ASR_BASE
Change-Id: Icf3719cc0afe3eeb3edc7fa80a2eb5199ca9dda1
diff --git a/marvell/linux/tools/perf/util/dso.c b/marvell/linux/tools/perf/util/dso.c
new file mode 100644
index 0000000..7f07a5d
--- /dev/null
+++ b/marvell/linux/tools/perf/util/dso.c
@@ -0,0 +1,1379 @@
+// SPDX-License-Identifier: GPL-2.0
+#include <asm/bug.h>
+#include <linux/kernel.h>
+#include <linux/string.h>
+#include <linux/zalloc.h>
+#include <sys/time.h>
+#include <sys/resource.h>
+#include <sys/types.h>
+#include <sys/stat.h>
+#include <unistd.h>
+#include <errno.h>
+#include <fcntl.h>
+#include <stdlib.h>
+#include <bpf/libbpf.h>
+#include "bpf-event.h"
+#include "compress.h"
+#include "env.h"
+#include "namespaces.h"
+#include "path.h"
+#include "map.h"
+#include "symbol.h"
+#include "srcline.h"
+#include "dso.h"
+#include "dsos.h"
+#include "machine.h"
+#include "auxtrace.h"
+#include "util.h" /* O_CLOEXEC for older systems */
+#include "debug.h"
+#include "string2.h"
+#include "vdso.h"
+
+static const char * const debuglink_paths[] = {
+ "%.0s%s",
+ "%s/%s",
+ "%s/.debug/%s",
+ "/usr/lib/debug%s/%s"
+};
+
+char dso__symtab_origin(const struct dso *dso)
+{
+ static const char origin[] = {
+ [DSO_BINARY_TYPE__KALLSYMS] = 'k',
+ [DSO_BINARY_TYPE__VMLINUX] = 'v',
+ [DSO_BINARY_TYPE__JAVA_JIT] = 'j',
+ [DSO_BINARY_TYPE__DEBUGLINK] = 'l',
+ [DSO_BINARY_TYPE__BUILD_ID_CACHE] = 'B',
+ [DSO_BINARY_TYPE__BUILD_ID_CACHE_DEBUGINFO] = 'D',
+ [DSO_BINARY_TYPE__FEDORA_DEBUGINFO] = 'f',
+ [DSO_BINARY_TYPE__UBUNTU_DEBUGINFO] = 'u',
+ [DSO_BINARY_TYPE__MIXEDUP_UBUNTU_DEBUGINFO] = 'x',
+ [DSO_BINARY_TYPE__OPENEMBEDDED_DEBUGINFO] = 'o',
+ [DSO_BINARY_TYPE__BUILDID_DEBUGINFO] = 'b',
+ [DSO_BINARY_TYPE__SYSTEM_PATH_DSO] = 'd',
+ [DSO_BINARY_TYPE__SYSTEM_PATH_KMODULE] = 'K',
+ [DSO_BINARY_TYPE__SYSTEM_PATH_KMODULE_COMP] = 'm',
+ [DSO_BINARY_TYPE__GUEST_KALLSYMS] = 'g',
+ [DSO_BINARY_TYPE__GUEST_KMODULE] = 'G',
+ [DSO_BINARY_TYPE__GUEST_KMODULE_COMP] = 'M',
+ [DSO_BINARY_TYPE__GUEST_VMLINUX] = 'V',
+ };
+
+ if (dso == NULL || dso->symtab_type == DSO_BINARY_TYPE__NOT_FOUND)
+ return '!';
+ return origin[dso->symtab_type];
+}
+
+int dso__read_binary_type_filename(const struct dso *dso,
+ enum dso_binary_type type,
+ char *root_dir, char *filename, size_t size)
+{
+ char build_id_hex[SBUILD_ID_SIZE];
+ int ret = 0;
+ size_t len;
+
+ switch (type) {
+ case DSO_BINARY_TYPE__DEBUGLINK:
+ {
+ const char *last_slash;
+ char dso_dir[PATH_MAX];
+ char symfile[PATH_MAX];
+ unsigned int i;
+
+ len = __symbol__join_symfs(filename, size, dso->long_name);
+ last_slash = filename + len;
+ while (last_slash != filename && *last_slash != '/')
+ last_slash--;
+
+ strncpy(dso_dir, filename, last_slash - filename);
+ dso_dir[last_slash-filename] = '\0';
+
+ if (!is_regular_file(filename)) {
+ ret = -1;
+ break;
+ }
+
+ ret = filename__read_debuglink(filename, symfile, PATH_MAX);
+ if (ret)
+ break;
+
+ /* Check predefined locations where debug file might reside */
+ ret = -1;
+ for (i = 0; i < ARRAY_SIZE(debuglink_paths); i++) {
+ snprintf(filename, size,
+ debuglink_paths[i], dso_dir, symfile);
+ if (is_regular_file(filename)) {
+ ret = 0;
+ break;
+ }
+ }
+
+ break;
+ }
+ case DSO_BINARY_TYPE__BUILD_ID_CACHE:
+ if (dso__build_id_filename(dso, filename, size, false) == NULL)
+ ret = -1;
+ break;
+
+ case DSO_BINARY_TYPE__BUILD_ID_CACHE_DEBUGINFO:
+ if (dso__build_id_filename(dso, filename, size, true) == NULL)
+ ret = -1;
+ break;
+
+ case DSO_BINARY_TYPE__FEDORA_DEBUGINFO:
+ len = __symbol__join_symfs(filename, size, "/usr/lib/debug");
+ snprintf(filename + len, size - len, "%s.debug", dso->long_name);
+ break;
+
+ case DSO_BINARY_TYPE__UBUNTU_DEBUGINFO:
+ len = __symbol__join_symfs(filename, size, "/usr/lib/debug");
+ snprintf(filename + len, size - len, "%s", dso->long_name);
+ break;
+
+ case DSO_BINARY_TYPE__MIXEDUP_UBUNTU_DEBUGINFO:
+ /*
+ * Ubuntu can mixup /usr/lib with /lib, putting debuginfo in
