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38 Commits

Author SHA1 Message Date
Benjamin Kramer
b36c7df69c Rewrite MemoryBuffer::getSTDIN to use read(2) and a SmallVector buffer. 
llvm-svn: 106856
 2010-06-25 16:07:18 +00:00
Benjamin Kramer
1d187ed03e Bring back the empty vector workaround I removed in r106839. Looks like MSVC needs it. 
llvm-svn: 106841
 2010-06-25 12:51:01 +00:00
Benjamin Kramer
afe7228ede Tweak MemoryBuffer to allocate the class itself, the name and possibly the 
buffer in the same chunk of memory.

2 less mallocs for every uninitialized MemoryBuffer and 1 less malloc for every
MemoryBuffer pointing to a memory range translate into 20% less mallocs on
clang -cc1 -Eonly Cocoa_h.m.

llvm-svn: 106839
 2010-06-25 11:50:40 +00:00
Dan Gohman
abeebe353c Add overloads for getFile and getFileOrSTDIN which take a const char * 
instead of a StringRef, avoiding the need to copy the string in the
common case.

llvm-svn: 106754
 2010-06-24 16:25:50 +00:00
Dan Gohman
ff9e611537 Add an explicit keyword. 
llvm-svn: 106538
 2010-06-22 13:53:29 +00:00
Dan Gohman
9789093ab7 Add basic error checking to MemoryBuffer::getSTDIN. 
llvm-svn: 104855
 2010-05-27 17:31:51 +00:00
Chris Lattner
269737461d stringref-ize the MemoryBuffer::get apis. This requires 
a co-committed clang patch.

llvm-svn: 100485
 2010-04-05 22:42:30 +00:00
Benjamin Kramer
1ef6689d58 Remove accidental include and add a comment. 
llvm-svn: 100107
 2010-04-01 14:39:55 +00:00
Benjamin Kramer
71eaf27165 Various improvements to MemoryBuffer::getFile: 
- Use a RAII object to close the FD.
- Use sys::StrError instead of thread-unsafe strerror calls.
- Recover gracefully if read returns zero. This works around an issue on
  DragonFlyBSD where /dev/null has an st_size of 136 but we can't read 136 bytes
  from it.

llvm-svn: 100106
 2010-04-01 14:35:22 +00:00
Douglas Gregor
84ef0ef3b9 Extend MemoryBuffer::getFile() to take an optional "stat" structure 
pointer. If given, the structure will be set with the stat information from
the file actually read.

llvm-svn: 98575
 2010-03-15 20:32:14 +00:00
Benjamin Kramer
db1d98a624 Replace a temporary std::string with SmallString. 
llvm-svn: 97259
 2010-02-26 20:28:29 +00:00
Chris Lattner
0f8308d48a sizeof(char) is always 1. 
llvm-svn: 92079
 2009-12-23 23:03:24 +00:00
Chris Lattner
bd9a13086f return more useful error messages by using strerror to format errno 
instead of returning an ambiguous reason.

llvm-svn: 90275
 2009-12-01 22:51:41 +00:00
Daniel Dunbar
886e51b5c1 Fix MemoryBuffer::getSTDIN to *not* return null if stdin is empty, this is a lame API. 
Also, Stringrefify some more MemoryBuffer functions, and add two performance FIXMEs.

llvm-svn: 86630
 2009-11-10 00:43:58 +00:00
Duncan Sands
7d20275318 A value is only assigned to errno if NumRead equals -1, so do 
not reason based on errno if NumRead has a different value.

llvm-svn: 86046
 2009-11-04 20:50:23 +00:00
Duncan Sands
d4b8f9ee93 Make this code more robust by not thinking we are making progress 
if zero bytes were read.

llvm-svn: 85922
 2009-11-03 19:10:22 +00:00
Eli Friedman
573333530f Tweak MemoryBuffer::getSTDIN so that it returns after the first EOF. 
It doesn't matter for piped input, but it's annoying when typing at the 
console.

