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* Handle very large stack tracesLeonard Mosescu2017-07-121-10/+6
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | The main motivation for this change is to handle very large stack traces, normally the result of infinite recursion. This part is actually fairly simple, relaxing a few self-imposed limits on how many frames we can unwind and the max size for stack memory. Relaxing these limits requires stricter and more consistent checks for stack unwinding. There are a number of unwinding invariants that apply to all the platforms: 1. stack pointer (and frame pointer) must be within the stack memory (frame pointer, if preset, must point to the right frame too) 2. unwinding must monotonically increase SP (except for the first frame unwind, this must be a strict increase) 3. Instruction pointer (return address) must point to a valid location 4. stack pointer (and frame pointer) must be appropriately aligned This change is focused on 2), which is enough to guarantee that the unwinding doesn't get stuck in an infinite loop. 1) is implicitly validated part of accessing the stack memory (explicit checks might be nice though). 4) is ABI specific and while it may be valuable in catching suspicious frames is not in the scope of this change. 3) is also an interesting check but thanks to just-in-time compilation it's more complex than just calling StackWalker::InstructionAddressSeemsValid() and we don't want to drop parts of the callstack due to an overly conservative check. Bug: chromium:735989 Change-Id: I9aaba77c7fd028942d77c87d51b5e6f94e136ddd Reviewed-on: https://chromium-review.googlesource.com/563771 Reviewed-by: Mark Mentovai <mark@chromium.org> Reviewed-by: Ivan Penkov <ivanpe@chromium.org>
* Allow setting a limit on the number of frames to be recovered by stack scanning.ted.mielczarek@gmail.com2013-08-191-2/+3
| | | | | | Patch by Julian Seward <jseward@acm.org> R=ted at https://bugzilla.mozilla.org/show_bug.cgi?id=894264 git-svn-id: http://google-breakpad.googlecode.com/svn/trunk@1206 4c0a9323-5329-0410-9bdc-e9ce6186880e
* More robust stack walks when the IP address in the context frame is invalid ↵ivan.penkov@gmail.com2013-06-261-7/+1
| | | | | | | | | | | | | (or not in a known module). This is achieved by: 1. Extending the span of the scan for return address in the conext frame. Initially, I wanted to extend the span of the scan for all frames but then I noticed that there is code for ARM already that is extending the search only for the context frame. This kind of makes sense so I decided to reuse the same idea everywhere. 2. Attempting to restore the EBP chain after a successful scan for return address so that the stackwalker can switch back to FRAME_TRUST_CFI for the rest of the frames when possible. I also fixed the lint errors in the files touched. Review URL: https://breakpad.appspot.com/605002 git-svn-id: http://google-breakpad.googlecode.com/svn/trunk@1193 4c0a9323-5329-0410-9bdc-e9ce6186880e
* Use stdint types everywhereted.mielczarek@gmail.com2013-03-061-11/+11
| | | | | | R=mark at https://breakpad.appspot.com/535002/ git-svn-id: http://google-breakpad.googlecode.com/svn/trunk@1121 4c0a9323-5329-0410-9bdc-e9ce6186880e
* Move scoped_ptr.h to commonted.mielczarek@gmail.com2013-01-171-1/+1
| | | | | | R=mark at https://breakpad.appspot.com/509002/ git-svn-id: http://google-breakpad.googlecode.com/svn/trunk@1096 4c0a9323-5329-0410-9bdc-e9ce6186880e
* Allow StackwalkerARM to scan much farther to find the caller of the context ↵ted.mielczarek@gmail.com2012-12-041-1/+8
| | | | | | | | frame R=jimb at https://breakpad.appspot.com/501002/ git-svn-id: http://google-breakpad.googlecode.com/svn/trunk@1086 4c0a9323-5329-0410-9bdc-e9ce6186880e
* Allow processing dumps with missing stack memory for some threadsted.mielczarek@gmail.com2012-11-061-2/+2
| | | | | | r=mkrebs at https://breakpad.appspot.com/413002/ git-svn-id: http://google-breakpad.googlecode.com/svn/trunk@1077 4c0a9323-5329-0410-9bdc-e9ce6186880e
* Refactor the logic of resolving source line info into helper class.SiyangXie@gmail.com2012-10-101-27/+28
| | | | | | | http://breakpad.appspot.com/459002/ git-svn-id: http://google-breakpad.googlecode.com/svn/trunk@1068 4c0a9323-5329-0410-9bdc-e9ce6186880e
* Use frame pointer to walk ARM stack on iOS.qsr@chromium.org2011-10-171-10/+69
| | | | | | Review URL: http://breakpad.appspot.com/314001 git-svn-id: http://google-breakpad.googlecode.com/svn/trunk@869 4c0a9323-5329-0410-9bdc-e9ce6186880e
* Fix some apparently longstanding crash bugs in Stackwalker implementations ↵ted.mielczarek2011-01-241-2/+2
| | | | | | | | when resolver is NULL. R=mark at http://breakpad.appspot.com/257001 git-svn-id: http://google-breakpad.googlecode.com/svn/trunk@761 4c0a9323-5329-0410-9bdc-e9ce6186880e
* Add stack-scanning fallback to Stackwalker{AMD64,ARM}.ted.mielczarek2010-10-011-17/+64
