now(void) {
 }
 
 static void client_thread(thread_args *args) {
-  char *buf = calloc(args->msg_size, sizeof(char));
+  char *buf = gpr_malloc(args->msg_size * sizeof(char));
+  memset(buf, 0, args->msg_size * sizeof(char));
   gpr_histogram *histogram = gpr_histogram_create(0.01, 60e9);
   double start_time;
   double end_time;
@@ -333,7 +334,7 @@ static void client_thread(thread_args *args) {
   }
   print_histogram(histogram);
 error:
-  free(buf);
+  gpr_free(buf);
   gpr_histogram_destroy(histogram);
 }
 
@@ -596,8 +597,8 @@ static int run_all_benchmarks(size_t msg_size) {
     test_strategy *strategy = &test_strategies[i];
     size_t j;
     for (j = 0; j < GPR_ARRAY_SIZE(socket_types); ++j) {
-      thread_args *client_args = malloc(sizeof(thread_args));
-      thread_args *server_args = malloc(sizeof(thread_args));
+      thread_args *client_args = gpr_malloc(sizeof(thread_args));
+      thread_args *server_args = gpr_malloc(sizeof(thread_args));
       char *socket_type = socket_types[j];
 
       client_args->read_bytes = strategy->read_strategy;
@@ -620,8 +621,8 @@ static int run_all_benchmarks(size_t msg_size) {
 }
 
 int main(int argc, char **argv) {
-  thread_args *client_args = malloc(sizeof(thread_args));
-  thread_args *server_args = malloc(sizeof(thread_args));
+  thread_args *client_args = gpr_malloc(sizeof(thread_args));
+  thread_args *server_args = gpr_malloc(sizeof(thread_args));
   int msg_size = -1;
   char *read_strategy = NULL;
   char *socket_type = NULL;
diff --git a/test/core/support/alloc_test.c b/test/core/support/alloc_test.c
index e2d0c16b41d..7eaf7a14f3e 100644
--- a/test/core/support/alloc_test.c
+++ b/test/core/support/alloc_test.c
@@ -46,7 +46,7 @@ static void fake_free(void *addr) {
 static void test_custom_allocs() {
   const gpr_allocation_functions default_fns = gpr_get_allocation_functions();
   intptr_t addr_to_free = 0;
-  int *i;
+  char *i;
   gpr_allocation_functions fns = {fake_malloc, fake_realloc, fake_free};
 
   gpr_set_allocation_functions(fns);
@@ -58,7 +58,7 @@ static void test_custom_allocs() {
 
   /* Restore and check we don't get funky values and that we don't leak */
   gpr_set_allocation_functions(default_fns);
-  GPR_ASSERT((void *)1 != (i = gpr_malloc(sizeof(*i))));
+  GPR_ASSERT((void *)sizeof(*i) != (i = gpr_malloc(sizeof(*i))));
   GPR_ASSERT((void *)2 != (i = gpr_realloc(i, 2)));
   gpr_free(i);
 }