RPCSX/llvm
1
0
Fork 0
mirror of https://github.com/RPCSX/llvm.git synced 2024-11-24 20:29:53 +00:00
Code Issues Actions Packages Projects Releases Wiki Activity

MemoryBuffer: Support reading named pipes in getFile().

Browse Source 
- We only support this when the client didn't claim to know the file size.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@167407 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Daniel Dunbar 2012-11-05 21:55:40 +00:00
parent a4ab5290e6
commit 7895353b75
1 changed files with 29 additions and 16 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

45
lib/Support/MemoryBuffer.cpp
View File

@ -201,6 +201,27 @@ public:
};
}
static error_code getMemoryBufferForStream(int FD,
StringRef BufferName,
OwningPtr<MemoryBuffer> &result) {
const ssize_t ChunkSize = 4096*4;
SmallString<ChunkSize> Buffer;
ssize_t ReadBytes;
// Read into Buffer until we hit EOF.
do {
Buffer.reserve(Buffer.size() + ChunkSize);
ReadBytes = read(FD, Buffer.end(), ChunkSize);
if (ReadBytes == -1) {
if (errno == EINTR) continue;
return error_code(errno, posix_category());
}
Buffer.set_size(Buffer.size() + ReadBytes);
} while (ReadBytes != 0);
result.reset(MemoryBuffer::getMemBufferCopy(Buffer, BufferName));
return error_code::success();
}
error_code MemoryBuffer::getFile(StringRef Filename,
OwningPtr<MemoryBuffer> &result,
int64_t FileSize,
@ -297,6 +318,13 @@ error_code MemoryBuffer::getOpenFile(int FD, const char *Filename,
if (fstat(FD, &FileInfo) == -1) {
return error_code(errno, posix_category());
}
// If this is a named pipe, we can't trust the size. Create the memory
// buffer by copying off the stream.
if (FileInfo.st_mode & S_IFIFO) {
return getMemoryBufferForStream(FD, Filename, result);
}
FileSize = FileInfo.st_size;
}
MapSize = FileSize;
@ -370,20 +398,5 @@ error_code MemoryBuffer::getSTDIN(OwningPtr<MemoryBuffer> &result) {
// fallback if it fails.
sys::Program::ChangeStdinToBinary();
const ssize_t ChunkSize = 4096*4;
SmallString<ChunkSize> Buffer;
ssize_t ReadBytes;
// Read into Buffer until we hit EOF.
do {
Buffer.reserve(Buffer.size() + ChunkSize);
ReadBytes = read(0, Buffer.end(), ChunkSize);
if (ReadBytes == -1) {
if (errno == EINTR) continue;
return error_code(errno, posix_category());
}
Buffer.set_size(Buffer.size() + ReadBytes);
} while (ReadBytes != 0);
result.reset(getMemBufferCopy(Buffer, "<stdin>"));
return error_code::success();
return getMemoryBufferForStream(0, "<stdin>", result);
}