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path: root/lib/CodeGen/StackProtector.cpp
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* Reformat code with clang-format.Josh Magee2013-10-30
| | | | | | | Differential Revision: http://llvm-reviews.chandlerc.com/D2057 git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@193672 91177308-0d34-0410-b5e6-96231b3b80d8
* [stackprotector] Update the StackProtector pass to perform datalayout analysis.Josh Magee2013-10-29
| | | | | | | | | | | | | | | | This modifies the pass to classify every SSP-triggering AllocaInst according to an SSPLayoutKind (LargeArray, SmallArray, AddrOf). This analysis is collected by the pass and made available for use, but no other pass uses it yet. The next patch will make use of this analysis in PEI and StackSlot passes. The end goal is to support ssp-strong stack layout rules. WIP. Differential Revision: http://llvm-reviews.chandlerc.com/D1789 git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@193653 91177308-0d34-0410-b5e6-96231b3b80d8
* [stackprotector] Refactor the StackProtector pass from a single .cpp file ↵Josh Magee2013-09-27
| | | | | | | | | | | | | | | into StackProtector.h and StackProtector.cpp. No functionality change. Future patches will add analysis which will be used in other passes (PEI, StackSlot). The end goal is to support ssp-strong stack layout rules. WIP. Differential Revision: http://llvm-reviews.chandlerc.com/D1521 git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@191570 91177308-0d34-0410-b5e6-96231b3b80d8
* [stackprotector] Modernize code with IRBuilderBenjamin Kramer2013-09-09
| | | | git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@190317 91177308-0d34-0410-b5e6-96231b3b80d8
* [stackprotector] Small cleanup.Michael Gottesman2013-08-20
| | | | git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@188772 91177308-0d34-0410-b5e6-96231b3b80d8
* [stackprotector] Small Bit of computation hoisting.Michael Gottesman2013-08-20
| | | | git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@188771 91177308-0d34-0410-b5e6-96231b3b80d8
* [stackprotector] Added significantly longer comment to FindPotentialTailCall ↵Michael Gottesman2013-08-20
| | | | | | to make clear its relationship to llvm::isInTailCallPosition. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@188770 91177308-0d34-0410-b5e6-96231b3b80d8
* Removed trailing whitespace.Michael Gottesman2013-08-20
| | | | git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@188769 91177308-0d34-0410-b5e6-96231b3b80d8
* [stackprotector] Removed stale TODO.Michael Gottesman2013-08-20
| | | | git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@188768 91177308-0d34-0410-b5e6-96231b3b80d8
* [stackprotector] Added support for emitting the llvm intrinsic stack ↵Michael Gottesman2013-08-20
| | | | | | | | protector check. rdar://13935163 git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@188766 91177308-0d34-0410-b5e6-96231b3b80d8
* [stackprotector] Simplify SP Pass so that we emit different fail basic ↵Michael Gottesman2013-08-09
| | | | | | | | | | | | | blocks for each fail condition. This patch decouples the stack protector pass so that we can support stack protector implementations that do not use the IR level generated stack protector fail basic block. No codesize increase is caused by this change since the MI level tail merge pass properly merges together the fail condition blocks (see the updated test). git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@188105 91177308-0d34-0410-b5e6-96231b3b80d8
* [stackprotector] Refactored ssp prologue creation code into its own helper ↵Michael Gottesman2013-07-22
| | | | | | | | | | function. No functionality change. rdar://13935163 git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@186868 91177308-0d34-0410-b5e6-96231b3b80d8
* Recommit r186217 with testcase fix:Bill Wendling2013-07-22
| | | | | | | | | | | Use the function attributes to pass along the stack protector buffer size. Now that we have robust function attributes, don't use a command line option to specify the stack protecto buffer size. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@186863 91177308-0d34-0410-b5e6-96231b3b80d8
* Revert commit r186217 -- this is breaking bots:Chandler Carruth2013-07-13
| | | | | | | | | | http://lab.llvm.org:8013/builders/clang-x86_64-darwin11-nobootstrap-RAincremental/builds/4328 Original commit log: Use the function attributes to pass along the stack protector buffer size. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@186234 91177308-0d34-0410-b5e6-96231b3b80d8
* Use the function attributes to pass along the stack protector buffer size.Bill Wendling2013-07-12
| | | | | | | | Now that we have robust function attributes, don't use a command line option to specify the stack protecto buffer size. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@186217 91177308-0d34-0410-b5e6-96231b3b80d8
* Access the TargetLoweringInfo from the TargetMachine object instead of ↵Bill Wendling2013-06-19
| | | | | | caching it. The TLI may change between functions. No functionality change. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@184349 91177308-0d34-0410-b5e6-96231b3b80d8
* Support OpenBSD's native frame protection conventions.Rafael Espindola2013-06-07
