[asan] better diagnostics for mmap failure
git-svn-id: https://llvm.org/svn/llvm-project/compiler-rt/trunk@161874 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/lib/asan/tests/asan_test.cc b/lib/asan/tests/asan_test.cc
index 994e78a..4fa0b39 100644
--- a/lib/asan/tests/asan_test.cc
+++ b/lib/asan/tests/asan_test.cc
@@ -1879,7 +1879,7 @@
char *x = (char*)malloc(kAllocSize);
memset(x, 0, kAllocSize);
total_size += kAllocSize;
- fprintf(stderr, "total: %ldM\n", (long)total_size >> 20);
+ fprintf(stderr, "total: %ldM %p\n", (long)total_size >> 20, x);
}
}
diff --git a/lib/sanitizer_common/sanitizer_posix.cc b/lib/sanitizer_common/sanitizer_posix.cc
index 4caee3b..1b52e15 100644
--- a/lib/sanitizer_common/sanitizer_posix.cc
+++ b/lib/sanitizer_common/sanitizer_posix.cc
@@ -17,10 +17,12 @@
#include "sanitizer_libc.h"
#include "sanitizer_procmaps.h"
+#include <errno.h>
#include <pthread.h>
#include <stdarg.h>
#include <stdio.h>
#include <stdlib.h>
+#include <string.h>
#include <sys/mman.h>
#include <sys/resource.h>
#include <sys/time.h>
@@ -45,8 +47,9 @@
PROT_READ | PROT_WRITE,
MAP_PRIVATE | MAP_ANON, -1, 0);
if (res == (void*)-1) {
- Report("ERROR: Failed to allocate 0x%zx (%zd) bytes of %s\n",
- size, size, mem_type);
+ Report("ERROR: Failed to allocate 0x%zx (%zd) bytes of %s: %s\n",
+ size, size, mem_type, strerror(errno));
+ DumpProcessMap();
CHECK("unable to mmap" && 0);
}
return res;
