initial commit

2026-05-26 02:08:47 -05:00
commit aac5d72fe4
60 changed files with 12096 additions and 0 deletions
@@ -0,0 +1,34 @@
+diff --git a/absl/debugging/symbolize_elf.inc b/absl/debugging/symbolize_elf.inc
+index 0317bbc..e4a5060 100644
+--- a/absl/debugging/symbolize_elf.inc
+++ b/absl/debugging/symbolize_elf.inc
+@@ -1086,17 +1086,24 @@ static ABSL_ATTRIBUTE_NOINLINE bool ReadAddrMap(
+     void *arg, void *tmp_buf, size_t tmp_buf_size) {
+   // Use /proc/self/task/<pid>/maps instead of /proc/self/maps. The latter
+   // requires kernel to stop all threads, and is significantly slower when there
+-  // are 1000s of threads.
+  // are 1000s of threads. Some container procfs implementations do not expose
+  // per-thread maps files, so fall back to /proc/self/maps when needed.
+   char maps_path[80];
+   snprintf(maps_path, sizeof(maps_path), "/proc/self/task/%d/maps", getpid());
+ 
+   int maps_fd;
+   NO_INTR(maps_fd = OpenReadOnlyWithHighFD(maps_path));
+-  FileDescriptor wrapped_maps_fd(maps_fd);
+-  if (wrapped_maps_fd.get() < 0) {
+-    ABSL_RAW_LOG(WARNING, "%s: errno=%d", maps_path, errno);
+-    return false;
+  if (maps_fd < 0) {
+    const int task_maps_errno = errno;
+    NO_INTR(maps_fd = OpenReadOnlyWithHighFD("/proc/self/maps"));
+    if (maps_fd < 0) {
+      const int self_maps_errno = errno;
+      ABSL_RAW_LOG(WARNING, "%s: errno=%d; /proc/self/maps: errno=%d",
+                   maps_path, task_maps_errno, self_maps_errno);
+      return false;
+    }
+   }
+  FileDescriptor wrapped_maps_fd(maps_fd);
+ 
+   // Iterate over maps and look for the map containing the pc.  Then
+   // look into the symbol tables inside.