+ * /usr/lib/debug/lib when it is expected to be in
+ * /usr/lib/debug/usr/lib
+ */
+ if (strlen(dso->long_name) < 9 ||
+ strncmp(dso->long_name, "/usr/lib/", 9)) {
+ ret = -1;
+ break;
+ }
+ len = __symbol__join_symfs(filename, size, "/usr/lib/debug");
+ snprintf(filename + len, size - len, "%s", dso->long_name + 4);
+ break;
+
+ case DSO_BINARY_TYPE__OPENEMBEDDED_DEBUGINFO:
+ {
+ const char *last_slash;
+ size_t dir_size;
+
+ last_slash = dso->long_name + dso->long_name_len;
+ while (last_slash != dso->long_name && *last_slash != '/')
+ last_slash--;
+
+ len = __symbol__join_symfs(filename, size, "");
+ dir_size = last_slash - dso->long_name + 2;
+ if (dir_size > (size - len)) {
+ ret = -1;
+ break;
+ }
+ len += scnprintf(filename + len, dir_size, "%s", dso->long_name);
+ len += scnprintf(filename + len , size - len, ".debug%s",
+ last_slash);
+ break;
+ }
+
+ case DSO_BINARY_TYPE__BUILDID_DEBUGINFO:
+ if (!dso->has_build_id) {
+ ret = -1;
+ break;
+ }
+
+ build_id__sprintf(dso->build_id,
+ sizeof(dso->build_id),
+ build_id_hex);
+ len = __symbol__join_symfs(filename, size, "/usr/lib/debug/.build-id/");
+ snprintf(filename + len, size - len, "%.2s/%s.debug",
+ build_id_hex, build_id_hex + 2);
+ break;
+
+ case DSO_BINARY_TYPE__VMLINUX:
+ case DSO_BINARY_TYPE__GUEST_VMLINUX:
+ case DSO_BINARY_TYPE__SYSTEM_PATH_DSO:
+ __symbol__join_symfs(filename, size, dso->long_name);
+ break;
+
+ case DSO_BINARY_TYPE__GUEST_KMODULE:
+ case DSO_BINARY_TYPE__GUEST_KMODULE_COMP:
+ path__join3(filename, size, symbol_conf.symfs,
+ root_dir, dso->long_name);
+ break;
+
+ case DSO_BINARY_TYPE__SYSTEM_PATH_KMODULE:
+ case DSO_BINARY_TYPE__SYSTEM_PATH_KMODULE_COMP:
+ __symbol__join_symfs(filename, size, dso->long_name);
+ break;
+
+ case DSO_BINARY_TYPE__KCORE:
+ case DSO_BINARY_TYPE__GUEST_KCORE:
+ snprintf(filename, size, "%s", dso->long_name);
+ break;
+
+ default:
+ case DSO_BINARY_TYPE__KALLSYMS:
+ case DSO_BINARY_TYPE__GUEST_KALLSYMS:
+ case DSO_BINARY_TYPE__JAVA_JIT:
+ case DSO_BINARY_TYPE__BPF_PROG_INFO:
+ case DSO_BINARY_TYPE__NOT_FOUND:
+ ret = -1;
+ break;
+ }
+
+ return ret;
+}
+
+enum {
+ COMP_ID__NONE = 0,
+};
+
+static const struct {
+ const char *fmt;
+ int (*decompress)(const char *input, int output);
+ bool (*is_compressed)(const char *input);
+} compressions[] = {
+ [COMP_ID__NONE] = { .fmt = NULL, },
+#ifdef HAVE_ZLIB_SUPPORT
+ { "gz", gzip_decompress_to_file, gzip_is_compressed },
+#endif
+#ifdef HAVE_LZMA_SUPPORT
+ { "xz", lzma_decompress_to_file, lzma_is_compressed },
+#endif
+ { NULL, NULL, NULL },
+};
+
+static int is_supported_compression(const char *ext)
+{
+ unsigned i;
+
+ for (i = 1; compressions[i].fmt; i++) {
+ if (!strcmp(ext, compressions[i].fmt))
+ return i;
+ }
+ return COMP_ID__NONE;
+}
+
+bool is_kernel_module(const char *pathname, int cpumode)
+{
+ struct kmod_path m;
+ int mode = cpumode & PERF_RECORD_MISC_CPUMODE_MASK;
+
+ WARN_ONCE(mode != cpumode,
+ "Internal error: passing unmasked cpumode (%x) to is_kernel_module",
+ cpumode);
+
+ switch (mode) {
+ case PERF_RECORD_MISC_USER:
+ case PERF_RECORD_MISC_HYPERVISOR:
+ case PERF_RECORD_MISC_GUEST_USER:
+ return false;
+ /* Treat PERF_RECORD_MISC_CPUMODE_UNKNOWN as kernel */
+ default:
+ if (kmod_path__parse(&m, pathname)) {
+ pr_err("Failed to check whether %s is a kernel module or not. Assume it is.",
+ pathname);
+ return true;
+ }
+ }
+
+ return m.kmod;
+}
+
+bool dso__needs_decompress(struct dso *dso)
+{
+ return dso->symtab_type == DSO_BINARY_TYPE__SYSTEM_PATH_KMODULE_COMP ||
+ dso->symtab_type == DSO_BINARY_TYPE__GUEST_KMODULE_COMP;
+}
+
+static int decompress_kmodule(struct dso *dso, const char *name,
+ char *pathname, size_t len)
+{
+ char tmpbuf[] = KMOD_DECOMP_NAME;
+ int fd = -1;
+
+ if (!dso__needs_decompress(dso))
+ return -1;
+
+ if (dso->comp == COMP_ID__NONE)
+ return -1;
+
+ /*
+ * We have proper compression id for DSO and yet the file
+ * behind the 'name' can still be plain uncompressed object.
