Support for truncate/append on log files

Summary:
Presently, if a log file already exists, lldb simply starts overwriting bits of it, without
truncating or anything. This patch makes it use eFileOptionFileTruncate by default. It also adds
an --append option, which will append to the file without truncating. A test is included.

Reviewers: clayborg

Subscribers: lldb-commits

Differential Revision: http://reviews.llvm.org/D8450

llvm-svn: 232801

1 files changed, 7 insertions, 0 deletions

diff --git a/lldb/source/Core/StreamFile.cpp b/lldb/source/Core/StreamFile.cpp
index 9f8dd629e3d..8c9700c6dcb 100644
--- a/lldb/source/Core/StreamFile.cpp
+++ b/lldb/source/Core/StreamFile.cpp
@@ -54,6 +54,13 @@ StreamFile::StreamFile (const char *path) :
 {
 }
 
+StreamFile::StreamFile (const char *path,
+                        uint32_t options,
+                        uint32_t permissions) :
+    Stream(),
+    m_file(path, options, permissions)
+{
+}
 
 StreamFile::~StreamFile()
 {