[tsan] Fix ASLR edge case, and improve diagnostics (#97125)

In extremely rare cases (estimated 1 in 3 million), minor allocations
that happen after the memory layout was checked in
InitializePlatformEarly() [1] may result in the memory layout
unexpectedly being incompatible in InitializePlatform(). We fix this by
adding another memory layout check (and opportunity to re-exec without
ASLR) in InitializePlatform().

To improve future debuggability, this patch also dumps the process map
if the memory layout is unexpectedly incompatible.

[1]
```
 __sanitizer::InitializePlatformEarly();
  __tsan::InitializePlatformEarly();

#if !SANITIZER_GO
  InitializeAllocator(); // <-- ~8MB mmap'ed
  ReplaceSystemMalloc();
#endif
  if (common_flags()->detect_deadlocks)
    ctx->dd = DDetector::Create(flags()); // <-- ~4MB mmap'ed
  Processor *proc = ProcCreate(); // <-- ~1MB mmap'ed
  ProcWire(proc, thr);
  InitializeInterceptors(); <-- ~3MB mmap'ed
  InitializePlatform();
```

0 files changed, 0 insertions, 0 deletions