[PATCH 4/7] perf test: Add a test for strcmp_cpuid_str() expression

[James Clark <james.clark@arm.com>]

Test that the new expression builtin returns a match when the current
escaped CPU ID is given, and that it doesn't match when "0x0" is given.

The CPU ID in test__expr() has to be changed to perf_pmu__getcpuid()
which returns the CPU ID string, rather than the raw CPU ID that
get_cpuid() returns because that can't be used with strcmp_cpuid_str().
It doesn't affect the is_intel test because both versions contain
"Intel".

Signed-off-by: James Clark <james.clark@arm.com>
---
 tools/perf/tests/expr.c | 31 +++++++++++++++++++++++++++----
 1 file changed, 27 insertions(+), 4 deletions(-)

diff --git a/tools/perf/tests/expr.c b/tools/perf/tests/expr.c
index 39be7f3b3a53..78544092ef0c 100644
--- a/tools/perf/tests/expr.c
+++ b/tools/perf/tests/expr.c
@@ -9,6 +9,7 @@
 #include <math.h>
 #include <stdlib.h>
 #include <string.h>
+#include <string2.h>
 #include <linux/zalloc.h>
 
 static int test_ids_union(void)
@@ -74,10 +75,13 @@ static int test__expr(struct test_suite *t __maybe_unused, int subtest __maybe_u
 	int ret;
 	struct expr_parse_ctx *ctx;
 	bool is_intel = false;
-	char buf[128];
+	char strcmp_cpuid_buf[256];
+	struct perf_pmu *pmu = pmu__find_core_pmu();
+	char *cpuid = perf_pmu__getcpuid(pmu);
+	char *escaped_cpuid1, *escaped_cpuid2;
 
-	if (!get_cpuid(buf, sizeof(buf)))
-		is_intel = strstr(buf, "Intel") != NULL;
+	TEST_ASSERT_VAL("get_cpuid", cpuid);
+	is_intel = strstr(cpuid, "Intel") != NULL;
 
 	TEST_ASSERT_EQUAL("ids_union", test_ids_union(), 0);
 
@@ -257,9 +261,28 @@ static int test__expr(struct test_suite *t __maybe_unused, int subtest __maybe_u
 	TEST_ASSERT_VAL("source count", hashmap__size(ctx->ids) == 1);
 	TEST_ASSERT_VAL("source count", hashmap__find(ctx->ids, "EVENT1", &val_ptr));
 
+
+	/* Test no cpuid match */
+	ret = test(ctx, "strcmp_cpuid_str(0x0)", 0);
+
+	/*
+	 * Test cpuid match with current cpuid. Special chars have to be
+	 * escaped.
+	 */
+	escaped_cpuid1 = strreplace_chars('-', cpuid, "\\-");
+	free(cpuid);
+	escaped_cpuid2 = strreplace_chars(',', escaped_cpuid1, "\\,");
+	free(escaped_cpuid1);
+	escaped_cpuid1 = strreplace_chars('=', escaped_cpuid2, "\\=");
+	free(escaped_cpuid2);
+	scnprintf(strcmp_cpuid_buf, sizeof(strcmp_cpuid_buf),
+		  "strcmp_cpuid_str(%s)", escaped_cpuid1);
+	free(escaped_cpuid1);
+	ret |= test(ctx, strcmp_cpuid_buf, 1);
+
 	/* has_event returns 1 when an event exists. */
 	expr__add_id_val(ctx, strdup("cycles"), 2);
-	ret = test(ctx, "has_event(cycles)", 1);
+	ret |= test(ctx, "has_event(cycles)", 1);
 
 	expr__ctx_free(ctx);
 
-- 
2.34.1