Segmentation fault since migration to JUCE v5

mderie · September 10, 2017, 3:39pm

Hi experts,

I got some troubles, I can’t run any of my previous in-house projects since the v5 upgrade.
It creates each time a segmentation fault at the following instruction :

juce::StringArray result = juce::MidiInput::getDevices();

I can’t understand why Juce Demos are working fine… I run a debian 8
Here’s the gdb bt output (though not very insightfull) :

Core was generated by `./usynth’.
Program terminated with signal SIGSEGV, Segmentation fault.
#0 0x0000000000465d7b in ?? ()
(gdb) bt
#0 0x0000000000465d7b in ?? ()
#1 0x00007ffc38343b40 in ?? ()
#2 0x00000000020ae1b0 in ?? ()
#3 0x0000000000000000 in ?? ()
(gdb)

Any help very much appreciate

t0m · September 11, 2017, 7:54am

Can you create a very basic app which crashes in the same way? I’m afraid that without more information we’re not going to be able to help very much.

jimc · September 11, 2017, 9:14am

Zeros are never good

jimc · September 11, 2017, 9:15am

Is that the WHOLE backtrace?

If so, maybe you’ve overwritten your stack…

Are you on linux?

mderie · September 11, 2017, 5:15pm

Full code sample :

#include “…/JuceLibraryCode/JuceHeader.h”
#include

int main (int argc, char* argv[])
{
std::cout << “Starting” << std::endl;
juce::StringArray devices = juce::MidiInput::getDevices(); // Explode here !
std::cout << “Still alive ?” << std::endl;

for (auto item : devices)
{
std::cout << "Found device = " << item << std::endl;
}

return 0;
}

Linux make file :

Automatically generated makefile, created by the Projucer

Don’t edit this file! Your changes will be overwritten when you re-save the Projucer project!

build with “V=1” for verbose builds

ifeq ($(V), 1)
V_AT =
else
V_AT = @
endif

(this disables dependency generation if multiple architectures are set)

DEPFLAGS := (if (word 2, $(TARGET_ARCH)), , -MMD)

ifndef STRIP
STRIP=strip
endif

ifndef AR
AR=ar
endif

ifndef CONFIG
CONFIG=Debug
endif

ifeq ($(CONFIG),Debug)
JUCE_BINDIR := build
JUCE_LIBDIR := build
JUCE_OBJDIR := build/intermediate/Debug
JUCE_OUTDIR := build

ifeq ($(TARGET_ARCH),)
TARGET_ARCH := -march=native
endif

JUCE_CPPFLAGS := (DEPFLAGS) -DLINUX=1 -DDEBUG=1 -D_DEBUG=1 -DJUCER_LINUX_MAKE_6D53C8B4=1 -DJUCE_APP_VERSION=1.0.0 -DJUCE_APP_VERSION_HEX=0x10000 (shell pkg-config --cflags alsa freetype2 libcurl x11 xext xinerama webkit2gtk-4.0 gtk±x11-3.0) -pthread -I…/…/JuceLibraryCode -I/home/sam/library/JUCE/modules $(CPPFLAGS)
JUCE_CPPFLAGS_CONSOLEAPP := -DJucePlugin_Build_VST=0 -DJucePlugin_Build_VST3=0 -DJucePlugin_Build_AU=0 -DJucePlugin_Build_AUv3=0 -DJucePlugin_Build_RTAS=0 -DJucePlugin_Build_AAX=0 -DJucePlugin_Build_Standalone=0
JUCE_TARGET_CONSOLEAPP := Juce5POC

JUCE_CFLAGS += (JUCE_CPPFLAGS) (TARGET_ARCH) -g -ggdb -O0 (CFLAGS) JUCE_CXXFLAGS += (CXXFLAGS) (JUCE_CFLAGS) -std=c++11 (CXXFLAGS)
JUCE_LDFLAGS += (TARGET_ARCH) -L(JUCE_BINDIR) -L$(JUCE_LIBDIR) (shell pkg-config --libs alsa freetype2 libcurl x11 xext xinerama webkit2gtk-4.0 gtk+-x11-3.0) -lGL -ldl -lpthread -lrt (LDFLAGS)