| | | | | | R=jimb at http://breakpad.appspot.com/206001/show git-svn-id: http://google-breakpad.googlecode.com/svn/trunk@704 4c0a9323-5329-0410-9bdc-e9ce6186880e
* Refactor some bits of StackWalkerX86 / StackFrameX86 out into their ↵ted.mielczarek2010-10-011-0/+2
| | | | | | | | respective parent classes so they can be used by other architecture implementations. R=jimb at http://breakpad.appspot.com/205001/show git-svn-id: http://google-breakpad.googlecode.com/svn/trunk@703 4c0a9323-5329-0410-9bdc-e9ce6186880e
* Breakpad: Support DWARF CFI-driven stack walking on ARM.jimblandy2010-03-161-8/+106
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | This patch allows the Breakpad minidump processor to use data from STACK CFI records to generate stack traces for the ARM processor. In the symbol dumper, we need a table mapping DWARF CFI register numbers to their names: STACK CFI records refer to registers by name. In the processor, we expand StackwalkerARM::GetCallerFrame to see if there are STACK CFI records covering the callee, and then use those to recover the caller's register values. There's no good reason the ARM walker couldn't use the SimpleCFIWalker interface declared in cfi_frame_info.h. Unfortunately, that interface assumes that one can map register names to member pointers of the raw context type, while MDRawContextARM uses an array to hold the registers' values: C++ pointer-to-member types can't refer to elements of member arrays. So we have to write out SimpleCFIWalker::FindCallerRegisters in StackwalkerARM::GetCallerFrame. We define enum MDARMRegisterNumbers in minidump_cpu_arm.h, for convenience in referring to certain ARM registers with dedicated purposes, like the stack pointer and the PC. We define validity flags in StackFrameARM for all the registers, since CFI could theoretically recover any of them. In the same vein, we expand minidump_stackwalk.cc to print the values of all valid callee-saves registers in the context --- and use the proper names for special-purpose registers. We provide unit tests that give full code and branch coverage (with minor exceptions). We add a testing interface to StackwalkerARM that allows us to create context frames that lack some register values. a=jimblandy, r=mmentovai git-svn-id: http://google-breakpad.googlecode.com/svn/trunk@553 4c0a9323-5329-0410-9bdc-e9ce6186880e
* Breakpad: Update copyright notice years on all files changed in 2010.jimblandy2010-02-091-1/+1
| | | | | | | | | | We've gotten mixed advice from the lawyery types about whether this matters. But it's easy enough to do. a=jimblandy, r=nealsid git-svn-id: http://google-breakpad.googlecode.com/svn/trunk@517 4c0a9323-5329-0410-9bdc-e9ce6186880e
* Breakpad processor: Don't pass Windows stack walking information to all walkers.jimblandy2010-01-141-3/+1
| | | | | | | | | | | | | | | | | | | | | At the moment, the StackWalker GetCallerFrame member function expects a vector of WindowsFrameInfo structures, even though WindowsFrameInfo is only used or useful on one one implementation (StackWalkerX86). This patch changes StackWalker::GetCallerFrame to no longer expect the WindowsFrameInfo structures, and changes all implementations to match. In particular, StackWalkerX86 is changed to find the WindowsFrameInfo data itself, and store a pointer to whatever it got in the StackFrame object itself (which is really a StackFrameX86). To allow GetCallerFrame implementations to look up stack walking data, StackWalker::resolver_ needs to be made protected, not private. a=jimblandy, r=mmentovai git-svn-id: http://google-breakpad.googlecode.com/svn/trunk@491 4c0a9323-5329-0410-9bdc-e9ce6186880e
* Breakpad: Avoid warnings building with G++ 4.4.1 using -O3 -Wall.jimblandy2010-01-121-3/+0
| | | | | | | | | | | src/processor/minidump.cc:1067: warning: format ‘%llx’ expects type ‘long long unsigned int’, but argument 3 has type ‘unsigned int’ src/processor/stackwalker_arm.cc:83: warning: unused variable ‘last_frame’ src/processor/minidump_stackwalk.cc:163: warning: ‘trust_name’ may be used uninitialized in this function a=jimblandy, r=ted.mielczarek git-svn-id: http://google-breakpad.googlecode.com/svn/trunk@481 4c0a9323-5329-0410-9bdc-e9ce6186880e
* Issue 49012: Breakpad Processor: Rename 'StackFrameInfo' structure to ↵jimblandy2009-12-231-1/+1
| | | | | | | | | | | | | | | 'WindowsFrameInfo'. Also, rename stack_frame_info.h to windows_frame_info.h. If it seems odd to have functions like FillSourceLineInfo returning Windows-specific data structures... well, it is! This patch just makes it more obvious what's going on. a=jimblandy, r=nealsid git-svn-id: http://google-breakpad.googlecode.com/svn/trunk@471 4c0a9323-5329-0410-9bdc-e9ce6186880e
* Basic arm cpu support for processor. r=mark at http://breakpad.appspot.com/49011ted.mielczarek2009-12-191-0/+92
git-svn-id: http://google-breakpad.googlecode.com/svn/trunk@454 4c0a9323-5329-0410-9bdc-e9ce6186880e
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