/*
* 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, bool alloc_ext)
{
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, "[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;
}
if (is_supported_compression(ext + 1)) {
m->comp = true;
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;
}
strxfrchar(m->name, '-', '_');
}
if (alloc_ext && m->comp) {
m->ext = strdup(ext + 4);
if (!m->ext) {
free((void *) m->name);
return -ENOMEM;
}
}
return 0;
}
int event__process_mmap(event_t *self, struct perf_session *session)
{
struct thread *thread;
struct map *map;
dump_printf(" %d/%d: [%#Lx(%#Lx) @ %#Lx]: %s\n",
self->mmap.pid, self->mmap.tid, self->mmap.start,
self->mmap.len, self->mmap.pgoff, self->mmap.filename);
if (self->mmap.pid == 0) {
static const char kmmap_prefix[] = "[kernel.kallsyms.";
if (self->mmap.filename[0] == '/') {
char short_module_name[1024];
char *name = strrchr(self->mmap.filename, '/'), *dot;
if (name == NULL)
goto out_problem;
++name; /* skip / */
dot = strrchr(name, '.');
if (dot == NULL)
goto out_problem;
snprintf(short_module_name, sizeof(short_module_name),
"[%.*s]", (int)(dot - name), name);
strxfrchar(short_module_name, '-', '_');
map = perf_session__new_module_map(session,
self->mmap.start,
self->mmap.filename);
if (map == NULL)
goto out_problem;
name = strdup(short_module_name);
if (name == NULL)
goto out_problem;
map->dso->short_name = name;
map->end = map->start + self->mmap.len;
} else if (memcmp(self->mmap.filename, kmmap_prefix,
sizeof(kmmap_prefix) - 1) == 0) {
const char *symbol_name = (self->mmap.filename +
sizeof(kmmap_prefix) - 1);
/*
* Should be there already, from the build-id table in
* the header.
*/
struct dso *kernel = __dsos__findnew(&dsos__kernel,
"[kernel.kallsyms]");
if (kernel == NULL)
goto out_problem;
kernel->kernel = 1;
if (__perf_session__create_kernel_maps(session, kernel) < 0)
goto out_problem;
session->vmlinux_maps[MAP__FUNCTION]->start = self->mmap.start;
session->vmlinux_maps[MAP__FUNCTION]->end = self->mmap.start + self->mmap.len;
/*
* Be a bit paranoid here, some perf.data file came with
* a zero sized synthesized MMAP event for the kernel.
*/
if (session->vmlinux_maps[MAP__FUNCTION]->end == 0)
session->vmlinux_maps[MAP__FUNCTION]->end = ~0UL;
perf_session__set_kallsyms_ref_reloc_sym(session, symbol_name,
self->mmap.pgoff);
}
return 0;
}
thread = perf_session__findnew(session, self->mmap.pid);
map = map__new(&self->mmap, MAP__FUNCTION,
session->cwd, session->cwdlen);
if (thread == NULL || map == NULL)
goto out_problem;
thread__insert_map(thread, map);
return 0;
out_problem:
dump_printf("problem processing PERF_RECORD_MMAP, skipping event.\n");
return 0;
}
HRESULT CaPerfDataWriter::setModulesAbsolutePath(const std::string& dirName)
{
struct dirent* dent;
const char* dirPath = dirName.c_str();
DIR* dir = opendir(dirPath);
HRESULT ret = S_OK;
if (!dir)
{
OS_OUTPUT_FORMAT_DEBUG_LOG(OS_DEBUG_LOG_ERROR, L"cannot open %hs dir", dirPath);
return E_FAIL;
}
while ((dent = readdir(dir)) != NULL)
{
char path[OS_MAX_PATH];
struct stat st;
/*sshfs might return bad dent->d_type, so we have to stat*/
sprintf(path, "%s/%s", dirPath, dent->d_name);
if (stat(path, &st))
{
continue;
}
if (S_ISDIR(st.st_mode))
{
if (!strcmp(dent->d_name, ".") || !strcmp(dent->d_name, ".."))