CLEANCMD = rm -rf (JUCE_OUTDIR)/(TARGET) $(JUCE_OBJDIR)
endif

ifeq ($(CONFIG),Release)
JUCE_BINDIR := build
JUCE_LIBDIR := build
JUCE_OBJDIR := build/intermediate/Release
JUCE_OUTDIR := build

ifeq ($(TARGET_ARCH),)
TARGET_ARCH := -march=native
endif

JUCE_CPPFLAGS := (DEPFLAGS) -DLINUX=1 -DNDEBUG=1 -DJUCER_LINUX_MAKE_6D53C8B4=1 -DJUCE_APP_VERSION=1.0.0 -DJUCE_APP_VERSION_HEX=0x10000 (shell pkg-config --cflags alsa freetype2 libcurl x11 xext xinerama webkit2gtk-4.0 gtk±x11-3.0) -pthread -I…/…/JuceLibraryCode -I/home/sam/library/JUCE/modules $(CPPFLAGS)
JUCE_CPPFLAGS_CONSOLEAPP := -DJucePlugin_Build_VST=0 -DJucePlugin_Build_VST3=0 -DJucePlugin_Build_AU=0 -DJucePlugin_Build_AUv3=0 -DJucePlugin_Build_RTAS=0 -DJucePlugin_Build_AAX=0 -DJucePlugin_Build_Standalone=0
JUCE_TARGET_CONSOLEAPP := Juce5POC

JUCE_CFLAGS += (JUCE_CPPFLAGS) (TARGET_ARCH) -O3 (CFLAGS) JUCE_CXXFLAGS += (CXXFLAGS) (JUCE_CFLAGS) -std=c++11 (CXXFLAGS)
JUCE_LDFLAGS += (TARGET_ARCH) -L(JUCE_BINDIR) -L$(JUCE_LIBDIR) -fvisibility=hidden (shell pkg-config --libs alsa freetype2 libcurl x11 xext xinerama webkit2gtk-4.0 gtk+-x11-3.0) -lGL -ldl -lpthread -lrt (LDFLAGS)

CLEANCMD = rm -rf (JUCE_OUTDIR)/(TARGET) $(JUCE_OBJDIR)
endif

OBJECTS_CONSOLEAPP :=
(JUCE_OBJDIR)/Main_90ebc5c2.o \ (JUCE_OBJDIR)/include_juce_audio_basics_8a4e984a.o
(JUCE_OBJDIR)/include_juce_audio_devices_63111d02.o \ (JUCE_OBJDIR)/include_juce_audio_formats_15f82001.o
(JUCE_OBJDIR)/include_juce_audio_processors_10c03666.o \ (JUCE_OBJDIR)/include_juce_core_f26d17db.o
(JUCE_OBJDIR)/include_juce_cryptography_8cb807a8.o \ (JUCE_OBJDIR)/include_juce_data_structures_7471b1e3.o
(JUCE_OBJDIR)/include_juce_events_fd7d695.o \ (JUCE_OBJDIR)/include_juce_graphics_f817e147.o
(JUCE_OBJDIR)/include_juce_gui_basics_e3f79785.o \ (JUCE_OBJDIR)/include_juce_gui_extra_6dee1c1a.o
(JUCE_OBJDIR)/include_juce_opengl_a8a032b.o \ (JUCE_OBJDIR)/include_juce_video_be78589.o \

.PHONY: clean all

all : (JUCE_OUTDIR)/(JUCE_TARGET_CONSOLEAPP)

(JUCE_OUTDIR)/(JUCE_TARGET_CONSOLEAPP) : check-pkg-config (OBJECTS_CONSOLEAPP) (RESOURCES)
@echo Linking “Juce5POC - ConsoleApp”
-(V_AT)mkdir -p (JUCE_BINDIR)
-(V_AT)mkdir -p (JUCE_LIBDIR)
-(V_AT)mkdir -p (JUCE_OUTDIR)
(V_AT)(CXX) -o (JUCE_OUTDIR)/(JUCE_TARGET_CONSOLEAPP) (OBJECTS_CONSOLEAPP) (JUCE_LDFLAGS) (RESOURCES) (TARGET_ARCH)

(JUCE_OBJDIR)/Main_90ebc5c2.o: ../../Source/Main.cpp -(V_AT)mkdir -p (JUCE_OBJDIR) @echo "Compiling Main.cpp" (V_AT)(CXX) (JUCE_CXXFLAGS) (JUCE_CPPFLAGS_CONSOLEAPP) (JUCE_CFLAGS_CONSOLEAPP) -o “@" -c "<”

(JUCE_OBJDIR)/include_juce_audio_basics_8a4e984a.o: ../../JuceLibraryCode/include_juce_audio_basics.cpp -(V_AT)mkdir -p (JUCE_OBJDIR) @echo "Compiling include_juce_audio_basics.cpp" (V_AT)(CXX) (JUCE_CXXFLAGS) (JUCE_CPPFLAGS_CONSOLEAPP) (JUCE_CFLAGS_CONSOLEAPP) -o “@" -c "<”

