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104 Commits

Author SHA1 Message Date
Bill Wendling 863bab689a Remove the `hasFnAttr' method from Function. 
The hasFnAttr method has been replaced by querying the Attributes explicitly. No
intended functionality change.

llvm-svn: 164725
 2012-09-26 21:48:26 +00:00
Chad Rosier d269bd8c24 Add support for the --param ssp-buffer-size= driver option. 
PR9673

llvm-svn: 162284
 2012-08-21 16:15:24 +00:00
Bill Wendling bfb9b7598d Implement stack protectors for structures with character arrays in them. 
<rdar://problem/10545247>

llvm-svn: 162131
 2012-08-17 20:59:56 +00:00
Bill Wendling 49aeb5cc5d Whitespace cleanup. 
llvm-svn: 161788
 2012-08-13 21:20:43 +00:00
Bill Wendling 61396b81a4 For non-Darwin platforms, we want to generate stack protectors only for 
character arrays. This is in line with what GCC does.
<rdar://problem/10529227>

llvm-svn: 161446
 2012-08-07 20:59:05 +00:00
Bob Wilson ebb44646c4 Enable stack protectors for all arrays, not just char arrays. rdar://5875909 
Patch by Bill Wendling.

llvm-svn: 145097
 2011-11-23 07:13:56 +00:00
Chris Lattner 229907cd11 land David Blaikie's patch to de-constify Type, with a few tweaks. 
llvm-svn: 135375
 2011-07-18 04:54:35 +00:00
Jay Foad 5bd375a6cc Convert CallInst and InvokeInst APIs to use ArrayRef. 
llvm-svn: 135265
 2011-07-15 08:37:34 +00:00
Bill Wendling dd1cf3279e Inline check that's used only once. 
llvm-svn: 128465
 2011-03-29 17:12:55 +00:00
Bill Wendling fb63d55fe8 Rework the logic (and removing the bad check for an unreachable block) so that 
the FailBB dominator is correctly calculated. Believe it or not, there isn't a
functionality change here.

llvm-svn: 128455
 2011-03-29 07:28:52 +00:00
Bill Wendling 220c9f045b Don't try to add stack protector logic to a dead basic block. It messes up 
dominator information.

llvm-svn: 128452
 2011-03-29 05:15:48 +00:00
Bill Wendling 96f962fdff In some cases, the "fail BB dominator" may be null after the BB was split (and 
becomes reachable when before it wasn't). Check to make sure that it's not null
before trying to use it.

llvm-svn: 128434
 2011-03-28 23:02:18 +00:00
Cameron Zwarich 4d7d728594 Fix the GCC test suite issue exposed by r127477, which was caused by stack 
protector insertion not working correctly with unreachable code. Since that
revision was rolled out, this test doesn't actual fail before this fix.

llvm-svn: 127497
 2011-03-11 21:51:56 +00:00
Cameron Zwarich 84986b298a Make more passes preserve dominators (or state that they preserve dominators if 
they all ready do). This removes two dominator recomputations prior to isel,
which is a 1% improvement in total llc time for 403.gcc.

The only potentially suspect thing is making GCStrategy recompute dominators if
it used a custom lowering strategy.

llvm-svn: 123064
 2011-01-08 17:01:52 +00:00
Owen Anderson 6c18d1aac0 Get rid of static constructors for pass registration. Instead, every pass exposes an initializeMyPassFunction(), which 
must be called in the pass's constructor.  This function uses static dependency declarations to recursively initialize
the pass's dependencies.

Clients that only create passes through the createFooPass() APIs will require no changes.  Clients that want to use the
CommandLine options for passes will need to manually call the appropriate initialization functions in PassInitialization.h
before parsing commandline arguments.

