ci: enable warnings as errors

.github/workflows/android.yml

@@ -17,28 +17,35 @@ jobs:
         build_type: [Debug, Release]
 
     steps:
-    - uses: actions/checkout@v2
+      - uses: actions/checkout@v2
 
-    - name: Setup Ninja
-      uses: ashutoshvarma/setup-ninja@master
-      with:
-        version: 1.10.0
+      - name: Setup Ninja
+        uses: ashutoshvarma/setup-ninja@master
+        with:
+          version: 1.10.0
 
-    - name: Configure
-      run: |
-        cmake -S . -B build_${{matrix.abi}} \
-              -DANDROID_ABI=${{matrix.abi}} \
-              -DANDROID_NATIVE_API_LEVEL=28 \
-              -DANDROID_STL=c++_shared \
-              -DCMAKE_BUILD_TYPE=${{matrix.build_type}} \
-              -DCMAKE_CXX_EXTENSIONS=OFF \
-              -DCMAKE_CXX_STANDARD=${{matrix.std}} \
-              -DCMAKE_CXX_STANDARD_REQUIRED=ON \
-              -DCMAKE_TOOLCHAIN_FILE=${ANDROID_NDK_HOME}/build/cmake/android.toolchain.cmake \
-              -G Ninja \
-              -Werror
+      - name: Setup C++98 Environment
+        if: matrix.std == '98'
+        run: |
+          echo 'CXXFLAGS=-Wno-error=variadic-macros -Wno-error=long-long ${{env.CXXFLAGS}}' >> $GITHUB_ENV
 
-    - name: Build
-      run: |
-        cmake --build build_${{matrix.abi}} \
-              --config ${{matrix.build_type}}
+      - name: Configure
+        env:
+          CXXFLAGS: -Wall -Wextra -Wpedantic -Wsign-conversion -Wtautological-compare -Werror ${{env.CXXFLAGS}}
+        run: |
+          cmake -S . -B build_${{matrix.abi}} \
+                -DANDROID_ABI=${{matrix.abi}} \
+                -DANDROID_NATIVE_API_LEVEL=28 \
+                -DANDROID_STL=c++_shared \
+                -DCMAKE_BUILD_TYPE=${{matrix.build_type}} \
+                -DCMAKE_CXX_EXTENSIONS=OFF \
+                -DCMAKE_CXX_STANDARD=${{matrix.std}} \
+                -DCMAKE_CXX_STANDARD_REQUIRED=ON \
+                -DCMAKE_TOOLCHAIN_FILE=${ANDROID_NDK_HOME}/build/cmake/android.toolchain.cmake \
+                -G Ninja \
+                -Werror
+
+      - name: Build
+        run: |
+          cmake --build build_${{matrix.abi}} \
+                --config ${{matrix.build_type}}

.github/workflows/linux.yml

@@ -60,7 +60,14 @@ jobs:
           echo 'CXXFLAGS=--coverage' >> $GITHUB_ENV
           echo 'GTest_ROOT=${{github.workspace}}/gtest' >> $GITHUB_ENV
 
+      - name: Setup C++98 Environment
+        if: matrix.std == '98'
+        run: |
+          echo 'CXXFLAGS=-Wno-error=variadic-macros -Wno-error=long-long ${{env.CXXFLAGS}}' >> $GITHUB_ENV
+
       - name: Configure
+        env:
+          CXXFLAGS: -Wall -Wextra -Wsign-conversion -Wtautological-compare -Werror ${{env.CXXFLAGS}}
         run: |
           cmake -S . -B build_${{matrix.build_type}} \
             -DBUILD_SHARED_LIBS=${{matrix.lib == 'shared'}} \

.github/workflows/macos.yml

@@ -31,11 +31,6 @@ jobs:
         run: |
           echo 'CXXFLAGS=--coverage' >> $GITHUB_ENV
 
-      - name: Setup C++98 Environment
-        if: matrix.std == '98'
-        run: |
-          echo 'CXXFLAGS=-Wall -Wextra -Wsign-conversion -Wtautological-compare -Werror ${{env.CXXFLAGS}}' >> $GITHUB_ENV
-
       - name: Configure
         shell: bash
         env:

.github/workflows/windows.yml

@@ -100,9 +100,14 @@ jobs:
             mingw-w64-${{matrix.env}}-gflags
             mingw-w64-${{matrix.env}}-ninja
 
+      - name: Setup C++98 Environment
+        if: matrix.std == '98'
+        run: |
+          echo 'CXXFLAGS=-Wno-error=variadic-macros -Wno-error=long-long ${{env.CXXFLAGS}}' >> $GITHUB_ENV
+
       - name: Configure
         env:
-          CXXFLAGS: -Wall -Wextra -Wpedantic -Wsign-conversion -Wtautological-compare -Werror -Wno-error=variadic-macros -Wno-error=long-long
+          CXXFLAGS: -Wall -Wextra -Wpedantic -Wsign-conversion -Wtautological-compare -Werror ${{env.CXXFLAGS}}
         run: |
           if [[ ${{matrix.build_type}} == "Debug" ]]; then
             export CXXFLAGS="--coverage ${CXXFLAGS}"

src/symbolize.cc

@@ -666,12 +666,12 @@ OpenObjectFileContainingPcAndGetStartAddress(uint64_t pc,
 
 // POSIX doesn't define any async-signal safe function for converting
 // an integer to ASCII. We'll have to define our own version.
-// itoa_r() converts a (signed) integer to ASCII. It returns "buf", if the
+// itoa_r() converts an (unsigned) integer to ASCII. It returns "buf", if the
 // conversion was successful or NULL otherwise. It never writes more than "sz"
 // bytes. Output will be truncated as needed, and a NUL character is always
 // appended.
 // NOTE: code from sandbox/linux/seccomp-bpf/demo.cc.
-static char *itoa_r(intptr_t i, char *buf, size_t sz, unsigned base, size_t padding) {
+static char *itoa_r(uintptr_t i, char *buf, size_t sz, unsigned base, size_t padding) {
   // Make sure we can write at least one NUL byte.
   size_t n = 1;
   if (n > sz)
@@ -684,21 +684,6 @@ static char *itoa_r(intptr_t i, char *buf, size_t sz, unsigned base, size_t padd
 
   char *start = buf;
 
-  uintptr_t j = static_cast<uintptr_t>(i);
-
-  // Handle negative numbers (only for base 10).
-  if (i < 0 && base == 10) {
-    // This does "j = -i" while avoiding integer overflow.
-    j = static_cast<uintptr_t>(-(i + 1)) + 1;
-
-    // Make sure we can write the '-' character.
-    if (++n > sz) {
-      buf[0] = '\000';
-      return NULL;
-    }
-    *start++ = '-';
-  }
-
   // Loop until we have converted the entire number. Output at least one
   // character (i.e. '0').
   char *ptr = start;
@@ -710,12 +695,12 @@ static char *itoa_r(intptr_t i, char *buf, size_t sz, unsigned base, size_t padd
     }
 
     // Output the next digit.
-    *ptr++ = "0123456789abcdef"[j % base];
-    j /= base;
+    *ptr++ = "0123456789abcdef"[i % base];
+    i /= base;
 
     if (padding > 0)
       padding--;
-  } while (j > 0 || padding > 0);
+  } while (i > 0 || padding > 0);
 
   // Terminate the output with a NUL character.
   *ptr = '\000';