[LSAN] Increase stack space for guard-page.c test

[arichardson]

Summary

When running the tests on a Ubuntu 18.04 machine this test is crashing for
me inside the runtime linker. My guess is that it is trying to save more
registers (possibly large vector ones) and the current stack space is not
sufficient.

[merge_guards_bot]

Unit tests: pass. 60839 tests passed, 0 failed and 726 were skipped.

clang-format: pass.

Build artifacts: console-log.txt, CMakeCache.txt, test-results.xml, diff.json

[eugenis]

Does it crash in _dl_runtime_resolve_xsavec?
LGTM

[arichardson]

In D71461#1783931, @eugenis wrote:

Does it crash in _dl_runtime_resolve_xsavec?
LGTM

Yes exactly that's the function.

[Switching to Thread 0x7ffff38ff700 (LWP 44767)]
_dl_runtime_resolve_xsavec () at ../sysdeps/x86_64/dl-trampoline.h:92
92      ../sysdeps/x86_64/dl-trampoline.h: No such file or directory.

compiler-rt/test/lsan/TestCases/Linux/guard-page.c

 
 static void* thread(void* arg) {
   (void)arg;
   ucontext_t ctx;
   void* stack;
 
   if (getcontext(&ctx) < 0)
     die("getcontext", 0);
-  stack = malloc(1 << 11);
+  stack = malloc(1 << 12);
   if (stack == NULL)
     die("malloc", 0);
   ctx.uc_stack.ss_sp = stack;
-  ctx.uc_stack.ss_size = 1 << 11;
+  ctx.uc_stack.ss_size = 1 << 12;
   makecontext(&ctx, ctxfunc, 0);
   setcontext(&ctx);
   die("setcontext", 0);
   return NULL;
 }
 
 int main() {
   pthread_t tid;