| lists.openwall.net | lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC | |
|
Open Source and information security mailing list archives
| ||
|
Message-Id: <1411559322-16548-5-git-send-email-eranian@google.com>
Date: Wed, 24 Sep 2014 13:48:40 +0200
From: Stephane Eranian <eranian@...gle.com>
To: linux-kernel@...r.kernel.org
Cc: peterz@...radead.org, mingo@...e.hu, ak@...ux.intel.com,
jolsa@...hat.com, acme@...hat.com, cebbert.lkml@...il.com
Subject: [PATCH v7 4/6] perf/tests: add interrupted state sample parsing test
This patch updates the sample parsing test with support
for the sampling of machine interrupted state.
The patch modifies the do_test() code to sahred the sample
regts bitmask between user and intr regs.
Signed-off-by: Stephane Eranian <eranian@...gle.com>
---
tools/perf/tests/sample-parsing.c | 55 +++++++++++++++++++++++++++----------
1 file changed, 40 insertions(+), 15 deletions(-)
diff --git a/tools/perf/tests/sample-parsing.c b/tools/perf/tests/sample-parsing.c
index ca292f9..4908c64 100644
--- a/tools/perf/tests/sample-parsing.c
+++ b/tools/perf/tests/sample-parsing.c
@@ -126,16 +126,28 @@ static bool samples_same(const struct perf_sample *s1,
if (type & PERF_SAMPLE_TRANSACTION)
COMP(transaction);
+ if (type & PERF_SAMPLE_REGS_INTR) {
+ size_t sz = hweight_long(s1->intr_regs.mask) * sizeof(u64);
+
+ COMP(intr_regs.mask);
+ COMP(intr_regs.abi);
+ if (s1->intr_regs.abi &&
+ (!s1->intr_regs.regs || !s2->intr_regs.regs ||
+ memcmp(s1->intr_regs.regs, s2->intr_regs.regs, sz))) {
+ pr_debug("Samples differ at 'intr_regs'\n");
+ return false;
+ }
+ }
+
return true;
}
-static int do_test(u64 sample_type, u64 sample_regs_user, u64 read_format)
+static int do_test(u64 sample_type, u64 sample_regs, u64 read_format)
{
struct perf_evsel evsel = {
.needs_swap = false,
.attr = {
.sample_type = sample_type,
- .sample_regs_user = sample_regs_user,
.read_format = read_format,
},
};
@@ -154,7 +166,7 @@ static int do_test(u64 sample_type, u64 sample_regs_user, u64 read_format)
/* 1 branch_entry */
.data = {1, 211, 212, 213},
};
- u64 user_regs[64];
+ u64 regs[64];
const u64 raw_data[] = {0x123456780a0b0c0dULL, 0x1102030405060708ULL};
const u64 data[] = {0x2211443366558877ULL, 0, 0xaabbccddeeff4321ULL};
struct perf_sample sample = {
@@ -176,8 +188,8 @@ static int do_test(u64 sample_type, u64 sample_regs_user, u64 read_format)
.branch_stack = &branch_stack.branch_stack,
.user_regs = {
.abi = PERF_SAMPLE_REGS_ABI_64,
- .mask = sample_regs_user,
- .regs = user_regs,
+ .mask = sample_regs,
+ .regs = regs,
},
.user_stack = {
.size = sizeof(data),
@@ -187,14 +199,25 @@ static int do_test(u64 sample_type, u64 sample_regs_user, u64 read_format)
.time_enabled = 0x030a59d664fca7deULL,
.time_running = 0x011b6ae553eb98edULL,
},
+ .intr_regs = {
+ .abi = PERF_SAMPLE_REGS_ABI_64,
+ .mask = sample_regs,
+ .regs = regs,
+ },
};
struct sample_read_value values[] = {{1, 5}, {9, 3}, {2, 7}, {6, 4},};
struct perf_sample sample_out;
size_t i, sz, bufsz;
int err, ret = -1;
- for (i = 0; i < sizeof(user_regs); i++)
- *(i + (u8 *)user_regs) = i & 0xfe;
+ if (sample_type & PERF_SAMPLE_REGS_USER)
+ evsel.attr.sample_regs_user = sample_regs;
+
+ if (sample_type & PERF_SAMPLE_REGS_INTR)
+ evsel.attr.sample_regs_intr = sample_regs;
+
+ for (i = 0; i < sizeof(regs); i++)
+ *(i + (u8 *)regs) = i & 0xfe;
if (read_format & PERF_FORMAT_GROUP) {
sample.read.group.nr = 4;
@@ -271,7 +294,7 @@ int test__sample_parsing(void)
{
const u64 rf[] = {4, 5, 6, 7, 12, 13, 14, 15};
u64 sample_type;
- u64 sample_regs_user;
+ u64 sample_regs;
size_t i;
int err;
@@ -280,7 +303,7 @@ int test__sample_parsing(void)
* were added. Please actually update the test rather than just change
* the condition below.
*/
- if (PERF_SAMPLE_MAX > PERF_SAMPLE_TRANSACTION << 1) {
+ if (PERF_SAMPLE_MAX > PERF_SAMPLE_REGS_INTR << 1) {
pr_debug("sample format has changed, some new PERF_SAMPLE_ bit was introduced - test needs updating\n");
return -1;
}
@@ -297,22 +320,24 @@ int test__sample_parsing(void)
}
continue;
}
+ sample_regs = 0;
if (sample_type == PERF_SAMPLE_REGS_USER)
- sample_regs_user = 0x3fff;
- else
- sample_regs_user = 0;
+ sample_regs = 0x3fff;
+
+ if (sample_type == PERF_SAMPLE_REGS_INTR)
+ sample_regs = 0xff0fff;
- err = do_test(sample_type, sample_regs_user, 0);
+ err = do_test(sample_type, sample_regs, 0);
if (err)
return err;
}
/* Test all sample format bits together */
sample_type = PERF_SAMPLE_MAX - 1;
- sample_regs_user = 0x3fff;
+ sample_regs = 0x3fff; /* shared yb intr and user regs */
for (i = 0; i < ARRAY_SIZE(rf); i++) {
- err = do_test(sample_type, sample_regs_user, rf[i]);
+ err = do_test(sample_type, sample_regs, rf[i]);
if (err)
return err;
}
--
1.7.9.5
--
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@...r.kernel.org
More majordomo info at http://vger.kernel.org/majordomo-info.html
Please read the FAQ at http://www.tux.org/lkml/
Powered by blists - more mailing lists