From 64e03d0149bed895d00e20e71da775e2aabf2f81 Mon Sep 17 00:00:00 2001 From: athenian200 Date: Tue, 1 Oct 2019 07:26:40 -0500 Subject: MoonchildProductions#1251 - Part 3: Finally end the long tradition of casting getpid() to int. https://bugzilla.mozilla.org/show_bug.cgi?id=535106 https://bugzilla.mozilla.org/show_bug.cgi?id=1359841 Like many parts of the busted Solaris support, this one has its origins in the pre-Firefox days. Bug 535106, another Mozilla suite bug. It keeps coming up because the core issue is never addressed, the fact that nsTSubstring doesn't know how to handle pid_t. I think the explicit cast to int is a band-aid they use because they know if they touch that substring header file to make it handle pid_t, they'll probably be asked to fix all the other problems with it. I honestly think it just works by accident on other platforms because it's implicitly cast to signed or unsigned int, even though the POSIX standard says pid_t can be either long or int, and work as either a signed or unsigned integer. Whatever the case may be, it's handled better on Solaris now than it was. Ironically enough, the main point of having pid_t rather than just having pids be int or something is to hide this little implementation detail so you can just use pid_t for the return type in portable code without having to worry about what it is on a specific platform. The unfortunate way Mozilla implemented string functions turns that on its head and makes the good things about pid_t into liabilities rather than assets. --- xpcom/base/nsTraceRefcnt.cpp | 2 +- xpcom/string/nsTSubstring.h | 14 ++++++++++++++ 2 files changed, 15 insertions(+), 1 deletion(-) (limited to 'xpcom') diff --git a/xpcom/base/nsTraceRefcnt.cpp b/xpcom/base/nsTraceRefcnt.cpp index da51305a91..48448dbd92 100644 --- a/xpcom/base/nsTraceRefcnt.cpp +++ b/xpcom/base/nsTraceRefcnt.cpp @@ -657,7 +657,7 @@ InitLog(const char* aEnvVar, const char* aMsg, FILE** aResult) fname.Append('_'); fname.Append((char*)XRE_ChildProcessTypeToString(XRE_GetProcessType())); fname.AppendLiteral("_pid"); - fname.AppendInt((uint32_t)getpid()); + fname.AppendInt(getpid()); if (hasLogExtension) { fname.AppendLiteral(".log"); } diff --git a/xpcom/string/nsTSubstring.h b/xpcom/string/nsTSubstring.h index 53b4fb9a82..2b0723c04e 100644 --- a/xpcom/string/nsTSubstring.h +++ b/xpcom/string/nsTSubstring.h @@ -9,6 +9,9 @@ #include "mozilla/MemoryReporting.h" #include "mozilla/IntegerTypeTraits.h" #include "mozilla/Span.h" +#ifdef XP_SOLARIS +#include +#endif #ifndef MOZILLA_INTERNAL_API #error Cannot use internal string classes without MOZILLA_INTERNAL_API defined. Use the frozen header nsStringAPI.h instead. @@ -587,6 +590,17 @@ public: const char* fmt = aRadix == 10 ? "%d" : aRadix == 8 ? "%o" : "%x"; AppendPrintf(fmt, aInteger); } +#ifdef XP_SOLARIS + void AppendInt(pid_t aInteger) + { + AppendPrintf("%lu", aInteger); + } + void AppendInt(pid_t aInteger, int aRadix) + { + const char* fmt = aRadix == 10 ? "%lu" : aRadix == 8 ? "%lo" : "%lx"; + AppendPrintf(fmt, aInteger); + } +#endif void AppendInt(uint32_t aInteger) { AppendPrintf("%u", aInteger); -- cgit v1.2.3