I have tested this with all standard configurations of clang and llvm-gcc on Darwin.  It is possible that there are problems
with the static dependencies that will only be visible with non-standard options.  If you encounter any crash in pass
registration/creation, please send the testcase to me directly.

llvm-svn: 116820
 2010-10-19 17:21:58 +00:00
Owen Anderson df7a4f2515 Now with fewer extraneous semicolons! 
llvm-svn: 115996
 2010-10-07 22:25:06 +00:00
Owen Anderson a7aed18624 Reapply r110396, with fixes to appease the Linux buildbot gods. 
llvm-svn: 110460
 2010-08-06 18:33:48 +00:00
Owen Anderson bda59bd247 Revert r110396 to fix buildbots. 
llvm-svn: 110410
 2010-08-06 00:23:35 +00:00
Owen Anderson 755aceb5d0 Don't use PassInfo* as a type identifier for passes. Instead, use the address of the static 
ID member as the sole unique type identifier.  Clean up APIs related to this change.

llvm-svn: 110396
 2010-08-05 23:42:04 +00:00
Owen Anderson a57b97e7e7 Fix batch of converting RegisterPass<> to INTIALIZE_PASS(). 
llvm-svn: 109045
 2010-07-21 22:09:45 +00:00
Chris Lattner dde2ba0b60 tighten up this code. 
llvm-svn: 107670
 2010-07-06 15:59:27 +00:00
Eric Christopher 2ad0c779c3 Fix up -fstack-protector on linux to use the segment 
registers.  Split out testcases per architecture and os
now.

Patch from Nelson Elhage.

llvm-svn: 107640
 2010-07-06 05:18:56 +00:00
Duncan Sands 9dff9bec31 Uniformize the names of type predicates: rather than having isFloatTy and 
isInteger, we now have isFloatTy and isIntegerTy.  Requested by Chris!

llvm-svn: 96223
 2010-02-15 16:12:20 +00:00
Benjamin Kramer d2564e3afb Move remaining stuff to the isInteger predicate. 
llvm-svn: 92771
 2010-01-05 21:05:54 +00:00
Nick Lewycky 02d5f77d26 Remove VISIBILITY_HIDDEN from class/struct found inside anonymous namespaces. 
Chris claims we should never have visibility_hidden inside any .cpp file but
that's still not true even after this commit.

llvm-svn: 85042
 2009-10-25 06:33:48 +00:00
Bill Wendling 6aea1a2a5a Neuter stack protectors by only checking character arrays. This is what GCC 
does.

llvm-svn: 84916
 2009-10-23 00:01:05 +00:00
Owen Anderson 55f1c09e31 Push LLVMContexts through the IntegerType APIs. 
llvm-svn: 78948
 2009-08-13 21:58:54 +00:00
Owen Anderson 4fdeba9706 Revert yesterday's change by removing the LLVMContext parameter to AllocaInst and MallocInst. 
llvm-svn: 75863
 2009-07-15 23:53:25 +00:00
Owen Anderson b6b2530000 Move EVER MORE stuff over to LLVMContext. 
llvm-svn: 75703
 2009-07-14 23:09:55 +00:00
Owen Anderson 1e5f00e7a7 This started as a small change, I swear. Unfortunately, lots of things call the [I|F]CmpInst constructors. Who knew!? 
llvm-svn: 75200
 2009-07-09 23:48:35 +00:00
Duncan Sands af9eaa830a Rename PaddedSize to AllocSize, in the hope that this 
will make it more obvious what it represents, and stop
it being confused with the StoreSize.

llvm-svn: 71349
 2009-05-09 07:06:46 +00:00
Bill Wendling 6d8472b9cc When we split a basic block, there's a default branch to the newly created BB. 
Delete this default branch, because we're going to generate our own.

llvm-svn: 66234
 2009-03-06 01:41:15 +00:00
Duncan Sands dc020f9c3c Rename getABITypeSize to getTypePaddedSize, as 
suggested by Chris.

llvm-svn: 62099
 2009-01-12 20:38:59 +00:00
Bill Wendling 13020d22da Rename stackprotector_create intrinsic to stackprotector. 
llvm-svn: 59519
 2008-11-18 11:01:33 +00:00
Bill Wendling 7235002bd1 Remove the stackprotector_check intrinsic. Use a volatile load instead. 
llvm-svn: 59504
 2008-11-18 07:30:57 +00:00
Bill Wendling eeb0415980 - Use "moveAfter" instead of "remove/insert" of a basic block. 
- Use less indentation in coding.
- Shorten description.
- Update comments.
- Move code around

llvm-svn: 59496
 2008-11-18 05:32:11 +00:00
Bill Wendling ccb67a3d85 Implement stack protectors as function attributes: "ssp" and "sspreq". 
llvm-svn: 59202
 2008-11-13 01:02:14 +00:00
Bill Wendling cfa3e287bb Small simplification. Use the iterator already present as the insertion point. 
llvm-svn: 59008
 2008-11-10 23:38:59 +00:00
Bill Wendling 747f59f0f7 - Make sure that we don't over-increment the iterator when going through the 
basic blocks.
- Minor code clean-up.

llvm-svn: 59002
 2008-11-10 21:13:10 +00:00
Bill Wendling eb4268d72f - Modify the stack protector algorithm so that the stack slot is allocated in 
LLVM IR code and not in the selection DAG ISel. This is a cleaner solution.