+ *
+ * The reason is behind the logic we open the DSO object files,
+ * when we try all possible 'debug' objects until we find the
+ * data. So even if the DSO is represented by 'krava.xz' module,
+ * we can end up here opening ~/.debug/....23432432/debug' file
+ * which is not compressed.
+ *
+ * To keep this transparent, we detect this and return the file
+ * descriptor to the uncompressed file.
+ */
+ if (!compressions[dso->comp].is_compressed(name))
+ return open(name, O_RDONLY);
+
+ fd = mkstemp(tmpbuf);
+ if (fd < 0) {
+ dso->load_errno = errno;
+ return -1;
+ }
+
+ if (compressions[dso->comp].decompress(name, fd)) {
+ dso->load_errno = DSO_LOAD_ERRNO__DECOMPRESSION_FAILURE;
+ close(fd);
+ fd = -1;
+ }
+
+ if (!pathname || (fd < 0))
+ unlink(tmpbuf);
+
+ if (pathname && (fd >= 0))
+ strlcpy(pathname, tmpbuf, len);
+
+ return fd;
+}
+
+int dso__decompress_kmodule_fd(struct dso *dso, const char *name)
+{
+ return decompress_kmodule(dso, name, NULL, 0);
+}
+
+int dso__decompress_kmodule_path(struct dso *dso, const char *name,
+ char *pathname, size_t len)
+{
+ int fd = decompress_kmodule(dso, name, pathname, len);
+
+ close(fd);
+ return fd >= 0 ? 0 : -1;
+}
+
+/*
+ * Parses kernel module specified in @path and updates
+ * @m argument like:
+ *
+ * @comp - true if @path contains supported compression suffix,
+ * false otherwise
+ * @kmod - true if @path contains '.ko' suffix in right position,
+ * false otherwise
+ * @name - if (@alloc_name && @kmod) is true, it contains strdup-ed base name
+ * of the kernel module without suffixes, otherwise strudup-ed
+ * base name of @path
+ * @ext - if (@alloc_ext && @comp) is true, it contains strdup-ed string
+ * the compression suffix
+ *
+ * Returns 0 if there's no strdup error, -ENOMEM otherwise.
+ */
+int __kmod_path__parse(struct kmod_path *m, const char *path,
+ bool alloc_name)
+{
+ const char *name = strrchr(path, '/');
+ const char *ext = strrchr(path, '.');
+ bool is_simple_name = false;
+
+ memset(m, 0x0, sizeof(*m));
+ name = name ? name + 1 : path;
+
+ /*
+ * '.' is also a valid character for module name. For example:
+ * [aaa.bbb] is a valid module name. '[' should have higher
+ * priority than '.ko' suffix.
+ *
+ * The kernel names are from machine__mmap_name. Such
+ * name should belong to kernel itself, not kernel module.
+ */
+ if (name[0] == '[') {
+ is_simple_name = true;
+ if ((strncmp(name, "[kernel.kallsyms]", 17) == 0) ||
+ (strncmp(name, "[guest.kernel.kallsyms", 22) == 0) ||
+ (strncmp(name, "[vdso]", 6) == 0) ||
+ (strncmp(name, "[vdso32]", 8) == 0) ||
+ (strncmp(name, "[vdsox32]", 9) == 0) ||
+ (strncmp(name, "[vsyscall]", 10) == 0)) {
+ m->kmod = false;
+
+ } else
+ m->kmod = true;
+ }
+
+ /* No extension, just return name. */
+ if ((ext == NULL) || is_simple_name) {
+ if (alloc_name) {
+ m->name = strdup(name);
+ return m->name ? 0 : -ENOMEM;
+ }
+ return 0;
+ }
+
+ m->comp = is_supported_compression(ext + 1);
+ if (m->comp > COMP_ID__NONE)
+ ext -= 3;
+
+ /* Check .ko extension only if there's enough name left. */
+ if (ext > name)
+ m->kmod = !strncmp(ext, ".ko", 3);
+
+ if (alloc_name) {
+ if (m->kmod) {
+ if (asprintf(&m->name, "[%.*s]", (int) (ext - name), name) == -1)
+ return -ENOMEM;
+ } else {
+ if (asprintf(&m->name, "%s", name) == -1)
+ return -ENOMEM;
+ }
+
+ strreplace(m->name, '-', '_');
+ }
+
+ return 0;
+}
+
+void dso__set_module_info(struct dso *dso, struct kmod_path *m,
+ struct machine *machine)
+{
+ if (machine__is_host(machine))
+ dso->symtab_type = DSO_BINARY_TYPE__SYSTEM_PATH_KMODULE;
+ else
+ dso->symtab_type = DSO_BINARY_TYPE__GUEST_KMODULE;
+
+ /* _KMODULE_COMP should be next to _KMODULE */
+ if (m->kmod && m->comp) {
+ dso->symtab_type++;
+ dso->comp = m->comp;
+ }
+
+ dso__set_short_name(dso, strdup(m->name), true);
+}
+
+/*
+ * Global list of open DSOs and the counter.