{
continue;
}
snprintf(path, sizeof(path), "%s/%s",
dirPath, dent->d_name);
ret = setModulesAbsolutePath(path);
if (ret < 0)
{
break;
}
}
else
{
char* dot = strrchr(dent->d_name, '.');
char dso_name[OS_MAX_PATH];
if (dot == NULL || strcmp(dot, ".ko"))
{
continue;
}
snprintf(dso_name, sizeof(dso_name), "[%.*s]", (int)(dot - dent->d_name), dent->d_name);
strxfrchar(dso_name, '-', '_');
// map = map_groups__find_by_name(self, MAP__FUNCTION, dso_name);
// if (map == NULL)
// continue;
kModuleNameMap::iterator it = m_kModuleNameMap.find(dso_name);
if (it == m_kModuleNameMap.end())
{
continue;
}
snprintf(path, sizeof(path), "%s/%s", dirPath, dent->d_name);
it->second.addAbsPath(path);
#if 0
long_name = strdup(path);
if (long_name == NULL)
{
ret = -1;
}
else
{
dso__set_long_name(map->dso, long_name);
map->dso->lname_alloc = 1;
dso__kernel_module_get_build_id(map->dso, "");
}
#endif // 0
}
}
// we are done dir
closedir(dir);
return ret;
}
static int event__process_kernel_mmap(event_t *self,
struct perf_session *session)
{
struct map *map;
char kmmap_prefix[PATH_MAX];
struct machine *machine;
enum dso_kernel_type kernel_type;
bool is_kernel_mmap;
machine = perf_session__findnew_machine(session, self->mmap.pid);
if (!machine) {
pr_err("Can't find id %d's machine\n", self->mmap.pid);
goto out_problem;
}
machine__mmap_name(machine, kmmap_prefix, sizeof(kmmap_prefix));
if (machine__is_host(machine))
kernel_type = DSO_TYPE_KERNEL;
else
kernel_type = DSO_TYPE_GUEST_KERNEL;
is_kernel_mmap = memcmp(self->mmap.filename,
kmmap_prefix,
strlen(kmmap_prefix)) == 0;
if (self->mmap.filename[0] == '/' ||
(!is_kernel_mmap && self->mmap.filename[0] == '[')) {
char short_module_name[1024];
char *name, *dot;
if (self->mmap.filename[0] == '/') {
name = strrchr(self->mmap.filename, '/');
if (name == NULL)
goto out_problem;
++name; /* skip / */
dot = strrchr(name, '.');
if (dot == NULL)
goto out_problem;
snprintf(short_module_name, sizeof(short_module_name),
"[%.*s]", (int)(dot - name), name);
strxfrchar(short_module_name, '-', '_');
} else
strcpy(short_module_name, self->mmap.filename);
map = machine__new_module(machine, self->mmap.start,
self->mmap.filename);
if (map == NULL)
goto out_problem;
name = strdup(short_module_name);
if (name == NULL)
goto out_problem;
map->dso->short_name = name;
map->end = map->start + self->mmap.len;
} else if (is_kernel_mmap) {
const char *symbol_name = (self->mmap.filename +
strlen(kmmap_prefix));
/*
* Should be there already, from the build-id table in
* the header.
*/
struct dso *kernel = __dsos__findnew(&machine->kernel_dsos,
kmmap_prefix);
if (kernel == NULL)
goto out_problem;
kernel->kernel = kernel_type;
if (__machine__create_kernel_maps(machine, kernel) < 0)
goto out_problem;
event_set_kernel_mmap_len(machine->vmlinux_maps, self);
perf_session__set_kallsyms_ref_reloc_sym(machine->vmlinux_maps,
symbol_name,
self->mmap.pgoff);
if (machine__is_default_guest(machine)) {
/*
* preload dso of guest kernel and modules
*/
dso__load(kernel, machine->vmlinux_maps[MAP__FUNCTION],
NULL);
}
}
return 0;
out_problem:
return -1;
}