Mercurial > hg > graal-compiler
diff src/share/vm/utilities/vmError.cpp @ 20779:d7b6bdd51abe jdk8u31-b10
8050807: Better performing performance data handling
Reviewed-by: dcubed, pnauman, ctornqvi, dholmes, mschoene
Contributed-by: gerald.thornbrugh@oracle.com
| author | gthornbr |
|---|---|
| date | Mon, 17 Nov 2014 15:51:46 -0500 |
| parents | f73af4455d7d |
| children | 42f27b59c550 5ca2ea5eeff0 |
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--- a/src/share/vm/utilities/vmError.cpp Mon Nov 24 09:18:13 2014 -0800 +++ b/src/share/vm/utilities/vmError.cpp Mon Nov 17 15:51:46 2014 -0500 @@ -22,6 +22,7 @@ * */ +#include <fcntl.h> #include "precompiled.hpp" #include "compiler/compileBroker.hpp" #include "gc_interface/collectedHeap.hpp" @@ -836,7 +837,8 @@ static int expand_and_open(const char* pattern, char* buf, size_t buflen, size_t pos) { int fd = -1; if (Arguments::copy_expand_pid(pattern, strlen(pattern), &buf[pos], buflen - pos)) { - fd = open(buf, O_RDWR | O_CREAT | O_TRUNC, 0666); + // the O_EXCL flag will cause the open to fail if the file exists + fd = open(buf, O_RDWR | O_CREAT | O_EXCL, 0666); } return fd; }