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QPlainTestLogger: simplify printBenchmarkResult()

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Avoids having lots of buffers that occupy the stack.

Change-Id: I3c79b7e08fa346988dfefffd17203c5045a7fc86
Reviewed-by: Fabian Kosmale <fabian.kosmale@qt.io>
This commit is contained in:
Thiago Macieira 2022-10-21 17:03:24 -07:00
parent c958e5daf1
commit 0e8eb20af4
1 changed files with 47 additions and 54 deletions
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101
src/testlib/qplaintestlogger.cpp
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@ -10,7 +10,8 @@
#include <QtCore/private/qlogging_p.h>
#include <stdarg.h>
#include <array>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
@ -38,6 +39,39 @@ QT_BEGIN_NAMESPACE
using namespace Qt::StringLiterals;
namespace {
template <int N> struct FixedBufString
{
static constexpr size_t MaxSize = N;
size_t used = 0;
std::array<char, N + 2> buf; // for the newline and terminating null
FixedBufString()
{
buf[0] = '\0';
}
operator const char *() const
{
return buf.data();
}
void append(const char *text)
{
size_t len = qMin(strlen(text), MaxSize - used);
memcpy(buf.data() + used, text, len);
used += len;
buf[used] = '\0';
}
template <typename... Args> void appendf(const char *format, Args &&... args)
{
// vsnprintf includes the terminating null
used += qsnprintf(buf.data() + used, MaxSize - used + 1, format,
std::forward<Args>(args)...);
}
};
} // unnamed namespace
namespace QTest {
static const char *incidentType2String(QAbstractTestLogger::IncidentTypes type)
@ -165,15 +199,6 @@ namespace QTest {
return print;
}
template <typename T>
qsizetype formatResult(char * buffer, int bufferSize, T number, int significantDigits)
{
QByteArray result = formatResult(number, significantDigits);
qsizetype size = result.size();
qstrncpy(buffer, result.constData(), bufferSize);
return size;
}
}
/*! \internal
@ -242,58 +267,26 @@ void QPlainTestLogger::printMessage(MessageSource source, const char *type, cons
void QPlainTestLogger::printBenchmarkResult(const QBenchmarkResult &result)
{
const char *bmtag = QTest::benchmarkResult2String();
FixedBufString<1022> buf;
char buf1[1024];
qsnprintf(
buf1, sizeof(buf1), "%s: %s::%s",
bmtag,
QTestResult::currentTestObjectName(),
result.context.slotName.toLatin1().data());
buf.appendf("%s: %s::%s", QTest::benchmarkResult2String(),
QTestResult::currentTestObjectName(), result.context.slotName.toLatin1().data());
char bufTag[1024];
bufTag[0] = 0;
QByteArray tag = result.context.tag.toLocal8Bit();
if (tag.isEmpty() == false) {
qsnprintf(bufTag, sizeof(bufTag), ":\"%s\"", tag.data());
}
char fillFormat[8];
int fillLength = 5;
qsnprintf(fillFormat, sizeof(fillFormat), ":\n%%%ds", fillLength);
char fill[1024];
qsnprintf(fill, sizeof(fill), fillFormat, "");
if (QByteArray tag = result.context.tag.toLocal8Bit(); !tag.isEmpty())
buf.appendf(":\"%s\"", tag.data());
const char * unitText = QTest::benchmarkMetricUnit(result.measurement.metric);
int significantDigits = QTest::countSignificantDigits(result.measurement.value);
qreal valuePerIteration = qreal(result.measurement.value) / qreal(result.iterations);
char resultBuffer[100] = "";
QTest::formatResult(resultBuffer, 100, valuePerIteration, QTest::countSignificantDigits(result.measurement.value));
buf.appendf(":\n %s %s%s",
QTest::formatResult(valuePerIteration, significantDigits).constData(),
unitText, result.setByMacro ? " per iteration" : "");
char buf2[1024];
qsnprintf(buf2, sizeof(buf2), "%s %s", resultBuffer, unitText);
char buf2_[1024];
QByteArray iterationText = " per iteration";
Q_ASSERT(result.iterations > 0);
qsnprintf(buf2_, sizeof(buf2_), "%s", iterationText.data());
buf.appendf(" (total: %s, iterations: %d)",
QTest::formatResult(result.measurement.value, significantDigits).constData(),
result.iterations);
char buf3[1024];
Q_ASSERT(result.iterations > 0);
QTest::formatResult(resultBuffer, 100, result.measurement.value,
QTest::countSignificantDigits(result.measurement.value));
qsnprintf(buf3, sizeof(buf3), " (total: %s, iterations: %d)", resultBuffer, result.iterations);
char buf[1024];
if (result.setByMacro) {
qsnprintf(buf, sizeof(buf), "%s%s%s%s%s%s\n", buf1, bufTag, fill, buf2, buf2_, buf3);
} else {
qsnprintf(buf, sizeof(buf), "%s%s%s%s\n", buf1, bufTag, fill, buf2);
}
memcpy(buf, bmtag, strlen(bmtag));
outputMessage(buf);
}