3e1db847b3
This is the beginning of a new fuzzer that generates
correct-by-construction Wasm modules. This should allow us to better
exercise the compiler and correctness aspects of fuzzing. It is based off
of ahaas' original Wasm fuzzer.
At the moment, it can generate expressions made up of most binops, and
also nested blocks with unconditional breaks. Future CLs will add
additional constructs, such as br_if, loops, memory access, etc.
The way the fuzzer works is that it starts with an array of arbitrary
data provided by libfuzzer. It uses the data to generate an expression.
Care is taken to make use of the entire string. Basically, the
generator has a bunch of grammar-like rules for how to construct an
expression of a given type. For example, an i32 can be made by adding
two other i32s, or by wrapping an i64. The process then continues
recursively until all the data is consumed.
We generate an expression from a slice of data as follows:
* If the slice is less than or equal to the size of the type (e.g. 4
bytes for i32), then it will emit the entire slice as a constant.
* Otherwise, it will consume the first 4 bytes of the slice and use
this to select which rule to apply. Each rule then consumes the
remainder of the slice in an appropriate way. For example:
* Unary ops use the remainder of the slice to generate the argument.
* Binary ops consume another four bytes and mod this with the length
of the remaining slice to split the slice into two parts. Each of
these subslices are then used to generate one of the arguments to
the binop.
* Blocks are basically like a unary op, but a stack of block types is
maintained to facilitate branches. For blocks that end in a break,
the first four bytes of a slice are used to select the break depth
and the stack determines what type of expression to generate.
The goal is that once this generator is complete, it will provide a one
to one mapping between binary strings and valid Wasm modules.
Review-Url: https://codereview.chromium.org/2658723006
Cr-Commit-Position: refs/heads/master@{#43289}
491 lines
11 KiB
Python
491 lines
11 KiB
Python
# 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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{
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'variables': {
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'v8_code': 1,
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},
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'includes': ['../../gypfiles/toolchain.gypi', '../../gypfiles/features.gypi'],
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'targets': [
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{
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'target_name': 'v8_simple_json_fuzzer',
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'type': 'executable',
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'dependencies': [
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'json_fuzzer_lib',
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],
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'include_dirs': [
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'../..',
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],
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'sources': [
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'fuzzer.cc',
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],
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},
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{
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'target_name': 'json_fuzzer_lib',
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'type': 'static_library',
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'dependencies': [
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'fuzzer_support',
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],
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'include_dirs': [
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'../..',
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],
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'sources': [ ### gcmole(all) ###
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'json.cc',
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],
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},
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{
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'target_name': 'v8_simple_parser_fuzzer',
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'type': 'executable',
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'dependencies': [
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'parser_fuzzer_lib',
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],
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'include_dirs': [
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'../..',
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],
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'sources': [
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'fuzzer.cc',
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],
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},
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{
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'target_name': 'parser_fuzzer_lib',
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'type': 'static_library',
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'dependencies': [
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'fuzzer_support',
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],
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'include_dirs': [
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'../..',
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],
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'sources': [ ### gcmole(all) ###
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'parser.cc',
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],
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},
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{
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'target_name': 'v8_simple_regexp_fuzzer',
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'type': 'executable',
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'dependencies': [
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'regexp_fuzzer_lib',
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],
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'include_dirs': [
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'../..',
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],
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'sources': [
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'fuzzer.cc',
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],
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},
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{
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'target_name': 'regexp_fuzzer_lib',
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'type': 'static_library',
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'dependencies': [
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'fuzzer_support',
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],
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'include_dirs': [
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'../..',
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],
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'sources': [ ### gcmole(all) ###
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'regexp.cc',
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],
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},
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{
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'target_name': 'v8_simple_wasm_fuzzer',
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'type': 'executable',
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'dependencies': [
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'wasm_fuzzer_lib',
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],
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'include_dirs': [
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'../..',
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],
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'sources': [
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'fuzzer.cc',
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],
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},
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{
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'target_name': 'wasm_fuzzer_lib',
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'type': 'static_library',
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'dependencies': [
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'fuzzer_support',
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],
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'include_dirs': [
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'../..',
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],
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'sources': [ ### gcmole(all) ###
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'wasm.cc',
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'../common/wasm/wasm-module-runner.cc',
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'../common/wasm/wasm-module-runner.h',
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],
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},
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{
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'target_name': 'v8_simple_wasm_asmjs_fuzzer',
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'type': 'executable',
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'dependencies': [
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'wasm_asmjs_fuzzer_lib',
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],
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'include_dirs': [
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'../..',
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],
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'sources': [
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'fuzzer.cc',
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],
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},
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{
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'target_name': 'wasm_asmjs_fuzzer_lib',
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'type': 'static_library',
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'dependencies': [
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'fuzzer_support',
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],
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'include_dirs': [
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'../..',
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],
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'sources': [ ### gcmole(all) ###
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'wasm-asmjs.cc',
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'../common/wasm/wasm-module-runner.cc',
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'../common/wasm/wasm-module-runner.h',
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],
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},
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{
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'target_name': 'v8_simple_wasm_call_fuzzer',
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'type': 'executable',
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'dependencies': [
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'wasm_call_fuzzer_lib',
