From d1786070c486749e7670def292c286cb25a11fc5 Mon Sep 17 00:00:00 2001
From: Asher Baker <asherkin@limetech.io>
Date: Sun, 28 Apr 2019 19:09:35 +0000
Subject: [PATCH] Add a load of ABI compat workarounds for older libstdc++
 versions

---
 AMBuildScript                                 |  1 +
 breakpad.sh                                   |  2 +-
 extension/extension.cpp                       | 37 ++++++++++++++++---
 ...sC1ERKSsjRKSaIcE-GLIBCXX-symbol-due-.patch | 28 ++++++++++++++
 4 files changed, 62 insertions(+), 6 deletions(-)
 create mode 100644 patches/0003-Avoid-using-_ZNSsC1ERKSsjRKSaIcE-GLIBCXX-symbol-due-.patch

diff --git a/AMBuildScript b/AMBuildScript
index b082cdf..4aa9a36 100644
--- a/AMBuildScript
+++ b/AMBuildScript
@@ -99,6 +99,7 @@ class SM:
 					self.compiler.AddToListVar('CXXFLAGS', '-Wno-implicit-exception-spec-mismatch')
 				self.compiler.AddToListVar('CDEFINES', 'HAVE_STDINT_H')
 				self.compiler.AddToListVar('CDEFINES', 'GNUC')
+				self.compiler.AddToListVar('CDEFINES', '_GLIBCXX_USE_CXX11_ABI=0')
 				if self.vendor == 'gcc':
 					self.compiler.AddToListVar('CFLAGS', '-mfpmath=sse')
 			elif isinstance(cxx, Cpp.MSVC):
diff --git a/breakpad.sh b/breakpad.sh
index 9516ab6..b736bbd 100755
--- a/breakpad.sh
+++ b/breakpad.sh
@@ -30,7 +30,7 @@ fi
 
 cd build
 
-../src/configure --enable-m32
+../src/configure --enable-m32 CXXFLAGS="-g -O2 -D_GLIBCXX_USE_CXX11_ABI=0"
 
 make src/tools/linux/dump_syms/dump_syms
 make src/client/linux/libbreakpad_client.a
diff --git a/extension/extension.cpp b/extension/extension.cpp
index e480548..acf315e 100644
--- a/extension/extension.cpp
+++ b/extension/extension.cpp
@@ -54,6 +54,36 @@ public:
 	}
 };
 
+// Taken from https://hg.mozilla.org/mozilla-central/file/3eb7623b5e63b37823d5e9c562d56e586604c823/build/unix/stdc%2B%2Bcompat/stdc%2B%2Bcompat.cpp
+extern "C" void __attribute__((weak)) __cxa_throw_bad_array_new_length() {
+    abort();
+}
+
+namespace std {
+    /* We shouldn't be throwing exceptions at all, but it sadly turns out
+       we call STL (inline) functions that do. */
+    void __attribute__((weak)) __throw_out_of_range_fmt(char const* fmt, ...) {
+        va_list ap;
+        char buf[1024];  // That should be big enough.
+
+        va_start(ap, fmt);
+        vsnprintf(buf, sizeof(buf), fmt, ap);
+        buf[sizeof(buf) - 1] = 0;
+        va_end(ap);
+
+        __throw_range_error(buf);
+    }
+} // namespace std
+
+// Updated versions of the SM ones for C++14
+void operator delete(void *ptr, size_t sz) {
+	free(ptr);
+}
+
+void operator delete[](void *ptr, size_t sz) {
+	free(ptr);
+}
+
 #elif defined _WINDOWS
 #define _STDINT // ~.~
 #include "client/windows/handler/exception_handler.h"
@@ -71,7 +101,6 @@ public:
 
 #include <sstream>
 #include <streambuf>
-#include <random>
 
 Accelerator g_accelerator;
 SMEXT_LINK(&g_accelerator);
@@ -390,11 +419,9 @@ class UploadThread: public IThread
 		if (!serverId[0]) {
 			serverIdFile = fopen(path, "w");
 			if (serverIdFile) {
-				std::random_device rd;
-				std::uniform_int_distribution<int> dist(0, 255);
 				g_pSM->Format(serverId, sizeof(serverId), "%02x%02x%02x%02x-%02x%02x-%02x%02x-%02x%02x-%02x%02x%02x%02x%02x%02x",
-					dist(rd), dist(rd), dist(rd), dist(rd), dist(rd), dist(rd), 0x40 | (dist(rd) & 0x0F), dist(rd),
-					0x80 | (dist(rd) & 0x3F), dist(rd), dist(rd), dist(rd), dist(rd), dist(rd), dist(rd), dist(rd));
+					rand() % 255, rand() % 255, rand() % 255, rand() % 255, rand() % 255, rand() % 255, 0x40 | ((rand() % 255) & 0x0F), rand() % 255,
+					0x80 | ((rand() % 255) & 0x3F), rand() % 255, rand() % 255, rand() % 255, rand() % 255, rand() % 255, rand() % 255, rand() % 255);
 				fputs(serverId, serverIdFile);
 				fclose(serverIdFile);
 			}
diff --git a/patches/0003-Avoid-using-_ZNSsC1ERKSsjRKSaIcE-GLIBCXX-symbol-due-.patch b/patches/0003-Avoid-using-_ZNSsC1ERKSsjRKSaIcE-GLIBCXX-symbol-due-.patch
new file mode 100644
index 0000000..7d2aec8
--- /dev/null
+++ b/patches/0003-Avoid-using-_ZNSsC1ERKSsjRKSaIcE-GLIBCXX-symbol-due-.patch
@@ -0,0 +1,28 @@
+From dbfb9811ef8d9f4f2b19f50c0534c865ab3698c9 Mon Sep 17 00:00:00 2001
+From: patches <patches@localhost>
+Date: Sun, 28 Apr 2019 18:45:57 +0000
+Subject: [PATCH 3/3] Avoid using _ZNSsC1ERKSsjRKSaIcE GLIBCXX symbol due to
+ version compat issues
+
+---
+ src/common/dwarf/elf_reader.cc | 4 ++--
+ 1 file changed, 2 insertions(+), 2 deletions(-)
+
+diff --git a/src/common/dwarf/elf_reader.cc b/src/common/dwarf/elf_reader.cc
+index 4135a51a..bfaaeefe 100644
+--- a/src/common/dwarf/elf_reader.cc
++++ b/src/common/dwarf/elf_reader.cc
+@@ -1202,8 +1202,8 @@ const char *ElfReader::GetSectionInfoByName(const string &section_name,
+ 
+ bool ElfReader::SectionNamesMatch(const string &name, const string &sh_name) {
+   if ((name.find(".debug_", 0) == 0) && (sh_name.find(".zdebug_", 0) == 0)) {
+-    const string name_suffix(name, strlen(".debug_"));
+-    const string sh_name_suffix(sh_name, strlen(".zdebug_"));
++    const string name_suffix(&name.c_str()[strlen(".debug_")]);
++    const string sh_name_suffix(&sh_name.c_str()[strlen(".zdebug_")]);
+     return name_suffix == sh_name_suffix;
+   }
+   return name == sh_name;
+-- 
+2.17.2
+