AP_HAL_ESP32: ensure malloc is wrapped to zero memory

The relevant linker flag needed to be put in the CMake script.

Author: tpwrules

Tools/ardupilotwaf/boards.py

@@ -1390,6 +1390,7 @@ def configure_env(self, cfg, env):
         ]
 
         # wrap malloc to ensure memory is zeroed
+        # note that this also needs to be done in the CMakeLists.txt files
         env.LINKFLAGS += ['-Wl,--wrap,malloc']
 
         if cfg.options.force_32bit:

libraries/AP_HAL_ESP32/targets/esp32/esp-idf/CMakeLists.txt

@@ -121,6 +121,9 @@ target_link_libraries(${elf_file}
 # linker script generation, partition_table generation, etc.
 idf_build_executable(${elf_file})
 
+# wrap malloc to ensure memory is zeroed
+target_link_options(${elf_file} PRIVATE "-Wl,--wrap,malloc")
+
 set(CMAKE_EXPORT_COMPILE_COMMANDS 1)
 
 # Additional targets for measuring RAM use: size, size-components, size-files

libraries/AP_HAL_ESP32/targets/esp32s3/esp-idf/CMakeLists.txt

@@ -121,6 +121,9 @@ target_link_libraries(${elf_file}
 # linker script generation, partition_table generation, etc.
 idf_build_executable(${elf_file})
 
+# wrap malloc to ensure memory is zeroed
+target_link_options(${elf_file} PRIVATE "-Wl,--wrap,malloc")
+
 set(CMAKE_EXPORT_COMPILE_COMMANDS 1)
 
 # Additional targets for measuring RAM use: size, size-components, size-files