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add frame fuzzing and one query that fails under msan

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This commit is contained in:
Alexander Kuzmenkov 2021-02-03 09:42:54 +03:00
parent 7e945bab03
commit a164abf23e
4 changed files with 52 additions and 0 deletions
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44
programs/client/QueryFuzzer.cpp
View File

@ -325,6 +325,49 @@ void QueryFuzzer::fuzzColumnLikeExpressionList(IAST * ast)
// the generic recursion into IAST.children.
}
void QueryFuzzer::fuzzWindowFrame(WindowFrame & frame)
{
switch (fuzz_rand() % 40)
{
case 0:
{
const auto r = fuzz_rand() % 3;
frame.type = r == 0 ? WindowFrame::FrameType::Rows
: r == 1 ? WindowFrame::FrameType::Range
: WindowFrame::FrameType::Groups;
break;
}
case 1:
{
const auto r = fuzz_rand() % 3;
frame.begin_type = r == 0 ? WindowFrame::BoundaryType::Unbounded
: r == 1 ? WindowFrame::BoundaryType::Current
: WindowFrame::BoundaryType::Offset;
break;
}
case 2:
{
const auto r = fuzz_rand() % 3;
frame.end_type = r == 0 ? WindowFrame::BoundaryType::Unbounded
: r == 1 ? WindowFrame::BoundaryType::Current
: WindowFrame::BoundaryType::Offset;
break;
}
case 3:
{
frame.begin_offset = getRandomField(0).get<Int64>();
break;
}
case 4:
{
frame.end_offset = getRandomField(0).get<Int64>();
break;
}
default:
break;
}
}
void QueryFuzzer::fuzz(ASTs & asts)
{
for (auto & ast : asts)
@ -409,6 +452,7 @@ void QueryFuzzer::fuzz(ASTPtr & ast)
auto & def = fn->window_definition->as<ASTWindowDefinition &>();
fuzzColumnLikeExpressionList(def.partition_by.get());
fuzzOrderByList(def.order_by.get());
fuzzWindowFrame(def.frame);
}
fuzz(fn->children);

2
programs/client/QueryFuzzer.h
View File

@ -14,6 +14,7 @@ namespace DB
class ASTExpressionList;
class ASTOrderByElement;
struct WindowFrame;
/*
* This is an AST-based query fuzzer that makes random modifications to query
@ -65,6 +66,7 @@ struct QueryFuzzer
void fuzzOrderByElement(ASTOrderByElement * elem);
void fuzzOrderByList(IAST * ast);
void fuzzColumnLikeExpressionList(IAST * ast);
void fuzzWindowFrame(WindowFrame & frame);
void fuzz(ASTs & asts);
void fuzz(ASTPtr & ast);
void collectFuzzInfoMain(const ASTPtr ast);

2
tests/queries/0_stateless/01591_window_functions.reference
View File

@ -558,3 +558,5 @@ settings max_block_size = 2;
28 5 3 2 1
29 5 2 1 0
30 6 1 1 0
-- seen a use-after-free under MSan in this query once
SELECT number, max(number) OVER (PARTITION BY intDiv(number, 7) ORDER BY number ASC NULLS LAST ROWS BETWEEN UNBOUNDED PRECEDING AND CURRENT ROW) FROM numbers(1024) SETTINGS max_block_size = 2 FORMAT Null;

4
tests/queries/0_stateless/01591_window_functions.sql
View File

@ -174,3 +174,7 @@ select number, p,
from (select number, intDiv(number, 5) p from numbers(31))
order by p, number
settings max_block_size = 2;
-- seen a use-after-free under MSan in this query once
SELECT number, max(number) OVER (PARTITION BY intDiv(number, 7) ORDER BY number ASC NULLS LAST ROWS BETWEEN UNBOUNDED PRECEDING AND CURRENT ROW) FROM numbers(1024) SETTINGS max_block_size = 2 FORMAT Null;