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
diff --git a/Makefile.in b/Makefile.in
index 0126cdf..048b22c 100644
--- a/Makefile.in
+++ b/Makefile.in
@@ -79,6 +79,7 @@
src/processor/pathname_stripper_unittest$(EXEEXT) \
src/processor/postfix_evaluator_unittest$(EXEEXT) \
src/processor/range_map_unittest$(EXEEXT) \
+ src/processor/stackwalker_arm_unittest$(EXEEXT) \
src/processor/stackwalker_x86_unittest$(EXEEXT) \
src/processor/synth_minidump_unittest$(EXEEXT) \
src/processor/test_assembler_unittest$(EXEEXT) $(am__EXEEXT_1)
@@ -280,6 +281,15 @@
$(am_src_processor_range_map_unittest_OBJECTS)
src_processor_range_map_unittest_DEPENDENCIES = \
src/processor/logging.lo src/processor/pathname_stripper.lo
+am_src_processor_stackwalker_arm_unittest_OBJECTS = src/processor/src_processor_stackwalker_arm_unittest-stackwalker_arm_unittest.$(OBJEXT) \
+ src/processor/src_processor_stackwalker_arm_unittest-test_assembler.$(OBJEXT) \
+ src/testing/gtest/src/src_processor_stackwalker_arm_unittest-gtest-all.$(OBJEXT) \
+ src/testing/gtest/src/src_processor_stackwalker_arm_unittest-gtest_main.$(OBJEXT) \
+ src/testing/src/src_processor_stackwalker_arm_unittest-gmock-all.$(OBJEXT)
+src_processor_stackwalker_arm_unittest_OBJECTS = \
+ $(am_src_processor_stackwalker_arm_unittest_OBJECTS)
+src_processor_stackwalker_arm_unittest_DEPENDENCIES = \
+ src/libbreakpad.la
am_src_processor_stackwalker_selftest_OBJECTS = \
src/processor/stackwalker_selftest.$(OBJEXT)
src_processor_stackwalker_selftest_OBJECTS = \
@@ -359,6 +369,7 @@
$(src_processor_pathname_stripper_unittest_SOURCES) \
$(src_processor_postfix_evaluator_unittest_SOURCES) \
$(src_processor_range_map_unittest_SOURCES) \
+ $(src_processor_stackwalker_arm_unittest_SOURCES) \
$(src_processor_stackwalker_selftest_SOURCES) \
$(src_processor_stackwalker_x86_unittest_SOURCES) \
$(src_processor_synth_minidump_unittest_SOURCES) \
@@ -378,6 +389,7 @@
$(src_processor_pathname_stripper_unittest_SOURCES) \
$(src_processor_postfix_evaluator_unittest_SOURCES) \
$(src_processor_range_map_unittest_SOURCES) \
+ $(src_processor_stackwalker_arm_unittest_SOURCES) \
$(src_processor_stackwalker_selftest_SOURCES) \
$(src_processor_stackwalker_x86_unittest_SOURCES) \
$(src_processor_synth_minidump_unittest_SOURCES) \
@@ -770,6 +782,22 @@
src/processor/stackwalker_sparc.lo \
src/processor/stackwalker_x86.lo
+src_processor_stackwalker_arm_unittest_SOURCES = \
+ src/processor/stackwalker_arm_unittest.cc \
+ src/processor/test_assembler.cc \
+ src/testing/gtest/src/gtest-all.cc \
+ src/testing/gtest/src/gtest_main.cc \
+ src/testing/src/gmock-all.cc
+
+src_processor_stackwalker_arm_unittest_LDADD = \
+ src/libbreakpad.la
+
+src_processor_stackwalker_arm_unittest_CPPFLAGS = \
+ -I$(top_srcdir)/src/testing/include \
+ -I$(top_srcdir)/src/testing/gtest/include \
+ -I$(top_srcdir)/src/testing/gtest \
+ -I$(top_srcdir)/src/testing
+
src_processor_stackwalker_x86_unittest_SOURCES = \
src/processor/stackwalker_x86_unittest.cc \
