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Ryan Houdek
696f69e442
Turns out the Linux kernel's definition of `MINSIGSTKSZ` and glibc's definition of `MINSIGSTKSZ` don't match. The linux kernel has a massive comment about it in `arch/x86/kernel/signal.c`. Also adds a unittest for it. For #5206
21 lines
432 B
C++
21 lines
432 B
C++
#include <catch2/catch_test_macros.hpp>
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#include <unistd.h>
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#include <sys/wait.h>
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#include <sys/syscall.h>
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TEST_CASE("sysaltstack - minimum") {
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char test[4096];
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constexpr size_t EXPECTED_MIN = 2048;
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stack_t stack {
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.ss_sp = test,
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.ss_flags = 0,
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.ss_size = 0,
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};
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for (size_t i = 1; i < sizeof(test); ++i) {
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stack.ss_size = i;
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CHECK(sigaltstack(&stack, nullptr) == (i < EXPECTED_MIN ? -1 : 0));
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}
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}
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