Embedded TCC code no longer brings down the entire IDE on a sigsegv!

CMakeLists.txt

@@ -76,6 +76,7 @@ add_custom_target(GENERATE_UI_HEADERS
 		${CMAKE_SOURCE_DIR}/thirdparty-installed/lib/libz.a
 		${CMAKE_SOURCE_DIR}/thirdparty-installed/lib/libtcc.a
 		${CMAKE_SOURCE_DIR}/thirdparty-installed/lib/tcc/libtcc1.a
+		${CMAKE_SOURCE_DIR}/thirdparty-installed/lib/libsigsegv.a
 )
 add_dependencies(${CMAKE_PROJECT_NAME} GENERATE_UI_HEADERS)
 
@@ -122,6 +123,7 @@ target_link_libraries(${CMAKE_PROJECT_NAME}
 	${CMAKE_SOURCE_DIR}/thirdparty-installed/lib/libz.a
 	${CMAKE_SOURCE_DIR}/thirdparty-installed/lib/libtcc.a
 	${CMAKE_SOURCE_DIR}/thirdparty-installed/lib/tcc/libtcc1.a
+	${CMAKE_SOURCE_DIR}/thirdparty-installed/lib/libsigsegv.a
 	${GTK3_LIBRARIES}
 	-ldl
 	-pthread

embedded/recipe.h

@@ -24,11 +24,30 @@
 
 
 #include <tcclib.h>
+#include <float.h>
+#include <stdalign.h>
+#include <stdatomic.h>
+#include <stdbool.h>
+#include <stdnoreturn.h>
 
 
+// These are valid for 64 bit hosts.
+typedef short          int16_t;
+typedef int            int32_t;
+typedef unsigned short uint16_t;
+typedef unsigned int   uint32_t;
+
+
+// Our shared data.
 extern char **___recipeTargets;
 
 
+// Things missing that are nice to have.
+extern int fputc(int c, FILE *stream);
+extern void qsort(void *base, size_t nmemb, size_t size, int (*compar)(const void *, const void *));
+
+// Our API.
+extern char *utilCreateString(char *format, ...);
 extern void  recipeAddTarget(char *target);
 extern void  recipeMessage(char *format, ...);
 

src/compiler.c

@@ -23,12 +23,34 @@
 #include "common.h"
 #include "compiler.h"
 #include "libtcc.h"
+#include "sigsegv.h"
 #include "project.h"
 #include "messages.h"
 #include "utils.h"
 #include "array.h"
 
 
+#if HAVE_SIGSEGV_RECOVERY
+#include <setjmp.h>
+#include <signal.h>
+
+#if defined _WIN32 && !defined __CYGWIN__
+//  Windows doesn't have sigset_t.
+typedef int sigset_t;
+#define sigemptyset(set)
+#define sigprocmask(how,set,oldset)
+#endif
+
+volatile int runPass   = 0;
+jmp_buf      runRecipe;
+sigset_t     runSigSet;
+
+static void sigHandlerContinuation(void *arg1, void *arg2, void *arg3);
+int         sigHandler(void *faultAddress, int serious);
+
+#endif
+
+
 char **___recipeTargets = NULL;
 
 
@@ -49,7 +71,10 @@ static void compilerErrorHandler(void *opaque, const char *msg) {
 // All the paths passed in here are expected to be complete and absolute.
 int compilerRunRecipe(char *recipe, char *input, char *outputPath, void *context) {
 	TCCState *s;
-	int       result;
+	char     *oldLocation;
+	char      c;
+	int       x;
+	int       result = -255;
 	int       (*entry)(char *, char *);
 
 	___recipeTargets = NULL;
@@ -60,9 +85,15 @@ int compilerRunRecipe(char *recipe, char *input, char *outputPath, void *context
 		return -1;
 	}
 
-	tcc_set_options(s, "-Wall -Wno-write-strings");
+	// __resourcePath comes in with a trailing slash.  Temporarily remove it.
+	x = strlen(__resourcePath) - 1;
+	c = __resourcePath[x];
+	__resourcePath[x] = 0;
 	tcc_set_lib_path(s, __resourcePath);
 	tcc_add_sysinclude_path(s, __resourcePath);
+	__resourcePath[x] = c;
+
+	tcc_set_options(s, "-Wall -Wno-write-strings");
 	tcc_set_error_func(s, stdout, compilerErrorHandler);
 	tcc_set_output_type(s, TCC_OUTPUT_MEMORY);
 
