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Seth Brenith 517ab73fd7 Add postmortem debugging helper library 
This change begins to implement the functionality described in
https://docs.google.com/document/d/1evHnb1uLlSbvHAAsmOXyc25x3uh1DjgNa8u1RHvwVhk/edit#
for investigating V8 state in crash dumps.

This change adds a new library, v8_debug_helper, for providing platform-
agnostic assistance with postmortem debugging. This library can be used
by extensions built for debuggers such as WinDbg or lldb. Its public API
is described by debug-helper.h; currently the only method it exposes is
GetObjectProperties, but we'd like to add more functionality over time.
The API surface is restricted to plain C-style structs and pointers, so
that it's easy to link from a debugger extension built with a different
toolchain.

This change also adds a new cctest file to exercise some basic
interaction with the new library.

The API function GetObjectProperties takes an object pointer (which
could be compressed, or weak, or a SMI), and returns a string
description of the object and a list of properties the object contains.
For now, the list of properties is entirely based on Torque object
definitions, but we expect to add custom properties in future updates so
that it can be easier to make sense of complex data structures such as
dictionaries.

GetObjectProperties does several things that are intended to generate
somewhat useful results even in cases where memory may be corrupt or
unavailable:
- The caller may optionally provide a type string which will be used if
  the memory for the object's Map is inaccessible.
- All object pointers are compared against the list of known objects
  generated by mkgrokdump. The caller may optionally provide the
  pointers for the first pages of various heap spaces, to avoid spurious
  matches. If those pointers are not provided, then any matches are
  prefixed with "maybe" in the resulting description string, such as
  "maybe UndefinedValue (0x4288000341 <Oddball>)".

Bug: v8:9376

Change-Id: Iebf3cc2dea3133c7811bcefcdf38d9458b02fded
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/1628012
Commit-Queue: Seth Brenith <seth.brenith@microsoft.com>
Reviewed-by: Yang Guo <yangguo@chromium.org>
Reviewed-by: Michael Stanton <mvstanton@chromium.org>
Cr-Commit-Position: refs/heads/master@{#62882}
2019-07-23 20:02:16 +00:00
..
blink_tests [test] Remove obsolete blink test skips 2019-01-18 12:30:23 +00:00
cfi Reland "Move API-related files" 2019-05-17 12:52:27 +00:00
clusterfuzz [asm.js] Propagate language mode to exported functions. 2019-07-19 11:47:48 +00:00
debug_helper Add postmortem debugging helper library 2019-07-23 20:02:16 +00:00
dev [wasm-c-api] Add tests and fixes 2019-05-28 09:57:04 +00:00
gcmole Add postmortem debugging helper library 2019-07-23 20:02:16 +00:00
generate_shim_headers Add dependency to ICU 4.6 2013-07-01 08:32:41 +00:00
heap-stats [objects] Rename JSValue to JSPrimitiveWrapper 2019-06-24 13:54:38 +00:00
ignition Preparing v8 to use with python3 /tools 2019-02-19 09:12:07 +00:00
jsfunfuzz [test] update the jsfunfuzz archive in Google Storage 2018-12-18 15:00:35 +00:00
link_clicker.extension [tools] Add link_click chrome extension 2017-05-09 15:25:21 +00:00
mb Add json output arg to mg gen and analyze. 2019-07-22 19:33:20 +00:00
memory [build] Fix win-asan compilation 2017-10-16 08:37:15 +00:00
msan [gn] Add missing dep and blacklist for msan 2016-07-29 09:01:24 +00:00
ninja [ycm] The YouCompleteMe configuration is not VIM specific. 2015-02-12 07:21:13 +00:00
node Remove android_tools deps for v8 repo 2019-07-03 17:59:11 +00:00
perf [tools] Refactor patch/no-patch terminology in run_perf.py 2017-11-22 07:19:50 +00:00
profview [profview] Use requestAnimationFrame to schedule a render 2019-01-15 13:08:46 +00:00
