[Diagnostics] In-Proc CrashReport lifecycle

src/coreclr/debug/crashreport/CMakeLists.txt

@@ -1,9 +1,11 @@
 set(CMAKE_INCLUDE_CURRENT_DIR ON)
 
 set(CRASHREPORT_SOURCES
+    crashreportstringutils.cpp
     signalsafeformatter.cpp
     signalsafejsonwriter.cpp
     signalsafeconsolewriter.cpp
+    inproccrashreportlifecycle.cpp
     inproccrashreporter.cpp
     inproccrashreportwatchdog.cpp
 )

src/coreclr/debug/crashreport/crashreportstringutils.cpp

@@ -0,0 +1,45 @@
+// Licensed to the .NET Foundation under one or more agreements.
+// The .NET Foundation licenses this file to you under the MIT license.
+
+#include "crashreportstringutils.h"
+
+#include <string.h>
+
+void CrashReportStringUtils::CopyString(char* buffer, size_t bufferSize, const char* value)
+{
+    if (buffer == nullptr || bufferSize == 0)
+    {
+        return;
+    }
+
+    if (value == nullptr)
+    {
+        buffer[0] = '\0';
+        return;
+    }
+
+    size_t toCopy = strnlen(value, bufferSize - 1);
+    if (toCopy != 0)
+    {
+        memcpy(buffer, value, toCopy);
+    }
+
+    buffer[toCopy] = '\0';
+}
+
+bool CrashReportStringUtils::AppendString(char* buffer, size_t bufferSize, size_t* pos, const char* value)
+{
+    if (buffer == nullptr || pos == nullptr || value == nullptr || bufferSize == 0)
+    {
+        return false;
+    }
+
+    size_t p = *pos;
+    while (*value != '\0' && p + 1 < bufferSize)
+    {
+        buffer[p++] = *value++;
+    }
+    buffer[p] = '\0';
+    *pos = p;
+    return *value == '\0';
+}

src/coreclr/debug/crashreport/crashreportstringutils.h

@@ -0,0 +1,32 @@
+// Licensed to the .NET Foundation under one or more agreements.
+// The .NET Foundation licenses this file to you under the MIT license.
+
+// Shared, allocation-free, bounds-safe string helpers used by both the in-proc
+// crash reporter and the crash report lifecycle. These are safe to call from the
+// signal/crash path: they perform no heap allocation and never call into the
+// runtime.
+
+#pragma once
+
+#include <stddef.h>
+
+namespace CrashReportStringUtils
+{
+    // Copies value into buffer, truncating if necessary, and always
+    // null-terminates. A null value yields an empty string. No-op if buffer is
+    // null or bufferSize is 0.
+    void CopyString(
+        char* buffer,
+        size_t bufferSize,
+        const char* value);
+
+    // Appends value to buffer starting at *pos, copying as much as fits, advancing
+    // *pos past the characters actually written, and always null-terminating.
+    // Returns true if the entire value fit; returns false if the value was
+    // truncated, the arguments are invalid, or bufferSize is 0.
+    bool AppendString(
+        char* buffer,
+        size_t bufferSize,
+        size_t* pos,
+        const char* value);
+}