christoph/wamr
1
Fork 0
Code Releases Activity

Provide default vprintf on UWP (#2725)

Browse Source 
UWP apps do not have a console attached so any output to stdout/stderr
is lost. Therefore, provide a default BH_VPRINTF in that case for debug
builds which redirects output to the debugger.
This commit is contained in:
zoraaver
2023-11-07 12:37:43 +00:00
committed by GitHub
parent 77b6bce679
commit 3c9cd40aa6
3 changed files with 50 additions and 8 deletions
Download Patch File Download Diff File Expand all files Collapse all files

12
core/iwasm/libraries/libc-wasi/sandboxed-system-primitives/src/posix.c
View File

@ -1108,19 +1108,17 @@ wasmtime_ssp_fd_write(wasm_exec_env_t exec_env, struct fd_table *curfds,
error = blocking_op_writev(exec_env, fo->file_handle, iov, (int)iovcnt,
nwritten);
#else
ssize_t len = 0;
/* redirect stdout/stderr output to BH_VPRINTF function */
if (fo->is_stdio) {
int i;
const struct iovec *iov1 = (const struct iovec *)iov;
for (i = 0; i < (int)iovcnt; i++, iov1++) {
if (iov1->iov_len > 0 && iov1->iov_base) {
*nwritten = 0;
for (i = 0; i < (int)iovcnt; i++) {
if (iov[i].buf_len > 0 && iov[i].buf != NULL) {
char format[16];
/* make up format string "%.ns" */
snprintf(format, sizeof(format), "%%.%ds", (int)iov1->iov_len);
len += (ssize_t)os_printf(format, iov1->iov_base);
snprintf(format, sizeof(format), "%%.%ds", (int)iov[i].buf_len);
*nwritten += (size_t)os_printf(format, iov[i].buf);
}
}
}