profviz [Tools] Add support to tickprocessor to symbolize libraries embedded in APKs 2019-05-28 16:18:47 +00:00
release [tools] Remove cctest from non-ref official archives 2019-04-12 09:17:52 +00:00
sanitizers Preparing v8 to use with python3 /tools 2019-02-19 09:12:07 +00:00
snapshot [Builtins] Infrastructure for source positions in stubs/builtins 2019-01-22 19:09:36 +00:00
sodium Add tool to visualize machine code/lithium. 2013-10-21 13:35:48 +00:00
testrunner [test] Add --assert-types flag to linux x64 release builders 2019-07-12 14:30:49 +00:00
toolchain [build] Add support for the other MIPS architectures 2018-03-19 10:43:07 +00:00
torque Don't write formatted tq files if nothing changed 2019-06-25 12:16:21 +00:00
tracing/proto-converter [tracing] Add the proto to json converter for trace events 2019-03-25 08:56:18 +00:00
turbolizer [turbolizer] Fix keyboard shortcuts in info tab to reveal input/output nodes. 2019-07-09 14:15:52 +00:00
ubsan [test] Remove obsolete ubsan suppression 2019-02-20 09:16:57 +00:00
unittests Check that function was prepared before optimizing using manually 2019-07-11 14:57:49 +00:00
v8.xcodeproj Add support for building Xcode project files from GYP files 2011-06-09 09:07:17 +00:00
valgrind/asan [build] Add testrunner data deps 2018-03-26 12:17:08 +00:00
vim [vim] Update CrBuild to use autoninja. 2019-05-27 06:27:29 +00:00
visual_studio Remove the Visual Studio project files 2011-05-02 13:43:13 +00:00
wasm [wasm][tests] Add proposal tests to the wasm spec tests 2019-07-17 15:31:31 +00:00
wasm-compilation-hints [wasm-hints] Add tool to inject compilation hints into Wasm modules 2019-05-23 15:16:46 +00:00
__init__.py [test] make python recognize tools and tools/unittests as packages 2018-12-17 12:12:43 +00:00
adb-d8.py Migrate android SDK path to third_party/android_sdk/public for v8 repo 2019-03-21 12:43:39 +00:00
android-build.sh Rewrite Makefile rules for Android to allow parallel execution 2012-07-27 11:14:44 +00:00
android-ll-prof.sh Change default ARCH version in android low-level profiler script to 4.6 2012-10-08 11:11:30 +00:00
android-run.py Preparing v8 to use with python3 /tools 2019-02-19 09:12:07 +00:00
android-sync.sh [tools] Move common arguments processing into separate file 2017-10-24 00:25:04 +00:00
arguments.js [tools] Move common arguments processing into separate file 2017-10-24 00:25:04 +00:00
avg.py Preparing v8 to use with python3 /tools 2019-02-19 09:12:07 +00:00
bash-completion.sh Move remaining files in src/ 2019-05-24 18:24:36 +00:00
bigint-tester.py Preparing v8 to use with python3 /tools 2019-02-19 09:12:07 +00:00
BUILD.gn Add postmortem debugging helper library 2019-07-23 20:02:16 +00:00
callstats.html [tools] Clean up HTML for tools 2019-01-06 14:20:33 +00:00
callstats.py [browser-stories] refactor reading logs 2019-07-17 13:42:32 +00:00
callstats.py.vpython [tools] Fix platform specification for scipi 2018-08-17 18:49:49 +00:00
check-inline-includes.sh [iwyu] Extend inline include checking to tests. 2017-09-08 09:31:32 +00:00
check-static-initializers.sh [logging] Systematically emit CodeCreateEvents for builtins 2019-05-23 11:55:36 +00:00
check-unused-bailouts.sh [tools] Speed-up check-unused-bailouts.sh 2017-08-02 11:11:19 +00:00
check-unused-symbols.sh [cleanup] Remove unused heap-symbols and add tool. 2018-11-08 17:57:05 +00:00
codemap.js Revert "[prof] Attribute ticks in embedded builtins correctly" 2019-05-27 10:11:14 +00:00
collect_deprecation_stats.sh [objects] Deprecate GetIsolate/Heap behind a flag 2018-06-01 15:19:21 +00:00
compare-table-gen.js Add more exhaustive tests for Math.min and Math.max. 2015-04-10 12:35:16 +00:00
concatenate-files.py Preparing v8 to use with python3 /tools 2019-02-19 09:12:07 +00:00
consarray.js Make sure files end with exactly one new line and police this in presubmit. 2013-11-22 13:50:39 +00:00