+ */
+static LIST_HEAD(dso__data_open);
+static long dso__data_open_cnt;
+static pthread_mutex_t dso__data_open_lock = PTHREAD_MUTEX_INITIALIZER;
+
+static void dso__list_add(struct dso *dso)
+{
+ list_add_tail(&dso->data.open_entry, &dso__data_open);
+ dso__data_open_cnt++;
+}
+
+static void dso__list_del(struct dso *dso)
+{
+ list_del_init(&dso->data.open_entry);
+ WARN_ONCE(dso__data_open_cnt <= 0,
+ "DSO data fd counter out of bounds.");
+ dso__data_open_cnt--;
+}
+
+static void close_first_dso(void);
+
+static int do_open(char *name)
+{
+ int fd;
+ char sbuf[STRERR_BUFSIZE];
+
+ do {
+ fd = open(name, O_RDONLY|O_CLOEXEC);
+ if (fd >= 0)
+ return fd;
+
+ pr_debug("dso open failed: %s\n",
+ str_error_r(errno, sbuf, sizeof(sbuf)));
+ if (!dso__data_open_cnt || errno != EMFILE)
+ break;
+
+ close_first_dso();
+ } while (1);
+
+ return -1;
+}
+
+static int __open_dso(struct dso *dso, struct machine *machine)
+{
+ int fd = -EINVAL;
+ char *root_dir = (char *)"";
+ char *name = malloc(PATH_MAX);
+ bool decomp = false;
+
+ if (!name)
+ return -ENOMEM;
+
+ if (machine)
+ root_dir = machine->root_dir;
+
+ if (dso__read_binary_type_filename(dso, dso->binary_type,
+ root_dir, name, PATH_MAX))
+ goto out;
+
+ if (!is_regular_file(name))
+ goto out;
+
+ if (dso__needs_decompress(dso)) {
+ char newpath[KMOD_DECOMP_LEN];
+ size_t len = sizeof(newpath);
+
+ if (dso__decompress_kmodule_path(dso, name, newpath, len) < 0) {
+ fd = -dso->load_errno;
+ goto out;
+ }
+
+ decomp = true;
+ strcpy(name, newpath);
+ }
+
+ fd = do_open(name);
+
+ if (decomp)
+ unlink(name);
+
+out:
+ free(name);
+ return fd;
+}
+
+static void check_data_close(void);
+
+/**
+ * dso_close - Open DSO data file
+ * @dso: dso object
+ *
+ * Open @dso's data file descriptor and updates
+ * list/count of open DSO objects.
+ */
+static int open_dso(struct dso *dso, struct machine *machine)
+{
+ int fd;
+ struct nscookie nsc;
+
+ if (dso->binary_type != DSO_BINARY_TYPE__BUILD_ID_CACHE)
+ nsinfo__mountns_enter(dso->nsinfo, &nsc);
+ fd = __open_dso(dso, machine);
+ if (dso->binary_type != DSO_BINARY_TYPE__BUILD_ID_CACHE)
+ nsinfo__mountns_exit(&nsc);
+
+ if (fd >= 0) {
+ dso__list_add(dso);
+ /*
+ * Check if we crossed the allowed number
+ * of opened DSOs and close one if needed.
+ */
+ check_data_close();
+ }
+
+ return fd;
+}
+
+static void close_data_fd(struct dso *dso)
+{
+ if (dso->data.fd >= 0) {
+ close(dso->data.fd);
+ dso->data.fd = -1;
+ dso->data.file_size = 0;
+ dso__list_del(dso);
+ }
+}
+
+/**
+ * dso_close - Close DSO data file
+ * @dso: dso object
+ *
+ * Close @dso's data file descriptor and updates
+ * list/count of open DSO objects.
+ */
+static void close_dso(struct dso *dso)
+{
+ close_data_fd(dso);
+}
+
+static void close_first_dso(void)
+{
+ struct dso *dso;
+
+ dso = list_first_entry(&dso__data_open, struct dso, data.open_entry);
+ close_dso(dso);
+}
+
+static rlim_t get_fd_limit(void)
+{
+ struct rlimit l;
+ rlim_t limit = 0;
+
+ /* Allow half of the current open fd limit. */
+ if (getrlimit(RLIMIT_NOFILE, &l) == 0) {
+ if (l.rlim_cur == RLIM_INFINITY)
+ limit = l.rlim_cur;
+ else
+ limit = l.rlim_cur / 2;
+ } else {
+ pr_err("failed to get fd limit\n");
+ limit = 1;
+ }
+
+ return limit;
+}
+
+static rlim_t fd_limit;
+
+/*
+ * Used only by tests/dso-data.c to reset the environment
+ * for tests. I dont expect we should change this during
+ * standard runtime.
+ */
+void reset_fd_limit(void)
+{
+ fd_limit = 0;
+}
+
+static bool may_cache_fd(void)
+{
+ if (!fd_limit)
+ fd_limit = get_fd_limit();
+
+ if (fd_limit == RLIM_INFINITY)
+ return true;
+
+ return fd_limit > (rlim_t) dso__data_open_cnt;
+}
+
+/*
+ * Check and close LRU dso if we crossed allowed limit
+ * for opened dso file descriptors. The limit is half
+ * of the RLIMIT_NOFILE files opened.
+*/
+static void check_data_close(void)
+{
+ bool cache_fd = may_cache_fd();
+
+ if (!cache_fd)
+ close_first_dso();
+}
+
+/**
+ * dso__data_close - Close DSO data file
+ * @dso: dso object
+ *
+ * External interface to close @dso's data file descriptor.