| | | | | | | | | | | | | | | OpenBSD's stack smashing protection differs slightly from other platforms: 1. The smash handler function is "__stack_smash_handler(const char *funcname)" instead of "__stack_chk_fail(void)". 2. There's a hidden "long __guard_local" object that gets linked into each executable and DSO. Patch by Matthew Dempsky. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@183533 91177308-0d34-0410-b5e6-96231b3b80d8
* Remove unused #includes.Bill Wendling2013-03-05
| | | | git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@176467 91177308-0d34-0410-b5e6-96231b3b80d8
* Add the heuristic to differentiate SSPStrong from SSPRequired.Bill Wendling2013-01-23
| | | | | | | | | | | | | | | | | | | The requirements of the strong heuristic are: * A Protector is required for functions which contain an array, regardless of type or length. * A Protector is required for functions which contain a structure/union which contains an array, regardless of type or length. Note, there is no limit to the depth of nesting. * A protector is required when the address of a local variable (i.e., stack based variable) is exposed. (E.g., such as through a local whose address is taken as part of the RHS of an assignment or a local whose address is taken as part of a function argument.) git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@173231 91177308-0d34-0410-b5e6-96231b3b80d8
* Add the IR attribute 'sspstrong'.Bill Wendling2013-01-23
| | | | | | | | | | | | | | | | | | | | | | SSPStrong applies a heuristic to insert stack protectors in these situations: * A Protector is required for functions which contain an array, regardless of type or length. * A Protector is required for functions which contain a structure/union which contains an array, regardless of type or length. Note, there is no limit to the depth of nesting. * A protector is required when the address of a local variable (i.e., stack based variable) is exposed. (E.g., such as through a local whose address is taken as part of the RHS of an assignment or a local whose address is taken as part of a function argument.) This patch implements the SSPString attribute to be equivalent to SSPRequired. This will change in a subsequent patch. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@173230 91177308-0d34-0410-b5e6-96231b3b80d8
* Split TargetLowering into a CodeGen and a SelectionDAG part.Benjamin Kramer2013-01-11
| | | | | | | | | This fixes some of the cycles between libCodeGen and libSelectionDAG. It's still a complete mess but as long as the edges consist of virtual call it doesn't cause breakage. BasicTTI did static calls and thus broke some build configurations. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@172246 91177308-0d34-0410-b5e6-96231b3b80d8
* Move all of the header files which are involved in modelling the LLVM IRChandler Carruth2013-01-02
| | | | | | | | | | | | | | | | | | | | | into their new header subdirectory: include/llvm/IR. This matches the directory structure of lib, and begins to correct a long standing point of file layout clutter in LLVM. There are still more header files to move here, but I wanted to handle them in separate commits to make tracking what files make sense at each layer easier. The only really questionable files here are the target intrinsic tablegen files. But that's a battle I'd rather not fight today. I've updated both CMake and Makefile build systems (I think, and my tests think, but I may have missed something). I've also re-sorted the includes throughout the project. I'll be committing updates to Clang, DragonEgg, and Polly momentarily. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@171366 91177308-0d34-0410-b5e6-96231b3b80d8
* Remove the Function::getFnAttributes method in favor of using the AttributeSetBill Wendling2012-12-30
| | | | | | | | | | directly. This is in preparation for removing the use of the 'Attribute' class as a collection of attributes. That will shift to the AttributeSet class instead. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@171253 91177308-0d34-0410-b5e6-96231b3b80d8
* Rename the 'Attributes' class to 'Attribute'. It's going to represent a ↵Bill Wendling2012-12-19
| | | | | | single attribute in the future. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@170502 91177308-0d34-0410-b5e6-96231b3b80d8
* Use the new script to sort the includes of every file under lib.Chandler Carruth2012-12-03
| | | | | | | | | | | | | | | | | 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. =] git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@169131 91177308-0d34-0410-b5e6-96231b3b80d8
* Create enums for the different attributes.Bill Wendling2012-10-09
| | | | | | | | We use the enums to query whether an Attributes object has that attribute. The opaque layer is responsible for knowing where that specific attribute is stored. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@165488 91177308-0d34-0410-b5e6-96231b3b80d8
* Move TargetData to DataLayout.Micah Villmow2012-10-08
| | | | git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@165402 91177308-0d34-0410-b5e6-96231b3b80d8
* Remove the `hasFnAttr' method from Function.Bill Wendling2012-09-26
| | | | | | | | The hasFnAttr method has been replaced by querying the Attributes explicitly. No intended functionality change. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@164725 91177308-0d34-0410-b5e6-96231b3b80d8
