qemu maps debug print

1 files changed, 18 insertions, 0 deletions

diff --git a/qemu_mode/patches/afl-qemu-cpu-inl.h b/qemu_mode/patches/afl-qemu-cpu-inl.h
index 8660ba23..cda980e0 100644
--- a/qemu_mode/patches/afl-qemu-cpu-inl.h
+++ b/qemu_mode/patches/afl-qemu-cpu-inl.h
@@ -231,6 +231,21 @@ static void afl_setup(void) {
 
 }
 
+
+static void print_mappings(void) {
+
+  u8    buf[MAX_LINE];
+  FILE* f = fopen("/proc/self/maps", "r");
+
+  if (!f) return;
+
+  while (fgets(buf, MAX_LINE, f))
+    printf("%s", buf);
+
+  fclose(f);
+
+}
+
 /* Fork server logic, invoked once we hit _start. */
 
 static void afl_forkserver(CPUState *cpu) {
@@ -239,6 +254,9 @@ static void afl_forkserver(CPUState *cpu) {
 
   if (forkserver_installed == 1) return;
   forkserver_installed = 1;
+  
+  if (getenv("AFL_QEMU_DEBUG_MAPS"))
+    print_mappings();
 
   // if (!afl_area_ptr) return; // not necessary because of fixed dummy buffer