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John Stiles 61e5e202a5 Enforce an upper bound on Runtime Effect program size. 
The fuzzer is currently learning to make unboundedly-large programs by
nesting medium-size loops repeatedly. SkVM doesn't have a mechanism to
limit the ensuing explosion of code and ends up making unreasonably deep
stacks and/or unreasonably large programs.

SkSL now enforces an upper bound of approximately 100,000 IR nodes on a
fully-flattened, fully-inlined strict-ES2 program. The limit is picked
out of thin air, but this should be enough to prevent SkVM from going
haywire while still being large enough to handle any reasonable program.
We can definitely tune this value if we find that it is too large
(admitting dangerous code) or too small (rejecting good code).

Change-Id: I11735636175721fbc79460b4e194d8e4b42dc47d
Bug: skia:12396, oss-fuzz:37827, oss-fuzz:37837
Reviewed-on: https://skia-review.googlesource.com/c/skia/+/444358
Auto-Submit: John Stiles <johnstiles@google.com>
Commit-Queue: John Stiles <johnstiles@google.com>
Reviewed-by: Brian Osman <brianosman@google.com>
2021-09-02 14:44:34 +00:00
animations first cut at a checkbox 2009-10-21 19:41:10 +00:00
bazel bazel baby steps 2020-09-14 15:18:32 +00:00
bench Move more Ops to skgpu::v1 namespace 2021-09-02 13:25:29 +00:00
bin Always use python3 to run fetch-sk. 2021-08-31 13:16:22 +00:00
build/fuchsia [fuchsia] Fix fidlc command. 2020-06-10 03:29:24 +00:00
build_overrides fix tint roll - enable tint_build_wgsl_writer 2021-07-01 00:32:40 +00:00
client_utils/android Replace 'typedef xxxxx INHERITED' with 'using INHERITED = xxxx;'. 2020-09-03 03:41:26 +00:00
demos.skia.org Convert internal sample() calls to shade/filter/blend 2021-08-24 21:03:44 +00:00
dm Reland "Fix compilation w/ "skia_enable_svg = false" (take 2)" 2021-09-01 17:54:08 +00:00
docker [infra] Update cmake docker image to be Debian 10 2021-07-23 11:21:31 +00:00
docs/examples Reland "Add sRGB 8888 colortype" 2021-08-24 12:56:32 +00:00
example Remove SDL from DEPS (and SDL example that used it) 2021-05-27 21:37:57 +00:00
experimental Reland "Simplify SkRasterClip now that it's only intersect/diff" 2021-08-31 18:16:31 +00:00
fuzz Reland "Fix compilation w/ "skia_enable_svg = false" (take 2)" 2021-09-01 17:54:08 +00:00
gm Move more Ops to skgpu::v1 namespace 2021-09-02 13:25:29 +00:00
gn Enforce an upper bound on Runtime Effect program size. 2021-09-02 14:44:34 +00:00
include Added line numbers to DSLParser type errors 2021-09-02 13:05:37 +00:00
infra Roll SwiftShader from 9eb5acaba94c to 6aad52e1aef6 (5 revisions) 2021-08-30 17:03:52 +00:00
modules Reland "Fix compilation w/ "skia_enable_svg = false" (take 2)" 2021-09-01 17:54:08 +00:00
platform_tools [JetSki] pass SkPaint into experimental SkText drawText calls 2021-08-26 13:01:51 +00:00
resources Enforce an upper bound on Runtime Effect program size. 2021-09-02 14:44:34 +00:00
samplecode Reland "Fix compilation w/ "skia_enable_svg = false" (take 2)" 2021-09-01 17:54:08 +00:00
site [infra] Add go/skia-break-glass to gardener documentation 2021-09-01 18:58:16 +00:00
specs [infra] Port serve.py from Python2 to 3 2021-08-31 15:28:19 +00:00
src Enforce an upper bound on Runtime Effect program size. 2021-09-02 14:44:34 +00:00
tests Enforce an upper bound on Runtime Effect program size. 2021-09-02 14:44:34 +00:00
third_party Roll skcms from 4f7135f89d98 to c1e907c8f007 (1 revision) 2021-09-01 22:42:05 +00:00
tools Move more Ops to skgpu::v1 namespace (take 2) 2021-09-01 18:57:02 +00:00
.bazelignore bazel baby steps 2020-09-14 15:18:32 +00:00
.clang-format no more bin packing in .clang-format 2021-03-04 17:22:50 +00:00
.clang-tidy Disable ClangTidy namespace comments for short blocks. 2020-08-24 14:01:22 +00:00
.gitignore add mskps/ to .gitignore 2021-07-06 21:04:55 +00:00
.gn Pre-emptive fix for upcoming ANGLE change. 2021-01-08 17:23:52 +00:00
AUTHORS Correct a typo in build_workaround_header.py 2021-07-29 13:06:01 +00:00
BUILD.bazel bazel baby steps 2020-09-14 15:18:32 +00:00
BUILD.gn Remove blend and colorFilter sksl modules 2021-08-31 17:35:19 +00:00
codereview.settings Make uploading to Gerrit the default for Skia 2016-11-09 19:07:56 +00:00
CONTRIBUTING Fix references to https://sites.google.com/site/skiadocs/. 2015-02-03 13:12:54 -02:00
CQ_COMMITTERS Moved committer list to chrome-infra-auth and deleted it from the repo 2015-09-02 13:37:54 -07:00
DEPS Roll SwiftShader from b75ca3758a80 to c82c59307208 (2 revisions) 2021-09-02 05:16:42 +00:00
DIR_METADATA Move metadata in OWNERS files to DIR_METADATA files 2021-02-02 23:41:54 +00:00
go.mod [commandbuffer] Update infra dep to fix CommandBuffer 2021-08-27 16:44:47 +00:00
go.sum [commandbuffer] Update infra dep to fix CommandBuffer 2021-08-27 16:44:47 +00:00
LICENSE LICENSE file: clean up 2019-11-22 21:59:03 +00:00
OWNERS [infra] Add wildcard OWNERS 2021-08-30 19:19:34 +00:00
PRESUBMIT.py [infra] Update PRESUBMIT.py to run under Python3 2021-08-16 20:00:46 +00:00
public.bzl Separate SkUnicode bazel source sets 2021-08-09 18:23:15 +00:00
README Fix references to https://sites.google.com/site/skiadocs/. 2015-02-03 13:12:54 -02:00
README.chromium Update README.chromium. 2015-06-11 13:19:24 -07:00
RELEASE_NOTES.txt SkSL: Use type-specific sampling intrinsics, rather than fn-call syntax 2021-08-24 18:18:46 +00:00
whitespace.txt Test SkCQ 2021-07-24 21:07:28 +00:00
WORKSPACE.bazel bazel baby steps 2020-09-14 15:18:32 +00:00

README 

Skia is a complete 2D graphic library for drawing Text, Geometries, and Images.

See full details, and build instructions, at https://skia.org.