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fixed #15781: Potential memory issue in StringUtil::format if argument size is greater than 4096 #15903

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Aug 14, 2023
Merged

fixed #15781: Potential memory issue in StringUtil::format if argument size is greater than 4096 #15903

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6560fa9
fixed #15781: Potential memory issue in StringUtil::format if argumen…
dumganhar Aug 9, 2023
561ad33
Fix missing va_end
dumganhar Aug 9, 2023
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13 changes: 10 additions & 3 deletions native/cocos/base/StringUtil.cpp
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Original file line number Diff line number Diff line change
Expand Up @@ -86,12 +86,19 @@ int StringUtil::printf(char *buf, const char *last, const char *fmt, ...) {
}

ccstd::string StringUtil::format(const char *fmt, ...) {
char sz[4096];
va_list args;
va_start(args, fmt);
vprintf(sz, sz + sizeof(sz) - 1, fmt, args);
// Caculate the string length
int length = vsnprintf(nullptr, 0, fmt, args);
if (length <= 0) {
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return "";
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}
ccstd::string ret;
ret.resize(length, '\0');
int writtenLength = vsnprintf(const_cast<char*>(ret.data()), length + 1, fmt, args);
CC_ASSERT(writtenLength == length);
va_end(args);
return sz;
return ret;
}

ccstd::vector<ccstd::string> StringUtil::split(const ccstd::string &str, const ccstd::string &delims, uint32_t maxSplits) {
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