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#define _POSIX_C_SOURCE 200809L
#include "store.h"
#include <dirent.h>
#include <fcntl.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <sys/stat.h>
#include <sys/wait.h>
#include <unistd.h>
#define CHECK(expr) do { if (!(expr)) { fprintf(stderr, "line %d: %s\n", __LINE__, #expr); exit(1); } } while (0)
static int failed_stage = -1;
static bool crash_at_stage;
int pure_store_test_fault(PureStoreStage stage) {
if ((int)stage != failed_stage) return 0;
if (crash_at_stage) _exit(77);
return 1;
}
typedef struct { unsigned char *bytes; unsigned releases; } Owner;
static void release(void *raw) {
Owner *owner = raw;
free(owner->bytes);
owner->bytes = NULL;
++owner->releases;
}
static void transfers(void) {
Owner owner = {.bytes = malloc(5)};
CHECK(owner.bytes);
memcpy(owner.bytes, "a\0bcd", 5);
PureTransfer transfer = {0};
pure_transfer_init(&transfer, (PureSpan){(const unsigned char *)"head", 4},
(PureSpan){owner.bytes, 5}, &owner, release);
CHECK(!pure_transfer_consume(&transfer, 5));
CHECK(transfer.active && !owner.releases);
CHECK(pure_transfer_consume(&transfer, 0));
unsigned char received[9];
size_t used = 0;
while (transfer.active) {
PureSpan span = pure_transfer_next(&transfer, 2);
CHECK(span.size && span.size <= 2);
memcpy(received + used, span.data, span.size);
used += span.size;
CHECK(pure_transfer_consume(&transfer, span.size));
CHECK((used == 9) == (owner.releases == 1));
}
CHECK(used == 9 && !memcmp(received, "heada\0bcd", 9));
pure_transfer_abort(&transfer);
CHECK(owner.releases == 1 && !pure_transfer_consume(&transfer, 0));
owner.bytes = malloc(3);
CHECK(owner.bytes);
pure_transfer_init(&transfer, (PureSpan){0}, (PureSpan){owner.bytes, 3}, &owner, release);
CHECK(pure_transfer_consume(&transfer, 1));
pure_transfer_abort(&transfer);
pure_transfer_abort(&transfer);
CHECK(owner.releases == 2 && !transfer.active);
pure_transfer_init(&transfer, (PureSpan){0}, (PureSpan){0}, &owner, release);
CHECK(owner.releases == 3 && !transfer.active);
}
static void storage(const char *path) {
CHECK(pure_store_init(path) == PURE_OK);
PureStoredView first, second;
CHECK(pure_store_get(path, "missing", 100, &first) == PURE_NOT_FOUND);
CHECK(!first.mapping && !first.mapped_size);
static const unsigned char original[] = {0, 1, 2, 255, 17};
static const unsigned char updated[] = {9, 8, 7};
int64_t revision;
CHECK(pure_store_put(path, "work", 0, (PureSpan){original, sizeof(original)}, &revision) == PURE_OK);
CHECK(revision == 1);
CHECK(pure_store_get(path, "work", sizeof(original) - 1, &first) == PURE_BUDGET);
CHECK(!first.mapping && !first.mapped_size);
CHECK(pure_store_get_range(path, "work", 1, 3, 3, &first) == PURE_OK);
CHECK(first.object_size == sizeof(original) && first.body.size == 3 && !memcmp(first.body.data, original + 1, 3));
pure_store_release(&first);
CHECK(pure_store_get_range(path, "work", SIZE_MAX, 1, 10, &first) == PURE_LIMIT);
CHECK(pure_store_get_range(path, "work", 1, SIZE_MAX, 10, &first) == PURE_LIMIT);
CHECK(pure_store_get_range(path, "work", 1, 3, 2, &first) == PURE_BUDGET);
CHECK(pure_store_get_range(path, "work", sizeof(original), 0, 0, &first) == PURE_OK);
CHECK(!first.mapped_size && !first.body.size);
pure_store_release(&first);
CHECK(pure_store_get(path, "work", sizeof(original), &first) == PURE_OK);
CHECK(first.body.size == sizeof(original) && first.revision == 1);
CHECK(pure_store_put(path, "work", 1, (PureSpan){updated, sizeof(updated)}, &revision) == PURE_OK);
CHECK(revision == 2);
CHECK(!memcmp(first.body.data, original, sizeof(original)));
CHECK(pure_store_get(path, "work", 100, &second) == PURE_OK);
CHECK(second.revision == 2 && second.body.size == sizeof(updated));
CHECK(!memcmp(second.body.data, updated, sizeof(updated)));
pure_store_release(&first);
pure_store_release(&first);
pure_store_release(&second);
CHECK(pure_store_put(path, "work", 1, (PureSpan){original, sizeof(original)}, &revision) == PURE_CONFLICT);
CHECK(revision == 2);
for (failed_stage = PURE_AFTER_HEADER; failed_stage <= PURE_BEFORE_RENAME; ++failed_stage) {
