#include <sys/types.h>
#include <sys/stat.h>
-#include <sys/stat.h>
#include <unistd.h>
#include <limits.h>
#include <stdlib.h>
#include <stdio.h>
#include "usterr.h"
+#include "lttng-ust-baddr.h"
+
#define TRACEPOINT_DEFINE
-#include "ust_baddr.h"
+#include "ust_baddr_statedump.h"
-int
-lttng_ust_push_baddr(void *so_base, const char *so_name)
+static int
+extract_soinfo_events(struct dl_phdr_info *info, size_t size, void *data)
{
- char resolved_path[PATH_MAX];
- struct stat sostat;
+ int j;
+ int num_loadable_segment = 0;
- if (!realpath(so_name, resolved_path)) {
- ERR("could not resolve path '%s'", so_name);
- return 0;
- }
+ for (j = 0; j < info->dlpi_phnum; j++) {
+ char resolved_path[PATH_MAX];
+ struct stat sostat;
+ void *base_addr_ptr;
- if (stat(resolved_path, &sostat)) {
- ERR("could not access file status for %s", resolved_path);
- return 0;
- }
+ if (info->dlpi_phdr[j].p_type != PT_LOAD)
+ continue;
- tracepoint(ust_baddr, push,
- so_base, resolved_path, sostat.st_size, sostat.st_mtime);
+ /* Calculate virtual memory address of the loadable segment */
+ base_addr_ptr = (void *) info->dlpi_addr
+ + info->dlpi_phdr[j].p_vaddr;
+
+ num_loadable_segment += 1;
+ if ((info->dlpi_name == NULL || info->dlpi_name[0] == 0)
+ && num_loadable_segment == 1) {
+ /*
+ * If the iterated element is the executable itself we
+ * have to use Dl_info to determine its full path
+ */
+ Dl_info dl_info = { 0 };
+ if (!dladdr(base_addr_ptr, &dl_info))
+ return 0;
+ if (!realpath(dl_info.dli_fname, resolved_path))
+ return 0;
+ } else {
+ /*
+ * For regular dl_phdr_info entries we have to check if
+ * the path to the shared object really exists
+ */
+ if (!realpath(info->dlpi_name, resolved_path)) {
+ /* Found vDSO, put the 'path' into brackets */
+ snprintf(resolved_path, PATH_MAX - 1, "[%s]",
+ info->dlpi_name);
+ }
+ }
+
+ if (stat(resolved_path, &sostat)) {
+ sostat.st_size = 0;
+ sostat.st_mtime = -1;
+ }
+
+ tracepoint(ust_baddr_statedump, soinfo,
+ (struct lttng_session *) data, base_addr_ptr,
+ resolved_path, sostat.st_size, sostat.st_mtime);
+
+ /*
+ * We are only interested in the base address (lowest virtual
+ * address associated with the memory image), skip the rest
+ */
+ break;
+ }
return 0;
}
int
-lttng_ust_pop_baddr(void *so_base)
+lttng_ust_baddr_statedump(struct lttng_session *session)
{
- tracepoint(ust_baddr, pop, so_base);
+ /*
+ * Iterate through the list of currently loaded shared objects and
+ * generate events for loadable segments using extract_soinfo_events
+ */
+ dl_iterate_phdr(extract_soinfo_events, session);
return 0;
}