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#include "ast/passes/config_analyser.h"
#include "driver.h"
#include "mocks.h"
#include "types.h"
#include "gtest/gtest.h"
namespace bpftrace::test::config_analyser {
using ::testing::_;
using ::testing::HasSubstr;
void test(BPFtrace &bpftrace,
const std::string &input,
std::string_view expected_error,
bool expected_result)
{
ast::ASTContext ast("stdin", input);
std::stringstream msg;
msg << "\nInput:\n" << input << "\n\nOutput:\n";
auto ok = ast::PassManager()
.put(ast)
.put(bpftrace)
.add(CreateParsePass())
.add(ast::CreateConfigPass())
.run();
ASSERT_TRUE(bool(ok)) << msg.str();
EXPECT_EQ(ast.diagnostics().ok(), expected_result) << msg.str();
if (expected_error.data()) {
if (!expected_error.empty() && expected_error[0] == '\n')
expected_error.remove_prefix(1); // Remove initial '\n'
// Reproduce the full string.
std::stringstream out;
ast.diagnostics().emit(out);
EXPECT_EQ(out.str(), expected_error);
}
}
ast::ASTContext test_for_warning(BPFtrace &bpftrace,
const std::string &input,
const std::string &warning,
bool invert)
{
ast::ASTContext ast("stdin", input);
auto ok = ast::PassManager()
.put(ast)
.put(bpftrace)
.add(CreateParsePass())
.add(ast::CreateConfigPass())
.run();
EXPECT_TRUE(bool(ok));
std::stringstream out;
ast.diagnostics().emit(out);
if (invert)
EXPECT_THAT(out.str(), Not(HasSubstr(warning)));
else
EXPECT_THAT(out.str(), HasSubstr(warning));
return ast;
}
ast::ASTContext test_for_warning(const std::string &input,
const std::string &warning)
{
auto bpftrace = get_mock_bpftrace();
return test_for_warning(*bpftrace, input, warning, false);
}
ast::ASTContext test_for_no_warning(const std::string &input,
const std::string &warning)
{
auto bpftrace = get_mock_bpftrace();
return test_for_warning(*bpftrace, input, warning, true);
}
void test(const std::string &input, bool expected_result)
{
auto bpftrace = get_mock_bpftrace();
test(*bpftrace, input, {}, expected_result);
}
void test(const std::string &input,
std::string_view expected_error,
bool expected_result)
{
auto bpftrace = get_mock_bpftrace();
test(*bpftrace, input, expected_error, expected_result);
}
void test(BPFtrace &bpftrace, const std::string &input)
{
test(bpftrace, input, {}, true);
}
TEST(config_analyser, config)
{
test("config = { BAD_CONFIG=1 } begin { }", false);
test("config = { BPFTRACE_MAX_MAP_KEYS=1 } begin { }", true);
test("config = { BPFTRACE_MAX_MAP_KEYS=perf } begin { }", false);
test("config = { BPFTRACE_STACK_MODE=perf } begin { }", true);
test("config = { stack_mode=perf } begin { }", true);
test("config = { BPFTRACE_MAX_MAP_KEYS=1; stack_mode=perf } begin { $ns = "
"nsecs(); }",
true);
test("config = { BPFTRACE_CACHE_USER_SYMBOLS=\"PER_PROGRAM\" } begin { $ns = "
"nsecs(); }",
true);
}
TEST(config_analyser, config_error)
{
test("config = { BAD_CONFIG=1 } begin { }",
R"(stdin:1:12-24: ERROR: BAD_CONFIG: not a known configuration option
config = { BAD_CONFIG=1 } begin { }
~~~~~~~~~~~~
)",
false);
test(
"config = { BPFTRACE_MAX_PROBES = \"hello\" } begin { }",
R"(stdin:1:12-41: ERROR: BPFTRACE_MAX_PROBES: expecting a number, got hello
config = { BPFTRACE_MAX_PROBES = "hello" } begin { }
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
)",
false);
test(
"config = { max_ast_nodes=1 } begin { }",
R"(stdin:1:12-27: ERROR: max_ast_nodes: can only be set as an environment variable
config = { max_ast_nodes=1 } begin { }
~~~~~~~~~~~~~~~
)",
false);
}
TEST(config_analyser, deprecated)
{
test_for_warning("config = { symbol_source=\"symbol_table\" } begin { }",
"symbol_source is deprecated and has no effect");
test_for_warning("config = { symbol_source=\"zzz\" } begin { }",
"symbol_source is deprecated and has no effect");
}
TEST(config_analyser, config_setting)
{
auto bpftrace = get_mock_bpftrace();
EXPECT_NE(bpftrace->config_->max_map_keys, 9);
test(*bpftrace, "config = { BPFTRACE_MAX_MAP_KEYS=9 } begin { }");
EXPECT_EQ(bpftrace->config_->max_map_keys, 9);
EXPECT_NE(bpftrace->config_->stack_mode, StackMode::perf);
test(*bpftrace, "config = { stack_mode=perf } begin { }");
EXPECT_EQ(bpftrace->config_->stack_mode, StackMode::perf);
EXPECT_NE(bpftrace->config_->user_symbol_cache_type,
UserSymbolCacheType::per_program);
EXPECT_NE(bpftrace->config_->log_size, 150);
test(*bpftrace,
"config = { BPFTRACE_CACHE_USER_SYMBOLS=\"PER_PROGRAM\"; log_size=150 "
"} begin { }");
EXPECT_EQ(bpftrace->config_->user_symbol_cache_type,
UserSymbolCacheType::per_program);
EXPECT_EQ(bpftrace->config_->log_size, 150);
}
} // namespace bpftrace::test::config_analyser
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