+ */
+void dso__data_close(struct dso *dso)
+{
+ pthread_mutex_lock(&dso__data_open_lock);
+ close_dso(dso);
+ pthread_mutex_unlock(&dso__data_open_lock);
+}
+
+static void try_to_open_dso(struct dso *dso, struct machine *machine)
+{
+ enum dso_binary_type binary_type_data[] = {
+ DSO_BINARY_TYPE__BUILD_ID_CACHE,
+ DSO_BINARY_TYPE__SYSTEM_PATH_DSO,
+ DSO_BINARY_TYPE__NOT_FOUND,
+ };
+ int i = 0;
+
+ if (dso->data.fd >= 0)
+ return;
+
+ if (dso->binary_type != DSO_BINARY_TYPE__NOT_FOUND) {
+ dso->data.fd = open_dso(dso, machine);
+ goto out;
+ }
+
+ do {
+ dso->binary_type = binary_type_data[i++];
+
+ dso->data.fd = open_dso(dso, machine);
+ if (dso->data.fd >= 0)
+ goto out;
+
+ } while (dso->binary_type != DSO_BINARY_TYPE__NOT_FOUND);
+out:
+ if (dso->data.fd >= 0)
+ dso->data.status = DSO_DATA_STATUS_OK;
+ else
+ dso->data.status = DSO_DATA_STATUS_ERROR;
+}
+
+/**
+ * dso__data_get_fd - Get dso's data file descriptor
+ * @dso: dso object
+ * @machine: machine object
+ *
+ * External interface to find dso's file, open it and
+ * returns file descriptor. It should be paired with
+ * dso__data_put_fd() if it returns non-negative value.
+ */
+int dso__data_get_fd(struct dso *dso, struct machine *machine)
+{
+ if (dso->data.status == DSO_DATA_STATUS_ERROR)
+ return -1;
+
+ if (pthread_mutex_lock(&dso__data_open_lock) < 0)
+ return -1;
+
+ try_to_open_dso(dso, machine);
+
+ if (dso->data.fd < 0)
+ pthread_mutex_unlock(&dso__data_open_lock);
+
+ return dso->data.fd;
+}
+
+void dso__data_put_fd(struct dso *dso __maybe_unused)
+{
+ pthread_mutex_unlock(&dso__data_open_lock);
+}
+
+bool dso__data_status_seen(struct dso *dso, enum dso_data_status_seen by)
+{
+ u32 flag = 1 << by;
+
+ if (dso->data.status_seen & flag)
+ return true;
+
+ dso->data.status_seen |= flag;
+
+ return false;
+}
+
+static ssize_t bpf_read(struct dso *dso, u64 offset, char *data)
+{
+ struct bpf_prog_info_node *node;
+ ssize_t size = DSO__DATA_CACHE_SIZE;
+ u64 len;
+ u8 *buf;
+
+ node = perf_env__find_bpf_prog_info(dso->bpf_prog.env, dso->bpf_prog.id);
+ if (!node || !node->info_linear) {
+ dso->data.status = DSO_DATA_STATUS_ERROR;
+ return -1;
+ }
+
+ len = node->info_linear->info.jited_prog_len;
+ buf = (u8 *)(uintptr_t)node->info_linear->info.jited_prog_insns;
+
+ if (offset >= len)
+ return -1;
+
+ size = (ssize_t)min(len - offset, (u64)size);
+ memcpy(data, buf + offset, size);
+ return size;
+}
+
+static int bpf_size(struct dso *dso)
+{
+ struct bpf_prog_info_node *node;
+
+ node = perf_env__find_bpf_prog_info(dso->bpf_prog.env, dso->bpf_prog.id);
+ if (!node || !node->info_linear) {
+ dso->data.status = DSO_DATA_STATUS_ERROR;
+ return -1;
+ }
+
+ dso->data.file_size = node->info_linear->info.jited_prog_len;
+ return 0;
+}
+
+static void
+dso_cache__free(struct dso *dso)
+{
+ struct rb_root *root = &dso->data.cache;
+ struct rb_node *next = rb_first(root);
+
+ pthread_mutex_lock(&dso->lock);
+ while (next) {
+ struct dso_cache *cache;
+
+ cache = rb_entry(next, struct dso_cache, rb_node);
+ next = rb_next(&cache->rb_node);
+ rb_erase(&cache->rb_node, root);
+ free(cache);
+ }
+ pthread_mutex_unlock(&dso->lock);
+}
+
+static struct dso_cache *dso_cache__find(struct dso *dso, u64 offset)
+{
+ const struct rb_root *root = &dso->data.cache;
+ struct rb_node * const *p = &root->rb_node;
+ const struct rb_node *parent = NULL;
+ struct dso_cache *cache;
+
+ while (*p != NULL) {
+ u64 end;
+
+ parent = *p;
+ cache = rb_entry(parent, struct dso_cache, rb_node);
+ end = cache->offset + DSO__DATA_CACHE_SIZE;
+
+ if (offset < cache->offset)
+ p = &(*p)->rb_left;
+ else if (offset >= end)
+ p = &(*p)->rb_right;
+ else
+ return cache;
+ }
+
+ return NULL;
+}
+
+static struct dso_cache *
+dso_cache__insert(struct dso *dso, struct dso_cache *new)
+{
+ struct rb_root *root = &dso->data.cache;
+ struct rb_node **p = &root->rb_node;
+ struct rb_node *parent = NULL;
+ struct dso_cache *cache;
+ u64 offset = new->offset;
+
+ pthread_mutex_lock(&dso->lock);
+ while (*p != NULL) {
+ u64 end;
+
+ parent = *p;
+ cache = rb_entry(parent, struct dso_cache, rb_node);
+ end = cache->offset + DSO__DATA_CACHE_SIZE;
+
+ if (offset < cache->offset)
+ p = &(*p)->rb_left;
+ else if (offset >= end)
+ p = &(*p)->rb_right;
+ else
+ goto out;
+ }
+
+ rb_link_node(&new->rb_node, parent, p);
+ rb_insert_color(&new->rb_node, root);
+
+ cache = NULL;
+out:
+ pthread_mutex_unlock(&dso->lock);
+ return cache;
+}
+
+static ssize_t
+dso_cache__memcpy(struct dso_cache *cache, u64 offset,
+ u8 *data, u64 size)
+{
+ u64 cache_offset = offset - cache->offset;
+ u64 cache_size = min(cache->size - cache_offset, size);
+
+ memcpy(data, cache->data + cache_offset, cache_size);
+ return cache_size;
+}
+
+static ssize_t file_read(struct dso *dso, struct machine *machine,
+ u64 offset, char *data)
+{
+ ssize_t ret;
+
+ pthread_mutex_lock(&dso__data_open_lock);
+
+ /*
+ * dso->data.fd might be closed if other thread opened another
+ * file (dso) due to open file limit (RLIMIT_NOFILE).