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],
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'include_dirs': [
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'../..',
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],
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'sources': [
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'fuzzer.cc',
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],
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},
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{
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'target_name': 'wasm_call_fuzzer_lib',
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'type': 'static_library',
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'dependencies': [
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'fuzzer_support',
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],
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'include_dirs': [
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'../..',
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],
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'sources': [ ### gcmole(all) ###
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'wasm-call.cc',
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'../common/wasm/test-signatures.h',
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'../common/wasm/wasm-module-runner.cc',
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'../common/wasm/wasm-module-runner.h',
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],
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},
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{
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'target_name': 'v8_simple_wasm_code_fuzzer',
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'type': 'executable',
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'dependencies': [
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'wasm_code_fuzzer_lib',
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],
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'include_dirs': [
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'../..',
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],
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'sources': [
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'fuzzer.cc',
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],
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},
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{
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'target_name': 'wasm_code_fuzzer_lib',
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'type': 'static_library',
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'dependencies': [
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'fuzzer_support',
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],
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'include_dirs': [
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'../..',
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],
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'sources': [ ### gcmole(all) ###
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'wasm-code.cc',
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'../common/wasm/test-signatures.h',
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'../common/wasm/wasm-module-runner.cc',
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'../common/wasm/wasm-module-runner.h',
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],
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},
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{
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'target_name': 'v8_simple_wasm_compile_fuzzer',
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'type': 'executable',
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'dependencies': [
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'wasm_compile_fuzzer_lib',
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],
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'include_dirs': [
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'../..',
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],
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'sources': [
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'fuzzer.cc',
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],
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},
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{
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'target_name': 'wasm_compile_fuzzer_lib',
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'type': 'static_library',
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'dependencies': [
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'fuzzer_support',
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],
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'include_dirs': [
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'../..',
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],
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'sources': [ ### gcmole(all) ###
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'wasm-compile.cc',
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'../common/wasm/test-signatures.h',
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'../common/wasm/wasm-module-runner.cc',
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'../common/wasm/wasm-module-runner.h',
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],
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},
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{
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'target_name': 'v8_simple_wasm_data_section_fuzzer',
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'type': 'executable',
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'dependencies': [
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'wasm_data_section_fuzzer_lib',
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],
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'include_dirs': [
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'../..',
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],
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'sources': [
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'fuzzer.cc',
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],
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},
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{
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'target_name': 'wasm_data_section_fuzzer_lib',
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'type': 'static_library',
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'dependencies': [
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'fuzzer_support',
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],
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'include_dirs': [
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'../..',
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],
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'sources': [ ### gcmole(all) ###
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'wasm-data-section.cc',
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'../common/wasm/wasm-module-runner.cc',
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'../common/wasm/wasm-module-runner.h',
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'wasm-section-fuzzers.cc',
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'wasm-section-fuzzers.h',
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],
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},
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{
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'target_name': 'v8_simple_wasm_function_sigs_section_fuzzer',
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'type': 'executable',
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'dependencies': [
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'wasm_function_sigs_section_fuzzer_lib',
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],
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'include_dirs': [
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'../..',
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],
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'sources': [
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'fuzzer.cc',
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],
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},
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{
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'target_name': 'wasm_function_sigs_section_fuzzer_lib',
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'type': 'static_library',
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'dependencies': [
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'fuzzer_support',
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],
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'include_dirs': [
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'../..',
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],
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'sources': [ ### gcmole(all) ###
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'wasm-function-sigs-section.cc',
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'../common/wasm/wasm-module-runner.cc',
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'../common/wasm/wasm-module-runner.h',
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'wasm-section-fuzzers.cc',
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'wasm-section-fuzzers.h',
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],
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},
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{
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'target_name': 'v8_simple_wasm_globals_section_fuzzer',
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'type': 'executable',
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'dependencies': [
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'wasm_globals_section_fuzzer_lib',
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],
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'include_dirs': [
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'../..',
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],
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'sources': [
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'fuzzer.cc',
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],
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},
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{
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'target_name': 'wasm_globals_section_fuzzer_lib',
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'type': 'static_library',
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'dependencies': [
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'fuzzer_support',
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],
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'include_dirs': [
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'../..',
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],
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'sources': [ ### gcmole(all) ###
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'wasm-globals-section.cc',
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'../common/wasm/wasm-module-runner.cc',
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'../common/wasm/wasm-module-runner.h',
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'wasm-section-fuzzers.cc',
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'wasm-section-fuzzers.h',
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],
