Commit Graph

89 Commits

Author SHA1 Message Date
Reid Kleckner 86a8e1e0e4 MemoryBuffer: Increase the alignment of small file buffers to 16
This was manifesting as an LLVM_ASSUME_ALIGNED() failure in an ELF debug
info test when building LLVM with clang in the Microsoft C++ ABI.

llvm-svn: 197401
2013-12-16 18:18:12 +00:00
Rafael Espindola 1d19c8f03a Change MemoryBuffer::getFile to take a Twine.
llvm-svn: 193429
2013-10-25 19:06:52 +00:00
Matt Arsenault 305a22555a Fix typo
llvm-svn: 190424
2013-09-10 19:54:54 +00:00
NAKAMURA Takumi 65fc51bbe2 MemoryBuffer.cpp: Don't peek the next page if file is multiple of *physical* pagesize(4k) but is not multiple of AllocationGranularity(64k), when a null terminator is required, on cygwin and win32.
For example, r189780's SparcISelLowering.cpp has the size 98304. It crashed clang to touch a null terminator on cygwin.

FIXME: It's not good to hardcode 4096 here. dwPageSize shows 4096.
llvm-svn: 189939
2013-09-04 14:12:19 +00:00
NAKAMURA Takumi 9542678508 Whitespace.
llvm-svn: 189938
2013-09-04 14:12:12 +00:00
NAKAMURA Takumi 26c8ea657f MemoryBuffer.cpp: Consider if PageSize were not 4096 in shouldUseMmap(). Follow-up to r188903.
The AllocationGranularity can be 65536 on Win32, even on Cygwin.

llvm-svn: 188998
2013-08-22 10:23:52 +00:00
Rafael Espindola 3d2ac2e41a Split getOpenFile into getOpenFile and getOpenFileSlice.
The main observation is that we never need both the filesize and the map size.
When mapping a slice of a file, it doesn't make sense to request a null
terminator and that would be the only case where the filesize would be used.

There are other cleanups that should be done in this area:

* A client should not have to pass the size (even an explicit -1) to say if
  it wants a null terminator or not, so we should probably swap the argument
  order.
* The default should be to not require a null terminator. Very few clients
  require this, but many end up asking for it just because it is the default.

llvm-svn: 186984
2013-07-23 20:25:01 +00:00
Rafael Espindola 4d10587ff3 Convert two uses if fstat with sys::fs::status.
llvm-svn: 186560
2013-07-18 03:04:20 +00:00
Rafael Espindola 6d35481c94 Add a wrapper for open.
This centralizes the handling of O_BINARY and opens the way for hiding more
differences (like how open behaves with directories).

llvm-svn: 186447
2013-07-16 19:44:17 +00:00
Rafael Espindola 8ea26d6a80 Remove an extra is_directory call.
I checked that opening a directory on windows does fail, so this saves a "stat".

llvm-svn: 186345
2013-07-15 20:52:01 +00:00
Rafael Espindola 8c8117240c keep only the StringRef version of getFileOrSTDIN.
llvm-svn: 184826
2013-06-25 05:28:34 +00:00
Rafael Espindola cb2eca0f91 Remove the program class.
It was only used to implement ExecuteAndWait and ExecuteNoWait. Expose just
those two functions and make Execute and Wait implementations details.

llvm-svn: 183864
2013-06-12 20:58:35 +00:00
Rafael Espindola d88308767b Remove the old file memory mapping functions.
llvm-svn: 183828
2013-06-12 14:11:15 +00:00
Benjamin Kramer a73cc5eead Put private class into an anonmyous namespace.
llvm-svn: 178420
2013-03-30 15:23:08 +00:00
Michael J. Spencer 42ad29fa05 [Support] Fix lifetime of file descriptors when using MemoryBuffer.
Clients of MemoryBuffer::getOpenFile expect it not to take ownership of the file
descriptor passed in. So don't.

llvm-svn: 176995
2013-03-14 00:20:10 +00:00
Michael J. Spencer 2343a74aeb [Support][MemoryBuffer] Use sys::fs::mapped_file_region instead of sys::Path::MapInFilePages.
This gives us memory mapped file I/O on Windows.

llvm-svn: 176886
2013-03-12 19:28:19 +00:00
Argyrios Kyrtzidis db4443f7af In llvm::MemoryBuffer::getFile() remove an unnecessary stat call check.
The sys::fs::is_directory() check is unnecessary because, if the filename is
a directory, the function will fail anyway with the same error code returned.
Remove the check to avoid an unnecessary stat call.

Someone needs to review on windows and see if the check is necessary there or not.

llvm-svn: 176386
2013-03-01 22:48:51 +00:00
Dan Gohman 3e1729484f Update a portability kludge to keep it in sync with changes in the code
which uses it. This is not ideal, but it ought to at least restore the
behavior to what it was before.

llvm-svn: 175571
2013-02-19 22:38:58 +00:00
Dan Gohman 782609e146 Whitelist files and block devices instead of blacklisting fifos and
character devices.

llvm-svn: 175549
2013-02-19 19:36:55 +00:00
Dan Gohman 22954dbb7e Don't trust st_size of a character device. This fixes using
/dev/stdin as an input when stdin is connected to a tty, for example.

No test, because it's difficult to write a reasonably portable test
for this. /dev/stdin isn't a character device when stdin is redirected
from a file or connected to a pipe.

llvm-svn: 175542
2013-02-19 18:57:53 +00:00
Chandler Carruth acd64becb1 Go ahead and get rid of the old page size interface and convert all the
users over to the new one. No sense maintaining this "compatibility"
layer it seems.

llvm-svn: 171331
2012-12-31 23:31:56 +00:00
Chandler Carruth ed0881b2a6 Use the new script to sort the includes of every file under lib.
Sooooo many of these had incorrect or strange main module includes.
I have manually inspected all of these, and fixed the main module
include to be the nearest plausible thing I could find. If you own or
care about any of these source files, I encourage you to take some time
and check that these edits were sensible. I can't have broken anything
(I strictly added headers, and reordered them, never removed), but they
may not be the headers you'd really like to identify as containing the
API being implemented.

Many forward declarations and missing includes were added to a header
files to allow them to parse cleanly when included first. The main
module rule does in fact have its merits. =]

llvm-svn: 169131
2012-12-03 16:50:05 +00:00
Daniel Dunbar e2d25c2731 MemoryBuffer: Windows doesn't define S_IFIFO.
llvm-svn: 167467
2012-11-06 17:08:09 +00:00
Daniel Dunbar 43a172d935 MemoryBuffer: Support reading named pipes in getFile().
- We only support this when the client didn't claim to know the file size.

llvm-svn: 167407
2012-11-05 21:55:40 +00:00
Craig Topper 3186c01fec Add LLVM_OVERRIDE to methods that override their base classes.
llvm-svn: 164471
2012-09-23 02:12:10 +00:00