src/processor/test_assembler.cc \
@@ -1375,6 +1403,24 @@
src/processor/range_map_unittest$(EXEEXT): $(src_processor_range_map_unittest_OBJECTS) $(src_processor_range_map_unittest_DEPENDENCIES) src/processor/$(am__dirstamp)
@rm -f src/processor/range_map_unittest$(EXEEXT)
$(CXXLINK) $(src_processor_range_map_unittest_OBJECTS) $(src_processor_range_map_unittest_LDADD) $(LIBS)
+src/processor/src_processor_stackwalker_arm_unittest-stackwalker_arm_unittest.$(OBJEXT): \
+ src/processor/$(am__dirstamp) \
+ src/processor/$(DEPDIR)/$(am__dirstamp)
+src/processor/src_processor_stackwalker_arm_unittest-test_assembler.$(OBJEXT): \
+ src/processor/$(am__dirstamp) \
+ src/processor/$(DEPDIR)/$(am__dirstamp)
+src/testing/gtest/src/src_processor_stackwalker_arm_unittest-gtest-all.$(OBJEXT): \
+ src/testing/gtest/src/$(am__dirstamp) \
+ src/testing/gtest/src/$(DEPDIR)/$(am__dirstamp)
+src/testing/gtest/src/src_processor_stackwalker_arm_unittest-gtest_main.$(OBJEXT): \
+ src/testing/gtest/src/$(am__dirstamp) \
+ src/testing/gtest/src/$(DEPDIR)/$(am__dirstamp)
+src/testing/src/src_processor_stackwalker_arm_unittest-gmock-all.$(OBJEXT): \
+ src/testing/src/$(am__dirstamp) \
+ src/testing/src/$(DEPDIR)/$(am__dirstamp)
+src/processor/stackwalker_arm_unittest$(EXEEXT): $(src_processor_stackwalker_arm_unittest_OBJECTS) $(src_processor_stackwalker_arm_unittest_DEPENDENCIES) src/processor/$(am__dirstamp)
+ @rm -f src/processor/stackwalker_arm_unittest$(EXEEXT)
+ $(CXXLINK) $(src_processor_stackwalker_arm_unittest_OBJECTS) $(src_processor_stackwalker_arm_unittest_LDADD) $(LIBS)
src/processor/stackwalker_selftest.$(OBJEXT): \
src/processor/$(am__dirstamp) \
src/processor/$(DEPDIR)/$(am__dirstamp)
@@ -1500,6 +1546,8 @@
-rm -f src/processor/src_processor_minidump_unittest-minidump_unittest.$(OBJEXT)
-rm -f src/processor/src_processor_minidump_unittest-synth_minidump.$(OBJEXT)
-rm -f src/processor/src_processor_minidump_unittest-test_assembler.$(OBJEXT)
+ -rm -f src/processor/src_processor_stackwalker_arm_unittest-stackwalker_arm_unittest.$(OBJEXT)
+ -rm -f src/processor/src_processor_stackwalker_arm_unittest-test_assembler.$(OBJEXT)
-rm -f src/processor/src_processor_stackwalker_x86_unittest-stackwalker_x86_unittest.$(OBJEXT)
-rm -f src/processor/src_processor_stackwalker_x86_unittest-test_assembler.$(OBJEXT)
-rm -f src/processor/src_processor_synth_minidump_unittest-synth_minidump.$(OBJEXT)
@@ -1527,6 +1575,8 @@
-rm -f src/testing/gtest/src/src_processor_minidump_processor_unittest-gtest-all.$(OBJEXT)
-rm -f src/testing/gtest/src/src_processor_minidump_unittest-gtest-all.$(OBJEXT)
-rm -f src/testing/gtest/src/src_processor_minidump_unittest-gtest_main.$(OBJEXT)
+ -rm -f src/testing/gtest/src/src_processor_stackwalker_arm_unittest-gtest-all.$(OBJEXT)
+ -rm -f src/testing/gtest/src/src_processor_stackwalker_arm_unittest-gtest_main.$(OBJEXT)
-rm -f src/testing/gtest/src/src_processor_stackwalker_x86_unittest-gtest-all.$(OBJEXT)