+ */
+ try_to_open_dso(dso, machine);
+
+ if (dso->data.fd < 0) {
+ dso->data.status = DSO_DATA_STATUS_ERROR;
+ ret = -errno;
+ goto out;
+ }
+
+ ret = pread(dso->data.fd, data, DSO__DATA_CACHE_SIZE, offset);
+out:
+ pthread_mutex_unlock(&dso__data_open_lock);
+ return ret;
+}
+
+static ssize_t
+dso_cache__read(struct dso *dso, struct machine *machine,
+ u64 offset, u8 *data, ssize_t size)
+{
+ u64 cache_offset = offset & DSO__DATA_CACHE_MASK;
+ struct dso_cache *cache;
+ struct dso_cache *old;
+ ssize_t ret;
+
+ cache = zalloc(sizeof(*cache) + DSO__DATA_CACHE_SIZE);
+ if (!cache)
+ return -ENOMEM;
+
+ if (dso->binary_type == DSO_BINARY_TYPE__BPF_PROG_INFO)
+ ret = bpf_read(dso, cache_offset, cache->data);
+ else
+ ret = file_read(dso, machine, cache_offset, cache->data);
+
+ if (ret > 0) {
+ cache->offset = cache_offset;
+ cache->size = ret;
+
+ old = dso_cache__insert(dso, cache);
+ if (old) {
+ /* we lose the race */
+ free(cache);
+ cache = old;
+ }
+
+ ret = dso_cache__memcpy(cache, offset, data, size);
+ }
+
+ if (ret <= 0)
+ free(cache);
+
+ return ret;
+}
+
+static ssize_t dso_cache_read(struct dso *dso, struct machine *machine,
+ u64 offset, u8 *data, ssize_t size)
+{
+ struct dso_cache *cache;
+
+ cache = dso_cache__find(dso, offset);
+ if (cache)
+ return dso_cache__memcpy(cache, offset, data, size);
+ else
+ return dso_cache__read(dso, machine, offset, data, size);
+}
+
+/*
+ * Reads and caches dso data DSO__DATA_CACHE_SIZE size chunks
+ * in the rb_tree. Any read to already cached data is served
+ * by cached data.
+ */
+static ssize_t cached_read(struct dso *dso, struct machine *machine,
+ u64 offset, u8 *data, ssize_t size)
+{
+ ssize_t r = 0;
+ u8 *p = data;
+
+ do {
+ ssize_t ret;
+
+ ret = dso_cache_read(dso, machine, offset, p, size);
+ if (ret < 0)
+ return ret;
+
+ /* Reached EOF, return what we have. */
+ if (!ret)
+ break;
+
+ BUG_ON(ret > size);
+
+ r += ret;
+ p += ret;
+ offset += ret;
+ size -= ret;
+
+ } while (size);
+
+ return r;
+}
+
+static int file_size(struct dso *dso, struct machine *machine)
+{
+ int ret = 0;
+ struct stat st;
+ char sbuf[STRERR_BUFSIZE];
+
+ pthread_mutex_lock(&dso__data_open_lock);
+
+ /*
+ * dso->data.fd might be closed if other thread opened another
+ * file (dso) due to open file limit (RLIMIT_NOFILE).
+ */
+ try_to_open_dso(dso, machine);
+
+ if (dso->data.fd < 0) {
+ ret = -errno;
+ dso->data.status = DSO_DATA_STATUS_ERROR;
+ goto out;
+ }
+
+ if (fstat(dso->data.fd, &st) < 0) {
+ ret = -errno;
+ pr_err("dso cache fstat failed: %s\n",
+ str_error_r(errno, sbuf, sizeof(sbuf)));
+ dso->data.status = DSO_DATA_STATUS_ERROR;
+ goto out;
+ }
+ dso->data.file_size = st.st_size;
+
+out:
+ pthread_mutex_unlock(&dso__data_open_lock);
+ return ret;
+}
+
+int dso__data_file_size(struct dso *dso, struct machine *machine)
+{
+ if (dso->data.file_size)
+ return 0;
+
+ if (dso->data.status == DSO_DATA_STATUS_ERROR)
+ return -1;
+
+ if (dso->binary_type == DSO_BINARY_TYPE__BPF_PROG_INFO)
+ return bpf_size(dso);
+
+ return file_size(dso, machine);
+}
+
+/**
+ * dso__data_size - Return dso data size
+ * @dso: dso object
+ * @machine: machine object
+ *
+ * Return: dso data size
+ */
+off_t dso__data_size(struct dso *dso, struct machine *machine)
+{
+ if (dso__data_file_size(dso, machine))
+ return -1;
+
+ /* For now just estimate dso data size is close to file size */
+ return dso->data.file_size;
+}
+
+static ssize_t data_read_offset(struct dso *dso, struct machine *machine,
+ u64 offset, u8 *data, ssize_t size)
+{
+ if (dso__data_file_size(dso, machine))
+ return -1;
+
+ /* Check the offset sanity. */
+ if (offset > dso->data.file_size)
+ return -1;
+
+ if (offset + size < offset)
+ return -1;
+
+ return cached_read(dso, machine, offset, data, size);
+}
+
+/**
+ * dso__data_read_offset - Read data from dso file offset
+ * @dso: dso object
+ * @machine: machine object
+ * @offset: file offset
+ * @data: buffer to store data
+ * @size: size of the @data buffer
+ *
+ * External interface to read data from dso file offset. Open
+ * dso data file and use cached_read to get the data.
