Index: compiler-rt/lib/sanitizer_common/sanitizer_fuchsia.cc
===================================================================
--- compiler-rt/lib/sanitizer_common/sanitizer_fuchsia.cc
+++ compiler-rt/lib/sanitizer_common/sanitizer_fuchsia.cc
@@ -407,7 +407,18 @@
 }
 
 void RawWrite(const char *buffer) {
-  __sanitizer_log_write(buffer, internal_strlen(buffer));
+  static _Thread_local char line[128];
+  static _Thread_local unsigned long cur = 0;
+
+  while (*buffer) {
+    if (cur >= sizeof(line) || *buffer == '\n') {
+      __sanitizer_log_write(line, cur);
+      cur = 0;
+      if (*buffer == '\n') ++buffer;
+    } else {
+      line[cur++] = *buffer++;
+    }
+  }
 }
 
 void CatastrophicErrorWrite(const char *buffer, uptr length) {