cpu.sh [tools] Allow specifying cores for cpu.sh script. 2015-11-18 10:53:30 +00:00
cross_build_gcc.sh Fix tools/cross_build_gcc.sh. 2014-02-20 16:37:40 +00:00
csvparser.js Escape backslashes when logging. 2018-08-10 09:09:19 +00:00
deprecation_stats.py Preparing v8 to use with python3 /tools 2019-02-19 09:12:07 +00:00
DEPS Add DEPS files and run checkdeps in presubmit check 2014-06-03 13:39:42 +00:00
detect-builtins.js [tools] Fix detect-builtins.js 2016-06-09 10:17:32 +00:00
disasm.py [grokdump] Include -z flag to make objdump disassemble all-zero sections 2017-04-21 13:35:37 +00:00
draw_instruction_graph.sh Rename A64 port to ARM64 port 2014-03-21 09:28:26 +00:00
dump-cpp.py Preparing v8 to use with python3 /tools 2019-02-19 09:12:07 +00:00
dumpcpp-driver.js [Tools] Add support to tickprocessor to symbolize libraries embedded in APKs 2019-05-28 16:18:47 +00:00
dumpcpp.js [log] Improve log parsing 2018-06-20 13:40:22 +00:00
eval_gc_nvp.py Preparing v8 to use with python3 /tools 2019-02-19 09:12:07 +00:00
eval_gc_time.sh [in-place weak refs] Remove WeakCell 2018-08-14 08:05:05 +00:00
find_depot_tools.py Preparing v8 to use with python3 /tools 2019-02-19 09:12:07 +00:00
find-commit-for-patch.py Preparing v8 to use with python3 /tools 2019-02-19 09:12:07 +00:00
freebsd-tick-processor * Fix build errors on FreeBSD 8.2 2011-03-16 11:15:43 +00:00
fuzz-harness.sh [compiler] Make --debug-code the default in debug builds. 2016-12-02 11:36:55 +00:00
gc_nvp_common.py Clean up mark-compact phases and GC counter names. 2015-12-11 11:26:21 +00:00
gc-nvp-to-csv.py Preparing v8 to use with python3 /tools 2019-02-19 09:12:07 +00:00
gc-nvp-trace-processor.py Preparing v8 to use with python3 /tools 2019-02-19 09:12:07 +00:00
gdb-v8-support.py Preparing v8 to use with python3 /tools 2019-02-19 09:12:07 +00:00
gdbinit [gdb] Add gdb macro 'pn' that prints TurboFan nodes 2019-06-27 13:29:08 +00:00
gen-inlining-tests.py Preparing v8 to use with python3 /tools 2019-02-19 09:12:07 +00:00
gen-keywords-gen-h.py [parser] Remove #line directives from keywords-gen.h 2018-11-28 15:22:05 +00:00
gen-postmortem-metadata.py [torque] Use @generateCppClass in some simple cases 2019-07-15 15:29:08 +00:00
generate-builtins-tests.py Preparing v8 to use with python3 /tools 2019-02-19 09:12:07 +00:00
generate-header-include-checks.py Move remaining files in src/ 2019-05-24 18:24:36 +00:00
generate-ten-powers.scm Fast double-to-ascii conversion. 2010-03-11 14:49:35 +00:00
get_landmines.py [landmines] Force clean build to fix Misc V8 Linux gcc 2019-06-06 21:52:11 +00:00
grokdump.py [grokdump] Fix outdated arm64 identifier value 2019-06-07 08:30:56 +00:00
ic-explorer.html [tools] Clean up HTML for tools 2019-01-06 14:20:33 +00:00
ic-processor [tools] Move common arguments processing into separate file 2017-10-24 00:25:04 +00:00
ic-processor-driver.js [tools] Fix IC-Explorer drilldown and format file 2017-10-30 11:17:43 +00:00
ic-processor.js [tools] Make ic-processor print global loads/stores. 2019-01-18 12:35:43 +00:00
js2c.py Move remaining files in src/ 2019-05-24 18:24:36 +00:00
linux-tick-processor [tools] Make tick processor report error to stderr. 2018-11-06 14:25:55 +00:00
ll_prof.py Preparing v8 to use with python3 /tools 2019-02-19 09:12:07 +00:00
lldb_commands.py Preparing v8 to use with python3 /tools 2019-02-19 09:12:07 +00:00
locs.py [tools] Use ThreadPoolExecutor with reasonable job count default 2019-04-08 10:41:46 +00:00
logreader.js [log] Improve log parsing 2018-06-20 13:40:22 +00:00
mac-nm [profiler] Graphical front-end for tick processor. 2017-03-04 13:04:58 +00:00
mac-tick-processor Implement shared libraries logging on Mac OS X, added required support in Tick Processor. 2009-07-14 05:01:06 +00:00