+ */
+ssize_t dso__data_read_offset(struct dso *dso, struct machine *machine,
+ u64 offset, u8 *data, ssize_t size)
+{
+ if (dso->data.status == DSO_DATA_STATUS_ERROR)
+ return -1;
+
+ return data_read_offset(dso, machine, offset, data, size);
+}
+
+/**
+ * dso__data_read_addr - Read data from dso address
+ * @dso: dso object
+ * @machine: machine object
+ * @add: virtual memory address
+ * @data: buffer to store data
+ * @size: size of the @data buffer
+ *
+ * External interface to read data from dso address.
+ */
+ssize_t dso__data_read_addr(struct dso *dso, struct map *map,
+ struct machine *machine, u64 addr,
+ u8 *data, ssize_t size)
+{
+ u64 offset = map->map_ip(map, addr);
+ return dso__data_read_offset(dso, machine, offset, data, size);
+}
+
+struct map *dso__new_map(const char *name)
+{
+ struct map *map = NULL;
+ struct dso *dso = dso__new(name);
+
+ if (dso) {
+ map = map__new2(0, dso);
+ dso__put(dso);
+ }
+
+ return map;
+}
+
+struct dso *machine__findnew_kernel(struct machine *machine, const char *name,
+ const char *short_name, int dso_type)
+{
+ /*
+ * The kernel dso could be created by build_id processing.
+ */
+ struct dso *dso = machine__findnew_dso(machine, name);
+
+ /*
+ * We need to run this in all cases, since during the build_id
+ * processing we had no idea this was the kernel dso.
+ */
+ if (dso != NULL) {
+ dso__set_short_name(dso, short_name, false);
+ dso->kernel = dso_type;
+ }
+
+ return dso;
+}
+
+void dso__set_long_name(struct dso *dso, const char *name, bool name_allocated)
+{
+ struct rb_root *root = dso->root;
+
+ if (name == NULL)
+ return;
+
+ if (dso->long_name_allocated)
+ free((char *)dso->long_name);
+
+ if (root) {
+ rb_erase(&dso->rb_node, root);
+ /*
+ * __dsos__findnew_link_by_longname() isn't guaranteed to add it
+ * back, so a clean removal is required here.
+ */
+ RB_CLEAR_NODE(&dso->rb_node);
+ dso->root = NULL;
+ }
+
+ dso->long_name = name;
+ dso->long_name_len = strlen(name);
+ dso->long_name_allocated = name_allocated;
+
+ if (root)
+ __dsos__findnew_link_by_longname(root, dso, NULL);
+}
+
+void dso__set_short_name(struct dso *dso, const char *name, bool name_allocated)
+{
+ if (name == NULL)
+ return;
+
+ if (dso->short_name_allocated)
+ free((char *)dso->short_name);
+
+ dso->short_name = name;
+ dso->short_name_len = strlen(name);
+ dso->short_name_allocated = name_allocated;
+}
+
+int dso__name_len(const struct dso *dso)
+{
+ if (!dso)
+ return strlen("[unknown]");
+ if (verbose > 0)
+ return dso->long_name_len;
+
+ return dso->short_name_len;
+}
+
+bool dso__loaded(const struct dso *dso)
+{
+ return dso->loaded;
+}
+
+bool dso__sorted_by_name(const struct dso *dso)
+{
+ return dso->sorted_by_name;
+}
+
+void dso__set_sorted_by_name(struct dso *dso)
+{
+ dso->sorted_by_name = true;
+}
+
+struct dso *dso__new(const char *name)
+{
+ struct dso *dso = calloc(1, sizeof(*dso) + strlen(name) + 1);
+
+ if (dso != NULL) {
+ strcpy(dso->name, name);
+ dso__set_long_name(dso, dso->name, false);
+ dso__set_short_name(dso, dso->name, false);
+ dso->symbols = dso->symbol_names = RB_ROOT_CACHED;
+ dso->data.cache = RB_ROOT;
+ dso->inlined_nodes = RB_ROOT_CACHED;
+ dso->srclines = RB_ROOT_CACHED;
+ dso->data.fd = -1;
+ dso->data.status = DSO_DATA_STATUS_UNKNOWN;
+ dso->symtab_type = DSO_BINARY_TYPE__NOT_FOUND;
+ dso->binary_type = DSO_BINARY_TYPE__NOT_FOUND;
+ dso->is_64_bit = (sizeof(void *) == 8);
+ dso->loaded = 0;
+ dso->rel = 0;
+ dso->sorted_by_name = 0;
+ dso->has_build_id = 0;
+ dso->has_srcline = 1;
+ dso->a2l_fails = 1;
+ dso->kernel = DSO_TYPE_USER;
+ dso->needs_swap = DSO_SWAP__UNSET;
+ dso->comp = COMP_ID__NONE;
+ RB_CLEAR_NODE(&dso->rb_node);
+ dso->root = NULL;
+ INIT_LIST_HEAD(&dso->node);
+ INIT_LIST_HEAD(&dso->data.open_entry);
+ pthread_mutex_init(&dso->lock, NULL);
+ refcount_set(&dso->refcnt, 1);
+ }
+
+ return dso;
+}
+
+void dso__delete(struct dso *dso)
