[debug-use-only] Build debug binaries

.github/workflows/test_suite_linux.yml

@@ -65,7 +65,7 @@ jobs:
         export JAVA_HOME=/usr/lib/jvm/java-${{ matrix.JAVA_VERSION }}-openjdk-amd64
         export PATH=$JAVA_HOME/bin:$PATH
         export LIBGL_ALWAYS_SOFTWARE=true
-        xvfb-run --auto-servernum make distrib -j4
+        xvfb-run --auto-servernum make debug -j4
     - name: Create/Update GitHub release
       if: ${{ matrix.os == 'ubuntu-22.04' && (github.event_name == 'push' || github.event_name == 'schedule') }}
       run: |

.github/workflows/test_suite_mac.yml

@@ -53,7 +53,7 @@ jobs:
       run: |
         export JAVA_HOME="$(/usr/libexec/java_home -v 16)"
         export PATH=/Library/Frameworks/Python.framework/Versions/3.11/bin:/usr/local/bin/:$PATH
-        make distrib -j4
+        make debug -j4
     - name: Create/Update GitHub release
       if: ${{ (github.event_name == 'push' || github.event_name == 'schedule') }}
       run: |

.github/workflows/test_suite_windows.yml

@@ -78,7 +78,7 @@ jobs:
     - name: Webots Package Creation
       run: |
         export WEBOTS_HOME=$GITHUB_WORKSPACE
-        make distrib -j4
+        make debug -j4
     - name: Create/Update GitHub release
       if: ${{ (github.event_name == 'push' || github.event_name == 'schedule') }}
       run: |

docs/reference/changelog-r2025.md

@@ -6,6 +6,7 @@
     - Added implementations of `wbu_system_tmpdir` and `wbu_system_webots_instance_path` to the MATLAB API ([#6756](https://github.com/cyberbotics/webots/pull/6756)).
     - Added missing import libraries on Windows ([#6753](https://github.com/cyberbotics/webots/pull/6753)).
     - Added some missing function definitions to the existing Windows libraries ([#6753](https://github.com/cyberbotics/webots/pull/6753)).
+    - Webots now prints the cause when it fails to create a memory-mapped file for a camera node ([#6896](https://github.com/cyberbotics/webots/pull/6896)).
   - Cleanup
     - **Removed `libController.a` and `libCppController.a` libraries on Windows. Please use `Controller.lib` and `CppController.lib` instead ([#6753](https://github.com/cyberbotics/webots/pull/6753)).**
   - Bug Fixes

src/webots/core/WbPosixMemoryMappedFile.cpp

@@ -14,7 +14,9 @@
 
 #include "WbPosixMemoryMappedFile.hpp"
 
+#include <errno.h>
 #include <fcntl.h>
+#include <string.h>
 #include <sys/mman.h>
 #include <unistd.h>
 
@@ -30,14 +32,20 @@ WbPosixMemoryMappedFile::~WbPosixMemoryMappedFile() {
 bool WbPosixMemoryMappedFile::create(int size) {
   unlink(mName.toUtf8());                                 // delete a possibly existing memory mapped file with the same name
   int fd = open(mName.toUtf8(), O_CREAT | O_RDWR, 0666);  // returns -1 in case of failure
-  if (fd < 0)
+  if (fd < 0) {
+    mErrorString = QString("Cannot open file: %1 (%2)").arg(mName).arg(strerror(errno));
     return false;
-  if (ftruncate(fd, size) == -1)
+  }
+  if (ftruncate(fd, size) == -1) {
+    mErrorString = QString("Cannot truncate file: %1 (%2)").arg(mName).arg(strerror(errno));
     return false;
+  }
   mData = mmap(0, size, PROT_WRITE | PROT_READ, MAP_SHARED, fd, 0);
   close(fd);
-  if (mData == MAP_FAILED)
+  if (mData == MAP_FAILED) {
+    mErrorString = QString("Cannot map file: %1 (%2)").arg(mName).arg(strerror(errno));
     return false;
+  }
   mSize = size;
   return true;
 }

src/webots/core/WbPosixMemoryMappedFile.hpp

@@ -27,11 +27,13 @@ class WbPosixMemoryMappedFile {
   int size() const { return mSize; }
   void *data() const { return mData; }
   const QString &nativeKey() const { return mName; }
+  const QString &errorString() const { return mErrorString; }
 
 private:
   QString mName;
   int mSize;
   void *mData;
+  QString mErrorString;
 };
 
 #endif

src/webots/nodes/WbAbstractCamera.cpp

@@ -204,7 +204,8 @@ WbMemoryMappedFile *WbAbstractCamera::initializeMemoryMappedFile(const QString &
   if (imageMemoryMappedFile->attach())
     imageMemoryMappedFile->detach();
   if (!imageMemoryMappedFile->create(size())) {
-    const QString message = tr("Cannot allocate memory mapped file for camera image.");
+    const QString message =
+      tr("Cannot allocate memory mapped file for camera image.\nCaused by: %1.").arg(imageMemoryMappedFile->errorString());
     warn(message);
     delete imageMemoryMappedFile;
     return NULL;