Makefile.tags [Makefile] Move tags generation to standalone Makefile 2018-01-26 12:03:32 +00:00
map-processor tick processor: fix arguments and comments 2018-10-29 09:48:23 +00:00
map-processor-driver.js [tools] All new shiny maptracer.html 2017-12-18 12:48:00 +00:00
map-processor.html [tools] Clean up HTML for tools 2019-01-06 14:20:33 +00:00
map-processor.js [tools] Add file positions to map-explorer 2018-11-29 11:42:25 +00:00
mips_toolchain.tar.gz.sha1 [build] Enable downloading mips toolchain via runhooks 2018-01-31 14:38:43 +00:00
objdump-v8 [disasm] Make jump target printing perf friendly 2017-03-20 14:47:04 +00:00
OWNERS Use COMMON_OWNERS for tools/ 2019-07-02 07:25:11 +00:00
parse-processor tick processor: fix arguments and comments 2018-10-29 09:48:23 +00:00
parse-processor-driver.js [tools] New parse processor tool 2017-12-20 13:07:17 +00:00
parse-processor.html [tools] Clean up HTML for tools 2019-01-06 14:20:33 +00:00
parse-processor.js [tools] Improve function event logging and parse processor 2018-07-16 14:05:14 +00:00
perf-compare.py Preparing v8 to use with python3 /tools 2019-02-19 09:12:07 +00:00
plot-timer-events tick processor: fix arguments and comments 2018-10-29 09:48:23 +00:00
predictable_wrapper.py Preparing v8 to use with python3 /tools 2019-02-19 09:12:07 +00:00
PRESUBMIT.py [tools] Clean up presubmit and run all unittests 2019-02-01 10:27:29 +00:00
profile_view.js Tick processor: improved [Summary] section 2014-08-04 08:31:49 +00:00
profile.js [profview] Avoid treating embedded builtins as CPP code. 2018-09-27 12:14:15 +00:00
run_perf.py [perf] mask timeout failures if they succeed after retries 2019-07-16 09:38:40 +00:00
run-clang-tidy.py Preparing v8 to use with python3 /tools 2019-02-19 09:12:07 +00:00
run-llprof.sh Fix tools/run-llprof.sh to work with newer perf. 2014-10-09 06:01:41 +00:00
run-num-fuzzer.py [test] Implement gc fuzzer with test processors 2018-01-19 16:58:49 +00:00
run-perf.sh [cleanup] Replace underscore by minus in d8 flags 2019-04-03 12:32:08 +00:00
run-tests.py TestRunner initial refactor 2017-10-13 08:52:28 +00:00
run-wasm-api-tests.py [wasm-c-api] Introducing WasmCapiFunction 2019-05-08 14:28:06 +00:00
run.py First cut at run_mksnapshot action for gn 2014-06-03 06:50:46 +00:00
shell-utils.h Move remaining files in src/ 2019-05-24 18:24:36 +00:00
SourceMap.js Add source map support to tick processor. 2013-08-23 17:20:54 +00:00
splaytree.js Remove support for logging into a memory buffer. 2011-07-13 11:31:22 +00:00
stats-viewer.py Preparing v8 to use with python3 /tools 2019-02-19 09:12:07 +00:00
test262-results-parser.js test262 roll 2018-08-28 21:18:23 +00:00
tick-processor.html [Tools] Add support to tickprocessor to symbolize libraries embedded in APKs 2019-05-28 16:18:47 +00:00
tickprocessor-driver.js [Tools] Add support to tickprocessor to symbolize libraries embedded in APKs 2019-05-28 16:18:47 +00:00
tickprocessor.js [tools] Strip path from library when applying targetRootFS in tickprocessor 2019-06-28 15:07:24 +00:00
trace-maps-processor.py Preparing v8 to use with python3 /tools 2019-02-19 09:12:07 +00:00
try_perf.py [tools] Add support for --confidence-level flag to tools/try_perf.py 2019-06-14 12:33:49 +00:00
turbolizer-perf.py Preparing v8 to use with python3 /tools 2019-02-19 09:12:07 +00:00
update-object-macros-undef.py Preparing v8 to use with python3 /tools 2019-02-19 09:12:07 +00:00
v8_presubmit.py Enable cpplint 'runtime/references' warning 2019-07-08 09:59:36 +00:00
v8heapconst.py Revert "Use list of invalidated objects for old-to-new refs" 2019-07-16 15:55:37 +00:00
whitespace.txt Whitespace CL to trigger build. 2019-06-30 07:39:08 +00:00
windbg.js Added !mem and !where extensions to windbg.js 2019-06-21 16:03:38 +00:00
windows-tick-processor.bat [tools] Move common arguments processing into separate file 2017-10-24 00:25:04 +00:00