+{
+ if (!RB_EMPTY_NODE(&dso->rb_node))
+ pr_err("DSO %s is still in rbtree when being deleted!\n",
+ dso->long_name);
+
+ /* free inlines first, as they reference symbols */
+ inlines__tree_delete(&dso->inlined_nodes);
+ srcline__tree_delete(&dso->srclines);
+ symbols__delete(&dso->symbols);
+
+ if (dso->short_name_allocated) {
+ zfree((char **)&dso->short_name);
+ dso->short_name_allocated = false;
+ }
+
+ if (dso->long_name_allocated) {
+ zfree((char **)&dso->long_name);
+ dso->long_name_allocated = false;
+ }
+
+ dso__data_close(dso);
+ auxtrace_cache__free(dso->auxtrace_cache);
+ dso_cache__free(dso);
+ dso__free_a2l(dso);
+ zfree(&dso->symsrc_filename);
+ nsinfo__zput(dso->nsinfo);
+ pthread_mutex_destroy(&dso->lock);
+ free(dso);
+}
+
+struct dso *dso__get(struct dso *dso)
+{
+ if (dso)
+ refcount_inc(&dso->refcnt);
+ return dso;
+}
+
+void dso__put(struct dso *dso)
+{
+ if (dso && refcount_dec_and_test(&dso->refcnt))
+ dso__delete(dso);
+}
+
+void dso__set_build_id(struct dso *dso, void *build_id)
+{
+ memcpy(dso->build_id, build_id, sizeof(dso->build_id));
+ dso->has_build_id = 1;
+}
+
+bool dso__build_id_equal(const struct dso *dso, u8 *build_id)
+{
+ return memcmp(dso->build_id, build_id, sizeof(dso->build_id)) == 0;
+}
+
+void dso__read_running_kernel_build_id(struct dso *dso, struct machine *machine)
+{
+ char path[PATH_MAX];
+
+ if (machine__is_default_guest(machine))
+ return;
+ sprintf(path, "%s/sys/kernel/notes", machine->root_dir);
+ if (sysfs__read_build_id(path, dso->build_id,
+ sizeof(dso->build_id)) == 0)
+ dso->has_build_id = true;
+}
+
+int dso__kernel_module_get_build_id(struct dso *dso,
+ const char *root_dir)
+{
+ char filename[PATH_MAX];
+ /*
+ * kernel module short names are of the form "[module]" and
+ * we need just "module" here.
+ */
+ const char *name = dso->short_name + 1;
+
+ snprintf(filename, sizeof(filename),
+ "%s/sys/module/%.*s/notes/.note.gnu.build-id",
+ root_dir, (int)strlen(name) - 1, name);
+
+ if (sysfs__read_build_id(filename, dso->build_id,
+ sizeof(dso->build_id)) == 0)
+ dso->has_build_id = true;
+
+ return 0;
+}
+
+size_t dso__fprintf_buildid(struct dso *dso, FILE *fp)
+{
+ char sbuild_id[SBUILD_ID_SIZE];
+
+ build_id__sprintf(dso->build_id, sizeof(dso->build_id), sbuild_id);
+ return fprintf(fp, "%s", sbuild_id);
+}
+
+size_t dso__fprintf(struct dso *dso, FILE *fp)
+{
+ struct rb_node *nd;
+ size_t ret = fprintf(fp, "dso: %s (", dso->short_name);
+
+ if (dso->short_name != dso->long_name)
+ ret += fprintf(fp, "%s, ", dso->long_name);
+ ret += fprintf(fp, "%sloaded, ", dso__loaded(dso) ? "" : "NOT ");
+ ret += dso__fprintf_buildid(dso, fp);
+ ret += fprintf(fp, ")\n");
+ for (nd = rb_first_cached(&dso->symbols); nd; nd = rb_next(nd)) {
+ struct symbol *pos = rb_entry(nd, struct symbol, rb_node);
+ ret += symbol__fprintf(pos, fp);
+ }
+
+ return ret;
+}
+
+enum dso_type dso__type(struct dso *dso, struct machine *machine)
+{
+ int fd;
+ enum dso_type type = DSO__TYPE_UNKNOWN;
+
+ fd = dso__data_get_fd(dso, machine);
+ if (fd >= 0) {
+ type = dso__type_fd(fd);
+ dso__data_put_fd(dso);
+ }
+
+ return type;
+}
+
+int dso__strerror_load(struct dso *dso, char *buf, size_t buflen)
+{
+ int idx, errnum = dso->load_errno;
+ /*
+ * This must have a same ordering as the enum dso_load_errno.
+ */
+ static const char *dso_load__error_str[] = {
+ "Internal tools/perf/ library error",
+ "Invalid ELF file",
+ "Can not read build id",
+ "Mismatching build id",
+ "Decompression failure",
+ };
+
+ BUG_ON(buflen == 0);
+
+ if (errnum >= 0) {
+ const char *err = str_error_r(errnum, buf, buflen);
+
+ if (err != buf)
+ scnprintf(buf, buflen, "%s", err);
+
+ return 0;
+ }
+
+ if (errnum < __DSO_LOAD_ERRNO__START || errnum >= __DSO_LOAD_ERRNO__END)
+ return -1;
+
+ idx = errnum - __DSO_LOAD_ERRNO__START;
+ scnprintf(buf, buflen, "%s", dso_load__error_str[idx]);
+ return 0;
+}