@@ -72,9 +103,13 @@ int compilerRunRecipe(char *recipe, char *input, char *outputPath, void *context
 		return -4;
 	}
 
+	tcc_add_symbol(s, "fputc", fputc);
+	tcc_add_symbol(s, "qsort", qsort);
+
 	tcc_add_symbol(s, "___recipeTargets", ___recipeTargets);
 	tcc_add_symbol(s, "recipeAddTarget", recipeAddTarget);
 	tcc_add_symbol(s, "recipeMessage", recipeMessage);
+	tcc_add_symbol(s, "utilCreateString", utilCreateString);
 
 	if (tcc_relocate(s, TCC_RELOCATE_AUTO) < 0) {
 		// Something bad happened.
@@ -89,7 +124,41 @@ int compilerRunRecipe(char *recipe, char *input, char *outputPath, void *context
 		return -3;
 	}
 
+	getcwd(__utilFilenameBuffer, FILENAME_MAX);
+	oldLocation = strdup(__utilFilenameBuffer);
+	chdir(outputPath);
+
+#if HAVE_SIGSEGV_RECOVERY
+	sigset_t emptySet;
+
+	runPass = 0;
+
+	if (sigsegv_install_handler(&sigHandler) < 0)
+		return -5;
+
+	sigemptyset(&emptySet);
+	sigprocmask(SIG_BLOCK, &emptySet, &runSigSet);
+
+	switch (setjmp(runRecipe)) {
+		case 0:
 			result = entry(input, outputPath);
+		case 1:
+			sigprocmask(SIG_SETMASK, &runSigSet, NULL);
+			sigsegv_install_handler(NULL);
+			if (runPass != 0) {
+				message(MSG_SEVERE, "%s caused a segmentation fault!", recipe);
+			}
+			break;
+	}
+
+#else
+
+	result = entry(input, outputPath);
+
+#endif
+
+	chdir(oldLocation);
+	DEL(oldLocation);
 
 	while (arrlen(___recipeTargets) > 0) {
 		if (projectAddToTree(context, ___recipeTargets[0])) {
@@ -106,6 +175,21 @@ int compilerRunRecipe(char *recipe, char *input, char *outputPath, void *context
 }
 
 
+#if HAVE_SIGSEGV_RECOVERY
+static void sigHandlerContinuation(void *arg1, void *arg2, void *arg3) {
+	(void)arg1;
+	(void)arg2;
+	(void)arg3;
+	longjmp(runRecipe, runPass);
+}
+
+
+int sigHandler(void *faultAddress, int serious) {
+	runPass++;
+	return sigsegv_leave_handler(sigHandlerContinuation, NULL, NULL, NULL);
+}
+#endif
+
 void recipeAddTarget(char *target) {
 	arrput(___recipeTargets, strdup(target));
 }

src/main.c

@@ -59,8 +59,8 @@ int main(int argc, char **argv) {
 	utilExtractResource("/com/kangaroopunch/joeydev/resources/stdnoreturn.h");
 	utilExtractResource("/com/kangaroopunch/joeydev/resources/tccdefs.h");
 	utilExtractResource("/com/kangaroopunch/joeydev/resources/tcclib.h");
-	utilExtractResource("/com/kangaroopunch/joeydev/resources/tgmath.h");
+	utilExtractResource("/com/kangaroopunch/joeydev/resources/tgmath.h");   // Not needed.
-	utilExtractResource("/com/kangaroopunch/joeydev/resources/varargs.h");
+	utilExtractResource("/com/kangaroopunch/joeydev/resources/varargs.h");  // Not needed.
 	utilExtractResource("/com/kangaroopunch/joeydev/resources/recipe.h");
 
 	winJoeyDevCreate();

src/messages.c

@@ -48,7 +48,8 @@ void message(MessageTypesT level, char *format, ...) {
 	GtkWidget *label;
 	va_list    args;
 	char      *string;
-	char      *temp;
+	char      *msg;
+	char      *tok;
 	char      *labels[MSG_COUNT] = {
 							"<span foreground=\"gray\">   Info:</span>",
 							"<span foreground=\"yellow\">Warning:</span>",
@@ -74,13 +75,17 @@ void message(MessageTypesT level, char *format, ...) {
 