CHECK(pure_store_put(path, "work", 2, (PureSpan){original, sizeof(original)}, &revision) == PURE_STORE_ERROR);
CHECK(pure_store_get(path, "work", 100, &first) == PURE_OK);
CHECK(first.revision == 2 && !memcmp(first.body.data, updated, sizeof(updated)));
pure_store_release(&first);
}
failed_stage = PURE_BEFORE_DIR_SYNC;
CHECK(pure_store_put(path, "work", 2, (PureSpan){original, sizeof(original)}, &revision) == PURE_UNCERTAIN);
CHECK(revision == 3);
failed_stage = -1;
CHECK(pure_store_get(path, "work", 100, &first) == PURE_OK);
CHECK(first.revision == 3 && !memcmp(first.body.data, original, sizeof(original)));
pure_store_release(&first);
CHECK(pure_store_put(path, "work", 2, (PureSpan){updated, sizeof(updated)}, &revision) == PURE_CONFLICT);
/* A crashed unpublished writer leaves only a private file. A new publisher
* must still use the previous committed version, never an incomplete body. */
pid_t child = fork();
CHECK(child >= 0);
if (!child) {
failed_stage = PURE_AFTER_HEADER;
crash_at_stage = true;
pure_store_put(path, "work", 3, (PureSpan){updated, sizeof(updated)}, &revision);
_exit(78);
}
int status;
CHECK(waitpid(child, &status, 0) == child && WIFEXITED(status) && WEXITSTATUS(status) == 77);
CHECK(pure_store_init(path) == PURE_OK);
CHECK(pure_store_get(path, "work", 100, &first) == PURE_OK);
CHECK(first.revision == 3 && !memcmp(first.body.data, original, sizeof(original)));
pure_store_release(&first);
CHECK(pure_store_put(path, "work", 3, (PureSpan){updated, sizeof(updated)}, &revision) == PURE_OK);
CHECK(revision == 4);
char file[320];
snprintf(file, sizeof(file), "%s/obj-work", path);
int fd = open(file, O_WRONLY);
CHECK(fd >= 0);
const unsigned char maximum[] = {255,255,255,255,255,255,255,127};
CHECK(pwrite(fd, maximum, 8, 8) == 8 && close(fd) == 0);
CHECK(pure_store_put(path, "work", INT64_MAX, (PureSpan){original, sizeof(original)}, &revision) == PURE_LIMIT);
CHECK(pure_store_put(path, "empty", 0, (PureSpan){0}, &revision) == PURE_OK);
CHECK(pure_store_get(path, "empty", 0, &first) == PURE_OK && first.body.size == 0);
pure_store_release(&first);
/* Range mapping crosses page boundaries without copying a whole object. */
long page = sysconf(_SC_PAGESIZE);
CHECK(page >= 128 && (size_t)page <= PURE_OBJECT_LIMIT / 3);
size_t size = (size_t)page * 3, offset = (size_t)page + 13, length = (size_t)page + 105;
unsigned char *bytes = malloc(size);
CHECK(bytes);
for (size_t i = 0; i < size; ++i) bytes[i] = (unsigned char)((i * 17u) ^ (i >> 8) ^ (i >> 16));
CHECK(pure_store_put(path, "range", 0, (PureSpan){bytes, size}, &revision) == PURE_OK);
CHECK(pure_store_get_range(path, "range", offset, length, length, &first) == PURE_OK);
CHECK(first.body.size == length && !memcmp(first.body.data, bytes + offset, length));
pure_store_release(&first);
free(bytes);
snprintf(file, sizeof(file), "%s/obj-broken", path);
fd = open(file, O_CREAT | O_WRONLY | O_EXCL, 0600);
CHECK(fd >= 0 && write(fd, "incomplete", 10) == 10 && close(fd) == 0);
CHECK(pure_store_get(path, "broken", 100, &first) == PURE_STORE_ERROR && !first.mapped_size);
CHECK(pure_store_put(path, "broken", 0, (PureSpan){updated, sizeof(updated)}, &revision) == PURE_STORE_ERROR);
CHECK(pure_store_init(file) == PURE_STORE_ERROR);
struct stat info;
CHECK(stat(file, &info) == 0 && info.st_size == 10);
}
int main(void) {
transfers();
char directory[] = "/tmp/pure-connection-unit-XXXXXX";
CHECK(mkdtemp(directory));
char path[256];
snprintf(path, sizeof(path), "%s/store", directory);
storage(path);
DIR *entries = opendir(path);
CHECK(entries);
struct dirent *entry;
while ((entry = readdir(entries))) {
if (!strcmp(entry->d_name, ".") || !strcmp(entry->d_name, "..")) continue;
CHECK(unlinkat(dirfd(entries), entry->d_name, 0) == 0);
}
CHECK(closedir(entries) == 0 && rmdir(path) == 0);
CHECK(rmdir(directory) == 0);
puts("{\"transfer\":\"partial-consumption-and-single-release\","
"\"storage\":\"mapped-ranges-snapshot-budget-conflict-failure-uncertain-crash-overflow-empty\"}");
return 0;
}
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