llvm-svn: 71998
 2009-05-18 08:44:04 +00:00
Evan Cheng
ec9d3c889f Switch from new[] + delete[] to malloc + free since llvm does not catch C++ exceptions. 
llvm-svn: 64448
 2009-02-13 08:24:55 +00:00
Evan Cheng
643730a194 If new[] fails, return 0 rather then trying to dereference a null pointer. 
llvm-svn: 64444
 2009-02-13 07:54:34 +00:00
Evan Cheng
d9353009b7 Fix more -Wshorten-64-to-32 warnings. 
llvm-svn: 50659
 2008-05-05 18:30:58 +00:00
Gabor Greif
134707f8e8 fcntl.h is pretty standard on unix (without the sys/) 
llvm-svn: 50475
 2008-04-30 08:53:22 +00:00
Bill Wendling
fb7564e94c Fix compilation errors on MSVC. Patch by Argiris Kirtzidis! 
llvm-svn: 49055
 2008-04-01 22:09:20 +00:00
Chris Lattner
d141d16ed7 Change the MemoryBuffer::getFile* methods to take just a pointer to the 
start of a filename, not a filename+length.  All clients can produce a
null terminated name, and the system api's require null terminated 
strings anyway.

llvm-svn: 49041
 2008-04-01 18:04:03 +00:00
Chris Lattner
7f88d9043f Reimplement MemoryBuffer::getFile with three enhancements: 
1) stop using MappedFile.
2) if profitable use the sys::path::MapInFilePages api to
   read the file.
3) otherwise fallback to read.

When sys::path::MapInFilePages is implemented, this provides
several benefits:

#1: this avoids fragmenting memory for small files.
#2: this avoids extraneous stat calls when the file size is known.
#3: this only keeps the file descriptor open while reading the 
    file, not for the duration of the lifetime of the memory 
    buffer.  This fixes a serious clang FD 'leak' problem.

I believe that this will work on a win32 machine, but I don't have
one to test on.  I'd appreciate it if someone could check.

llvm-svn: 49031
 2008-04-01 06:05:21 +00:00
Chris Lattner
b29e4e90bc Remove the MappedFile::charBase member, rename base -> getBase() and 
make getBase() return a const-correct pointer.

llvm-svn: 49025
 2008-04-01 03:40:53 +00:00
Chris Lattner
f2309c208a Remove MappedFile support for mapping files for write and exec 
and shared.  This complicates the design, is not used, and probably
doesn't even work.

llvm-svn: 49022
 2008-04-01 03:10:22 +00:00
Chris Lattner
ad9a6ccb83 Remove attribution from file headers, per discussion on llvmdev. 
llvm-svn: 45418
 2007-12-29 20:36:04 +00:00
Chris Lattner
56d872fcbb Fix the Linker testcase regressions, by making MemoryBuffer::getFileOrSTDIN return 
a valid but empty buffer if stdin is empty.

llvm-svn: 44219
 2007-11-18 18:52:28 +00:00
Chris Lattner
a65ec649fd Add new MemoryBuffer::getMemBufferCopy method. 
llvm-svn: 42815
 2007-10-09 21:46:38 +00:00
Reid Spencer
e8aa5a5832 Make getSTDIN return null if the standard input is empty, as the header file 
documentation implies and as its uses depend.

llvm-svn: 40939
 2007-08-08 20:01:58 +00:00
Nick Lewycky
61fa7b9861 Fix undefined behaviour reported by the new --enable-expensive-checks option. 
llvm-svn: 37829
 2007-07-01 03:06:30 +00:00
Chris Lattner
b601311b07 fix a memory leak 
llvm-svn: 36981
 2007-05-11 00:43:26 +00:00
Jeff Cohen
2e8263c013 Unbreak VC++ build. 
llvm-svn: 36901
 2007-05-07 15:21:46 +00:00
Chris Lattner
112d26a164 Enhance MemoryBuffer to return error messages in strings if they occur. 
llvm-svn: 36899
 2007-05-06 23:32:36 +00:00
Chris Lattner
9fa29b4027 Fix MemoryBuffer::getFile to return null if it has an error opening the 
file instead of aborting.

llvm-svn: 36858
 2007-05-06 07:24:46 +00:00
Jeff Cohen
7cfc4b404f Fix MemoryBuffer breakage correctly. 
llvm-svn: 36561
 2007-04-29 14:43:31 +00:00
Jeff Cohen
349056458a Unbreak build. 
llvm-svn: 36559
 2007-04-29 14:21:44 +00:00
Chris Lattner
4749cca517 Add a new memorybuffer class, to unify all the file reading code in the system 
llvm-svn: 36553
 2007-04-29 06:58:52 +00:00