Merge pull request #10691 from ncteisen/error-refcount

Fix error refcount debug logging

src/core/lib/iomgr/error.c

@@ -217,8 +217,14 @@ static uint8_t get_placement(grpc_error **err, size_t size) {
     if ((*err)->arena_size + slots > (*err)->arena_capacity) {
       return UINT8_MAX;
     }
+#ifdef GRPC_ERROR_REFCOUNT_DEBUG
+    grpc_error *orig = *err;
+#endif
     *err = gpr_realloc(
         *err, sizeof(grpc_error) + (*err)->arena_capacity * sizeof(intptr_t));
+#ifdef GRPC_ERROR_REFCOUNT_DEBUG
+    if (*err != orig) gpr_log(GPR_DEBUG, "realloc %p -> %p", orig, *err);
+#endif
   }
   uint8_t placement = (*err)->arena_size;
   (*err)->arena_size = (uint8_t)((*err)->arena_size + slots);
@@ -313,7 +319,7 @@ static void internal_add_error(grpc_error **err, grpc_error *new) {
 // It is very common to include and extra int and string in an error
 #define SURPLUS_CAPACITY (2 * SLOTS_PER_INT + SLOTS_PER_TIME)
 
-grpc_error *grpc_error_create(grpc_slice file, int line, grpc_slice desc,
+grpc_error *grpc_error_create(const char *file, int line, grpc_slice desc,
                               grpc_error **referencing,
                               size_t num_referencing) {
   GPR_TIMER_BEGIN("grpc_error_create", 0);
@@ -339,7 +345,8 @@ grpc_error *grpc_error_create(grpc_slice file, int line, grpc_slice desc,
   memset(err->times, UINT8_MAX, GRPC_ERROR_TIME_MAX);
 
   internal_set_int(&err, GRPC_ERROR_INT_FILE_LINE, line);
-  internal_set_str(&err, GRPC_ERROR_STR_FILE, file);
+  internal_set_str(&err, GRPC_ERROR_STR_FILE,
+                   grpc_slice_from_static_string(file));
   internal_set_str(&err, GRPC_ERROR_STR_DESCRIPTION, desc);
 
   for (size_t i = 0; i < num_referencing; ++i) {
@@ -756,7 +763,7 @@ grpc_error *grpc_os_error(const char *file, int line, int err,
   return grpc_error_set_str(
       grpc_error_set_str(
           grpc_error_set_int(
-              grpc_error_create(grpc_slice_from_static_string(file), line,
+              grpc_error_create(file, line,
                                 grpc_slice_from_static_string("OS Error"), NULL,
                                 0),
               GRPC_ERROR_INT_ERRNO, err),
@@ -772,7 +779,7 @@ grpc_error *grpc_wsa_error(const char *file, int line, int err,
   grpc_error *error = grpc_error_set_str(
       grpc_error_set_str(
           grpc_error_set_int(
-              grpc_error_create(grpc_slice_from_static_string(file), line,
+              grpc_error_create(file, line,
                                 grpc_slice_from_static_string("OS Error"), NULL,
                                 0),
               GRPC_ERROR_INT_WSA_ERROR, err),

src/core/lib/iomgr/error.h

@@ -138,7 +138,7 @@ typedef enum {
 const char *grpc_error_string(grpc_error *error);
 
 /// Create an error - but use GRPC_ERROR_CREATE instead
-grpc_error *grpc_error_create(grpc_slice file, int line, grpc_slice desc,
+grpc_error *grpc_error_create(const char *file, int line, grpc_slice desc,
                               grpc_error **referencing, size_t num_referencing);
 /// Create an error (this is the preferred way of generating an error that is
 ///   not due to a system call - for system calls, use GRPC_OS_ERROR or
@@ -148,21 +148,21 @@ grpc_error *grpc_error_create(grpc_slice file, int line, grpc_slice desc,
 /// err = grpc_error_create(x, y, z, r, nr) is equivalent to:
 ///   err = grpc_error_create(x, y, z, NULL, 0);
 ///   for (i=0; i<nr; i++) err = grpc_error_add_child(err, r[i]);
-#define GRPC_ERROR_CREATE_FROM_STATIC_STRING(desc)                     \
-  grpc_error_create(grpc_slice_from_static_string(__FILE__), __LINE__, \
-                    grpc_slice_from_static_string(desc), NULL, 0)
-#define GRPC_ERROR_CREATE_FROM_COPIED_STRING(desc)                     \
-  grpc_error_create(grpc_slice_from_static_string(__FILE__), __LINE__, \
-                    grpc_slice_from_copied_string(desc), NULL, 0)
+#define GRPC_ERROR_CREATE_FROM_STATIC_STRING(desc)                           \
+  grpc_error_create(__FILE__, __LINE__, grpc_slice_from_static_string(desc), \
+                    NULL, 0)
+#define GRPC_ERROR_CREATE_FROM_COPIED_STRING(desc)                           \
+  grpc_error_create(__FILE__, __LINE__, grpc_slice_from_copied_string(desc), \
+                    NULL, 0)
 
 // Create an error that references some other errors. This function adds a
 // reference to each error in errs - it does not consume an existing reference
-#define GRPC_ERROR_CREATE_REFERENCING_FROM_STATIC_STRING(desc, errs, count) \
-  grpc_error_create(grpc_slice_from_static_string(__FILE__), __LINE__,      \
-                    grpc_slice_from_static_string(desc), errs, count)
-#define GRPC_ERROR_CREATE_REFERENCING_FROM_COPIED_STRING(desc, errs, count) \
-  grpc_error_create(grpc_slice_from_static_string(__FILE__), __LINE__,      \
-                    grpc_slice_from_copied_string(desc), errs, count)
+#define GRPC_ERROR_CREATE_REFERENCING_FROM_STATIC_STRING(desc, errs, count)  \
+  grpc_error_create(__FILE__, __LINE__, grpc_slice_from_static_string(desc), \
+                    errs, count)
+#define GRPC_ERROR_CREATE_REFERENCING_FROM_COPIED_STRING(desc, errs, count)  \
+  grpc_error_create(__FILE__, __LINE__, grpc_slice_from_copied_string(desc), \
+                    errs, count)
 
 //#define GRPC_ERROR_REFCOUNT_DEBUG
 #ifdef GRPC_ERROR_REFCOUNT_DEBUG