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8272472: StackGuardPages test doesn't build with glibc 2.34 #37

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8272472: StackGuardPages test doesn't build with glibc 2.34 #37

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8272472: StackGuardPages test doesn't build with glibc 2.34
Aug 22, 2021
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jankratochvil Dec 1, 2022
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13 changes: 11 additions & 2 deletions test/hotspot/jtreg/runtime/StackGuardPages/exeinvoke.c
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@@ -1,5 +1,5 @@
/*
* Copyright (c) 2010, 2020, Oracle and/or its affiliates. All rights reserved.
* Copyright (c) 2010, 2021, Oracle and/or its affiliates. All rights reserved.
* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
*
* This code is free software; you can redistribute it and/or modify it
Expand Down Expand Up @@ -68,8 +68,17 @@ static void handler(int sig, siginfo_t *si, void *unused) {
longjmp(context, 1);
}

static char* altstack = NULL;

void set_signal_handler() {
static char altstack[SIGSTKSZ];
if (altstack == NULL) {
// Dynamically allocated in case SIGSTKSZ is not constant
altstack = malloc(SIGSTKSZ);
if (altstack == NULL) {
fprintf(stderr, "Test ERROR. Unable to malloc altstack space\n");
exit(7);
}
}

stack_t ss = {
.ss_size = SIGSTKSZ,
Expand Down