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Mirror of Google Breakpad project
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jimblandy c609f474a9 Breakpad: Support DWARF CFI-driven stack walking on ARM. 
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
2010-03-16 16:46:22 +00:00
autotools Regenerate using automake-1.11.1, autoconf 2.65, and libtool 2.2.6b, 2010-02-02 17:39:51 +00:00
m4 ARM support, with some build system changes to support x86-64, arm, and i386 in an autoconf style build in Linux. The O2 build for the unit tests is still broken but I'm checking this in to unblock people 2010-03-02 00:39:48 +00:00
src Breakpad: Support DWARF CFI-driven stack walking on ARM. 2010-03-16 16:46:22 +00:00
aclocal.m4 Regenerate using automake-1.11.1, autoconf 2.65, and libtool 2.2.6b, 2010-02-02 17:39:51 +00:00
AUTHORS Make build system less annoying (#8) r=bryner 2006-08-30 20:05:05 +00:00
ChangeLog Initial import, which includes the Windows client-side dump_syms tool, and 2006-08-25 21:14:45 +00:00
configure ARM support, with some build system changes to support x86-64, arm, and i386 in an autoconf style build in Linux. The O2 build for the unit tests is still broken but I'm checking this in to unblock people 2010-03-02 00:39:48 +00:00
configure.ac ARM support, with some build system changes to support x86-64, arm, and i386 in an autoconf style build in Linux. The O2 build for the unit tests is still broken but I'm checking this in to unblock people 2010-03-02 00:39:48 +00:00
COPYING Relicense to BSD (#29). r=bryner 2006-09-20 21:16:16 +00:00
INSTALL Add logging to minidump processor (#82). First part: logging infrastructure 2007-05-17 18:34:37 +00:00
Makefile.am Breakpad: Support DWARF CFI-driven stack walking on ARM. 2010-03-16 16:46:22 +00:00
Makefile.in Breakpad: Support DWARF CFI-driven stack walking on ARM. 2010-03-16 16:46:22 +00:00
NEWS Initial import, which includes the Windows client-side dump_syms tool, and 2006-08-25 21:14:45 +00:00
README Rename Airbag to Breakpad. 2007-02-14 19:51:05 +00:00

README 

Breakpad is a set of client and server components which implement a
crash-reporting system.