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i#3496: Fix crash in drmgr-test #4008

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merged 2 commits into from
Jan 10, 2020
Merged

i#3496: Fix crash in drmgr-test #4008

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da008a5
i#3496: Fix crash in drmgr-test
derekbruening Jan 9, 2020
491203d
Merge branch 'master' into i3496-drmgr-test
derekbruening Jan 10, 2020
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14 changes: 9 additions & 5 deletions suite/tests/client-interface/drmgr-test.c
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Original file line number Diff line number Diff line change
@@ -1,5 +1,5 @@
/* **********************************************************
* Copyright (c) 2011-2019 Google, Inc. All rights reserved.
* Copyright (c) 2011-2020 Google, Inc. All rights reserved.
* **********************************************************/

/*
Expand Down Expand Up @@ -323,13 +323,17 @@ main(int argc, char **argv)
/* Test xsave for drutil_opnd_mem_size_in_bytes. We're assuming that
* xsave support is available and enabled, which should be the case
* on all machines we're running on.
* Ideally we'd run whatever cpuid invocations are needed to figure out the exact
* size but 16K is more than enough for the foreseeable future: it's 576 bytes
* with SSE and ~2688 for AVX-512.
*/
char ALIGN_VAR(64) buffer[2048];
__asm("or $-1, %%eax\n"
"\txsave %0"
char ALIGN_VAR(64) buffer[16 * 1024];
__asm("xor %%edx, %%edx\n\t"
"or $-1, %%eax\n\t"
"xsave %0\n\t"
: "=m"(buffer)
:
: "eax");
: "eax", "edx", "memory");
# endif

intervals = 10;
Expand Down