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#include "test/jemalloc_test.h"
#include "jemalloc/internal/prof_sys.h"
static const char *test_filename = "test_filename";
static bool did_prof_dump_open;
static int
prof_dump_open_file_intercept(const char *filename, int mode) {
int fd;
did_prof_dump_open = true;
/*
* Stronger than a strcmp() - verifying that we internally directly use
* the caller supplied char pointer.
*/
expect_ptr_eq(filename, test_filename,
"Dump file name should be \"%s\"", test_filename);
fd = open("/dev/null", O_WRONLY);
assert_d_ne(fd, -1, "Unexpected open() failure");
return fd;
}
TEST_BEGIN(test_mdump_normal) {
test_skip_if(!config_prof);
prof_dump_open_file_t *open_file_orig = prof_dump_open_file;
void *p = mallocx(1, 0);
assert_ptr_not_null(p, "Unexpected mallocx() failure");
prof_dump_open_file = prof_dump_open_file_intercept;
did_prof_dump_open = false;
expect_d_eq(mallctl("prof.dump", NULL, NULL, (void *)&test_filename,
sizeof(test_filename)), 0,
"Unexpected mallctl failure while dumping");
expect_true(did_prof_dump_open, "Expected a profile dump");
dallocx(p, 0);
prof_dump_open_file = open_file_orig;
}
TEST_END
static int
prof_dump_open_file_error(const char *filename, int mode) {
return -1;
}
/*
* In the context of test_mdump_output_error, prof_dump_write_file_count is the
* total number of times prof_dump_write_file_error() is expected to be called.
* In the context of test_mdump_maps_error, prof_dump_write_file_count is the
* total number of times prof_dump_write_file_error() is expected to be called
* starting from the one that contains an 'M' (beginning the "MAPPED_LIBRARIES"
* header).
*/
static int prof_dump_write_file_count;
static ssize_t
prof_dump_write_file_error(int fd, const void *s, size_t len) {
--prof_dump_write_file_count;
expect_d_ge(prof_dump_write_file_count, 0,
"Write is called after error occurs");
if (prof_dump_write_file_count == 0) {
return -1;
} else {
/*
* Any non-negative number indicates success, and for
* simplicity we just use 0. When prof_dump_write_file_count
* is positive, it means that we haven't reached the write that
* we want to fail; when prof_dump_write_file_count is
* negative, it means that we've already violated the
* expect_d_ge(prof_dump_write_file_count, 0) statement above,
* but instead of aborting, we continue the rest of the test,
* and we indicate that all the writes after the failed write
* are successful.
*/
return 0;
}
}
static void
expect_write_failure(int count) {
prof_dump_write_file_count = count;
expect_d_eq(mallctl("prof.dump", NULL, NULL, (void *)&test_filename,
sizeof(test_filename)), EFAULT, "Dump should err");
expect_d_eq(prof_dump_write_file_count, 0,
"Dumping stopped after a wrong number of writes");
}
TEST_BEGIN(test_mdump_output_error) {
test_skip_if(!config_prof);
test_skip_if(!config_debug);
prof_dump_open_file_t *open_file_orig = prof_dump_open_file;
prof_dump_write_file_t *write_file_orig = prof_dump_write_file;
prof_dump_write_file = prof_dump_write_file_error;
void *p = mallocx(1, 0);
assert_ptr_not_null(p, "Unexpected mallocx() failure");
/*
* When opening the dump file fails, there shouldn't be any write, and
* mallctl() should return failure.
*/
prof_dump_open_file = prof_dump_open_file_error;
expect_write_failure(0);
/*
* When the n-th write fails, there shouldn't be any more write, and
* mallctl() should return failure.
*/
prof_dump_open_file = prof_dump_open_file_intercept;
expect_write_failure(1); /* First write fails. */
expect_write_failure(2); /* Second write fails. */
dallocx(p, 0);
prof_dump_open_file = open_file_orig;
prof_dump_write_file = write_file_orig;
}
TEST_END
static int
prof_dump_open_maps_error() {
return -1;
}
static bool started_piping_maps_file;
static ssize_t
prof_dump_write_maps_file_error(int fd, const void *s, size_t len) {
/* The main dump doesn't contain any capital 'M'. */
if (!started_piping_maps_file && strchr(s, 'M') != NULL) {
started_piping_maps_file = true;
}
if (started_piping_maps_file) {
return prof_dump_write_file_error(fd, s, len);
} else {
/* Return success when we haven't started piping maps. */
return 0;
}
}
static void
expect_maps_write_failure(int count) {
int mfd = prof_dump_open_maps();
if (mfd == -1) {
/* No need to continue if we just can't find the maps file. */
return;
}
close(mfd);
started_piping_maps_file = false;
expect_write_failure(count);
expect_true(started_piping_maps_file, "Should start piping maps");
}
TEST_BEGIN(test_mdump_maps_error) {
test_skip_if(!config_prof);
test_skip_if(!config_debug);
prof_dump_open_file_t *open_file_orig = prof_dump_open_file;
prof_dump_write_file_t *write_file_orig = prof_dump_write_file;
prof_dump_open_maps_t *open_maps_orig = prof_dump_open_maps;
prof_dump_open_file = prof_dump_open_file_intercept;
prof_dump_write_file = prof_dump_write_maps_file_error;
void *p = mallocx(1, 0);
assert_ptr_not_null(p, "Unexpected mallocx() failure");
/*
* When opening the maps file fails, there shouldn't be any maps write,
* and mallctl() should return success.
*/
prof_dump_open_maps = prof_dump_open_maps_error;
started_piping_maps_file = false;
prof_dump_write_file_count = 0;
expect_d_eq(mallctl("prof.dump", NULL, NULL, (void *)&test_filename,
sizeof(test_filename)), 0,
"mallctl should not fail in case of maps file opening failure");
expect_false(started_piping_maps_file, "Shouldn't start piping maps");
expect_d_eq(prof_dump_write_file_count, 0,
"Dumping stopped after a wrong number of writes");
/*
* When the n-th maps write fails (given that we are able to find the
* maps file), there shouldn't be any more maps write, and mallctl()
* should return failure.
*/
prof_dump_open_maps = open_maps_orig;
expect_maps_write_failure(1); /* First write fails. */
expect_maps_write_failure(2); /* Second write fails. */
dallocx(p, 0);
prof_dump_open_file = open_file_orig;
prof_dump_write_file = write_file_orig;
}
TEST_END
int
main(void) {
return test(
test_mdump_normal,
test_mdump_output_error,
test_mdump_maps_error);
}
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