Fix getRedzoneSize which in most cases was underestimating (by a smal…

…l ammount) the distance between stack handler and signaller.
OpenSmalltalk · Feb 25, 2022 · 41e16da · 41e16da
1 parent f779431
commit 41e16da
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Showing 6 changed files with 6 additions and 6 deletions.
diff --git a/platforms/Mac OS/vm/sqMacMain.c b/platforms/Mac OS/vm/sqMacMain.c
@@ -1112,7 +1112,7 @@ getRedzoneSize()
 
 	do kill(getpid(),SIGPROF); while (!p);
 	(void)sigaction(SIGPROF, &old, 0);
-	return (char *)min(&old,&handler_action) - sizeof(struct sigaction) - p;
+	return (char *)min(&old,&handler_action) - p;
 }
 
 sqInt reportStackHeadroom;

diff --git a/platforms/iOS/vm/Common/Classes/sqSqueakMainApp.m b/platforms/iOS/vm/Common/Classes/sqSqueakMainApp.m
@@ -473,7 +473,7 @@ Some of this code was funded via a grant from the European Smalltalk User Group
 
 	do kill(getpid(),SIGPROF); while (!p);
 	(void)sigaction(SIGPROF, &old, 0);
-	return (char *)min(&old,&handler_action) - sizeof(struct sigaction) - p;
+	return (char *)min(&old,&handler_action) - p;
 }
 
 static int stackPageHeadroom;

diff --git a/platforms/minheadless/unix/sqPlatformSpecific-Unix.c b/platforms/minheadless/unix/sqPlatformSpecific-Unix.c
@@ -196,7 +196,7 @@ getRedzoneSize()
 
 	do kill(getpid(),SIGPROF); while (!p);
 	(void)sigaction(SIGPROF, &old, 0);
-	return (char *)min(&old,&handler_action) - sizeof(struct sigaction) - p;
+	return (char *)min(&old,&handler_action) - p;
 }
 
 sqInt reportStackHeadroom;

diff --git a/platforms/minheadless/windows/sqPlatformSpecific-Win32.c b/platforms/minheadless/windows/sqPlatformSpecific-Win32.c
@@ -338,7 +338,7 @@ getRedzoneSize()
 
     do kill(getpid(), SIGPROF); while (!p);
     (void)sigaction(SIGPROF, &old, 0);
-    return (char *)min(&old, &handler_action) - sizeof(struct sigaction) - p;
+    return (char *)min(&old, &handler_action) - p;
 #else /* cygwin */
     void(*old)(int) = signal(SIGBREAK, sighandler);
 

diff --git a/platforms/unix/vm/sqUnixMain.c b/platforms/unix/vm/sqUnixMain.c
@@ -2331,7 +2331,7 @@ getRedzoneSize()
 
 	do kill(getpid(),SIGPROF); while (!p);
 	(void)sigaction(SIGPROF, &old, 0);
-	return (char *)min(&old,&handler_action) - sizeof(struct sigaction) - p;
+	return (char *)min(&old,&handler_action) - p;
 }
 
 sqInt reportStackHeadroom;

diff --git a/platforms/win32/vm/sqWin32Main.c b/platforms/win32/vm/sqWin32Main.c
@@ -2353,7 +2353,7 @@ getRedzoneSize()
 
 	do kill(getpid(),SIGPROF); while (!p);
 	(void)sigaction(SIGPROF, &old, 0);
-	return (char *)min(&old,&handler_action) - sizeof(struct sigaction) - p;
+	return (char *)min(&old,&handler_action) - p;
 #else /* cygwin */
 	void (*old)(int) = signal(SIGBREAK, sighandler);