(JUCE_OBJDIR)/include_juce_audio_devices_63111d02.o: ../../JuceLibraryCode/include_juce_audio_devices.cpp -(V_AT)mkdir -p (JUCE_OBJDIR) @echo "Compiling include_juce_audio_devices.cpp" (V_AT)(CXX) (JUCE_CXXFLAGS) (JUCE_CPPFLAGS_CONSOLEAPP) (JUCE_CFLAGS_CONSOLEAPP) -o “@" -c "<”

(JUCE_OBJDIR)/include_juce_audio_formats_15f82001.o: ../../JuceLibraryCode/include_juce_audio_formats.cpp -(V_AT)mkdir -p (JUCE_OBJDIR) @echo "Compiling include_juce_audio_formats.cpp" (V_AT)(CXX) (JUCE_CXXFLAGS) (JUCE_CPPFLAGS_CONSOLEAPP) (JUCE_CFLAGS_CONSOLEAPP) -o “@" -c "<”

(JUCE_OBJDIR)/include_juce_audio_processors_10c03666.o: ../../JuceLibraryCode/include_juce_audio_processors.cpp -(V_AT)mkdir -p (JUCE_OBJDIR) @echo "Compiling include_juce_audio_processors.cpp" (V_AT)(CXX) (JUCE_CXXFLAGS) (JUCE_CPPFLAGS_CONSOLEAPP) (JUCE_CFLAGS_CONSOLEAPP) -o “@" -c "<”

(JUCE_OBJDIR)/include_juce_core_f26d17db.o: ../../JuceLibraryCode/include_juce_core.cpp -(V_AT)mkdir -p (JUCE_OBJDIR) @echo "Compiling include_juce_core.cpp" (V_AT)(CXX) (JUCE_CXXFLAGS) (JUCE_CPPFLAGS_CONSOLEAPP) (JUCE_CFLAGS_CONSOLEAPP) -o “@" -c "<”

(JUCE_OBJDIR)/include_juce_cryptography_8cb807a8.o: ../../JuceLibraryCode/include_juce_cryptography.cpp -(V_AT)mkdir -p (JUCE_OBJDIR) @echo "Compiling include_juce_cryptography.cpp" (V_AT)(CXX) (JUCE_CXXFLAGS) (JUCE_CPPFLAGS_CONSOLEAPP) (JUCE_CFLAGS_CONSOLEAPP) -o “@" -c "<”

(JUCE_OBJDIR)/include_juce_data_structures_7471b1e3.o: ../../JuceLibraryCode/include_juce_data_structures.cpp -(V_AT)mkdir -p (JUCE_OBJDIR) @echo "Compiling include_juce_data_structures.cpp" (V_AT)(CXX) (JUCE_CXXFLAGS) (JUCE_CPPFLAGS_CONSOLEAPP) (JUCE_CFLAGS_CONSOLEAPP) -o “@" -c "<”

(JUCE_OBJDIR)/include_juce_events_fd7d695.o: ../../JuceLibraryCode/include_juce_events.cpp -(V_AT)mkdir -p (JUCE_OBJDIR) @echo "Compiling include_juce_events.cpp" (V_AT)(CXX) (JUCE_CXXFLAGS) (JUCE_CPPFLAGS_CONSOLEAPP) (JUCE_CFLAGS_CONSOLEAPP) -o “@" -c "<”

(JUCE_OBJDIR)/include_juce_graphics_f817e147.o: ../../JuceLibraryCode/include_juce_graphics.cpp -(V_AT)mkdir -p (JUCE_OBJDIR) @echo "Compiling include_juce_graphics.cpp" (V_AT)(CXX) (JUCE_CXXFLAGS) (JUCE_CPPFLAGS_CONSOLEAPP) (JUCE_CFLAGS_CONSOLEAPP) -o “@" -c "<”

(JUCE_OBJDIR)/include_juce_gui_basics_e3f79785.o: ../../JuceLibraryCode/include_juce_gui_basics.cpp -(V_AT)mkdir -p (JUCE_OBJDIR) @echo "Compiling include_juce_gui_basics.cpp" (V_AT)(CXX) (JUCE_CXXFLAGS) (JUCE_CPPFLAGS_CONSOLEAPP) (JUCE_CFLAGS_CONSOLEAPP) -o “@" -c "<”