- Fix the heuristic for determining if protectors are necessary. The previous
  one wasn't checking the proper type size.

llvm-svn: 58824
 2008-11-07 01:23:58 +00:00
Bill Wendling 87d0746e71 Remove unneeded header file. 
llvm-svn: 58823
 2008-11-06 23:56:59 +00:00
Bill Wendling a0826e1855 Don't build a vector of returns. Just modify the Function in the loop. 
llvm-svn: 58822
 2008-11-06 23:55:49 +00:00
Bill Wendling d939a7b305 The size limit is for individual arrays. So if any array has more than 8 bytes 
in it, then emit stack protectors.

llvm-svn: 58819
 2008-11-06 22:18:44 +00:00
Bill Wendling b3f7a39877 - Rename stackprotector_{prologue,epilogue} to stackprotector_{create,check}. 
- Get rid of "HasStackProtector" in MachineFrameInfo.
- Modify intrinsics to tell which are doing what with memory.

llvm-svn: 58799
 2008-11-06 07:23:03 +00:00
Bill Wendling 43de293d75 Adjust the stack protector heuristic to care about only arrays or calls to 
"alloca".

llvm-svn: 58792
 2008-11-06 02:38:58 +00:00
Bill Wendling d970ea3eac Implement the stack protector stack accesses via intrinsics: 
- stackprotector_prologue creates a stack object and stores the guard there.

- stackprotector_epilogue reads the stack guard from the stack position created
  by stackprotector_prologue.

- The PrologEpilogInserter was changed to make sure that the stack guard is
  first on the stack frame.

llvm-svn: 58791
 2008-11-06 02:29:10 +00:00
Bill Wendling db045a3048 Remove dead variable. 
llvm-svn: 58741
 2008-11-05 00:56:35 +00:00
Bill Wendling f1b4e2626b Simplify the allocated size calculation. 
llvm-svn: 58740
 2008-11-05 00:54:27 +00:00
Bill Wendling 75e38fedc8 Fix comment 
llvm-svn: 58739
 2008-11-05 00:46:15 +00:00
Bill Wendling 782e8346a5 Some code simplification. It now doesn't generate a prologue if the epilogue 
isn't going to be generated.

llvm-svn: 58734
 2008-11-05 00:00:21 +00:00
Bill Wendling d31fc54f34 Small simplification of the stack guard type. 
llvm-svn: 58728
 2008-11-04 22:54:43 +00:00
Bill Wendling 2f40956c68 - Add a "getOrInsertGlobal" method to the Module class. This acts similarly to 
"getOrInsertFunction" in that it either adds a new declaration of the global
  and returns it, or returns the current one -- optionally casting it to the
  correct type.
- Use the new getOrInsertGlobal in the stack protector code.
- Use "splitBasicBlock" in the stack protector code.

llvm-svn: 58727
 2008-11-04 22:51:24 +00:00
Bill Wendling 64adc71e9a Update in response to feedback from Chris: 
- Use enums instead of magic numbers.

- Rework algorithm to use the bytes size from the target to determine when to
  emit stack protectors.

- Get rid of "propolice" in any comments.

- Renamed an option to its expanded form.

- Other miscellanenous changes.

More changes will come after this.

llvm-svn: 58723
 2008-11-04 21:53:09 +00:00
Bill Wendling 05d8417fa0 Initial checkin for stack protectors. Here's what it does: 
* The prologue is modified to read the __stack_chk_guard global and insert it
  onto the stack.

* The epilogue is modified to read the stored guard from the stack and compare
  it to the original __stack_chk_guard value. If they differ, then the
  __stack_chk_fail() function is called.

* The stack protector needs to be first on the stack (after the parameters) to
  catch any stack-smashing activities.

Front-end support will follow after a round of beta testing.

llvm-svn: 58673
 2008-11-04 02:10:20 +00:00