[compiler-rt] [Sanitizers][Darwin] Correct iterating of MachO load commands (PR #130161)

[Mariusz Borsa via llvm-commits]

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@@ -334,9 +334,22 @@ static const load_command *NextCommand(const load_command *lc) {
   return (const load_command *)((const char *)lc + lc->cmdsize);
 }
 
-static void FindUUID(const load_command *first_lc, u8 *uuid_output) {
-  for (const load_command *lc = first_lc; lc->cmd != 0; lc = NextCommand(lc)) {
-    if (lc->cmd != LC_UUID) continue;
+#ifdef MH_MAGIC_64
+static const size_t header_size = sizeof(mach_header_64);
+#else
+static const size_t header_size = sizeof(mach_header);
+#endif
+
+static void FindUUID(const load_command *first_lc, const mach_header *hdr,
+                     u8 *uuid_output) {
+  unsigned short curcmd = 0;
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wrotki wrote:

Done. Went with uint32_t so it has same type as HDR->ncmds

https://github.com/llvm/llvm-project/pull/130161