-rm -f src/testing/gtest/src/src_processor_stackwalker_x86_unittest-gtest_main.$(OBJEXT)
-rm -f src/testing/gtest/src/src_processor_synth_minidump_unittest-gtest-all.$(OBJEXT)
@@ -1537,6 +1587,7 @@
-rm -f src/testing/src/src_processor_cfi_frame_info_unittest-gmock-all.$(OBJEXT)
-rm -f src/testing/src/src_processor_minidump_processor_unittest-gmock-all.$(OBJEXT)
-rm -f src/testing/src/src_processor_minidump_unittest-gmock-all.$(OBJEXT)
+ -rm -f src/testing/src/src_processor_stackwalker_arm_unittest-gmock-all.$(OBJEXT)
-rm -f src/testing/src/src_processor_stackwalker_x86_unittest-gmock-all.$(OBJEXT)
-rm -f src/testing/src/src_processor_synth_minidump_unittest-gmock-all.$(OBJEXT)
-rm -f src/testing/src/src_processor_test_assembler_unittest-gmock-all.$(OBJEXT)
@@ -1583,6 +1634,8 @@
@AMDEP_TRUE@@am__include@ @am__quote@src/processor/$(DEPDIR)/src_processor_minidump_unittest-minidump_unittest.Po@am__quote@
@AMDEP_TRUE@@am__include@ @am__quote@src/processor/$(DEPDIR)/src_processor_minidump_unittest-synth_minidump.Po@am__quote@
@AMDEP_TRUE@@am__include@ @am__quote@src/processor/$(DEPDIR)/src_processor_minidump_unittest-test_assembler.Po@am__quote@
+@AMDEP_TRUE@@am__include@ @am__quote@src/processor/$(DEPDIR)/src_processor_stackwalker_arm_unittest-stackwalker_arm_unittest.Po@am__quote@
+@AMDEP_TRUE@@am__include@ @am__quote@src/processor/$(DEPDIR)/src_processor_stackwalker_arm_unittest-test_assembler.Po@am__quote@
@AMDEP_TRUE@@am__include@ @am__quote@src/processor/$(DEPDIR)/src_processor_stackwalker_x86_unittest-stackwalker_x86_unittest.Po@am__quote@
@AMDEP_TRUE@@am__include@ @am__quote@src/processor/$(DEPDIR)/src_processor_stackwalker_x86_unittest-test_assembler.Po@am__quote@
@AMDEP_TRUE@@am__include@ @am__quote@src/processor/$(DEPDIR)/src_processor_synth_minidump_unittest-synth_minidump.Po@am__quote@
@@ -1604,6 +1657,8 @@
@AMDEP_TRUE@@am__include@ @am__quote@src/testing/gtest/src/$(DEPDIR)/src_processor_minidump_processor_unittest-gtest-all.Po@am__quote@
@AMDEP_TRUE@@am__include@ @am__quote@src/testing/gtest/src/$(DEPDIR)/src_processor_minidump_unittest-gtest-all.Po@am__quote@
@AMDEP_TRUE@@am__include@ @am__quote@src/testing/gtest/src/$(DEPDIR)/src_processor_minidump_unittest-gtest_main.Po@am__quote@
+@AMDEP_TRUE@@am__include@ @am__quote@src/testing/gtest/src/$(DEPDIR)/src_processor_stackwalker_arm_unittest-gtest-all.Po@am__quote@
+@AMDEP_TRUE@@am__include@ @am__quote@src/testing/gtest/src/$(DEPDIR)/src_processor_stackwalker_arm_unittest-gtest_main.Po@am__quote@
@AMDEP_TRUE@@am__include@ @am__quote@src/testing/gtest/src/$(DEPDIR)/src_processor_stackwalker_x86_unittest-gtest-all.Po@am__quote@
@AMDEP_TRUE@@am__include@ @am__quote@src/testing/gtest/src/$(DEPDIR)/src_processor_stackwalker_x86_unittest-gtest_main.Po@am__quote@
@AMDEP_TRUE@@am__include@ @am__quote@src/testing/gtest/src/$(DEPDIR)/src_processor_synth_minidump_unittest-gtest-all.Po@am__quote@
@@ -1614,6 +1669,7 @@
@AMDEP_TRUE@@am__include@ @am__quote@src/testing/src/$(DEPDIR)/src_processor_cfi_frame_info_unittest-gmock-all.Po@am__quote@
