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llvm-project/llvm/test/Instrumentation/SanitizerCoverage/coff-pc-table-inline-8bit-c...

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[libFuzzer] Port to Windows Summary: Port libFuzzer to windows-msvc. This patch allows libFuzzer targets to be built and run on Windows, using -fsanitize=fuzzer and/or fsanitize=fuzzer-no-link. It allows these forms of coverage instrumentation to work on Windows as well. It does not fix all issues, such as those with -fsanitize-coverage=stack-depth, which is not usable on Windows as of this patch. It also does not fix any libFuzzer integration tests. Nearly all of them fail to compile, fixing them will come in a later patch, so libFuzzer tests are disabled on Windows until them. Patch By: metzman Reviewers: morehouse, rnk Reviewed By: morehouse, rnk Subscribers: #sanitizers, delcypher, morehouse, kcc, eraman Differential Revision: https://reviews.llvm.org/D51022 llvm-svn: 341082
2018-08-30 23:54:44 +08:00
; Checks that the PC and 8-bit Counter Arrays are placed in their own sections in COFF binaries.
[NewPM][Sancov] Make Sancov a Module Pass instead of 2 Passes This patch merges the sancov module and funciton passes into one module pass. The reason for this is because we ran into an out of memory error when attempting to run asan fuzzer on some protobufs (pc.cc files). I traced the OOM error to the destructor of SanitizerCoverage where we only call appendTo[Compiler]Used which calls appendToUsedList. I'm not sure where precisely in appendToUsedList causes the OOM, but I am able to confirm that it's calling this function *repeatedly* that causes the OOM. (I hacked sancov a bit such that I can still create and destroy a new sancov on every function run, but only call appendToUsedList after all functions in the module have finished. This passes, but when I make it such that appendToUsedList is called on every sancov destruction, we hit OOM.) I don't think the OOM is from just adding to the SmallSet and SmallVector inside appendToUsedList since in either case for a given module, they'll have the same max size. I suspect that when the existing llvm.compiler.used global is erased, the memory behind it isn't freed. I could be wrong on this though. This patch works around the OOM issue by just calling appendToUsedList at the end of every module run instead of function run. The same amount of constants still get added to llvm.compiler.used, abd we make the pass usage and logic simpler by not having any inter-pass dependencies. Differential Revision: https://reviews.llvm.org/D66988 llvm-svn: 370971
2019-09-05 04:30:29 +08:00
; RUN: opt < %s -passes='module(sancov-module)' -sanitizer-coverage-level=1 -sanitizer-coverage-inline-8bit-counters=1 -sanitizer-coverage-pc-table=1 -S | FileCheck %s
[libFuzzer] Port to Windows Summary: Port libFuzzer to windows-msvc. This patch allows libFuzzer targets to be built and run on Windows, using -fsanitize=fuzzer and/or fsanitize=fuzzer-no-link. It allows these forms of coverage instrumentation to work on Windows as well. It does not fix all issues, such as those with -fsanitize-coverage=stack-depth, which is not usable on Windows as of this patch. It also does not fix any libFuzzer integration tests. Nearly all of them fail to compile, fixing them will come in a later patch, so libFuzzer tests are disabled on Windows until them. Patch By: metzman Reviewers: morehouse, rnk Reviewed By: morehouse, rnk Subscribers: #sanitizers, delcypher, morehouse, kcc, eraman Differential Revision: https://reviews.llvm.org/D51022 llvm-svn: 341082
2018-08-30 23:54:44 +08:00
target datalayout = "e-m:w-i64:64-f80:128-n8:16:32:64-S128"
target triple = "x86_64-pc-windows-msvc19.14.26433"
define void @foo() {
entry:
ret void
}
; CHECK-DAG: section ".SCOV{{\$}}CM",
; CHECK-DAG: section ".SCOVP{{\$}}M",
[SanitizerCoverage] Use External on Windows This should fix https://reviews.llvm.org/D98903#2643589 though it is not clear to me why ExternalWeak does not work.
2021-03-23 14:05:36 +08:00
; CHECK: @__start___sancov_cntrs = external hidden global i8
; CHECK: @__stop___sancov_cntrs = external hidden global i8