(JUCE_OBJDIR)/include_juce_gui_extra_6dee1c1a.o: ../../JuceLibraryCode/include_juce_gui_extra.cpp -(V_AT)mkdir -p (JUCE_OBJDIR) @echo "Compiling include_juce_gui_extra.cpp" (V_AT)(CXX) (JUCE_CXXFLAGS) (JUCE_CPPFLAGS_CONSOLEAPP) (JUCE_CFLAGS_CONSOLEAPP) -o “@" -c "<”

(JUCE_OBJDIR)/include_juce_opengl_a8a032b.o: ../../JuceLibraryCode/include_juce_opengl.cpp -(V_AT)mkdir -p (JUCE_OBJDIR) @echo "Compiling include_juce_opengl.cpp" (V_AT)(CXX) (JUCE_CXXFLAGS) (JUCE_CPPFLAGS_CONSOLEAPP) (JUCE_CFLAGS_CONSOLEAPP) -o “@" -c "<”

(JUCE_OBJDIR)/include_juce_video_be78589.o: ../../JuceLibraryCode/include_juce_video.cpp -(V_AT)mkdir -p (JUCE_OBJDIR) @echo "Compiling include_juce_video.cpp" (V_AT)(CXX) (JUCE_CXXFLAGS) (JUCE_CPPFLAGS_CONSOLEAPP) (JUCE_CFLAGS_CONSOLEAPP) -o “@" -c "<”

check-pkg-config:
@command -v pkg-config >/dev/null 2>&1 || { echo >&2 “pkg-config not installed. Please, install it.”; exit 1; }
@pkg-config --print-errors alsa freetype2 libcurl x11 xext xinerama

clean:
@echo Cleaning Juce5POC
(V_AT)(CLEANCMD)

strip:
@echo Stripping Juce5POC
-(V_AT)(STRIP) --strip-unneeded (JUCE_OUTDIR)/(TARGET)

-include $(OBJECTS_CONSOLEAPP:%.o=%.d)

t0m · September 11, 2017, 6:00pm

If you indent all the lines of code by four spaces then it will get formatted automatically by this forum.

As it stands the Linux MIDI classes are expecting you to have set up an application via JUCEApplicationBase so that JUCE’s event loop is configured - which lets you do things like send and receive MIDI messages. If you look here

github.com

WeAreROLI/JUCE/blob/develop/modules/juce_audio_devices/native/juce_linux_Midi.cpp#L29




 ==============================================================================

*/



namespace juce

{



#if JUCE_ALSA



// You can define these strings in your app if you want to override the default names:

#ifndef JUCE_ALSA_MIDI_NAME

#define JUCE_ALSA_MIDI_NAME  JUCEApplicationBase::getInstance()->getApplicationName().toUTF8()

#endif



//==============================================================================

namespace

{



//==============================================================================

class AlsaClient : public ReferenceCountedObject

{

you can see that if JUCE_ALSA_MIDI_NAME is not defined then JUCE attempts to get your application name from JUCEApplicationBase, which is unlikely to be successful in your case.

Try adding

#define JUCE_ALSA_MIDI_NAME "YourAppName"

to the user code section of AppConfig.h.

mderie · September 11, 2017, 6:12pm

Thanks a lot for your answer but what if my application is console based ?

It worked like a charm with Juce 4.3

mderie · September 11, 2017, 6:22pm

YES !!! It works now I change the main.cpp instead of the AppConfig.h

==> Thanks a lot

AMHA : it is anyway a breaking change… Meaning not needed in Juce 4.3 (no offense).
I’m still very happy with the Juce library !-)

Topic		Replies	Views
Projucer Segfault, Ubuntu 19.10 + JUCE 5.4.6 Linux	0	628	February 5, 2020
New User a bit lost General JUCE discussion	12	879	August 4, 2010
Juce on amd64 X2 Linux	66	1925	May 12, 2017
[Solved] Introjucer Segfaults out-of-the-box Linux	7	1314	September 26, 2014
Exc_bad_access related to the juce_String.cpp file Getting Started	9	568	February 19, 2021

Segmentation fault since migration to JUCE v5

Automatically generated makefile, created by the Projucer

Don’t edit this file! Your changes will be overwritten when you re-save the Projucer project!

build with “V=1” for verbose builds

(this disables dependency generation if multiple architectures are set)

Purchase

Discover

Learn

Support

About

Events

Segmentation fault since migration to JUCE v5

Automatically generated makefile, created by the Projucer

Don’t edit this file! Your changes will be overwritten when you re-save the Projucer project!

build with “V=1” for verbose builds

(this disables dependency generation if multiple architectures are set)

Related topics

Purchase

Discover

Learn

Support

About

Events