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Make MIMALLOC_SHOW_STATS work with redirected stderr

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Setting `MIMALLOC_SHOW_STATS` to ask mimalloc to print out something
after the process is done is the easiest way to verify that a
mimalloc-enabled Git is running.

So it better work and not try to write to a Win32 Console when it got a
regular file handle instead or, as is the case in Git for Windows'
regular Git Bash window, an emulated pseudo terminal.

Signed-off-by: Johannes Schindelin <johannes.schindelin@gmx.de>
This commit is contained in:
Johannes Schindelin 2022-08-12 14:23:36 +02:00
parent edb181c377
commit 089e85b113
1 changed files with 7 additions and 0 deletions
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7
src/options.c
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@ -180,8 +180,15 @@ static void mi_cdecl mi_out_stderr(const char* msg, void* arg) {
if (!_mi_preloading()) { if (!_mi_preloading()) {
// _cputs(msg); // _cputs cannot be used at is aborts if it fails to lock the console // _cputs(msg); // _cputs cannot be used at is aborts if it fails to lock the console
static HANDLE hcon = INVALID_HANDLE_VALUE; static HANDLE hcon = INVALID_HANDLE_VALUE;
static int write_to_console;
if (hcon == INVALID_HANDLE_VALUE) { if (hcon == INVALID_HANDLE_VALUE) {
CONSOLE_SCREEN_BUFFER_INFO sbi;
hcon = GetStdHandle(STD_ERROR_HANDLE); hcon = GetStdHandle(STD_ERROR_HANDLE);
write_to_console = GetConsoleScreenBufferInfo(hcon, &sbi) ? 1 : 0;
}
if (!write_to_console) {
fputs(msg, stderr);
return;
} }
const size_t len = strlen(msg); const size_t len = strlen(msg);
if (hcon != INVALID_HANDLE_VALUE && len > 0 && len < UINT32_MAX) { if (hcon != INVALID_HANDLE_VALUE && len > 0 && len < UINT32_MAX) {