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54 lines
1.6 KiB
54 lines
1.6 KiB
/*
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* Copyright 2002-2019 Intel Corporation.
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*
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* This software is provided to you as Sample Source Code as defined in the accompanying
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* End User License Agreement for the Intel(R) Software Development Products ("Agreement")
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* section 1.L.
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*
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* This software and the related documents are provided as is, with no express or implied
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* warranties, other than those that are expressly stated in the License.
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*/
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#include <stdio.h>
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#include <stdint.h>
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#include <sys/mman.h>
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#include <unistd.h>
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#define PAGE_TO_CONSUME 0x500
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/*
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* This function will consume (at least) numPagesDoubled of half pages
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* (2KB each) from the stack memory.
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*/
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void consumeHalfPages(int numPagesDoubled)
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{
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int i;
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char buf[2048];
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if (--numPagesDoubled > 0)
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consumeHalfPages(numPagesDoubled);
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for (i = 0; i < sizeof(buf); i++)
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buf[i] = (char)i;
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// Dummy print to prevent opt-out of 'buf'
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printf("%s", buf);
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}
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int main( int argc, char **argv, char **envp )
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{
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intptr_t sp = (intptr_t)&argc;
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size_t pgsize = getpagesize();
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void* end_of_stack = NULL;
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sp &= ~(pgsize-1);
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// Find the end of the stack (the page before the one that mprotect fails on)
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for (end_of_stack = (void*)sp; 0 == mprotect(end_of_stack + pgsize, pgsize,PROT_READ|PROT_WRITE); end_of_stack += pgsize);
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// print part of the stack in PIN's -reserve_memory file format
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printf("%p %p data 0\n", (void*)(sp - PAGE_TO_CONSUME * pgsize), end_of_stack);
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// The call below will consume at least PAGE_TO_CONSUME*4KB memory from the stack
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consumeHalfPages(PAGE_TO_CONSUME * 2);
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return 0;
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}
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