From bf16b5b9880eb89b283006db090dce4346aa877b Mon Sep 17 00:00:00 2001
From: Man Cao <manc@openjdk.org>
Date: Fri, 10 Mar 2023 18:14:09 +0000
Subject: [PATCH] 8303937: Corrupted heap dumps due to missing retries for
 os::write()

Reviewed-by: cjplummer, dholmes
---
 src/hotspot/share/services/heapDumperCompression.cpp | 10 +++++++---
 1 file changed, 7 insertions(+), 3 deletions(-)

diff --git a/src/hotspot/share/services/heapDumperCompression.cpp b/src/hotspot/share/services/heapDumperCompression.cpp
index c9ace619097..bd2ca18c61d 100644
--- a/src/hotspot/share/services/heapDumperCompression.cpp
+++ b/src/hotspot/share/services/heapDumperCompression.cpp
@@ -55,10 +55,14 @@ char const* FileWriter::write_buf(char* buf, ssize_t size) {
   assert(_fd >= 0, "Must be open");
   assert(size > 0, "Must write at least one byte");
 
-  ssize_t n = os::write(_fd, buf, (uint) size);
+  while (size > 0) {
+    ssize_t n = os::write(_fd, buf, (uint) size);
+    if (n <= 0) {
+      return os::strerror(errno);
+    }
 
-  if (n <= 0) {
-    return os::strerror(errno);
+    buf += n;
+    size -= n;
   }
 
   return nullptr;