For PR797:

Adjust users of MappedFile to its new non-throwing interface.  Note that in
most cases the lazy step of just throwing after a call to MappedFile was
installed. This was done in the name of incremental changes. Getting rid of
the new throw statements will take adjustment of interfaces and propagation
of errors to higher levels.  Those changes will come in subsequent patches.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@29817 91177308-0d34-0410-b5e6-96231b3b80d8

3 files changed, 21 insertions, 8 deletions

diff --git a/include/llvm/Debugger/SourceFile.h b/include/llvm/Debugger/SourceFile.h
index 6d49fbe5d2..e54660cb7a 100644
--- a/include/llvm/Debugger/SourceFile.h
+++ b/include/llvm/Debugger/SourceFile.h
@@ -50,7 +50,10 @@ namespace llvm {
     /// reading it, or if the user cancels the operation.  Instead, it will just
     /// be an empty source file.
     SourceFile(const std::string &fn, const GlobalVariable *Desc)
-      : Filename(fn), Descriptor(Desc), File(Filename) {
+      : Filename(fn), Descriptor(Desc), File() {
+        std::string ErrMsg;
+      if (File.open(Filename, sys::MappedFile::READ_ACCESS, &ErrMsg))
+        throw ErrMsg;
       readFile();
     }
     ~SourceFile() {
diff --git a/lib/Debugger/SourceFile.cpp b/lib/Debugger/SourceFile.cpp
index 222cdfa26a..799231fc8d 100644
--- a/lib/Debugger/SourceFile.cpp
+++ b/lib/Debugger/SourceFile.cpp
@@ -19,7 +19,9 @@ using namespace llvm;
 /// readFile - Load Filename
 ///
 void SourceFile::readFile() {
-  File.map();
+  std::string ErrMsg;
+  if (File.map(&ErrMsg))
+    throw ErrMsg;
 }
 
 /// calculateLineOffsets - Compute the LineOffset vector for the current file.
diff --git a/lib/Support/FileUtilities.cpp b/lib/Support/FileUtilities.cpp
index d4608ccb65..313598942a 100644
--- a/lib/Support/FileUtilities.cpp
+++ b/lib/Support/FileUtilities.cpp
@@ -147,9 +147,11 @@ int llvm::DiffFilesWithTolerance(const sys::Path &FileA,
                                  double AbsTol, double RelTol,
                                  std::string *Error) {
   sys::FileStatus FileAStat, FileBStat;
-  if (FileA.getFileStatus(FileAStat, Error) ||
-      FileB.getFileStatus(FileBStat, Error))
+  if (FileA.getFileStatus(FileAStat, Error))
     return 2;
+  if (FileB.getFileStatus(FileBStat, Error))
+    return 2;
+
   // Check for zero length files because some systems croak when you try to
   // mmap an empty file.
   size_t A_size = FileAStat.getSize();
@@ -165,10 +167,16 @@ int llvm::DiffFilesWithTolerance(const sys::Path &FileA,
   try {
     // Now its safe to mmap the files into memory becasue both files
     // have a non-zero size.
-    sys::MappedFile F1(FileA);
-    sys::MappedFile F2(FileB);
-    F1.map();
-    F2.map();
+    sys::MappedFile F1;
+    if (F1.open(FileA, sys::MappedFile::READ_ACCESS, Error))
+      return 2;
+    sys::MappedFile F2;
+    if (F2.open(FileB, sys::MappedFile::READ_ACCESS, Error))
+      return 2;
+    if (!F1.map(Error))
+      return 2;
+    if (!F2.map(Error))
+      return 2;
 
     // Okay, now that we opened the files, scan them for the first difference.
     char *File1Start = F1.charBase();