#include "llvm/Support/ErrorHandling.h"
#include "llvm/ADT/STLExtras.h"
#include <cctype>
+#include <cerrno>
#include <sys/stat.h>
#include <sys/types.h>
delete [] OutBufStart;
// If there are any pending errors, report them now. Clients wishing
- // to avoid llvm_report_error calls should check for errors with
+ // to avoid report_fatal_error calls should check for errors with
// has_error() and clear the error flag with clear_error() before
// destructing raw_ostream objects which may have errors.
if (Error)
- llvm_report_error("IO failure on output stream.");
+ report_fatal_error("IO failure on output stream.");
}
// An out of line virtual method to provide a home for the class vtable.
SetUnbuffered();
}
-void raw_ostream::SetBufferAndMode(char *BufferStart, size_t Size,
+void raw_ostream::SetBufferAndMode(char *BufferStart, size_t Size,
BufferKind Mode) {
- assert(((Mode == Unbuffered && BufferStart == 0 && Size == 0) ||
+ assert(((Mode == Unbuffered && BufferStart == 0 && Size == 0) ||
(Mode != Unbuffered && BufferStart && Size)) &&
"stream must be unbuffered or have at least one byte");
// Make sure the current buffer is free of content (we can't flush here; the
// Zero is a special case.
if (N == 0)
return *this << '0';
-
+
char NumberBuffer[20];
char *EndPtr = NumberBuffer+sizeof(NumberBuffer);
char *CurPtr = EndPtr;
-
+
while (N) {
*--CurPtr = '0' + char(N % 10);
N /= 10;
*this << '-';
N = -N;
}
-
+
return this->operator<<(static_cast<unsigned long>(N));
}
char NumberBuffer[20];
char *EndPtr = NumberBuffer+sizeof(NumberBuffer);
char *CurPtr = EndPtr;
-
+
while (N) {
*--CurPtr = '0' + char(N % 10);
N /= 10;
}
raw_ostream &raw_ostream::operator<<(long long N) {
- if (N < 0) {
+ if (N < 0) {
*this << '-';
- N = -N;
+ // Avoid undefined behavior on INT64_MIN with a cast.
+ N = -(unsigned long long)N;
}
-
+
return this->operator<<(static_cast<unsigned long long>(N));
}
size_t BufferBytesLeft = OutBufEnd - OutBufCur;
if (BufferBytesLeft > 3) {
size_t BytesUsed = Fmt.print(OutBufCur, BufferBytesLeft);
-
+
// Common case is that we have plenty of space.
if (BytesUsed <= BufferBytesLeft) {
OutBufCur += BytesUsed;
return *this;
}
-
+
// Otherwise, we overflowed and the return value tells us the size to try
// again with.
NextBufferSize = BytesUsed;
}
-
+
// If we got here, we didn't have enough space in the output buffer for the
// string. Try printing into a SmallVector that is resized to have enough
// space. Iterate until we win.
SmallVector<char, 128> V;
-
+
while (1) {
V.resize(NextBufferSize);
-
+
// Try formatting into the SmallVector.
size_t BytesUsed = Fmt.print(V.data(), NextBufferSize);
-
+
// If BytesUsed fit into the vector, we win.
if (BytesUsed <= NextBufferSize)
return write(V.data(), BytesUsed);
-
+
// Otherwise, try again with a new size.
assert(BytesUsed > NextBufferSize && "Didn't grow buffer!?");
NextBufferSize = BytesUsed;
// Usually the indentation is small, handle it with a fastpath.
if (NumSpaces < array_lengthof(Spaces))
return write(Spaces, NumSpaces);
-
+
while (NumSpaces) {
unsigned NumToWrite = std::min(NumSpaces,
(unsigned)array_lengthof(Spaces)-1);
// Verify that we don't have both "append" and "excl".
assert((!(Flags & F_Excl) || !(Flags & F_Append)) &&
"Cannot specify both 'excl' and 'append' file creation flags!");
-
+
ErrorInfo.clear();
// Handle "-" as stdout.