@AMDEP_TRUE@@am__include@ @am__quote@src/testing/src/$(DEPDIR)/src_processor_minidump_processor_unittest-gmock-all.Po@am__quote@
@AMDEP_TRUE@@am__include@ @am__quote@src/testing/src/$(DEPDIR)/src_processor_minidump_unittest-gmock-all.Po@am__quote@
+@AMDEP_TRUE@@am__include@ @am__quote@src/testing/src/$(DEPDIR)/src_processor_stackwalker_arm_unittest-gmock-all.Po@am__quote@
@AMDEP_TRUE@@am__include@ @am__quote@src/testing/src/$(DEPDIR)/src_processor_stackwalker_x86_unittest-gmock-all.Po@am__quote@
@AMDEP_TRUE@@am__include@ @am__quote@src/testing/src/$(DEPDIR)/src_processor_synth_minidump_unittest-gmock-all.Po@am__quote@
@AMDEP_TRUE@@am__include@ @am__quote@src/testing/src/$(DEPDIR)/src_processor_test_assembler_unittest-gmock-all.Po@am__quote@
@@ -1974,6 +2030,76 @@
@AMDEP_TRUE@@am__fastdepCXX_FALSE@ DEPDIR=$(DEPDIR) $(CXXDEPMODE) $(depcomp) @AMDEPBACKSLASH@
@am__fastdepCXX_FALSE@ $(CXX) $(DEFS) $(DEFAULT_INCLUDES) $(INCLUDES) $(src_processor_minidump_unittest_CPPFLAGS) $(CPPFLAGS) $(AM_CXXFLAGS) $(CXXFLAGS) -c -o src/testing/src/src_processor_minidump_unittest-gmock-all.obj `if test -f 'src/testing/src/gmock-all.cc'; then $(CYGPATH_W) 'src/testing/src/gmock-all.cc'; else $(CYGPATH_W) '$(srcdir)/src/testing/src/gmock-all.cc'; fi`
+src/processor/src_processor_stackwalker_arm_unittest-stackwalker_arm_unittest.o: src/processor/stackwalker_arm_unittest.cc
+@am__fastdepCXX_TRUE@ $(CXX) $(DEFS) $(DEFAULT_INCLUDES) $(INCLUDES) $(src_processor_stackwalker_arm_unittest_CPPFLAGS) $(CPPFLAGS) $(AM_CXXFLAGS) $(CXXFLAGS) -MT src/processor/src_processor_stackwalker_arm_unittest-stackwalker_arm_unittest.o -MD -MP -MF src/processor/$(DEPDIR)/src_processor_stackwalker_arm_unittest-stackwalker_arm_unittest.Tpo -c -o src/processor/src_processor_stackwalker_arm_unittest-stackwalker_arm_unittest.o `test -f 'src/processor/stackwalker_arm_unittest.cc' || echo '$(srcdir)/'`src/processor/stackwalker_arm_unittest.cc
+@am__fastdepCXX_TRUE@ $(am__mv) src/processor/$(DEPDIR)/src_processor_stackwalker_arm_unittest-stackwalker_arm_unittest.Tpo src/processor/$(DEPDIR)/src_processor_stackwalker_arm_unittest-stackwalker_arm_unittest.Po
+@AMDEP_TRUE@@am__fastdepCXX_FALSE@ source='src/processor/stackwalker_arm_unittest.cc' object='src/processor/src_processor_stackwalker_arm_unittest-stackwalker_arm_unittest.o' libtool=no @AMDEPBACKSLASH@
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+
+src/processor/src_processor_stackwalker_arm_unittest-stackwalker_arm_unittest.obj: src/processor/stackwalker_arm_unittest.cc
+@am__fastdepCXX_TRUE@ $(CXX) $(DEFS) $(DEFAULT_INCLUDES) $(INCLUDES) $(src_processor_stackwalker_arm_unittest_CPPFLAGS) $(CPPFLAGS) $(AM_CXXFLAGS) $(CXXFLAGS) -MT src/processor/src_processor_stackwalker_arm_unittest-stackwalker_arm_unittest.obj -MD -MP -MF src/processor/$(DEPDIR)/src_processor_stackwalker_arm_unittest-stackwalker_arm_unittest.Tpo -c -o src/processor/src_processor_stackwalker_arm_unittest-stackwalker_arm_unittest.obj `if test -f 'src/processor/stackwalker_arm_unittest.cc'; then $(CYGPATH_W) 'src/processor/stackwalker_arm_unittest.cc'; else $(CYGPATH_W) '$(srcdir)/src/processor/stackwalker_arm_unittest.cc'; fi`
