0921e8f28b
This is a reland of 517ab73fd7
Updates since original: now compressed pointers passed to the function
GetObjectProperties are required to be sign-extended. Previously, the
function allowed zero-extended values, but that led to ambiguity on
pointers like 0x88044919: is it compressed or is the heap range actually
centered on 0x100000000?
Original change's description:
> 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}
Bug: v8:9376
Change-Id: I866a1cc9d4c34bfe10c7b98462451fe69763cf3f
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/1717090
Reviewed-by: Michael Achenbach <machenbach@chromium.org>
Reviewed-by: Michael Stanton <mvstanton@chromium.org>
Commit-Queue: Seth Brenith <seth.brenith@microsoft.com>
Cr-Commit-Position: refs/heads/master@{#63008}
68 lines
1.5 KiB
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68 lines
1.5 KiB
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# Copyright 2016 the V8 project authors. All rights reserved.
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# Use of this source code is governed by a BSD-style license that can be
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# found in the LICENSE file.
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import("//build/config/sanitizers/sanitizers.gni")
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import("../gni/v8.gni")
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group("gn_all") {
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testonly = true
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data_deps = [
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":v8_check_static_initializers",
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"debug_helper:v8_debug_helper",
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"gcmole:v8_run_gcmole",
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"jsfunfuzz:v8_jsfunfuzz",
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]
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}
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group("v8_check_static_initializers") {
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data_deps = [
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"..:d8",
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]
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data = [
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"check-static-initializers.sh",
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]
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}
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group("v8_android_test_runner_deps") {
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testonly = true
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if (is_android && !build_with_chromium) {
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data_deps = [
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"//build/android:test_runner_py",
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]
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data = [
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# This is used by android.py, but not included by test_runner_py above.
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"//third_party/catapult/devil/devil/android/perf/",
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]
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}
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}
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group("v8_testrunner") {
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testonly = true
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data_deps = [
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"..:v8_python_base",
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"..:v8_dump_build_config",
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":v8_android_test_runner_deps",
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]
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data = [
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# Also add the num-fuzzer wrapper script in order to be able to run the
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# num-fuzzer on all existing isolated V8 test suites.
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"predictable_wrapper.py",
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"run-num-fuzzer.py",
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"run-tests.py",
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"testrunner/",
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]
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if (v8_code_coverage && sanitizer_coverage_flags == "bb,trace-pc-guard") {
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data += [
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"sanitizers/sancov_merger.py",
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"../third_party/llvm/projects/compiler-rt/lib/sanitizer_common/scripts/sancov.py",
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]
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}
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}
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