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},
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{
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'target_name': 'v8_simple_wasm_imports_section_fuzzer',
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'type': 'executable',
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'dependencies': [
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'wasm_imports_section_fuzzer_lib',
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],
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'include_dirs': [
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'../..',
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],
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'sources': [
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'fuzzer.cc',
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],
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},
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{
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'target_name': 'wasm_imports_section_fuzzer_lib',
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'type': 'static_library',
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'dependencies': [
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'fuzzer_support',
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],
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'include_dirs': [
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'../..',
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],
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'sources': [ ### gcmole(all) ###
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'wasm-imports-section.cc',
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'../common/wasm/wasm-module-runner.cc',
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'../common/wasm/wasm-module-runner.h',
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'wasm-section-fuzzers.cc',
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'wasm-section-fuzzers.h',
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],
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},
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{
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'target_name': 'v8_simple_wasm_memory_section_fuzzer',
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'type': 'executable',
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'dependencies': [
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'wasm_memory_section_fuzzer_lib',
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],
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'include_dirs': [
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'../..',
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],
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'sources': [
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'fuzzer.cc',
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],
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},
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{
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'target_name': 'wasm_memory_section_fuzzer_lib',
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'type': 'static_library',
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'dependencies': [
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'fuzzer_support',
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],
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'include_dirs': [
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'../..',
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],
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'sources': [ ### gcmole(all) ###
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'wasm-memory-section.cc',
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'../common/wasm/wasm-module-runner.cc',
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'../common/wasm/wasm-module-runner.h',
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'wasm-section-fuzzers.cc',
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'wasm-section-fuzzers.h',
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],
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},
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{
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'target_name': 'v8_simple_wasm_names_section_fuzzer',
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'type': 'executable',
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'dependencies': [
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'wasm_names_section_fuzzer_lib',
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],
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'include_dirs': [
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'../..',
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],
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'sources': [
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'fuzzer.cc',
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],
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},
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{
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'target_name': 'wasm_names_section_fuzzer_lib',
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'type': 'static_library',
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'dependencies': [
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'fuzzer_support',
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],
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'include_dirs': [
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'../..',
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],
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'sources': [ ### gcmole(all) ###
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'wasm-names-section.cc',
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'../common/wasm/wasm-module-runner.cc',
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'../common/wasm/wasm-module-runner.h',
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'wasm-section-fuzzers.cc',
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'wasm-section-fuzzers.h',
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],
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},
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{
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'target_name': 'v8_simple_wasm_types_section_fuzzer',
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'type': 'executable',
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'dependencies': [
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'wasm_types_section_fuzzer_lib',
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],
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'include_dirs': [
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'../..',
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],
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'sources': [
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'fuzzer.cc',
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],
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},
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{
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'target_name': 'wasm_types_section_fuzzer_lib',
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'type': 'static_library',
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'dependencies': [
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'fuzzer_support',
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],
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'include_dirs': [
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'../..',
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],
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'sources': [ ### gcmole(all) ###
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'wasm-types-section.cc',
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'../common/wasm/wasm-module-runner.cc',
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'../common/wasm/wasm-module-runner.h',
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'wasm-section-fuzzers.cc',
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'wasm-section-fuzzers.h',
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],
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},
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{
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'target_name': 'fuzzer_support',
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'type': 'static_library',
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'dependencies': [
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'../../src/v8.gyp:v8',
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'../../src/v8.gyp:v8_libbase',
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'../../src/v8.gyp:v8_libplatform',
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],
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'include_dirs': [
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'../..',
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],
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'sources': [ ### gcmole(all) ###
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'fuzzer-support.cc',
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'fuzzer-support.h',
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],
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'conditions': [
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['v8_enable_i18n_support==1', {
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'dependencies': [
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'<(icu_gyp_path):icui18n',
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'<(icu_gyp_path):icuuc',
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],
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}],
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],
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},
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],
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'conditions': [
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['test_isolation_mode != "noop"', {
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'targets': [
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{
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'target_name': 'fuzzer_run',
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'type': 'none',
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'dependencies': [
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'v8_simple_json_fuzzer',
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'v8_simple_parser_fuzzer',
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'v8_simple_regexp_fuzzer',
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'v8_simple_wasm_fuzzer',
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'v8_simple_wasm_asmjs_fuzzer',
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],
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'includes': [
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'../../gypfiles/isolate.gypi',
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],
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'sources': [
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'fuzzer.isolate',
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],
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},
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],
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}],
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],
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}
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