+@am__fastdepCXX_TRUE@ $(am__mv) src/processor/$(DEPDIR)/src_processor_stackwalker_arm_unittest-stackwalker_arm_unittest.Tpo src/processor/$(DEPDIR)/src_processor_stackwalker_arm_unittest-stackwalker_arm_unittest.Po
+@AMDEP_TRUE@@am__fastdepCXX_FALSE@ source='src/processor/stackwalker_arm_unittest.cc' object='src/processor/src_processor_stackwalker_arm_unittest-stackwalker_arm_unittest.obj' libtool=no @AMDEPBACKSLASH@
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+@am__fastdepCXX_FALSE@ $(CXX) $(DEFS) $(DEFAULT_INCLUDES) $(INCLUDES) $(src_processor_stackwalker_arm_unittest_CPPFLAGS) $(CPPFLAGS) $(AM_CXXFLAGS) $(CXXFLAGS) -c -o src/processor/src_processor_stackwalker_arm_unittest-stackwalker_arm_unittest.obj `if test -f 'src/processor/stackwalker_arm_unittest.cc'; then $(CYGPATH_W) 'src/processor/stackwalker_arm_unittest.cc'; else $(CYGPATH_W) '$(srcdir)/src/processor/stackwalker_arm_unittest.cc'; fi`
+
+src/processor/src_processor_stackwalker_arm_unittest-test_assembler.o: src/processor/test_assembler.cc
+@am__fastdepCXX_TRUE@ $(CXX) $(DEFS) $(DEFAULT_INCLUDES) $(INCLUDES) $(src_processor_stackwalker_arm_unittest_CPPFLAGS) $(CPPFLAGS) $(AM_CXXFLAGS) $(CXXFLAGS) -MT src/processor/src_processor_stackwalker_arm_unittest-test_assembler.o -MD -MP -MF src/processor/$(DEPDIR)/src_processor_stackwalker_arm_unittest-test_assembler.Tpo -c -o src/processor/src_processor_stackwalker_arm_unittest-test_assembler.o `test -f 'src/processor/test_assembler.cc' || echo '$(srcdir)/'`src/processor/test_assembler.cc
+@am__fastdepCXX_TRUE@ $(am__mv) src/processor/$(DEPDIR)/src_processor_stackwalker_arm_unittest-test_assembler.Tpo src/processor/$(DEPDIR)/src_processor_stackwalker_arm_unittest-test_assembler.Po
+@AMDEP_TRUE@@am__fastdepCXX_FALSE@ source='src/processor/test_assembler.cc' object='src/processor/src_processor_stackwalker_arm_unittest-test_assembler.o' libtool=no @AMDEPBACKSLASH@
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+
+src/processor/src_processor_stackwalker_arm_unittest-test_assembler.obj: src/processor/test_assembler.cc
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+@am__fastdepCXX_TRUE@ $(CXX) $(DEFS) $(DEFAULT_INCLUDES) $(INCLUDES) $(src_processor_stackwalker_arm_unittest_CPPFLAGS) $(CPPFLAGS) $(AM_CXXFLAGS) $(CXXFLAGS) -MT src/testing/gtest/src/src_processor_stackwalker_arm_unittest-gtest-all.o -MD -MP -MF src/testing/gtest/src/$(DEPDIR)/src_processor_stackwalker_arm_unittest-gtest-all.Tpo -c -o src/testing/gtest/src/src_processor_stackwalker_arm_unittest-gtest-all.o `test -f 'src/testing/gtest/src/gtest-all.cc' || echo '$(srcdir)/'`src/testing/gtest/src/gtest-all.cc
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+
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