 	// Display message.
 	va_start(args, format);
-	temp = utilCreateStringVArgs(format, args);
+	msg = utilCreateStringVArgs(format, args);
 	va_end(args);
 
-	string = utilCreateString("<tt>%s  %s</tt>", labels[level], temp);
+	// Break multiline messages down into individual lines.
+	tok = strtok(msg, "\n");
+	while (tok != NULL) {
+		//***TODO*** Filter out things that could be mistaken as markup tags.
+		string = utilCreateString("<tt>%s  %s</tt>", labels[level], tok);
 
 		row = gtk_list_box_row_new();
-	box = gtk_box_new(GTK_ORIENTATION_HORIZONTAL,6);
+		box = gtk_box_new(GTK_ORIENTATION_HORIZONTAL, 6);
 		gtk_widget_set_hexpand(box, TRUE);
 		label = gtk_label_new(string);
 		gtk_label_set_use_markup(GTK_LABEL(label), TRUE);
@@ -92,6 +97,9 @@ void message(MessageTypesT level, char *format, ...) {
 		gtk_list_box_insert(GTK_LIST_BOX(_lstMessages), row, -1);
 
 		gtk_widget_show_all(row);
+
+		tok = strtok(NULL, "\n");
+	}
 }
 
 

src/project.c

@@ -180,6 +180,8 @@ EVENT void btnNewRecipeClicked(GtkButton *widget, gpointer userData) {
 
 	(void)widget;
 
+	//***TODO*** This should be an embedded file.
+	//***TODO*** We should also provide .gitignore and .gitattribute files.
 	if (utilFileSaveOtherAs((WindowDataT *)userData, "*.c", "Recipe", &newFile)) {
 		out = fopen(newFile, "wt");
 			fprintf(out, ""
@@ -1090,6 +1092,8 @@ static gboolean updateBuildOptions(ProjectDataT *self) {
 		result = TRUE;
 	}
 
+	//***TODO*** Grab the latest joey.h
+
 	// Unload current target listing.
 	backup = targetArrayCopy(self->targets);
 	targetArrayDelete(&self->targets);

tools/prebuild.sh

@@ -154,12 +154,23 @@ pushd "${ROOT}" || exit &> /dev/null
 
   if [[ ! -f ${INSTALLED}/lib/libtcc.a ]]; then
     echo Building Dependency:  TinyCC...
-    tar xzf ${THIRDPARTY}/tinycc-0.9.27.tar.bz2
+    tar xjf ${THIRDPARTY}/tinycc-0.9.27.tar.bz2
     pushd tinycc-0.9.27 || exit &> /dev/null
       ./configure \
         --prefix=${INSTALLED} \
-        --enable-static \
+        --enable-static
-        --with-libgcc
+      make
+      make install
+    popd || true &> /dev/null
+  fi
+
+  if [[ ! -f ${INSTALLED}/lib/libsigsegv.a ]]; then
+    echo Building Dependency:  libsigsegv...
+    tar xzf ${THIRDPARTY}/libsigsegv-2.14.tar.gz
+    pushd libsigsegv-2.14 || exit &> /dev/null
+      ./configure \
+        --prefix=${INSTALLED} \
+        --enable-static
       make
       make install
     popd || true &> /dev/null

ui/Messages.glade

@@ -5,8 +5,8 @@
   <object class="GtkWindow" id="winMessages">
     <property name="can-focus">False</property>
     <property name="title" translatable="yes">Messages</property>
-    <property name="default-width">440</property>
+    <property name="default-width">800</property>
-    <property name="default-height">250</property>
+    <property name="default-height">300</property>
     <signal name="delete-event" handler="winMessagesClose" swapped="no"/>
     <child>
       <object class="GtkScrolledWindow">