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Add parser and printer for coredump filter mask

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This commit is contained in:
Zbigniew Jędrzejewski-Szmek 2020-04-04 15:02:12 +02:00
parent ce51632a35
commit b34612bd5a
5 changed files with 175 additions and 0 deletions
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64
src/shared/coredump-util.c Normal file
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@ -0,0 +1,64 @@
/* SPDX-License-Identifier: LGPL-2.1+ */
#include "coredump-util.h"
#include "extract-word.h"
#include "string-table.h"
static const char *const coredump_filter_table[_COREDUMP_FILTER_MAX] = {
[COREDUMP_FILTER_PRIVATE_ANONYMOUS] = "private-anonymous",
[COREDUMP_FILTER_SHARED_ANONYMOUS] = "shared-anonymous",
[COREDUMP_FILTER_PRIVATE_FILE_BACKED] = "private-file-backed",
[COREDUMP_FILTER_SHARED_FILE_BACKED] = "shared-file-backed",
[COREDUMP_FILTER_ELF_HEADERS] = "elf-headers",
[COREDUMP_FILTER_PRIVATE_HUGE] = "private-huge",
[COREDUMP_FILTER_SHARED_HUGE] = "shared-huge",
[COREDUMP_FILTER_PRIVATE_DAX] = "private-dax",
[COREDUMP_FILTER_SHARED_DAX] = "shared-dax",
};
DEFINE_STRING_TABLE_LOOKUP(coredump_filter, CoredumpFilter);
int coredump_filter_mask_from_string(const char *s, uint64_t *ret) {
uint64_t m = 0;
assert(s);
assert(ret);
for (;;) {
_cleanup_free_ char *n = NULL;
CoredumpFilter v;
int r;
r = extract_first_word(&s, &n, NULL, 0);
if (r < 0)
return r;
if (r == 0)
break;
if (streq(n, "default")) {
m |= COREDUMP_FILTER_MASK_DEFAULT;
continue;
}
if (streq(n, "all")) {
m = UINT64_MAX;
continue;
}
v = coredump_filter_from_string(n);
if (v >= 0) {
m |= 1u << v;
continue;
}
uint64_t x;
r = safe_atoux64(n, &x);
if (r < 0)
return r;
m |= x;
}
*ret = m;
return 0;
}

27
src/shared/coredump-util.h Normal file
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/* SPDX-License-Identifier: LGPL-2.1+ */
#pragma once
#include "macro.h"
typedef enum CoredumpFilter {
COREDUMP_FILTER_PRIVATE_ANONYMOUS = 0,
COREDUMP_FILTER_SHARED_ANONYMOUS,
COREDUMP_FILTER_PRIVATE_FILE_BACKED,
COREDUMP_FILTER_SHARED_FILE_BACKED,
COREDUMP_FILTER_ELF_HEADERS,
COREDUMP_FILTER_PRIVATE_HUGE,
COREDUMP_FILTER_SHARED_HUGE,
COREDUMP_FILTER_PRIVATE_DAX,
COREDUMP_FILTER_SHARED_DAX,
_COREDUMP_FILTER_MAX,
_COREDUMP_FILTER_INVALID = -1,
} CoredumpFilter;
#define COREDUMP_FILTER_MASK_DEFAULT (1u << COREDUMP_FILTER_PRIVATE_ANONYMOUS | \
1u << COREDUMP_FILTER_SHARED_ANONYMOUS | \
1u << COREDUMP_FILTER_ELF_HEADERS | \
1u << COREDUMP_FILTER_PRIVATE_HUGE)
const char* coredump_filter_to_string(CoredumpFilter i) _const_;
CoredumpFilter coredump_filter_from_string(const char *s) _pure_;
int coredump_filter_mask_from_string(const char *s, uint64_t *ret);

2
src/shared/meson.build
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@ -51,6 +51,8 @@ shared_sources = files('''
condition.h
conf-parser.c
conf-parser.h
coredump-util.c
coredump-util.h
cpu-set-util.c
cpu-set-util.h
crypt-util.c

4
src/test/meson.build
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@ -588,6 +588,10 @@ tests += [
[],
[]],
[['src/test/test-coredump-util.c'],
[],
[]],
[['src/test/test-daemon.c'],
[],
[]],

78
src/test/test-coredump-util.c Normal file
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/* SPDX-License-Identifier: LGPL-2.1+ */
#include "alloc-util.h"
#include "coredump-util.h"
#include "macro.h"
#include "tests.h"
static void test_coredump_filter_to_from_string(void) {
log_info("/* %s */", __func__);
for (CoredumpFilter i = 0; i < _COREDUMP_FILTER_MAX; i++) {
const char *n;
assert_se(n = coredump_filter_to_string(i));
log_info("0x%x\t%s", 1<<i, n);
assert_se(coredump_filter_from_string(n) == i);
uint64_t f;
assert_se(coredump_filter_mask_from_string(n, &f) == 0);
assert_se(f == 1u << i);
}
}
static void test_coredump_filter_mask_from_string(void) {
log_info("/* %s */", __func__);
uint64_t f;
assert_se(coredump_filter_mask_from_string("default", &f) == 0);
assert_se(f == COREDUMP_FILTER_MASK_DEFAULT);
assert_se(coredump_filter_mask_from_string(" default\tdefault\tdefault ", &f) == 0);
assert_se(f == COREDUMP_FILTER_MASK_DEFAULT);
assert_se(coredump_filter_mask_from_string("defaulta", &f) < 0);
assert_se(coredump_filter_mask_from_string("default defaulta default", &f) < 0);
assert_se(coredump_filter_mask_from_string("default default defaulta", &f) < 0);
assert_se(coredump_filter_mask_from_string("private-anonymous default", &f) == 0);
assert_se(f == COREDUMP_FILTER_MASK_DEFAULT);
assert_se(coredump_filter_mask_from_string("shared-file-backed shared-dax", &f) == 0);
assert_se(f == (1 << COREDUMP_FILTER_SHARED_FILE_BACKED |
1 << COREDUMP_FILTER_SHARED_DAX));
assert_se(coredump_filter_mask_from_string("private-file-backed private-dax 0xF", &f) == 0);
assert_se(f == (1 << COREDUMP_FILTER_PRIVATE_FILE_BACKED |
1 << COREDUMP_FILTER_PRIVATE_DAX |
0xF));
assert_se(coredump_filter_mask_from_string("11", &f) == 0);
assert_se(f == 0x11);
assert_se(coredump_filter_mask_from_string("0x1101", &f) == 0);
assert_se(f == 0x1101);
assert_se(coredump_filter_mask_from_string("0", &f) == 0);
assert_se(f == 0);
assert_se(coredump_filter_mask_from_string("all", &f) == 0);
assert_se(FLAGS_SET(f, (1 << COREDUMP_FILTER_PRIVATE_ANONYMOUS |
1 << COREDUMP_FILTER_SHARED_ANONYMOUS |
1 << COREDUMP_FILTER_PRIVATE_FILE_BACKED |
1 << COREDUMP_FILTER_SHARED_FILE_BACKED |
1 << COREDUMP_FILTER_ELF_HEADERS |
1 << COREDUMP_FILTER_PRIVATE_HUGE |
1 << COREDUMP_FILTER_SHARED_HUGE |
1 << COREDUMP_FILTER_PRIVATE_DAX |
1 << COREDUMP_FILTER_SHARED_DAX)));
}
int main(int argc, char **argv) {
test_setup_logging(LOG_INFO);
test_coredump_filter_to_from_string();
test_coredump_filter_mask_from_string();
return 0;
}