ShouldClose = false;
return;
}
-
+
int OpenFlags = O_WRONLY|O_CREAT;
#ifdef O_BINARY
if (Flags & F_Binary)
OpenFlags |= O_BINARY;
#endif
-
+
if (Flags & F_Append)
OpenFlags |= O_APPEND;
else
OpenFlags |= O_TRUNC;
if (Flags & F_Excl)
OpenFlags |= O_EXCL;
-
- FD = open(Filename, OpenFlags, 0664);
- if (FD < 0) {
- ErrorInfo = "Error opening output file '" + std::string(Filename) + "'";
- ShouldClose = false;
- } else {
- ShouldClose = true;
+
+ while ((FD = open(Filename, OpenFlags, 0664)) < 0) {
+ if (errno != EINTR) {
+ ErrorInfo = "Error opening output file '" + std::string(Filename) + "'";
+ ShouldClose = false;
+ return;
+ }
}
+
+ // Ok, we successfully opened the file, so it'll need to be closed.
+ ShouldClose = true;
}
raw_fd_ostream::~raw_fd_ostream() {
if (FD < 0) return;
flush();
if (ShouldClose)
- if (::close(FD) != 0)
- error_detected();
+ while (::close(FD) != 0)
+ if (errno != EINTR) {
+ error_detected();
+ break;
+ }
}
void raw_fd_ostream::write_impl(const char *Ptr, size_t Size) {
- assert (FD >= 0 && "File already closed.");
+ assert(FD >= 0 && "File already closed.");
pos += Size;
- if (::write(FD, Ptr, Size) != (ssize_t) Size)
- error_detected();
+
+ do {
+ ssize_t ret = ::write(FD, Ptr, Size);
+
+ if (ret < 0) {
+ // If it's a recoverable error, swallow it and retry the write.
+ //
+ // Ideally we wouldn't ever see EAGAIN or EWOULDBLOCK here, since
+ // raw_ostream isn't designed to do non-blocking I/O. However, some
+ // programs, such as old versions of bjam, have mistakenly used
+ // O_NONBLOCK. For compatibility, emulate blocking semantics by
+ // spinning until the write succeeds. If you don't want spinning,
+ // don't use O_NONBLOCK file descriptors with raw_ostream.
+ if (errno == EINTR || errno == EAGAIN
+#ifdef EWOULDBLOCK
+ || errno == EWOULDBLOCK
+#endif
+ )
+ continue;
+
+ // Otherwise it's a non-recoverable error. Note it and quit.
+ error_detected();
+ break;
+ }
+
+ // The write may have written some or all of the data. Update the
+ // size and buffer pointer to reflect the remainder that needs
+ // to be written. If there are no bytes left, we're done.
+ Ptr += ret;
+ Size -= ret;
+ } while (Size > 0);
}
void raw_fd_ostream::close() {
- assert (ShouldClose);
+ assert(ShouldClose);
ShouldClose = false;
flush();
- if (::close(FD) != 0)
- error_detected();
+ while (::close(FD) != 0)
+ if (errno != EINTR) {
+ error_detected();
+ break;
+ }
FD = -1;
}
pos = ::lseek(FD, off, SEEK_SET);
if (pos != off)
error_detected();
- return pos;
+ return pos;
}
size_t raw_fd_ostream::preferred_buffer_size() const {
-#if !defined(_MSC_VER) && !defined(__MINGW32__) // Windows has no st_blksize.
+#if !defined(_MSC_VER) && !defined(__MINGW32__) && !defined(__minix)
+ // Windows and Minix have no st_blksize.
assert(FD >= 0 && "File not yet open!");
struct stat statbuf;
if (fstat(FD, &statbuf) != 0)
return 0;
-
+
// If this is a terminal, don't use buffering. Line buffering
// would be a more traditional thing to do, but it's not worth
// the complexity.
return 0;
// Return the preferred block size.
return statbuf.st_blksize;
-#endif
+#else
return raw_ostream::preferred_buffer_size();
+#endif
}
raw_ostream &raw_fd_ostream::changeColor(enum Colors colors, bool bold,
projects / oota-llvm.git / blobdiff