is no reason not to keep it locally. Implemented a basic disassembler which can be used
to scan bytecode for interesting conditions. This should be pretty easy to add to for
things other than exploitability if there is a desire. This also adds several tests to
the windows exploitability ranking code to take advantage of the disassembler for x86
code.
BUG=None
TEST=DisassemblerX86Test.*
Review URL: http://breakpad.appspot.com/203001
git-svn-id: http://google-breakpad.googlecode.com/svn/trunk@705 4c0a9323-5329-0410-9bdc-e9ce6186880e
The google_breakpad::TestAssembler classes are used in both the processor's
and the Linux dumper's test suites, and will soon be used in the Mac
dumper's tests as well. This patch moves their source files from
src/processor to src/common.
a=jimblandy, r=thestig
git-svn-id: http://google-breakpad.googlecode.com/svn/trunk@574 4c0a9323-5329-0410-9bdc-e9ce6186880e
This adds support for 'STACK CFI' records (DWARF CFI) to the AMD64
stack walker. This is necessary for the stack trace to include any
frames other than the youngest. Unit tests are included.
a=jimblandy, r=mmentovai
git-svn-id: http://google-breakpad.googlecode.com/svn/trunk@554 4c0a9323-5329-0410-9bdc-e9ce6186880e
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
Add a CFIFrameInfo class (named for symmetry with WindowsFrameInfo) to
represent the set of STACK CFI rules in effect at a given instruction,
and apply them to a set of register values. Provide a SimpleCFIWalker
class template, to allow the essential CFI code to be shared amongst
the different architectures.
Teach BasicSourceLineResolver to partially parse 'STACK CFI' records,
and produce the set of rules in effect at a given instruction on
demand, by combining the initial rule set and the appropriate rule
deltas in a CFIFrameInfo object.
Adapt StackwalkerX86 and StackFrameX86 to retrieve, store, and apply
CFI stack walking information.
Add validity flags for all the general-purpose registers to
StackFrameX86::ContextValidity.
a=jimblandy, r=mmentovai
git-svn-id: http://google-breakpad.googlecode.com/svn/trunk@549 4c0a9323-5329-0410-9bdc-e9ce6186880e
Issue 53001 (http://breakpad.appspot.com/53001) defines the
TestAssembler classes; those, along with a new set of mock classes
defined in stackwalker_unittest_utils.h, make it possible for us to
actually do proper unit testing of a stack walker. These tests get us
full code coverage for stackwalker_x86.cc.
a=jimblandy, r=mmentovai
git-svn-id: http://google-breakpad.googlecode.com/svn/trunk@548 4c0a9323-5329-0410-9bdc-e9ce6186880e
This also adds two new test utility class groups, TestAssembler and
SynthMinidump. These are overkill for what I'm doing with them here
(and may simply be overkill, period), but they make it easy to write
unit tests for code that works on binary files or raw memory contents
in a cross-platform way. I'm planning to use them for the DWARF CFI
unwinding tests and the DWARF CFI parser tests.
a=jimblandy, r=nealsid
git-svn-id: http://google-breakpad.googlecode.com/svn/trunk@547 4c0a9323-5329-0410-9bdc-e9ce6186880e
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
- Introduces a standard API for dealing with modules. MinidumpModule
is now a concrete implementation of this API. Code may interact with
single modules using the CodeModule interface, and collections of
modules using its container, the CodeModules interface.
- CodeModule is used directly by SymbolSupplier implementations and
SourceLineResolver. Reliance on the specific implementation in
MinidumpModule has been eliminated.
- Module lists are now added to ProcessState objects. Module references
in each stack frame are now pointers to objects in these module lists.
- The sample minidump_stackwalk tool prints the module list after printing
all threads' stacks.
http://groups.google.com/group/airbag-dev/browse_frm/thread/a9c0550edde54cf8
git-svn-id: http://google-breakpad.googlecode.com/svn/trunk@74 4c0a9323-5329-0410-9bdc-e9ce6186880e
- minidump_stackwalk is now much more useful as a debugging tool and
even as a standalone tool.
- Reimplementation of minidump_stackwalk around MinidumpProcessor.
- minidump_stackwalk displays all pertinent information returned by
MinidumpProcessor in the ProcessState.
- New PathnameStripper::File static utility method to display only the
leaf file name in a pathname, cleaning up minidump_stackwalk's output.
- New SimpleSymbolSupplier class, which implements a simple
filesystem-based symbol supplier compatible with the layout used by
Microsoft Symbol Server and its client cache.
- minidump_stackwalk now accepts an optional second argument, a pathname
to use as a symbol directory for a SimpleSymbolSupplier.
- Updated test data to be compatible with SimpleSymbolSupplier, and added
test data for kernel32.pdb. Test data converted from CRLF line endings
to LF.
http://groups.google.com/group/airbag-dev/browse_thread/thread/cce30a84f6b2d728
git-svn-id: http://google-breakpad.googlecode.com/svn/trunk@53 4c0a9323-5329-0410-9bdc-e9ce6186880e
- MinidumpProcessor now processes all threads and returns a new ProcessState
object. (Interface change.)
- ProcessState contains a CallStack for each thread in the process, and
additional information about whether the process crashed, which thread
crashed, the reason for the crash, and identifying attributes for the
OS and CPU.
- MinidumpSystemInfo now contains a GetCPUVendor() method that returns the
vendor information from CPUID 0 on x86 processors ("GenuineIntel").
http://groups.google.com/group/airbag-dev/browse_thread/thread/16dd2c981e3361ba
git-svn-id: http://google-breakpad.googlecode.com/svn/trunk@47 4c0a9323-5329-0410-9bdc-e9ce6186880e
- PDBSourceLineWriter (dump_syms) outputs stack frame debugging information
- SourceLineResolver reads the new information and puts it into a
new StackFrameInfo structure, which is stored in a ContainedRangeMap.
FillSourceLineInfo passes the StackFrameInfo back to the caller.
- The base Stackwalker makes StackFrameInfo data available to subclasses
during stackwalking, but does not use this information directly itself.
Stackwalkers may access stack_frame_info_ for enhanced stackwalking
(this will be part 4).
- New test data for the updated dumped-symbol format
http://groups.google.com/group/airbag-dev/browse_thread/thread/735f191c9a1a1de4
git-svn-id: http://google-breakpad.googlecode.com/svn/trunk@38 4c0a9323-5329-0410-9bdc-e9ce6186880e
- Test StackwalkerX86 and StackwalkerPPC on the current process, if built
by a supported compiler (gcc) on a supported (walkable) CPU (x86, ppc).
- This test is not enabled by default because of certain optimizations
that interfere with it (stack frame reuse, frame pointer omission). See
the comments at the top of stackwalker_selftest.cc. To enable this
test in the standard "make check" suite, configure with --enable-selftest.
http://groups.google.com/group/airbag-dev/browse_thread/thread/2ca1c8e72c809bec
git-svn-id: http://google-breakpad.googlecode.com/svn/trunk@35 4c0a9323-5329-0410-9bdc-e9ce6186880e