* Add support for the --param ssp-buffer-size= driver option.Chad Rosier2012-08-21
| | | | | | PR9673 git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@162284 91177308-0d34-0410-b5e6-96231b3b80d8
* Implement stack protectors for structures with character arrays in them.Bill Wendling2012-08-17
| | | | | | | <rdar://problem/10545247> git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@162131 91177308-0d34-0410-b5e6-96231b3b80d8
* Whitespace cleanup.Bill Wendling2012-08-13
| | | | git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@161788 91177308-0d34-0410-b5e6-96231b3b80d8
* For non-Darwin platforms, we want to generate stack protectors only forBill Wendling2012-08-07
| | | | | | | | character arrays. This is in line with what GCC does. <rdar://problem/10529227> git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@161446 91177308-0d34-0410-b5e6-96231b3b80d8
* Enable stack protectors for all arrays, not just char arrays. rdar://5875909Bob Wilson2011-11-23
| | | | | | Patch by Bill Wendling. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@145097 91177308-0d34-0410-b5e6-96231b3b80d8
* land David Blaikie's patch to de-constify Type, with a few tweaks.Chris Lattner2011-07-18
| | | | git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@135375 91177308-0d34-0410-b5e6-96231b3b80d8
* Convert CallInst and InvokeInst APIs to use ArrayRef.Jay Foad2011-07-15
| | | | git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@135265 91177308-0d34-0410-b5e6-96231b3b80d8
* Inline check that's used only once.Bill Wendling2011-03-29
| | | | git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@128465 91177308-0d34-0410-b5e6-96231b3b80d8
* Rework the logic (and removing the bad check for an unreachable block) so thatBill Wendling2011-03-29
| | | | | | | | the FailBB dominator is correctly calculated. Believe it or not, there isn't a functionality change here. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@128455 91177308-0d34-0410-b5e6-96231b3b80d8
* Don't try to add stack protector logic to a dead basic block. It messes upBill Wendling2011-03-29
| | | | | | | dominator information. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@128452 91177308-0d34-0410-b5e6-96231b3b80d8
* In some cases, the "fail BB dominator" may be null after the BB was split (andBill Wendling2011-03-28
| | | | | | | | becomes reachable when before it wasn't). Check to make sure that it's not null before trying to use it. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@128434 91177308-0d34-0410-b5e6-96231b3b80d8
* Fix the GCC test suite issue exposed by r127477, which was caused by stackCameron Zwarich2011-03-11
| | | | | | | protector insertion not working correctly with unreachable code. Since that revision was rolled out, this test doesn't actual fail before this fix. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@127497 91177308-0d34-0410-b5e6-96231b3b80d8
* Make more passes preserve dominators (or state that they preserve dominators ifCameron Zwarich2011-01-08
| | | | | | | | | | | 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. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@123064 91177308-0d34-0410-b5e6-96231b3b80d8
* Get rid of static constructors for pass registration. Instead, every pass ↵Owen Anderson2010-10-19
| | | | | | | | | | | | | | | | | | 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. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@116820 91177308-0d34-0410-b5e6-96231b3b80d8
* Now with fewer extraneous semicolons!Owen Anderson2010-10-07
| | | | git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@115996 91177308-0d34-0410-b5e6-96231b3b80d8
* Reapply r110396, with fixes to appease the Linux buildbot gods.Owen Anderson2010-08-06
| | | | git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@110460 91177308-0d34-0410-b5e6-96231b3b80d8
* Revert r110396 to fix buildbots.Owen Anderson2010-08-06
| | | | git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@110410 91177308-0d34-0410-b5e6-96231b3b80d8
* Don't use PassInfo* as a type identifier for passes. Instead, use the ↵Owen Anderson2010-08-05
| | | | | | | | | address of the static ID member as the sole unique type identifier. Clean up APIs related to this change. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@110396 91177308-0d34-0410-b5e6-96231b3b80d8
* Fix batch of converting RegisterPass<> to INTIALIZE_PASS().Owen Anderson2010-07-21
| | | | git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@109045 91177308-0d34-0410-b5e6-96231b3b80d8
* tighten up this code.Chris Lattner2010-07-06
| | | | git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@107670 91177308-0d34-0410-b5e6-96231b3b80d8
* Fix up -fstack-protector on linux to use the segmentEric Christopher2010-07-06
| | | | | | | | | | registers. Split out testcases per architecture and os now. Patch from Nelson Elhage. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@107640 91177308-0d34-0410-b5e6-96231b3b80d8
* Uniformize the names of type predicates: rather than having isFloatTy andDuncan Sands2010-02-15
| | | | | | | isInteger, we now have isFloatTy and isIntegerTy. Requested by Chris! git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@96223 91177308-0d34-0410-b5e6-96231b3b80d8
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