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Use alternate method to check getrandom support #3848

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Merged
merged 1 commit into from
Oct 10, 2024
Merged

Use alternate method to check getrandom support #3848

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16 changes: 10 additions & 6 deletions core/iwasm/libraries/libc-emcc/libc_emcc_wrapper.c
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Original file line number Diff line number Diff line change
Expand Up @@ -7,8 +7,13 @@
#include "bh_log.h"
#include "wasm_export.h"
#include "../interpreter/wasm.h"
#if !defined(_DEFAULT_SOURCE) && !defined(BH_PLATFORM_LINUX_SGX)
#include "sys/syscall.h"

#if defined(__linux__)
#include <linux/version.h>
#if LINUX_VERSION_CODE >= KERNEL_VERSION(3, 17, 0)
#define HAVE_SYSCALL_GETRANDOM
#include <sys/syscall.h>
#endif
#endif

/* clang-format off */
Expand Down Expand Up @@ -270,11 +275,10 @@ getentropy_wrapper(wasm_exec_env_t exec_env, void *buffer, uint32 length)
{
if (buffer == NULL)
return -1;
#if defined(_DEFAULT_SOURCE) || defined(BH_PLATFORM_LINUX_SGX) \
|| defined(__APPLE__)
return getentropy(buffer, length);
#else
#if defined(HAVE_SYSCALL_GETRANDOM)
return syscall(SYS_getrandom, buffer, length, 0);
#else
return getentropy(buffer, length);
#endif
}

Expand Down